From: pwpiwi <pwpiwi@users.noreply.github.com>
Date: Sat, 11 Jan 2020 16:11:19 +0000 (+0100)
Subject: usb communication (device side) housekeeping
X-Git-Url: http://git.zerfleddert.de/cgi-bin/gitweb.cgi/proxmark3-svn/commitdiff_plain/72622d6429ebd62f6e416356aeda565956352aed

usb communication (device side) housekeeping
* move cmd.[ch] and usb_cdc.[ch] to armsrc
* sorting out #includes
* replace byte_t by uint8_t
* some reformatting
* whitespace fixes
* (no functional changes)
---

diff --git a/armsrc/apps.h b/armsrc/apps.h
index 5d3e3e59..0431d2ee 100644
--- a/armsrc/apps.h
+++ b/armsrc/apps.h
@@ -112,8 +112,4 @@ void    ReaderMifareDES(uint32_t param, uint32_t param2, uint8_t * datain);
 int     DesfireAPDU(uint8_t *cmd, size_t cmd_len, uint8_t *dataout);
 size_t  CreateAPDU( uint8_t *datain, size_t len, uint8_t *dataout);
 
-// cmd.h
-bool cmd_receive(UsbCommand* cmd);
-bool cmd_send(uint32_t cmd, uint32_t arg0, uint32_t arg1, uint32_t arg2, void* data, size_t len);
-
 #endif
diff --git a/armsrc/cmd.c b/armsrc/cmd.c
new file mode 100644
index 00000000..71202522
--- /dev/null
+++ b/armsrc/cmd.c
@@ -0,0 +1,86 @@
+/*
+ * Proxmark send and receive commands
+ *
+ * Copyright (c) 2012, Roel Verdult
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions are met:
+ * 1. Redistributions of source code must retain the above copyright
+ * notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ * notice, this list of conditions and the following disclaimer in the
+ * documentation and/or other materials provided with the distribution.
+ * 3. Neither the name of the copyright holders nor the
+ * names of its contributors may be used to endorse or promote products
+ * derived from this software without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS ''AS IS'' AND ANY
+ * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
+ * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
+ * DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDERS BE LIABLE FOR ANY
+ * DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
+ * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
+ * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
+ * ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+ * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
+ * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ *
+ * @file cmd.c
+ * @brief
+ */
+
+#include "cmd.h"
+
+#include <stddef.h>
+#include <stdint.h>
+#include <stdbool.h>
+#include "common.h"
+#include "usb_cmd.h"
+#include "usb_cdc.h"
+
+
+bool cmd_receive(UsbCommand* cmd) {
+
+	// Check if there is a usb packet available
+	if (!usb_poll())
+		return false;
+
+	// Try to retrieve the available command frame
+	size_t rxlen = usb_read((uint8_t*)cmd, sizeof(UsbCommand));
+
+	// Check if the transfer was complete
+	if (rxlen != sizeof(UsbCommand))
+		return false;
+
+	// Received command successfully
+	return true;
+}
+
+
+bool cmd_send(uint32_t cmd, uint32_t arg0, uint32_t arg1, uint32_t arg2, void* data, size_t len) {
+	UsbCommand txcmd;
+
+	for (size_t i = 0; i < sizeof(UsbCommand); i++) {
+		((uint8_t*)&txcmd)[i] = 0x00;
+	}
+
+	// Compose the outgoing command frame
+	txcmd.cmd = cmd;
+	txcmd.arg[0] = arg0;
+	txcmd.arg[1] = arg1;
+	txcmd.arg[2] = arg2;
+
+	// Add the (optional) content to the frame, with a maximum size of USB_CMD_DATA_SIZE
+	if (data && len) {
+		len = MIN(len, USB_CMD_DATA_SIZE);
+		for (size_t i = 0; i < len; i++) {
+			txcmd.d.asBytes[i] = ((uint8_t*)data)[i];
+		}
+	}
+
+	// Send frame and make sure all bytes are transmitted
+	if (usb_write((uint8_t*)&txcmd, sizeof(UsbCommand)) != 0) return false;
+
+	return true;
+}
diff --git a/armsrc/cmd.h b/armsrc/cmd.h
new file mode 100644
index 00000000..98e13748
--- /dev/null
+++ b/armsrc/cmd.h
@@ -0,0 +1,44 @@
+/*
+ * Proxmark send and receive commands
+ *
+ * Copyright (c) 2010, Roel Verdult
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions are met:
+ * 1. Redistributions of source code must retain the above copyright
+ * notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ * notice, this list of conditions and the following disclaimer in the
+ * documentation and/or other materials provided with the distribution.
+ * 3. Neither the name of the copyright holders nor the
+ * names of its contributors may be used to endorse or promote products
+ * derived from this software without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS ''AS IS'' AND ANY
+ * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
+ * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
+ * DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDERS BE LIABLE FOR ANY
+ * DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
+ * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
+ * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
+ * ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+ * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
+ * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ *
+ * @file cmd.h
+ * @brief
+ */
+
+#ifndef PROXMARK_CMD_H__
+#define PROXMARK_CMD_H__
+
+#include <stddef.h>
+#include <stdint.h>
+#include <stdbool.h>
+#include "usb_cmd.h"
+
+extern bool cmd_receive(UsbCommand* cmd);
+extern bool cmd_send(uint32_t cmd, uint32_t arg0, uint32_t arg1, uint32_t arg2, void* data, size_t len);
+
+#endif // PROXMARK_CMD_H__
diff --git a/armsrc/hfsnoop.c b/armsrc/hfsnoop.c
index 755ac0cc..2bb7fbce 100644
--- a/armsrc/hfsnoop.c
+++ b/armsrc/hfsnoop.c
@@ -14,6 +14,7 @@
 #include "BigBuf.h"
 #include "util.h"
 #include "apps.h"
+#include "cmd.h"
 #include "usb_cdc.h"	// for usb_poll_validate_length
 #include "fpga.h"
 #include "fpgaloader.h"
diff --git a/armsrc/hitagS.c b/armsrc/hitagS.c
index 5da170bb..e7533da7 100644
--- a/armsrc/hitagS.c
+++ b/armsrc/hitagS.c
@@ -17,6 +17,7 @@
 #include <stdlib.h>
 #include "proxmark3.h"
 #include "apps.h"
+#include "cmd.h"
 #include "util.h"
 #include "hitag.h"
 #include "string.h"
diff --git a/armsrc/i2c.c b/armsrc/i2c.c
index 51513114..30cbddd0 100644
--- a/armsrc/i2c.c
+++ b/armsrc/i2c.c
@@ -18,6 +18,7 @@
 #include "mifareutil.h" // for MF_DBGLEVEL
 #include "BigBuf.h"
 #include "apps.h"
+#include "cmd.h"
 
 #ifdef WITH_SMARTCARD
 #include "smartcard.h"
diff --git a/armsrc/iso14443a.c b/armsrc/iso14443a.c
index 31a3e4cc..2d6c3e3b 100644
--- a/armsrc/iso14443a.c
+++ b/armsrc/iso14443a.c
@@ -942,7 +942,7 @@ bool prepare_allocated_tag_modulation(tag_response_info_t* response_info, uint8_
 // Main loop of simulated tag: receive commands from reader, decide what
 // response to send, and send it.
 //-----------------------------------------------------------------------------
-void SimulateIso14443aTag(int tagType, int uid_1st, int uid_2nd, byte_t* data) {
+void SimulateIso14443aTag(int tagType, int uid_1st, int uid_2nd, uint8_t* data) {
 
 	uint8_t sak;
 
@@ -1701,13 +1701,13 @@ static int GetATQA(uint8_t *resp, uint8_t *resp_par) {
 // if anticollision is false, then the UID must be provided in uid_ptr[]
 // and num_cascades must be set (1: 4 Byte UID, 2: 7 Byte UID, 3: 10 Byte UID)
 // requests ATS unless no_rats is true
-int iso14443a_select_card(byte_t *uid_ptr, iso14a_card_select_t *p_hi14a_card, uint32_t *cuid_ptr, bool anticollision, uint8_t num_cascades, bool no_rats) {
+int iso14443a_select_card(uint8_t *uid_ptr, iso14a_card_select_t *p_hi14a_card, uint32_t *cuid_ptr, bool anticollision, uint8_t num_cascades, bool no_rats) {
 	uint8_t sel_all[]    = { 0x93,0x20 };
 	uint8_t sel_uid[]    = { 0x93,0x70,0x00,0x00,0x00,0x00,0x00,0x00,0x00};
 	uint8_t rats[]       = { 0xE0,0x80,0x00,0x00 }; // FSD=256, FSDI=8, CID=0
 	uint8_t resp[MAX_FRAME_SIZE]; // theoretically. A usual RATS will be much smaller
 	uint8_t resp_par[MAX_PARITY_SIZE];
-	byte_t uid_resp[4];
+	uint8_t uid_resp[4];
 	size_t uid_resp_len;
 
 	uint8_t sak = 0x04; // cascade uid
@@ -2020,7 +2020,7 @@ void ReaderIso14443a(UsbCommand *c) {
 	size_t lenbits = c->arg[1] >> 16;
 	uint32_t timeout = c->arg[2];
 	uint32_t arg0 = 0;
-	byte_t buf[USB_CMD_DATA_SIZE] = {0};
+	uint8_t buf[USB_CMD_DATA_SIZE] = {0};
 	uint8_t par[MAX_PARITY_SIZE];
 	bool cantSELECT = false;
 
diff --git a/armsrc/iso14443a.h b/armsrc/iso14443a.h
index d2a94a78..32bf3971 100644
--- a/armsrc/iso14443a.h
+++ b/armsrc/iso14443a.h
@@ -13,6 +13,7 @@
 #ifndef __ISO14443A_H
 #define __ISO14443A_H
 
+#include <stddef.h>
 #include <stdint.h>
 #include <stdbool.h>
 #include "usb_cmd.h"
@@ -31,7 +32,7 @@ extern void GetParity(const uint8_t *pbtCmd, uint16_t len, uint8_t *par);
 extern void AppendCrc14443a(uint8_t *data, int len);
 
 extern void RAMFUNC SnoopIso14443a(uint8_t param);
-extern void SimulateIso14443aTag(int tagType, int uid_1st, int uid_2nd, byte_t *data);
+extern void SimulateIso14443aTag(int tagType, int uid_1st, int uid_2nd, uint8_t *data);
 extern void ReaderIso14443a(UsbCommand *c);
 extern void ReaderTransmit(uint8_t *frame, uint16_t len, uint32_t *timing);
 extern void ReaderTransmitBitsPar(uint8_t *frame, uint16_t bits, uint8_t *par, uint32_t *timing);
diff --git a/armsrc/iso14443b.c b/armsrc/iso14443b.c
index 6434409d..5a335e25 100644
--- a/armsrc/iso14443b.c
+++ b/armsrc/iso14443b.c
@@ -14,6 +14,7 @@
 
 #include "proxmark3.h"
 #include "apps.h"
+#include "cmd.h"
 #include "util.h"
 #include "string.h"
 #include "iso14443crc.h"
diff --git a/armsrc/legicrf.c b/armsrc/legicrf.c
index 97af8843..3bc09732 100644
--- a/armsrc/legicrf.c
+++ b/armsrc/legicrf.c
@@ -14,6 +14,7 @@
 
