Code improved for less memory

[proxmark3-svn] / armsrc / hfsnoop.c

diff --git a/armsrc/hfsnoop.c b/armsrc/hfsnoop.c
index b7d69013708edfb0b9cc20170646e47aa60a769f..755ac0ccc79c3bb0ba27401873d40ab6caf9f149 100644 (file)
--- a/armsrc/hfsnoop.c
+++ b/armsrc/hfsnoop.c
@@ -1,13 +1,25 @@
+//-----------------------------------------------------------------------------
+// piwi, 2019
+//
+// This code is licensed to you under the terms of the GNU GPL, version 2 or,
+// at your option, any later version. See the LICENSE.txt file for the text of
+// the license.
+//-----------------------------------------------------------------------------
+// Routines to get sample data from FPGA.
+//-----------------------------------------------------------------------------
+
+#include "hfsnoop.h"
+
 #include "proxmark3.h"
-#include "apps.h"
 #include "BigBuf.h"
 #include "util.h"
-
-static void RAMFUNC optimizedSnoop(void);
+#include "apps.h"
+#include "usb_cdc.h"   // for usb_poll_validate_length
+#include "fpga.h"
+#include "fpgaloader.h"
 
 static void RAMFUNC optimizedSnoop(void)
 {
-       BigBuf_free();
        int n = BigBuf_max_traceLen() / sizeof(uint16_t); // take all memory
 
        uint16_t *dest = (uint16_t *)BigBuf_get_addr();
@@ -20,7 +32,7 @@ static void RAMFUNC optimizedSnoop(void)
                if(AT91C_BASE_SSC->SSC_SR & AT91C_SSC_RXRDY)
                {
                        *dest = (uint16_t)(AT91C_BASE_SSC->SSC_RHR);
-                       dest = dest + 1;
+                       dest++;
                }
        }
        //Resetting Frame mode (First set in fpgaloader.c)
@@ -29,13 +41,15 @@ static void RAMFUNC optimizedSnoop(void)
 
 void HfSnoop(int samplesToSkip, int triggersToSkip)
 {
+       BigBuf_free(); BigBuf_Clear();
+       
        Dbprintf("Skipping first %d sample pairs, Skipping %d triggers.\n", samplesToSkip, triggersToSkip);
-       bool trigger_cnt;
+       int trigger_cnt;
        LED_D_ON();
        // Select correct configs
        FpgaDownloadAndGo(FPGA_BITSTREAM_HF);
        // Set up the synchronous serial port
-       FpgaSetupSsc();
+       FpgaSetupSsc(FPGA_MAJOR_MODE_HF_SNOOP);
        // connect Demodulated Signal to ADC:
        SetAdcMuxFor(GPIO_MUXSEL_HIPKD);
        FpgaWriteConfWord(FPGA_MAJOR_MODE_HF_SNOOP);
@@ -45,28 +59,26 @@ void HfSnoop(int samplesToSkip, int triggersToSkip)
 
        trigger_cnt = 0;
        uint16_t r = 0;
-       while(!BUTTON_PRESS()) {
+       while(!BUTTON_PRESS() && !usb_poll_validate_length()) {
                WDT_HIT();
                if(AT91C_BASE_SSC->SSC_SR & (AT91C_SSC_RXRDY)) {
                        r = (uint16_t)AT91C_BASE_SSC->SSC_RHR;
-                       if (!(trigger_cnt == triggersToSkip) && ( (r >> 8) >= 240)) 
-                       {
-                               Dbprintf("Trigger kicked! Value: %d.", r >> 8);
-                               trigger_cnt++;
-                               break;
+                       r = MAX(r & 0xff, r >> 8); 
+                       if (r >= 240) {
+                               if (++trigger_cnt > triggersToSkip)
+                                       break;
                        } 
                }
        }
+
        if(!BUTTON_PRESS()) {
-               Dbprintf("Trigger kicked! Value: %d, Dumping Samples Hispeed now.", r >> 8);
                int waitcount = samplesToSkip; // lets wait 40000 ticks of pck0
                while(waitcount != 0) {
-                       if(AT91C_BASE_SSC->SSC_SR & (AT91C_SSC_RXRDY)) {
+                       if(AT91C_BASE_SSC->SSC_SR & (AT91C_SSC_RXRDY))
                                waitcount--;
-                       }
                }
-
                optimizedSnoop();
+               Dbprintf("Trigger kicked! Value: %d, Dumping Samples Hispeed now.", r);
        }
 
        DbpString("HF Snoop end");
@@ -74,3 +86,33 @@ void HfSnoop(int samplesToSkip, int triggersToSkip)
        LED_D_OFF();
 }
 
+void HfPlot(void)
+{
+       uint8_t *buf = ToSend;
+       uint8_t *this_buf = buf;
+       
+       FpgaDownloadAndGo(FPGA_BITSTREAM_HF);
+       FpgaSetupSsc(FPGA_MAJOR_MODE_HF_GET_TRACE);
+       AT91C_BASE_PDC_SSC->PDC_PTCR = AT91C_PDC_RXTDIS;   // Disable DMA Transfer
+       AT91C_BASE_PDC_SSC->PDC_RPR = (uint32_t) this_buf; // start transfer to this memory address
+       AT91C_BASE_PDC_SSC->PDC_RCR = USB_CMD_DATA_SIZE;   // transfer this many samples
+       buf[0] = (uint8_t)AT91C_BASE_SSC->SSC_RHR;         // clear receive register
+       AT91C_BASE_PDC_SSC->PDC_PTCR = AT91C_PDC_RXTEN;    // Start DMA transfer
+       FpgaWriteConfWord(FPGA_MAJOR_MODE_HF_GET_TRACE);   // let FPGA transfer its internal Block-RAM
+
+       LED_B_ON();
+       for(size_t i = 0; i < FPGA_TRACE_SIZE; i += USB_CMD_DATA_SIZE) {
+               // prepare next DMA transfer:
+               uint8_t *next_buf = buf + ((i + USB_CMD_DATA_SIZE) % (2 * USB_CMD_DATA_SIZE));
+               AT91C_BASE_PDC_SSC->PDC_RNPR = (uint32_t)next_buf;
+               AT91C_BASE_PDC_SSC->PDC_RNCR = USB_CMD_DATA_SIZE;
+               size_t len = MIN(FPGA_TRACE_SIZE - i, USB_CMD_DATA_SIZE);
+               while (!(AT91C_BASE_SSC->SSC_SR & (AT91C_SSC_ENDRX))) ; // wait for DMA transfer to complete
+               cmd_send(CMD_DOWNLOADED_RAW_ADC_SAMPLES_125K, i, len, FPGA_TRACE_SIZE, this_buf, len);
+               this_buf = next_buf;
+       }
+       // Trigger a finish downloading signal with an ACK frame
+       cmd_send(CMD_ACK, 1, 0, FPGA_TRACE_SIZE, 0, 0);
+       LED_B_OFF();
+       FpgaWriteConfWord(FPGA_MAJOR_MODE_OFF);
+}