 #include "proxmark3.h"
 #include "apps.h"
+#include "cmd.h"
 #include "util.h"
 #include "string.h"
 #include "legic_prng.h"
diff --git a/armsrc/lfops.c b/armsrc/lfops.c
index 12f9de08..a1a31f1a 100644
--- a/armsrc/lfops.c
+++ b/armsrc/lfops.c
@@ -17,6 +17,7 @@
 #include "lfdemod.h"
 #include "lfsampling.h"
 #include "protocols.h"
+#include "cmd.h"
 #include "usb_cdc.h" // for usb_poll_validate_length
 #include "fpgaloader.h"
 
diff --git a/armsrc/pcf7931.c b/armsrc/pcf7931.c
index 147f6fb8..b0f8e4a3 100644
--- a/armsrc/pcf7931.c
+++ b/armsrc/pcf7931.c
@@ -1,5 +1,6 @@
 #include "proxmark3.h"
 #include "apps.h"
+#include "cmd.h"
 #include "lfsampling.h"
 #include "pcf7931.h"
 #include "util.h"
diff --git a/armsrc/usb_cdc.c b/armsrc/usb_cdc.c
new file mode 100644
index 00000000..269d71d7
--- /dev/null
+++ b/armsrc/usb_cdc.c
@@ -0,0 +1,684 @@
+/*
+ * at91sam7s USB CDC device implementation
+ *
+ * Copyright (c) 2012, Roel Verdult
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions are met:
+ * 1. Redistributions of source code must retain the above copyright
+ * notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ * notice, this list of conditions and the following disclaimer in the
+ * documentation and/or other materials provided with the distribution.
+ * 3. Neither the name of the copyright holders nor the
+ * names of its contributors may be used to endorse or promote products
+ * derived from this software without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS ''AS IS'' AND ANY
+ * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
+ * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
+ * DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDERS BE LIABLE FOR ANY
+ * DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
+ * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
+ * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
+ * ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+ * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
+ * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ *
+ * based on the "Basic USB Example" from ATMEL (doc6123.pdf)
+ *
+ * @file usb_cdc.c
+ * @brief
+ */
+
+#include "usb_cdc.h"
+
+#include <stddef.h>
+#include <stdint.h>
+#include <stdbool.h>
+
+#include "common.h"
+#include "at91sam7s512.h"
+#include "config_gpio.h"
+
+#define AT91C_EP_CONTROL     0
+#define AT91C_EP_OUT         1
+#define AT91C_EP_IN          2
+#define AT91C_EP_NOTIFY      3
+#define AT91C_EP_OUT_SIZE 0x40
+#define AT91C_EP_IN_SIZE  0x40
+
+// Language must always be 0.
+#define STR_LANGUAGE_CODES 0x00
+#define STR_MANUFACTURER   0x01
+#define STR_PRODUCT        0x02
+
+
+static const char devDescriptor[] = {
+	/* Device descriptor */
+	0x12,      // bLength
+	0x01,      // bDescriptorType
+	0x00,0x02, // Complies with USB Spec. Release (0200h = release 2.0)
+	0x02,      // bDeviceClass:    (Communication Device Class)
+	0x00,      // bDeviceSubclass: (unused at this time)
+	0x00,      // bDeviceProtocol: (unused at this time)
+	0x08,      // bMaxPacketSize0
+	0xc4,0x9a, // Vendor ID (0x9ac4 = J. Westhues)
+	0x8f,0x4b, // Product ID (0x4b8f = Proxmark-3 RFID Instrument)
+	0x01,0x00, // Device release number (0001)
+	STR_MANUFACTURER,  // iManufacturer
+	STR_PRODUCT,       // iProduct
+	0x00,      // iSerialNumber
+	0x01       // bNumConfigs
+};
+
+
+static const char cfgDescriptor[] = {
+	/* ============== CONFIGURATION 1 =========== */
+	/* Configuration 1 descriptor */
+	0x09,   // CbLength
+	0x02,   // CbDescriptorType
+	0x43,   // CwTotalLength 2 EP + Control
+	0x00,
+	0x02,   // CbNumInterfaces
+	0x01,   // CbConfigurationValue
+	0x00,   // CiConfiguration
+	0x80,   // CbmAttributes (Bus Powered)
+	0x4B,   // CMaxPower (150mA max current drawn from bus)
+
+	/* Interface 0 Descriptor: Communication Class Interface */
+	0x09, // bLength
+	0x04, // bDescriptorType
+	0x00, // bInterfaceNumber
+	0x00, // bAlternateSetting
+	0x01, // bNumEndpoints
+	0x02, // bInterfaceClass:       Communication Interface Class
+	0x02, // bInterfaceSubclass:    Abstract Control Model
+	0x01, // bInterfaceProtocol:    Common AT Commands, V.25ter
+	0x00, // iInterface
+
+	/* Header Functional Descriptor */
+	0x05, // bFunction Length
+	0x24, // bDescriptor type:      CS_INTERFACE
+	0x00, // bDescriptor subtype:   Header Functional Descriptor
+	0x10, // bcdCDC:1.1
+	0x01,
+
+	/* ACM Functional Descriptor */
+	0x04, // bFunctionLength
+	0x24, // bDescriptor Type:      CS_INTERFACE
+	0x02, // bDescriptor Subtype:   Abstract Control Management Functional Descriptor
+	0x02, // bmCapabilities:        D1: Device supports the request combination of Set_Line_Coding, Set_Control_Line_State, Get_Line_Coding, and the notification Serial_State
+
+	/* Union Functional Descriptor */
+	0x05, // bFunctionLength
+	0x24, // bDescriptorType:       CS_INTERFACE
+	0x06, // bDescriptor Subtype:   Union Functional Descriptor
+	0x00, // bMasterInterface:      Communication Class Interface
+	0x01, // bSlaveInterface0:      Data Class Interface
+
+	/* Call Management Functional Descriptor */
+	0x05, // bFunctionLength
+	0x24, // bDescriptor Type:      CS_INTERFACE
+	0x01, // bDescriptor Subtype:   Call Management Functional Descriptor
+	0x00, // bmCapabilities:        Device sends/receives call management information only over the Communication Class interface. Device does not handle call management itself
+	0x01, // bDataInterface:        Data Class Interface 1
+
+	/* Endpoint 1 descriptor */
+	0x07,   // bLength
+	0x05,   // bDescriptorType
+	0x83,   // bEndpointAddress:    Endpoint 03 - IN
+	0x03,   // bmAttributes:        INT
+	0x08,   // wMaxPacketSize:      8
+	0x00,
+	0xFF,   // bInterval
+
+	/* Interface 1 Descriptor: Data Class Interface */
+	0x09, // bLength
+	0x04, // bDescriptorType
+	0x01, // bInterfaceNumber
+	0x00, // bAlternateSetting
+	0x02, // bNumEndpoints
+	0x0A, // bInterfaceClass:       Data Interface Class
+	0x00, // bInterfaceSubclass:    not used
+	0x00, // bInterfaceProtocol:    No class specific protocol required)
+	0x00, // iInterface
+
+	/* Endpoint 1 descriptor */
+	0x07,   // bLength
+	0x05,   // bDescriptorType
+	0x01,   // bEndpointAddress:    Endpoint 01 - OUT
+	0x02,   // bmAttributes:        BULK
+	AT91C_EP_OUT_SIZE, // wMaxPacketSize
+	0x00,
+	0x00,   // bInterval
+
+	/* Endpoint 2 descriptor */
+	0x07,   // bLength
+	0x05,   // bDescriptorType
+	0x82,   // bEndpointAddress:    Endpoint 02 - IN
+	0x02,   // bmAttributes:        BULK
+	AT91C_EP_IN_SIZE,   // wMaxPacketSize
+	0x00,
+	0x00    // bInterval
+};
+
+
+static const char StrDescLanguageCodes[] = {
+	4,          // Length
+	0x03,       // Type is string
+	0x09, 0x04  // supported language Code 0 = 0x0409 (English)
+};
+
+
+// Note: ModemManager (Linux) ignores Proxmark3 devices by matching the
+// manufacturer string "proxmark.org". Don't change this.
+static const char StrDescManufacturer[] = {
+	26,         // Length
+	0x03,       // Type is string
+	'p', 0x00,
+	'r', 0x00,
+	'o', 0x00,
+	'x', 0x00,
+	'm', 0x00,
+	'a', 0x00,
+	'r', 0x00,
+	'k', 0x00,
+	'.', 0x00,
+	'o', 0x00,
+	'r', 0x00,
+	'g', 0x00
+};
+
+
+static const char StrDescProduct[] = {
+	20,         // Length
+	0x03,       // Type is string
+	'p', 0x00,
+	'r', 0x00,
+	'o', 0x00,
+	'x', 0x00,
+	'm', 0x00,
+	'a', 0x00,
+	'r', 0x00,
+	'k', 0x00,
+	'3', 0x00
+};
+
+
+const char* getStringDescriptor(uint8_t idx) {
+	switch (idx) {
+		case STR_LANGUAGE_CODES:
+			return StrDescLanguageCodes;
+		case STR_MANUFACTURER:
+			return StrDescManufacturer;
+		case STR_PRODUCT:
+			return StrDescProduct;
+		default:
+			return NULL;
+	}
+}
+
+
+// Bitmap for all status bits in CSR which must be written as 1 to cause no effect
+#define REG_NO_EFFECT_1_ALL      AT91C_UDP_RX_DATA_BK0 | AT91C_UDP_RX_DATA_BK1 \
+								|AT91C_UDP_STALLSENT   | AT91C_UDP_RXSETUP \
+								|AT91C_UDP_TXCOMP
+
+
+// Clear flags in the UDP_CSR register
+#define UDP_CLEAR_EP_FLAGS(endpoint, flags) { \
+	volatile unsigned int reg; \
+	reg = pUdp->UDP_CSR[(endpoint)]; \
+	reg |= REG_NO_EFFECT_1_ALL; \
+	reg &= ~(flags); \
+	pUdp->UDP_CSR[(endpoint)] = reg; \
+}
+
+
+// Set flags in the UDP_CSR register
+#define UDP_SET_EP_FLAGS(endpoint, flags) { \
+	volatile unsigned int reg; \
+	reg = pUdp->UDP_CSR[(endpoint)]; \
+	reg |= REG_NO_EFFECT_1_ALL; \
+	reg |= (flags); \
+	pUdp->UDP_CSR[(endpoint)] = reg; \
+}
+
+
+/* USB standard request codes */
+#define STD_GET_STATUS_ZERO           0x0080
+#define STD_GET_STATUS_INTERFACE      0x0081
+#define STD_GET_STATUS_ENDPOINT       0x0082
+
+#define STD_CLEAR_FEATURE_ZERO        0x0100
+#define STD_CLEAR_FEATURE_INTERFACE   0x0101
+#define STD_CLEAR_FEATURE_ENDPOINT    0x0102
+
+#define STD_SET_FEATURE_ZERO          0x0300
+#define STD_SET_FEATURE_INTERFACE     0x0301
+#define STD_SET_FEATURE_ENDPOINT      0x0302
+
+#define STD_SET_ADDRESS               0x0500
+#define STD_GET_DESCRIPTOR            0x0680
+#define STD_SET_DESCRIPTOR            0x0700
+#define STD_GET_CONFIGURATION         0x0880
+#define STD_SET_CONFIGURATION         0x0900
+#define STD_GET_INTERFACE             0x0A81
+#define STD_SET_INTERFACE             0x0B01
+#define STD_SYNCH_FRAME               0x0C82
+
+/* CDC Class Specific Request Code */
+#define GET_LINE_CODING               0x21A1
+#define SET_LINE_CODING               0x2021
+#define SET_CONTROL_LINE_STATE        0x2221
+
+
+typedef struct {
+	unsigned int dwDTERRate;
+	char bCharFormat;
+	char bParityType;
+	char bDataBits;
+} AT91S_CDC_LINE_CODING, *AT91PS_CDC_LINE_CODING;
+
+
+AT91S_CDC_LINE_CODING line = {
+	115200, // baudrate
+	0,      // 1 Stop Bit
+	0,      // None Parity
+	8};     // 8 Data bits
+
+
+void AT91F_CDC_Enumerate();
+
+AT91PS_UDP pUdp = AT91C_BASE_UDP;
+uint8_t btConfiguration = 0;
+uint8_t btConnection    = 0;
+uint8_t btReceiveBank   = AT91C_UDP_RX_DATA_BK0;
+
+
+//*----------------------------------------------------------------------------
+//* \fn    usb_disable
+//* \brief This function deactivates the USB device
+//*----------------------------------------------------------------------------
+void usb_disable() {
+	// Disconnect the USB device
+	AT91C_BASE_PIOA->PIO_ODR = GPIO_USB_PU;
+
+	// Clear all lingering interrupts
+	if (pUdp->UDP_ISR & AT91C_UDP_ENDBUSRES) {
+		pUdp->UDP_ICR = AT91C_UDP_ENDBUSRES;
+	}
+}
+
+
+//*----------------------------------------------------------------------------
+//* \fn    usb_enable
+//* \brief This function Activates the USB device
+//*----------------------------------------------------------------------------
+void usb_enable() {
+	// Set the PLL USB Divider
+	AT91C_BASE_CKGR->CKGR_PLLR |= AT91C_CKGR_USBDIV_1 ;
+
+	// Specific Chip USB Initialisation
+	// Enables the 48MHz USB clock UDPCK and System Peripheral USB Clock
+	AT91C_BASE_PMC->PMC_SCER = AT91C_PMC_UDP;
+	AT91C_BASE_PMC->PMC_PCER = (1 << AT91C_ID_UDP);
+
+	// Enable UDP PullUp (USB_DP_PUP) : enable & Clear of the corresponding PIO
+	// Set in PIO mode and Configure in Output
+	AT91C_BASE_PIOA->PIO_PER = GPIO_USB_PU; // Set in PIO mode
+	AT91C_BASE_PIOA->PIO_OER = GPIO_USB_PU; // Configure as Output
+
+	// Clear for set the Pullup resistor
+	AT91C_BASE_PIOA->PIO_CODR = GPIO_USB_PU;
+
+	// Disconnect and reconnect USB controller for 100ms
+	usb_disable();
+
+	// Wait for a short while
+	for (volatile size_t i = 0; i < 0x100000; i++);
+
+	// Reconnect USB reconnect
+	AT91C_BASE_PIOA->PIO_SODR = GPIO_USB_PU;
+	AT91C_BASE_PIOA->PIO_OER = GPIO_USB_PU;
+}
+
+
+//*----------------------------------------------------------------------------
+//* \fn    usb_check
+//* \brief Test if the device is configured and handle enumeration
+//*----------------------------------------------------------------------------
+bool usb_check() {
+	AT91_REG isr = pUdp->UDP_ISR;
+
+	if (isr & AT91C_UDP_ENDBUSRES) {
+		pUdp->UDP_ICR = AT91C_UDP_ENDBUSRES;
+		// reset all endpoints
+		pUdp->UDP_RSTEP  = (unsigned int)-1;
+		pUdp->UDP_RSTEP  = 0;
+		// Enable the function
+		pUdp->UDP_FADDR = AT91C_UDP_FEN;
+		// Configure endpoint 0
+		pUdp->UDP_CSR[AT91C_EP_CONTROL] = (AT91C_UDP_EPEDS | AT91C_UDP_EPTYPE_CTRL);
+	} else if (isr & AT91C_UDP_EPINT0) {
+		pUdp->UDP_ICR = AT91C_UDP_EPINT0;
+		AT91F_CDC_Enumerate();
+	}
+	return (btConfiguration) ? true : false;
+}
+
+
+bool usb_poll() {
+	if (!usb_check()) return false;
+	return (pUdp->UDP_CSR[AT91C_EP_OUT] & btReceiveBank);
+}
+
+
+/**
+	In github PR #129, some users appears to get a false positive from
+	usb_poll, which returns true, but the usb_read operation
+	still returns 0.
+	This check is basically the same as above, but also checks
+	that the length available to read is non-zero, thus hopefully fixes the
+	bug.
+**/
+bool usb_poll_validate_length() {
+	if (!usb_check()) return false;
+	if (!(pUdp->UDP_CSR[AT91C_EP_OUT] & btReceiveBank)) return false;
+	return (pUdp->UDP_CSR[AT91C_EP_OUT] >> 16) >  0;
+}
+
+
+//*----------------------------------------------------------------------------
+//* \fn    usb_read
+//* \brief Read available data from Endpoint OUT
+//*----------------------------------------------------------------------------
+uint32_t usb_read(uint8_t* data, size_t len) {
+	uint8_t bank = btReceiveBank;
+	uint32_t packetSize, nbBytesRcv = 0;
+	uint32_t time_out = 0;
+
+	while (len)  {
+		if (!usb_check()) break;
+
+		if ( pUdp->UDP_CSR[AT91C_EP_OUT] & bank ) {
+			packetSize = MIN(pUdp->UDP_CSR[AT91C_EP_OUT] >> 16, len);
+			len -= packetSize;
+			while (packetSize--)
+				data[nbBytesRcv++] = pUdp->UDP_FDR[AT91C_EP_OUT];
+			UDP_CLEAR_EP_FLAGS(AT91C_EP_OUT, bank);
+			if (bank == AT91C_UDP_RX_DATA_BK0) {
+				bank = AT91C_UDP_RX_DATA_BK1;
+			} else {
+				bank = AT91C_UDP_RX_DATA_BK0;
+			}
+		}
+		if (time_out++ == 0x1fff) break;
+	}
+
+	btReceiveBank = bank;
+	return nbBytesRcv;
+}
+
+
+//*----------------------------------------------------------------------------
+//* \fn    usb_write
+//* \brief Send through endpoint 2
+//*----------------------------------------------------------------------------
+uint32_t usb_write(const uint8_t* data, const size_t len) {
+	size_t length = len;
+	uint32_t cpt = 0;
+
+	if (!length) return 0;
+	if (!usb_check()) return 0;
+
+	// Send the first packet
+	cpt = MIN(length, AT91C_EP_IN_SIZE);
+	length -= cpt;
+	while (cpt--) {
+		pUdp->UDP_FDR[AT91C_EP_IN] = *data++;
+	}
+	UDP_SET_EP_FLAGS(AT91C_EP_IN, AT91C_UDP_TXPKTRDY);
+
+	while (length) {
+		// Fill the next bank
+		cpt = MIN(length, AT91C_EP_IN_SIZE);
+		length -= cpt;
+		while (cpt--) {
+			pUdp->UDP_FDR[AT91C_EP_IN] = *data++;
+		}
+		// Wait for the previous bank to be sent
+		while (!(pUdp->UDP_CSR[AT91C_EP_IN] & AT91C_UDP_TXCOMP)) {
+			if (!usb_check()) return length;
+		}
+		UDP_CLEAR_EP_FLAGS(AT91C_EP_IN, AT91C_UDP_TXCOMP);
+		while (pUdp->UDP_CSR[AT91C_EP_IN] & AT91C_UDP_TXCOMP)
+			/* wait */;
+		UDP_SET_EP_FLAGS(AT91C_EP_IN, AT91C_UDP_TXPKTRDY);
+	}
+
+	// Wait for the end of transfer
+	while (!(pUdp->UDP_CSR[AT91C_EP_IN] & AT91C_UDP_TXCOMP)) {
+		if (!usb_check()) return length;
+	}
+
+	UDP_CLEAR_EP_FLAGS(AT91C_EP_IN, AT91C_UDP_TXCOMP);
+	while (pUdp->UDP_CSR[AT91C_EP_IN] & AT91C_UDP_TXCOMP)
+		/* wait */;
+
+	return length;
+}
+
+
+//*----------------------------------------------------------------------------
+//* \fn    AT91F_USB_SendData
+//* \brief Send Data through the control endpoint
+//*----------------------------------------------------------------------------
+unsigned int csrTab[100] = {0x00};
+unsigned char csrIdx = 0;
+
+static void AT91F_USB_SendData(AT91PS_UDP pUdp, const char *pData, uint32_t length) {
+	uint32_t cpt = 0;
+	AT91_REG csr;
+
+	do {
+		cpt = MIN(length, 8);
+		length -= cpt;
+
+		while (cpt--)
+			pUdp->UDP_FDR[0] = *pData++;
+
+		if (pUdp->UDP_CSR[AT91C_EP_CONTROL] & AT91C_UDP_TXCOMP) {
+			UDP_CLEAR_EP_FLAGS(AT91C_EP_CONTROL, AT91C_UDP_TXCOMP);
+			while (pUdp->UDP_CSR[AT91C_EP_CONTROL] & AT91C_UDP_TXCOMP)
+				/* wait */;
+		}
+
+		UDP_SET_EP_FLAGS(AT91C_EP_CONTROL, AT91C_UDP_TXPKTRDY);
+		do {
+			csr = pUdp->UDP_CSR[AT91C_EP_CONTROL];
+
+			// Data IN stage has been stopped by a status OUT
+			if (csr & AT91C_UDP_RX_DATA_BK0) {
+				UDP_CLEAR_EP_FLAGS(AT91C_EP_CONTROL, AT91C_UDP_RX_DATA_BK0);
+				return;
+			}
+		} while (!(csr & AT91C_UDP_TXCOMP));
+
+	} while (length);
+
+	if (pUdp->UDP_CSR[AT91C_EP_CONTROL] & AT91C_UDP_TXCOMP) {
+		UDP_CLEAR_EP_FLAGS(AT91C_EP_CONTROL, AT91C_UDP_TXCOMP);
+		while (pUdp->UDP_CSR[AT91C_EP_CONTROL] & AT91C_UDP_TXCOMP)
+			/* wait */;
+	}
+}
+
+
+//*----------------------------------------------------------------------------
+//* \fn    AT91F_USB_SendZlp
+//* \brief Send zero length packet through the control endpoint
+//*----------------------------------------------------------------------------
+void AT91F_USB_SendZlp(AT91PS_UDP pUdp) {
+	UDP_SET_EP_FLAGS(AT91C_EP_CONTROL, AT91C_UDP_TXPKTRDY);
+	while (!(pUdp->UDP_CSR[AT91C_EP_CONTROL] & AT91C_UDP_TXCOMP))
+		/* wait */;
+	UDP_CLEAR_EP_FLAGS(AT91C_EP_CONTROL, AT91C_UDP_TXCOMP);
+	while (pUdp->UDP_CSR[AT91C_EP_CONTROL] & AT91C_UDP_TXCOMP)
+		/* wait */;
+}
+
+
+//*----------------------------------------------------------------------------
+//* \fn    AT91F_USB_SendStall
+//* \brief Stall the control endpoint
+//*----------------------------------------------------------------------------
+void AT91F_USB_SendStall(AT91PS_UDP pUdp) {
+	UDP_SET_EP_FLAGS(AT91C_EP_CONTROL, AT91C_UDP_FORCESTALL);
+	while (!(pUdp->UDP_CSR[AT91C_EP_CONTROL] & AT91C_UDP_ISOERROR))
+		/* wait */;
+	UDP_CLEAR_EP_FLAGS(AT91C_EP_CONTROL, AT91C_UDP_FORCESTALL | AT91C_UDP_ISOERROR);
+	while (pUdp->UDP_CSR[AT91C_EP_CONTROL] & (AT91C_UDP_FORCESTALL | AT91C_UDP_ISOERROR))
+		/* wait */;
+}
+
+
+//*----------------------------------------------------------------------------
+//* \fn    AT91F_CDC_Enumerate
+//* \brief This function is a callback invoked when a SETUP packet is received
+//*----------------------------------------------------------------------------
+void AT91F_CDC_Enumerate() {
+	uint8_t bmRequestType, bRequest;
+	uint16_t wValue, wIndex, wLength, wStatus;
+
+	if (!(pUdp->UDP_CSR[AT91C_EP_CONTROL] & AT91C_UDP_RXSETUP))
+		return;
+
+	bmRequestType = pUdp->UDP_FDR[AT91C_EP_CONTROL];
+	bRequest      = pUdp->UDP_FDR[AT91C_EP_CONTROL];
+	wValue        = (pUdp->UDP_FDR[AT91C_EP_CONTROL] & 0xFF);
+	wValue       |= (pUdp->UDP_FDR[AT91C_EP_CONTROL] << 8);
+	wIndex        = (pUdp->UDP_FDR[AT91C_EP_CONTROL] & 0xFF);
+	wIndex       |= (pUdp->UDP_FDR[AT91C_EP_CONTROL] << 8);
+	wLength       = (pUdp->UDP_FDR[AT91C_EP_CONTROL] & 0xFF);
+	wLength      |= (pUdp->UDP_FDR[AT91C_EP_CONTROL] << 8);
+
+	if (bmRequestType & 0x80) { // Data Phase Transfer Direction Device to Host
+		UDP_SET_EP_FLAGS(AT91C_EP_CONTROL, AT91C_UDP_DIR);
+		while (!(pUdp->UDP_CSR[AT91C_EP_CONTROL] & AT91C_UDP_DIR))
+			/* wait */;
+	}
+	UDP_CLEAR_EP_FLAGS(AT91C_EP_CONTROL, AT91C_UDP_RXSETUP);
+	while (pUdp->UDP_CSR[AT91C_EP_CONTROL] & AT91C_UDP_RXSETUP)
+		/* wait */;
+
+	// Handle supported standard device request Cf Table 9-3 in USB specification Rev 1.1
+	switch ((bRequest << 8) | bmRequestType) {
+	case STD_GET_DESCRIPTOR:
+		if (wValue == 0x100)       // Return Device Descriptor
+			AT91F_USB_SendData(pUdp, devDescriptor, MIN(sizeof(devDescriptor), wLength));
+		else if (wValue == 0x200)  // Return Configuration Descriptor
+			AT91F_USB_SendData(pUdp, cfgDescriptor, MIN(sizeof(cfgDescriptor), wLength));
+		else if ((wValue & 0xF00) == 0x300) { // Return String Descriptor
+			const char *strDescriptor = getStringDescriptor(wValue & 0xff);
+			if (strDescriptor != NULL) {
+				AT91F_USB_SendData(pUdp, strDescriptor, MIN(strDescriptor[0], wLength));
+			} else {
+				AT91F_USB_SendStall(pUdp);
+			}
+		}
+		else
+			AT91F_USB_SendStall(pUdp);
+		break;
+	case STD_SET_ADDRESS:
+		AT91F_USB_SendZlp(pUdp);
+		pUdp->UDP_FADDR = (AT91C_UDP_FEN | wValue);
+		pUdp->UDP_GLBSTATE  = (wValue) ? AT91C_UDP_FADDEN : 0;
+		break;
+	case STD_SET_CONFIGURATION:
+		btConfiguration = wValue;
+		AT91F_USB_SendZlp(pUdp);
+		pUdp->UDP_GLBSTATE  = (wValue) ? AT91C_UDP_CONFG : AT91C_UDP_FADDEN;
+		pUdp->UDP_CSR[AT91C_EP_OUT]    = (wValue) ? (AT91C_UDP_EPEDS | AT91C_UDP_EPTYPE_BULK_OUT) : 0;
+		pUdp->UDP_CSR[AT91C_EP_IN]     = (wValue) ? (AT91C_UDP_EPEDS | AT91C_UDP_EPTYPE_BULK_IN)  : 0;
+		pUdp->UDP_CSR[AT91C_EP_NOTIFY] = (wValue) ? (AT91C_UDP_EPEDS | AT91C_UDP_EPTYPE_INT_IN)   : 0;
+		break;
+	case STD_GET_CONFIGURATION:
+		AT91F_USB_SendData(pUdp, (char *) &(btConfiguration), sizeof(btConfiguration));
+		break;
+	case STD_GET_STATUS_ZERO:
+		wStatus = 0;    // Device is Bus powered, remote wakeup disabled
+		AT91F_USB_SendData(pUdp, (char *) &wStatus, sizeof(wStatus));
+		break;
+	case STD_GET_STATUS_INTERFACE:
+		wStatus = 0;    // reserved for future use
+		AT91F_USB_SendData(pUdp, (char *) &wStatus, sizeof(wStatus));
+		break;
+	case STD_GET_STATUS_ENDPOINT:
+		wStatus = 0;
+		wIndex &= 0x0F;
+		if ((pUdp->UDP_GLBSTATE & AT91C_UDP_CONFG) && (wIndex <= AT91C_EP_NOTIFY)) {
+			wStatus = (pUdp->UDP_CSR[wIndex] & AT91C_UDP_EPEDS) ? 0 : 1;
+			AT91F_USB_SendData(pUdp, (char *) &wStatus, sizeof(wStatus));
+		} else if ((pUdp->UDP_GLBSTATE & AT91C_UDP_FADDEN) && (wIndex == AT91C_EP_CONTROL)) {
+			wStatus = (pUdp->UDP_CSR[wIndex] & AT91C_UDP_EPEDS) ? 0 : 1;
+			AT91F_USB_SendData(pUdp, (char *) &wStatus, sizeof(wStatus));
+		} else
+			AT91F_USB_SendStall(pUdp);
+		break;
+	case STD_SET_FEATURE_ZERO:
+		AT91F_USB_SendStall(pUdp);
+		break;
+	case STD_SET_FEATURE_INTERFACE:
+		AT91F_USB_SendZlp(pUdp);
+		break;
+	case STD_SET_FEATURE_ENDPOINT:
+		wIndex &= 0x0F;
+		if ((wValue == 0) && (wIndex >= AT91C_EP_OUT) && (wIndex <= AT91C_EP_NOTIFY)) {
+			pUdp->UDP_CSR[wIndex] = 0;
+			AT91F_USB_SendZlp(pUdp);
+		} else
+			AT91F_USB_SendStall(pUdp);
+		break;
+	case STD_CLEAR_FEATURE_ZERO:
+		AT91F_USB_SendStall(pUdp);
+		break;
+	case STD_CLEAR_FEATURE_INTERFACE:
+		AT91F_USB_SendZlp(pUdp);
+		break;
+	case STD_CLEAR_FEATURE_ENDPOINT:
+		wIndex &= 0x0F;
+		if ((wValue == 0) && (wIndex >= AT91C_EP_OUT) && (wIndex <= AT91C_EP_NOTIFY)) {
+			if (wIndex == AT91C_EP_OUT)
+				pUdp->UDP_CSR[AT91C_EP_OUT] = (AT91C_UDP_EPEDS | AT91C_UDP_EPTYPE_BULK_OUT);
+			else if (wIndex == AT91C_EP_IN)
+				pUdp->UDP_CSR[AT91C_EP_IN] = (AT91C_UDP_EPEDS | AT91C_UDP_EPTYPE_BULK_IN);
+			else if (wIndex == AT91C_EP_NOTIFY)
+				pUdp->UDP_CSR[AT91C_EP_NOTIFY] = (AT91C_UDP_EPEDS | AT91C_UDP_EPTYPE_INT_IN);
+			AT91F_USB_SendZlp(pUdp);
+		}
+		else
+			AT91F_USB_SendStall(pUdp);
+		break;
+
+	// handle CDC class requests
+	case SET_LINE_CODING:
+		while ( (pUdp->UDP_CSR[AT91C_EP_CONTROL] & AT91C_UDP_RX_DATA_BK0))
+			/* wait */;
+		UDP_CLEAR_EP_FLAGS(AT91C_EP_CONTROL, AT91C_UDP_RX_DATA_BK0);
+		AT91F_USB_SendZlp(pUdp);
+		break;
+	case GET_LINE_CODING:
+		AT91F_USB_SendData(pUdp, (char *) &line, MIN(sizeof(line), wLength));
+		break;
+	case SET_CONTROL_LINE_STATE:
+		btConnection = wValue;
+		AT91F_USB_SendZlp(pUdp);
+		break;
+	default:
+		AT91F_USB_SendStall(pUdp);
+		break;
+	}
+}
diff --git a/armsrc/usb_cdc.h b/armsrc/usb_cdc.h
new file mode 100644
index 00000000..085b9844
--- /dev/null
+++ b/armsrc/usb_cdc.h
@@ -0,0 +1,50 @@
+/*
+ * at91sam7s USB CDC device implementation
+ *
+ * Copyright (c) 2012, Roel Verdult
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions are met:
+ * 1. Redistributions of source code must retain the above copyright
+ * notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ * notice, this list of conditions and the following disclaimer in the
+ * documentation and/or other materials provided with the distribution.
+ * 3. Neither the name of the copyright holders nor the
+ * names of its contributors may be used to endorse or promote products
+ * derived from this software without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS ''AS IS'' AND ANY
+ * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
+ * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
+ * DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDERS BE LIABLE FOR ANY
+ * DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
+ * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
+ * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
+ * ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+ * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
+ * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ *
+ * based on the "Basic USB Example" from ATMEL (doc6123.pdf)
+ *
+ * @file usb_cdc.c
+ * @brief
+ */
+
+#ifndef USB_CDC_H__
+#define USB_CDC_H__
+
+#include <stddef.h>
+#include <stdint.h>
+#include <stdbool.h>
+
+extern void usb_disable();
+extern void usb_enable();
+extern bool usb_check();
+extern bool usb_poll();
+extern bool usb_poll_validate_length();
+extern uint32_t usb_read(uint8_t* data, size_t len);
+extern uint32_t usb_write(const uint8_t* data, const size_t len);
+
+#endif // _USB_CDC_H__
diff --git a/armsrc/util.h b/armsrc/util.h
index 14ac5e10..bdb7fafd 100644
--- a/armsrc/util.h
+++ b/armsrc/util.h
@@ -8,12 +8,13 @@
 // Utility functions used in many places, not specific to any piece of code.
 //-----------------------------------------------------------------------------
 
-#ifndef __UTIL_H
-#define __UTIL_H
+#ifndef UTIL_H__
+#define UTIL_H__
 
 #include <stddef.h>
 #include <stdint.h>
 #include "common.h"
+#include "at91sam7s512.h"
 
 #define BYTEx(x, n) (((x) >> (n * 8)) & 0xff )
 
@@ -33,40 +34,40 @@
 #define REV32(x) (REV16(x) | (REV16(x >> 16) << 16))
 #define REV64(x) (REV32(x) | (REV32(x >> 32) << 32))
 
-void print_result(char *name, uint8_t *buf, size_t len);
-size_t nbytes(size_t nbits);
-uint32_t SwapBits(uint32_t value, int nrbits);
-void num_to_bytes(uint64_t n, size_t len, uint8_t* dest);
-uint64_t bytes_to_num(uint8_t* src, size_t len);
-void rol(uint8_t *data, const size_t len);
-void lsl (uint8_t *data, size_t len);
-
-void LED(int led, int ms);
-void LEDsoff();
-void LEDson();
-void LEDsinvert();
-int BUTTON_CLICKED(int ms);
-int BUTTON_HELD(int ms);
-void FormatVersionInformation(char *dst, int len, const char *prefix, void *version_information);
+extern void print_result(char *name, uint8_t *buf, size_t len);
+extern size_t nbytes(size_t nbits);
+extern uint32_t SwapBits(uint32_t value, int nrbits);
+extern void num_to_bytes(uint64_t n, size_t len, uint8_t* dest);
+extern uint64_t bytes_to_num(uint8_t* src, size_t len);
+extern void rol(uint8_t *data, const size_t len);
+extern void lsl (uint8_t *data, size_t len);
+
+extern void LED(int led, int ms);
+extern void LEDsoff();
+extern void LEDson();
+extern void LEDsinvert();
+extern int BUTTON_CLICKED(int ms);
+extern int BUTTON_HELD(int ms);
+extern void FormatVersionInformation(char *dst, int len, const char *prefix, void *version_information);
 
 //iceman's ticks.h
 #ifndef GET_TICKS
 # define GET_TICKS GetTicks()
 #endif
 
-void SpinDelay(int ms);
-void SpinDelayUs(int us);
+extern void SpinDelay(int ms);
+extern void SpinDelayUs(int us);
 
-void StartTickCount();
-uint32_t RAMFUNC GetTickCount();
+extern void StartTickCount();
+extern uint32_t RAMFUNC GetTickCount();
 
-void StartCountUS();
-uint32_t RAMFUNC GetCountUS();
-uint32_t RAMFUNC GetDeltaCountUS();
+extern void StartCountUS();
+extern uint32_t RAMFUNC GetCountUS();
+extern uint32_t RAMFUNC GetDeltaCountUS();
 
-void StartCountSspClk();
-void ResetSspClk(void);
-uint32_t GetCountSspClk();
+extern void StartCountSspClk();
+extern void ResetSspClk(void);
+extern uint32_t GetCountSspClk();
 
 extern void StartTicks(void);
 extern uint32_t GetTicks(void);
@@ -78,6 +79,6 @@ extern void ResetTimer(AT91PS_TC timer);
 extern void StopTicks(void);
 // end iceman's ticks.h
 
-uint32_t prand();
+extern uint32_t prand();
 
 #endif
diff --git a/common/cmd.c b/common/cmd.c
deleted file mode 100644
index 0c3ecc1f..00000000
--- a/common/cmd.c
+++ /dev/null
@@ -1,79 +0,0 @@
-/*
- * Proxmark send and receive commands
- *
- * Copyright (c) 2012, Roel Verdult
- * All rights reserved.
- *
- * Redistribution and use in source and binary forms, with or without
- * modification, are permitted provided that the following conditions are met:
- * 1. Redistributions of source code must retain the above copyright
- * notice, this list of conditions and the following disclaimer.
- * 2. Redistributions in binary form must reproduce the above copyright
- * notice, this list of conditions and the following disclaimer in the
- * documentation and/or other materials provided with the distribution.
- * 3. Neither the name of the copyright holders nor the
- * names of its contributors may be used to endorse or promote products
- * derived from this software without specific prior written permission.
- *
- * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS ''AS IS'' AND ANY
- * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
- * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
- * DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDERS BE LIABLE FOR ANY
- * DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
- * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
- * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
- * ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
- * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
- * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
- *
- * @file cmd.c
- * @brief
- */
-
-#include "cmd.h"
-#include "string.h"
-#include "proxmark3.h"
-
-bool cmd_receive(UsbCommand* cmd) {
- 
-  // Check if there is a usb packet available
-  if (!usb_poll()) return false;
-  
-  // Try to retrieve the available command frame
-  size_t rxlen = usb_read((byte_t*)cmd,sizeof(UsbCommand));
-
-  // Check if the transfer was complete
-  if (rxlen != sizeof(UsbCommand)) return false;
-  
-  // Received command successfully
-  return true;
-}
-
-bool cmd_send(uint32_t cmd, uint32_t arg0, uint32_t arg1, uint32_t arg2, void* data, size_t len) {
-  UsbCommand txcmd;
-
-  for (size_t i=0; i<sizeof(UsbCommand); i++) {
-    ((byte_t*)&txcmd)[i] = 0x00;
-  }
-  
-  // Compose the outgoing command frame
-  txcmd.cmd = cmd;
-  txcmd.arg[0] = arg0;
-  txcmd.arg[1] = arg1;	
-  txcmd.arg[2] = arg2;
-
-  // Add the (optional) content to the frame, with a maximum size of USB_CMD_DATA_SIZE
-  if (data && len) {
-    len = MIN(len,USB_CMD_DATA_SIZE);
-    for (size_t i=0; i<len; i++) {
-      txcmd.d.asBytes[i] = ((byte_t*)data)[i];
-    }
-  }
-  
-  // Send frame and make sure all bytes are transmitted
-  if (usb_write((byte_t*)&txcmd,sizeof(UsbCommand)) != 0) return false;
-  
-  return true;
-}
-
-
diff --git a/common/cmd.h b/common/cmd.h
deleted file mode 100644
index bc69ff61..00000000
--- a/common/cmd.h
+++ /dev/null
@@ -1,44 +0,0 @@
-/*
- * Proxmark send and receive commands
- *
- * Copyright (c) 2010, Roel Verdult
- * All rights reserved.
- *
- * Redistribution and use in source and binary forms, with or without
- * modification, are permitted provided that the following conditions are met:
- * 1. Redistributions of source code must retain the above copyright
- * notice, this list of conditions and the following disclaimer.
- * 2. Redistributions in binary form must reproduce the above copyright
- * notice, this list of conditions and the following disclaimer in the
- * documentation and/or other materials provided with the distribution.
- * 3. Neither the name of the copyright holders nor the
- * names of its contributors may be used to endorse or promote products
- * derived from this software without specific prior written permission.
- *
- * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS ''AS IS'' AND ANY
- * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
- * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
- * DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDERS BE LIABLE FOR ANY
- * DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
- * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
- * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
- * ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
- * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
- * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
- *
- * @file cmd.h
- * @brief
- */
-
-#ifndef _PROXMARK_CMD_H_
-#define _PROXMARK_CMD_H_
-
-#include "common.h"
-#include "usb_cmd.h"
-#include "usb_cdc.h"
-
-bool cmd_receive(UsbCommand* cmd);
-bool cmd_send(uint32_t cmd, uint32_t arg0, uint32_t arg1, uint32_t arg2, void* data, size_t len);
-
-#endif // _PROXMARK_CMD_H_
-
diff --git a/common/usb_cdc.c b/common/usb_cdc.c
deleted file mode 100644
index d33bca7b..00000000
--- a/common/usb_cdc.c
+++ /dev/null
@@ -1,661 +0,0 @@
-/*
- * at91sam7s USB CDC device implementation
- *
- * Copyright (c) 2012, Roel Verdult
- * All rights reserved.
- *
- * Redistribution and use in source and binary forms, with or without
- * modification, are permitted provided that the following conditions are met:
- * 1. Redistributions of source code must retain the above copyright
- * notice, this list of conditions and the following disclaimer.
- * 2. Redistributions in binary form must reproduce the above copyright
- * notice, this list of conditions and the following disclaimer in the
- * documentation and/or other materials provided with the distribution.
- * 3. Neither the name of the copyright holders nor the
- * names of its contributors may be used to endorse or promote products
- * derived from this software without specific prior written permission.
- *
- * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS ''AS IS'' AND ANY
- * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
- * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
- * DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDERS BE LIABLE FOR ANY
- * DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
- * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
- * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
- * ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
- * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
- * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
- *
- * based on the "Basic USB Example" from ATMEL (doc6123.pdf)
- *
- * @file usb_cdc.c
- * @brief
- */
-
-#include "usb_cdc.h"
-#include "at91sam7s512.h"
-#include "config_gpio.h"
-
-
-#define AT91C_EP_CONTROL     0
-#define AT91C_EP_OUT         1
-#define AT91C_EP_IN          2
-#define AT91C_EP_NOTIFY      3
-#define AT91C_EP_OUT_SIZE 0x40
-#define AT91C_EP_IN_SIZE  0x40
-
-// Language must always be 0.
-#define STR_LANGUAGE_CODES 0x00
-#define STR_MANUFACTURER   0x01
-#define STR_PRODUCT        0x02
-
-static const char devDescriptor[] = {
-	/* Device descriptor */
-	0x12,      // bLength
-	0x01,      // bDescriptorType
-	0x00,0x02, // Complies with USB Spec. Release (0200h = release 2.0)
-	0x02,      // bDeviceClass:    (Communication Device Class)
-	0x00,      // bDeviceSubclass: (unused at this time)
-	0x00,      // bDeviceProtocol: (unused at this time)
-	0x08,      // bMaxPacketSize0
-	0xc4,0x9a, // Vendor ID (0x9ac4 = J. Westhues)
-	0x8f,0x4b, // Product ID (0x4b8f = Proxmark-3 RFID Instrument)
-	0x01,0x00, // Device release number (0001)
-	STR_MANUFACTURER,  // iManufacturer
-	STR_PRODUCT,       // iProduct
-	0x00,      // iSerialNumber
-	0x01       // bNumConfigs
-};
-
-static const char cfgDescriptor[] = {
-	/* ============== CONFIGURATION 1 =========== */
-	/* Configuration 1 descriptor */
-	0x09,   // CbLength
-	0x02,   // CbDescriptorType
-	0x43,   // CwTotalLength 2 EP + Control
-	0x00,
-	0x02,   // CbNumInterfaces
-	0x01,   // CbConfigurationValue
-	0x00,   // CiConfiguration
-	0x80,   // CbmAttributes (Bus Powered)
-	0x4B,   // CMaxPower (150mA max current drawn from bus)
-
-	/* Interface 0 Descriptor: Communication Class Interface */
-	0x09, // bLength
-	0x04, // bDescriptorType
-	0x00, // bInterfaceNumber
-	0x00, // bAlternateSetting
-	0x01, // bNumEndpoints
-	0x02, // bInterfaceClass:       Communication Interface Class
-	0x02, // bInterfaceSubclass:    Abstract Control Model
-	0x01, // bInterfaceProtocol:    Common AT Commands, V.25ter
-	0x00, // iInterface
-
-	/* Header Functional Descriptor */
-	0x05, // bFunction Length
-	0x24, // bDescriptor type:      CS_INTERFACE
-	0x00, // bDescriptor subtype:   Header Functional Descriptor
-	0x10, // bcdCDC:1.1
-	0x01,
-
-	/* ACM Functional Descriptor */
-	0x04, // bFunctionLength
-	0x24, // bDescriptor Type:      CS_INTERFACE
-	0x02, // bDescriptor Subtype:   Abstract Control Management Functional Descriptor
-	0x02, // bmCapabilities:        D1: Device supports the request combination of Set_Line_Coding, Set_Control_Line_State, Get_Line_Coding, and the notification Serial_State
-
-	/* Union Functional Descriptor */
-	0x05, // bFunctionLength
-	0x24, // bDescriptorType:       CS_INTERFACE
-	0x06, // bDescriptor Subtype:   Union Functional Descriptor
-	0x00, // bMasterInterface:      Communication Class Interface
-	0x01, // bSlaveInterface0:      Data Class Interface
-
-	/* Call Management Functional Descriptor */
-	0x05, // bFunctionLength
-	0x24, // bDescriptor Type:      CS_INTERFACE
-	0x01, // bDescriptor Subtype:   Call Management Functional Descriptor
-	0x00, // bmCapabilities:        Device sends/receives call management information only over the Communication Class interface. Device does not handle call management itself
-	0x01, // bDataInterface:        Data Class Interface 1
-
-	/* Endpoint 1 descriptor */
-	0x07,   // bLength
-	0x05,   // bDescriptorType
-	0x83,   // bEndpointAddress:    Endpoint 03 - IN
-	0x03,   // bmAttributes:        INT
-	0x08,   // wMaxPacketSize:      8
-	0x00,
-	0xFF,   // bInterval
-
-	/* Interface 1 Descriptor: Data Class Interface */
-	0x09, // bLength
-	0x04, // bDescriptorType
-	0x01, // bInterfaceNumber
-	0x00, // bAlternateSetting
-	0x02, // bNumEndpoints
-	0x0A, // bInterfaceClass:       Data Interface Class
-	0x00, // bInterfaceSubclass:    not used
-	0x00, // bInterfaceProtocol:    No class specific protocol required)
-	0x00, // iInterface
-
-	/* Endpoint 1 descriptor */
-	0x07,   // bLength
-	0x05,   // bDescriptorType
-	0x01,   // bEndpointAddress:    Endpoint 01 - OUT
-	0x02,   // bmAttributes:        BULK
-	AT91C_EP_OUT_SIZE, // wMaxPacketSize
-	0x00,
-	0x00,   // bInterval
-
-	/* Endpoint 2 descriptor */
-	0x07,   // bLength
-	0x05,   // bDescriptorType
-	0x82,   // bEndpointAddress:    Endpoint 02 - IN
-	0x02,   // bmAttributes:        BULK
-	AT91C_EP_IN_SIZE,   // wMaxPacketSize
-	0x00,
-	0x00    // bInterval
-};
-
-static const char StrDescLanguageCodes[] = {
-  4,			// Length
-  0x03,			// Type is string
-  0x09, 0x04	// supported language Code 0 = 0x0409 (English)
-};
-
-// Note: ModemManager (Linux) ignores Proxmark3 devices by matching the
-// manufacturer string "proxmark.org". Don't change this.
-static const char StrDescManufacturer[] = {
-  26,			// Length
-  0x03,			// Type is string
-  'p', 0x00,
-  'r', 0x00,
-  'o', 0x00,
-  'x', 0x00,
-  'm', 0x00,
-  'a', 0x00,
-  'r', 0x00,
-  'k', 0x00,
-  '.', 0x00,
-  'o', 0x00,
-  'r', 0x00,
-  'g', 0x00
-};
-
-static const char StrDescProduct[] = {
-  20,			// Length
-  0x03,			// Type is string
-  'p', 0x00,
-  'r', 0x00,
-  'o', 0x00,
-  'x', 0x00,
-  'm', 0x00,
-  'a', 0x00,
-  'r', 0x00,
-  'k', 0x00,
-  '3', 0x00
-};
-
-const char* getStringDescriptor(uint8_t idx)
-{
-	switch (idx) {
-		case STR_LANGUAGE_CODES:
-			return StrDescLanguageCodes;
-		case STR_MANUFACTURER:
-			return StrDescManufacturer;
-		case STR_PRODUCT:
-			return StrDescProduct;
-		default:
-			return NULL;
-	}
-}
-
-// Bitmap for all status bits in CSR which must be written as 1 to cause no effect
-#define REG_NO_EFFECT_1_ALL      AT91C_UDP_RX_DATA_BK0 | AT91C_UDP_RX_DATA_BK1 \
-                                |AT91C_UDP_STALLSENT   | AT91C_UDP_RXSETUP \
-                                |AT91C_UDP_TXCOMP
-
-// Clear flags in the UDP_CSR register
-#define UDP_CLEAR_EP_FLAGS(endpoint, flags) { \
-	volatile unsigned int reg; \
-	reg = pUdp->UDP_CSR[(endpoint)]; \
-	reg |= REG_NO_EFFECT_1_ALL; \
-	reg &= ~(flags); \
-	pUdp->UDP_CSR[(endpoint)] = reg; \
-} 
-
-// Set flags in the UDP_CSR register
-#define UDP_SET_EP_FLAGS(endpoint, flags) { \
-	volatile unsigned int reg; \
-	reg = pUdp->UDP_CSR[(endpoint)]; \
-	reg |= REG_NO_EFFECT_1_ALL; \
-	reg |= (flags); \
-	pUdp->UDP_CSR[(endpoint)] = reg; \
-}
-
-/* USB standard request codes */
-#define STD_GET_STATUS_ZERO           0x0080
-#define STD_GET_STATUS_INTERFACE      0x0081
-#define STD_GET_STATUS_ENDPOINT       0x0082
-
-#define STD_CLEAR_FEATURE_ZERO        0x0100
-#define STD_CLEAR_FEATURE_INTERFACE   0x0101
-#define STD_CLEAR_FEATURE_ENDPOINT    0x0102
-
-#define STD_SET_FEATURE_ZERO          0x0300
-#define STD_SET_FEATURE_INTERFACE     0x0301
-#define STD_SET_FEATURE_ENDPOINT      0x0302
-
-#define STD_SET_ADDRESS               0x0500
-#define STD_GET_DESCRIPTOR            0x0680
-#define STD_SET_DESCRIPTOR            0x0700
-#define STD_GET_CONFIGURATION         0x0880
-#define STD_SET_CONFIGURATION         0x0900
-#define STD_GET_INTERFACE             0x0A81
-#define STD_SET_INTERFACE             0x0B01
-#define STD_SYNCH_FRAME               0x0C82
-
-/* CDC Class Specific Request Code */
-#define GET_LINE_CODING               0x21A1
-#define SET_LINE_CODING               0x2021
-#define SET_CONTROL_LINE_STATE        0x2221
-
-typedef struct {
-	unsigned int dwDTERRate;
-	char bCharFormat;
-	char bParityType;
-	char bDataBits;
-} AT91S_CDC_LINE_CODING, *AT91PS_CDC_LINE_CODING;
-
-AT91S_CDC_LINE_CODING line = {
-	115200, // baudrate
-	0,      // 1 Stop Bit
-	0,      // None Parity
-	8};     // 8 Data bits
-
-
-void AT91F_CDC_Enumerate();
-
-AT91PS_UDP pUdp = AT91C_BASE_UDP;
-byte_t btConfiguration = 0;
-byte_t btConnection    = 0;
-byte_t btReceiveBank   = AT91C_UDP_RX_DATA_BK0;
-
-
-//*----------------------------------------------------------------------------
-//* \fn    usb_disable
-//* \brief This function deactivates the USB device
-//*----------------------------------------------------------------------------
-void usb_disable() {
-	// Disconnect the USB device
-	AT91C_BASE_PIOA->PIO_ODR = GPIO_USB_PU;
-
-	// Clear all lingering interrupts
-	if(pUdp->UDP_ISR & AT91C_UDP_ENDBUSRES) {
-		pUdp->UDP_ICR = AT91C_UDP_ENDBUSRES;
-	}
-}
-
-
-//*----------------------------------------------------------------------------
-//* \fn    usb_enable
-//* \brief This function Activates the USB device
-//*----------------------------------------------------------------------------
-void usb_enable() {
-	// Set the PLL USB Divider
-	AT91C_BASE_CKGR->CKGR_PLLR |= AT91C_CKGR_USBDIV_1 ;
-
-	// Specific Chip USB Initialisation
-	// Enables the 48MHz USB clock UDPCK and System Peripheral USB Clock
-	AT91C_BASE_PMC->PMC_SCER = AT91C_PMC_UDP;
-	AT91C_BASE_PMC->PMC_PCER = (1 << AT91C_ID_UDP);
-
-	// Enable UDP PullUp (USB_DP_PUP) : enable & Clear of the corresponding PIO
-	// Set in PIO mode and Configure in Output
-	AT91C_BASE_PIOA->PIO_PER = GPIO_USB_PU; // Set in PIO mode
-	AT91C_BASE_PIOA->PIO_OER = GPIO_USB_PU; // Configure as Output
-
-	// Clear for set the Pullup resistor
-	AT91C_BASE_PIOA->PIO_CODR = GPIO_USB_PU;
-
-	// Disconnect and reconnect USB controller for 100ms
-	usb_disable();
-
-	// Wait for a short while
-	for (volatile size_t i=0; i<0x100000; i++);
-
-	// Reconnect USB reconnect
-	AT91C_BASE_PIOA->PIO_SODR = GPIO_USB_PU;
-	AT91C_BASE_PIOA->PIO_OER = GPIO_USB_PU;
-}
-
-
-//*----------------------------------------------------------------------------
-//* \fn    usb_check
-//* \brief Test if the device is configured and handle enumeration
-//*----------------------------------------------------------------------------
-bool usb_check() {
-	AT91_REG isr = pUdp->UDP_ISR;
-
-	if (isr & AT91C_UDP_ENDBUSRES) {
-		pUdp->UDP_ICR = AT91C_UDP_ENDBUSRES;
-		// reset all endpoints
-		pUdp->UDP_RSTEP  = (unsigned int)-1;
-		pUdp->UDP_RSTEP  = 0;
-		// Enable the function
-		pUdp->UDP_FADDR = AT91C_UDP_FEN;
-		// Configure endpoint 0
-		pUdp->UDP_CSR[AT91C_EP_CONTROL] = (AT91C_UDP_EPEDS | AT91C_UDP_EPTYPE_CTRL);
-	} else if (isr & AT91C_UDP_EPINT0) {
-		pUdp->UDP_ICR = AT91C_UDP_EPINT0;
-		AT91F_CDC_Enumerate();
-	}
-	return (btConfiguration) ? true : false;
-}
-
-
-bool usb_poll()
-{
-	if (!usb_check()) return false;
-	return (pUdp->UDP_CSR[AT91C_EP_OUT] & btReceiveBank);
-}
-
-
-/**
-	In github PR #129, some users appears to get a false positive from
-	usb_poll, which returns true, but the usb_read operation
-	still returns 0.
-	This check is basically the same as above, but also checks
-	that the length available to read is non-zero, thus hopefully fixes the
-	bug.
-**/
-bool usb_poll_validate_length()
-{
-	if (!usb_check()) return false;
-	if (!(pUdp->UDP_CSR[AT91C_EP_OUT] & btReceiveBank)) return false;
-	return (pUdp->UDP_CSR[AT91C_EP_OUT] >> 16) >  0;
-}
-
-//*----------------------------------------------------------------------------
-//* \fn    usb_read
-//* \brief Read available data from Endpoint OUT
-//*----------------------------------------------------------------------------
-uint32_t usb_read(byte_t* data, size_t len) {
-	byte_t bank = btReceiveBank;
-	uint32_t packetSize, nbBytesRcv = 0;
-	uint32_t time_out = 0;
-  
-	while (len)  {
-		if (!usb_check()) break;
-
-		if ( pUdp->UDP_CSR[AT91C_EP_OUT] & bank ) {
-			packetSize = MIN(pUdp->UDP_CSR[AT91C_EP_OUT] >> 16, len);
-			len -= packetSize;
-			while(packetSize--)
-				data[nbBytesRcv++] = pUdp->UDP_FDR[AT91C_EP_OUT];
-			UDP_CLEAR_EP_FLAGS(AT91C_EP_OUT, bank);
-			if (bank == AT91C_UDP_RX_DATA_BK0) {
-				bank = AT91C_UDP_RX_DATA_BK1;
-			} else {
-				bank = AT91C_UDP_RX_DATA_BK0;
-			}
-		}
-		if (time_out++ == 0x1fff) break;
-	}
-
-	btReceiveBank = bank;
-	return nbBytesRcv;
-}
-
-
-//*----------------------------------------------------------------------------
-//* \fn    usb_write
-//* \brief Send through endpoint 2
-//*----------------------------------------------------------------------------
-uint32_t usb_write(const byte_t* data, const size_t len) {
-	size_t length = len;
-	uint32_t cpt = 0;
-
-	if (!length) return 0;
-	if (!usb_check()) return 0;
-
-	// Send the first packet
-	cpt = MIN(length, AT91C_EP_IN_SIZE);
-	length -= cpt;
-	while (cpt--) {
-		pUdp->UDP_FDR[AT91C_EP_IN] = *data++;
-	}
-	UDP_SET_EP_FLAGS(AT91C_EP_IN, AT91C_UDP_TXPKTRDY);
-
-	while (length) {
-		// Fill the next bank
-		cpt = MIN(length, AT91C_EP_IN_SIZE);
-		length -= cpt;
-		while (cpt--) {
-			pUdp->UDP_FDR[AT91C_EP_IN] = *data++;
-		}
-		// Wait for the previous bank to be sent
-		while (!(pUdp->UDP_CSR[AT91C_EP_IN] & AT91C_UDP_TXCOMP)) {
-			if (!usb_check()) return length;
-		}
-		UDP_CLEAR_EP_FLAGS(AT91C_EP_IN, AT91C_UDP_TXCOMP);
-		while (pUdp->UDP_CSR[AT91C_EP_IN] & AT91C_UDP_TXCOMP);
-		UDP_SET_EP_FLAGS(AT91C_EP_IN, AT91C_UDP_TXPKTRDY);
-	}
-
-	// Wait for the end of transfer
-	while (!(pUdp->UDP_CSR[AT91C_EP_IN] & AT91C_UDP_TXCOMP)) {
-		if (!usb_check()) return length;
-	}
-
-	UDP_CLEAR_EP_FLAGS(AT91C_EP_IN, AT91C_UDP_TXCOMP);
-	while (pUdp->UDP_CSR[AT91C_EP_IN] & AT91C_UDP_TXCOMP);
-
-	return length;
-}
-
-
-//*----------------------------------------------------------------------------
-//* \fn    AT91F_USB_SendData
-//* \brief Send Data through the control endpoint
-//*----------------------------------------------------------------------------
-unsigned int csrTab[100] = {0x00};
-unsigned char csrIdx = 0;
-
-static void AT91F_USB_SendData(AT91PS_UDP pUdp, const char *pData, uint32_t length) {
-	uint32_t cpt = 0;
-	AT91_REG csr;
-
-	do {
-		cpt = MIN(length, 8);
-		length -= cpt;
-
-		while (cpt--)
-			pUdp->UDP_FDR[0] = *pData++;
-
-		if (pUdp->UDP_CSR[AT91C_EP_CONTROL] & AT91C_UDP_TXCOMP) {
-			UDP_CLEAR_EP_FLAGS(AT91C_EP_CONTROL, AT91C_UDP_TXCOMP);
-			while (pUdp->UDP_CSR[AT91C_EP_CONTROL] & AT91C_UDP_TXCOMP);
-		}
-
-		UDP_SET_EP_FLAGS(AT91C_EP_CONTROL, AT91C_UDP_TXPKTRDY);
-		do {
-			csr = pUdp->UDP_CSR[AT91C_EP_CONTROL];
-
-			// Data IN stage has been stopped by a status OUT
-			if (csr & AT91C_UDP_RX_DATA_BK0) {
-				UDP_CLEAR_EP_FLAGS(AT91C_EP_CONTROL, AT91C_UDP_RX_DATA_BK0);
-				return;
-			}
-		} while ( !(csr & AT91C_UDP_TXCOMP) );
-
-	} while (length);
-
-	if (pUdp->UDP_CSR[AT91C_EP_CONTROL] & AT91C_UDP_TXCOMP) {
-		UDP_CLEAR_EP_FLAGS(AT91C_EP_CONTROL, AT91C_UDP_TXCOMP);
-		while (pUdp->UDP_CSR[AT91C_EP_CONTROL] & AT91C_UDP_TXCOMP);
-	}
-}
-
-
-//*----------------------------------------------------------------------------
-//* \fn    AT91F_USB_SendZlp
-//* \brief Send zero length packet through the control endpoint
-//*----------------------------------------------------------------------------
-void AT91F_USB_SendZlp(AT91PS_UDP pUdp) {
-	UDP_SET_EP_FLAGS(AT91C_EP_CONTROL, AT91C_UDP_TXPKTRDY);
-	while ( !(pUdp->UDP_CSR[AT91C_EP_CONTROL] & AT91C_UDP_TXCOMP) );
-	UDP_CLEAR_EP_FLAGS(AT91C_EP_CONTROL, AT91C_UDP_TXCOMP);
-	while (pUdp->UDP_CSR[AT91C_EP_CONTROL] & AT91C_UDP_TXCOMP);
-}
-
-
-//*----------------------------------------------------------------------------
-//* \fn    AT91F_USB_SendStall
-//* \brief Stall the control endpoint
-//*----------------------------------------------------------------------------
-void AT91F_USB_SendStall(AT91PS_UDP pUdp) {
-	UDP_SET_EP_FLAGS(AT91C_EP_CONTROL, AT91C_UDP_FORCESTALL);
-	while ( !(pUdp->UDP_CSR[AT91C_EP_CONTROL] & AT91C_UDP_ISOERROR) );
-	UDP_CLEAR_EP_FLAGS(AT91C_EP_CONTROL, AT91C_UDP_FORCESTALL | AT91C_UDP_ISOERROR);
-	while (pUdp->UDP_CSR[AT91C_EP_CONTROL] & (AT91C_UDP_FORCESTALL | AT91C_UDP_ISOERROR));
-}
-
-
-//*----------------------------------------------------------------------------
-//* \fn    AT91F_CDC_Enumerate
-//* \brief This function is a callback invoked when a SETUP packet is received
-//*----------------------------------------------------------------------------
-void AT91F_CDC_Enumerate() {
-	byte_t bmRequestType, bRequest;
-	uint16_t wValue, wIndex, wLength, wStatus;
-
-	if ( !(pUdp->UDP_CSR[AT91C_EP_CONTROL] & AT91C_UDP_RXSETUP) )
-		return;
-
-	bmRequestType = pUdp->UDP_FDR[AT91C_EP_CONTROL];
-	bRequest      = pUdp->UDP_FDR[AT91C_EP_CONTROL];
-	wValue        = (pUdp->UDP_FDR[AT91C_EP_CONTROL] & 0xFF);
-	wValue       |= (pUdp->UDP_FDR[AT91C_EP_CONTROL] << 8);
-	wIndex        = (pUdp->UDP_FDR[AT91C_EP_CONTROL] & 0xFF);
-	wIndex       |= (pUdp->UDP_FDR[AT91C_EP_CONTROL] << 8);
-	wLength       = (pUdp->UDP_FDR[AT91C_EP_CONTROL] & 0xFF);
-	wLength      |= (pUdp->UDP_FDR[AT91C_EP_CONTROL] << 8);
-
-	if (bmRequestType & 0x80) {	// Data Phase Transfer Direction Device to Host
-		UDP_SET_EP_FLAGS(AT91C_EP_CONTROL, AT91C_UDP_DIR);
-		while ( !(pUdp->UDP_CSR[AT91C_EP_CONTROL] & AT91C_UDP_DIR) );
-	}
-	UDP_CLEAR_EP_FLAGS(AT91C_EP_CONTROL, AT91C_UDP_RXSETUP);
-	while ( (pUdp->UDP_CSR[AT91C_EP_CONTROL] & AT91C_UDP_RXSETUP)  );
-
-	// Handle supported standard device request Cf Table 9-3 in USB specification Rev 1.1
-	switch ((bRequest << 8) | bmRequestType) {
-	case STD_GET_DESCRIPTOR:
-		if (wValue == 0x100)       // Return Device Descriptor
-			AT91F_USB_SendData(pUdp, devDescriptor, MIN(sizeof(devDescriptor), wLength));
-		else if (wValue == 0x200)  // Return Configuration Descriptor
-			AT91F_USB_SendData(pUdp, cfgDescriptor, MIN(sizeof(cfgDescriptor), wLength));
-		else if ((wValue & 0xF00) == 0x300) { // Return String Descriptor
-			const char *strDescriptor = getStringDescriptor(wValue & 0xff);
-			if (strDescriptor != NULL) {
-				AT91F_USB_SendData(pUdp, strDescriptor, MIN(strDescriptor[0], wLength));
-			} else {
-				AT91F_USB_SendStall(pUdp);
-			}
-		}
-		else
-			AT91F_USB_SendStall(pUdp);
-		break;
-	case STD_SET_ADDRESS:
-		AT91F_USB_SendZlp(pUdp);
-		pUdp->UDP_FADDR = (AT91C_UDP_FEN | wValue);
-		pUdp->UDP_GLBSTATE  = (wValue) ? AT91C_UDP_FADDEN : 0;
-		break;
-	case STD_SET_CONFIGURATION:
-		btConfiguration = wValue;
-		AT91F_USB_SendZlp(pUdp);
-		pUdp->UDP_GLBSTATE  = (wValue) ? AT91C_UDP_CONFG : AT91C_UDP_FADDEN;
-		pUdp->UDP_CSR[AT91C_EP_OUT]    = (wValue) ? (AT91C_UDP_EPEDS | AT91C_UDP_EPTYPE_BULK_OUT) : 0;
-		pUdp->UDP_CSR[AT91C_EP_IN]     = (wValue) ? (AT91C_UDP_EPEDS | AT91C_UDP_EPTYPE_BULK_IN)  : 0;
-		pUdp->UDP_CSR[AT91C_EP_NOTIFY] = (wValue) ? (AT91C_UDP_EPEDS | AT91C_UDP_EPTYPE_INT_IN)   : 0;
-		break;
-	case STD_GET_CONFIGURATION:
-		AT91F_USB_SendData(pUdp, (char *) &(btConfiguration), sizeof(btConfiguration));
-		break;
-	case STD_GET_STATUS_ZERO:
-		wStatus = 0;	// Device is Bus powered, remote wakeup disabled
-		AT91F_USB_SendData(pUdp, (char *) &wStatus, sizeof(wStatus));
-		break;
-	case STD_GET_STATUS_INTERFACE:
-		wStatus = 0; 	// reserved for future use
-		AT91F_USB_SendData(pUdp, (char *) &wStatus, sizeof(wStatus));
-		break;
-	case STD_GET_STATUS_ENDPOINT:
-		wStatus = 0;
-		wIndex &= 0x0F;
-		if ((pUdp->UDP_GLBSTATE & AT91C_UDP_CONFG) && (wIndex <= AT91C_EP_NOTIFY)) {
-			wStatus = (pUdp->UDP_CSR[wIndex] & AT91C_UDP_EPEDS) ? 0 : 1;
-			AT91F_USB_SendData(pUdp, (char *) &wStatus, sizeof(wStatus));
-		}
-		else if ((pUdp->UDP_GLBSTATE & AT91C_UDP_FADDEN) && (wIndex == AT91C_EP_CONTROL)) {
-			wStatus = (pUdp->UDP_CSR[wIndex] & AT91C_UDP_EPEDS) ? 0 : 1;
-			AT91F_USB_SendData(pUdp, (char *) &wStatus, sizeof(wStatus));
-		}
-		else
-			AT91F_USB_SendStall(pUdp);
-		break;
-	case STD_SET_FEATURE_ZERO:
-		AT91F_USB_SendStall(pUdp);
-	    break;
-	case STD_SET_FEATURE_INTERFACE:
-		AT91F_USB_SendZlp(pUdp);
-		break;
-	case STD_SET_FEATURE_ENDPOINT:
-		wIndex &= 0x0F;
-		if ((wValue == 0) && (wIndex >= AT91C_EP_OUT) && (wIndex <= AT91C_EP_NOTIFY)) {
-			pUdp->UDP_CSR[wIndex] = 0;
-			AT91F_USB_SendZlp(pUdp);
-		}
-		else
-			AT91F_USB_SendStall(pUdp);
-		break;
-	case STD_CLEAR_FEATURE_ZERO:
-		AT91F_USB_SendStall(pUdp);
-	    break;
-	case STD_CLEAR_FEATURE_INTERFACE:
-		AT91F_USB_SendZlp(pUdp);
-		break;
-	case STD_CLEAR_FEATURE_ENDPOINT:
-		wIndex &= 0x0F;
-		if ((wValue == 0) && (wIndex >= AT91C_EP_OUT) && (wIndex <= AT91C_EP_NOTIFY)) {
-			if (wIndex == AT91C_EP_OUT)
-				pUdp->UDP_CSR[AT91C_EP_OUT] = (AT91C_UDP_EPEDS | AT91C_UDP_EPTYPE_BULK_OUT);
-			else if (wIndex == AT91C_EP_IN)
-				pUdp->UDP_CSR[AT91C_EP_IN] = (AT91C_UDP_EPEDS | AT91C_UDP_EPTYPE_BULK_IN);
-			else if (wIndex == AT91C_EP_NOTIFY)
-				pUdp->UDP_CSR[AT91C_EP_NOTIFY] = (AT91C_UDP_EPEDS | AT91C_UDP_EPTYPE_INT_IN);
-			AT91F_USB_SendZlp(pUdp);
-		}
-		else
-			AT91F_USB_SendStall(pUdp);
-		break;
-
-	// handle CDC class requests
-	case SET_LINE_CODING:
-		while ( !(pUdp->UDP_CSR[AT91C_EP_CONTROL] & AT91C_UDP_RX_DATA_BK0) );
-		UDP_CLEAR_EP_FLAGS(AT91C_EP_CONTROL, AT91C_UDP_RX_DATA_BK0);
-		AT91F_USB_SendZlp(pUdp);
-		break;
-	case GET_LINE_CODING:
-		AT91F_USB_SendData(pUdp, (char *) &line, MIN(sizeof(line), wLength));
-		break;
-	case SET_CONTROL_LINE_STATE:
-		btConnection = wValue;
-		AT91F_USB_SendZlp(pUdp);
-		break;
-	default:
-		AT91F_USB_SendStall(pUdp);
-	    break;
-	}
-}
diff --git a/common/usb_cdc.h b/common/usb_cdc.h
deleted file mode 100644
index c42da8db..00000000
--- a/common/usb_cdc.h
+++ /dev/null
@@ -1,49 +0,0 @@
-/*
- * at91sam7s USB CDC device implementation
- *
- * Copyright (c) 2012, Roel Verdult
- * All rights reserved.
- *
- * Redistribution and use in source and binary forms, with or without
- * modification, are permitted provided that the following conditions are met:
- * 1. Redistributions of source code must retain the above copyright
- * notice, this list of conditions and the following disclaimer.
- * 2. Redistributions in binary form must reproduce the above copyright
- * notice, this list of conditions and the following disclaimer in the
- * documentation and/or other materials provided with the distribution.
- * 3. Neither the name of the copyright holders nor the
- * names of its contributors may be used to endorse or promote products
- * derived from this software without specific prior written permission.
- *
- * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS ''AS IS'' AND ANY
- * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
- * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
- * DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDERS BE LIABLE FOR ANY
- * DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
- * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
- * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
- * ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
- * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
- * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
- *
- * based on the "Basic USB Example" from ATMEL (doc6123.pdf)
- *
- * @file usb_cdc.c
- * @brief
- */
-
-#ifndef _USB_CDC_H_
-#define _USB_CDC_H_
-
-#include "common.h"
-
-void usb_disable();
-void usb_enable();
-bool usb_check();
-bool usb_poll();
-bool usb_poll_validate_length();
-uint32_t usb_read(byte_t* data, size_t len);
-uint32_t usb_write(const byte_t* data, const size_t len);
-
-#endif // _USB_CDC_H_
-
diff --git a/include/common.h b/include/common.h
index 998db64d..89a6cd7e 100644
--- a/include/common.h
+++ b/include/common.h
@@ -9,13 +9,9 @@
 // Interlib Definitions
 //-----------------------------------------------------------------------------
 
-#ifndef __COMMON_H
-#define __COMMON_H
+#ifndef COMMON_H__
+#define COMMON_H__
 
-#include <stddef.h>
-#include <stdint.h>
-#include <stdbool.h>
-#include <at91sam7s512.h>
 typedef unsigned char byte_t;
 
 #ifndef MIN
@@ -25,10 +21,9 @@ typedef unsigned char byte_t;
 # define MAX(a, b) (((a) > (b)) ? (a) : (b))
 #endif
 #ifndef ABS
-# define ABS(a) ( ((a)<0) ? -(a) : (a) )
+# define ABS(a) (((a) < 0) ? -(a) : (a))
 #endif
 
-
 #define RAMFUNC __attribute((long_call, section(".ramfunc")))
 
 #endif
diff --git a/include/usb_cmd.h b/include/usb_cmd.h
index c588328c..082b7d50 100644
--- a/include/usb_cmd.h
+++ b/include/usb_cmd.h
@@ -10,13 +10,13 @@
 // own protocol.
 //-----------------------------------------------------------------------------
 
-#ifndef __USB_CMD_H
-#define __USB_CMD_H
+#ifndef USB_CMD_H__
+#define USB_CMD_H__
+
 #ifdef _MSC_VER
 typedef DWORD uint32_t;
 typedef BYTE uint8_t;
 #define PACKED
-// stuff
 #else
 #include <stdint.h>
 #include <stdbool.h>
@@ -26,16 +26,17 @@ typedef BYTE uint8_t;
 #define USB_CMD_DATA_SIZE 512
 
 typedef struct {
-  uint64_t cmd;
-  uint64_t arg[3];
-  union {
-    uint8_t  asBytes[USB_CMD_DATA_SIZE];
-    uint32_t asDwords[USB_CMD_DATA_SIZE/4];
-  } d;
+	uint64_t cmd;
+	uint64_t arg[3];
+	union {
+		uint8_t  asBytes[USB_CMD_DATA_SIZE];
+		uint32_t asDwords[USB_CMD_DATA_SIZE/4];
+	} d;
 } PACKED UsbCommand;
 
+
 // A struct used to send sample-configs over USB
-typedef struct{
+typedef struct {
 	uint8_t decimation;
 	uint8_t bits_per_sample;
 	bool averaging;
@@ -44,6 +45,7 @@ typedef struct{
 	int samples_to_skip;
 } sample_config;
 
+
 // For the bootloader
 #define CMD_DEVICE_INFO                                                   0x0000
 #define CMD_SETUP_WRITE                                                   0x0001
@@ -165,7 +167,7 @@ typedef struct{
 #define CMD_ICLASS_WRITEBLOCK                                             0x0397
 #define CMD_ICLASS_EML_MEMSET                                             0x0398
 #define CMD_ICLASS_CHECK                                                  0x0399
-#define CMD_ICLASS_READCHECK                                              0x039A                                         
+#define CMD_ICLASS_READCHECK                                              0x039A
 
 // For measurements of the antenna tuning
 #define CMD_MEASURE_ANTENNA_TUNING                                        0x0400
@@ -208,7 +210,7 @@ typedef struct{
 #define CMD_MIFAREU_WRITEBL                                               0x0722
 #define CMD_MIFAREU_WRITEBL_COMPAT                                        0x0723
 #define CMD_MIFAREUC_AUTH                                                 0x0724
-//0x0725 and 0x0726 no longer used 
+//0x0725 and 0x0726 no longer used
 #define CMD_MIFAREUC_SETPWD                                               0x0727
 
 
@@ -228,11 +230,11 @@ typedef struct{
 
 
 // Mifare simulation flags
-#define FLAG_INTERACTIVE                (1<<0)
-#define FLAG_4B_UID_IN_DATA             (1<<1)
-#define FLAG_7B_UID_IN_DATA             (1<<2)
-#define FLAG_NR_AR_ATTACK               (1<<4)
-#define FLAG_RANDOM_NONCE               (1<<5)
+#define FLAG_INTERACTIVE                 (1<<0)
+#define FLAG_4B_UID_IN_DATA              (1<<1)
+#define FLAG_7B_UID_IN_DATA              (1<<2)
+#define FLAG_NR_AR_ATTACK                (1<<4)
+#define FLAG_RANDOM_NONCE                (1<<5)
 
 
 // iCLASS reader flags
@@ -266,19 +268,19 @@ typedef struct{
 
 // CMD_DEVICE_INFO response packet has flags in arg[0], flag definitions:
 /* Whether a bootloader that understands the common_area is present */
-#define DEVICE_INFO_FLAG_BOOTROM_PRESENT         	(1<<0)
+#define DEVICE_INFO_FLAG_BOOTROM_PRESENT            (1<<0)
 
 /* Whether a osimage that understands the common_area is present */
-#define DEVICE_INFO_FLAG_OSIMAGE_PRESENT         	(1<<1)
+#define DEVICE_INFO_FLAG_OSIMAGE_PRESENT            (1<<1)
 
 /* Set if the bootloader is currently executing */
-#define DEVICE_INFO_FLAG_CURRENT_MODE_BOOTROM    	(1<<2)
+#define DEVICE_INFO_FLAG_CURRENT_MODE_BOOTROM       (1<<2)
 
 /* Set if the OS is currently executing */
-#define DEVICE_INFO_FLAG_CURRENT_MODE_OS         	(1<<3)
+#define DEVICE_INFO_FLAG_CURRENT_MODE_OS            (1<<3)
 
 /* Set if this device understands the extend start flash command */
-#define DEVICE_INFO_FLAG_UNDERSTANDS_START_FLASH 	(1<<4)
+#define DEVICE_INFO_FLAG_UNDERSTANDS_START_FLASH    (1<<4)
 
 /* CMD_START_FLASH may have three arguments: start of area to flash,
    end of area to flash, optional magic.