/*
- * Proxmark3 generic uart / rs232/ serial port library
+ * Generic uart / rs232/ serial port library
*
- * Copyright (c) 2012, Roel Verdult
+ * Copyright (c) 2013, Roel Verdult
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* @file uart.c
* @brief
*
- * Partly based on uart-code written by Teunis van Beelen, available:
- * http://www.teuniz.net/RS-232/index.html
- *
*/
#include "uart.h"
-#include "messages.h"
// Test if we are dealing with unix operating systems
#ifndef _WIN32
} serial_port_unix;
// Set time-out on 30 miliseconds
-const struct timeval timeout = {
+const struct timeval timeout = {
.tv_sec = 0, // 0 second
.tv_usec = 30000 // 30000 micro seconds
};
// Work-around to claim uart interface using the c_iflag (software input processing) from the termios struct
-#define CCLAIMED 0x80000000
+#define CCLAIMED 0x00008000
+
+char pcPort[255];
serial_port uart_open(const char* pcPortName)
{
serial_port_unix* sp = malloc(sizeof(serial_port_unix));
-
+ strcpy(pcPort,pcPortName);
+
if (sp == 0) return INVALID_SERIAL_PORT;
-
+
sp->fd = open(pcPortName, O_RDWR | O_NOCTTY | O_NDELAY | O_NONBLOCK);
if(sp->fd == -1)
{
uart_close(sp);
return INVALID_SERIAL_PORT;
}
-
+
if(tcgetattr(sp->fd,&sp->tiOld) == -1)
{
uart_close(sp);
return INVALID_SERIAL_PORT;
}
-
+
// Make sure the port is not claimed already
if (sp->tiOld.c_iflag & CCLAIMED)
{
uart_close(sp);
return CLAIMED_SERIAL_PORT;
}
-
+
// Copy the old terminal info struct
sp->tiNew = sp->tiOld;
-
+
sp->tiNew.c_cflag = CS8 | CLOCAL | CREAD;
sp->tiNew.c_iflag = CCLAIMED | IGNPAR;
sp->tiNew.c_oflag = 0;
sp->tiNew.c_lflag = 0;
// Set serial port equivalent to raw mode
-// sp->tiNew.c_iflag &= ~(IGNBRK | BRKINT | PARMRK | ISTRIP | INLCR | IGNCR | ICRNL | IXON);
+// sp->tiNew.c_iflag &= ~(CCLAIMED | IGNBRK | BRKINT | IGNPAR | ISTRIP | INLCR | IGNCR | ICRNL | IXON);
// sp->tiNew.c_oflag &= ~OPOST;
// sp->tiNew.c_lflag &= ~(ECHO | ECHONL | ICANON | ISIG | IEXTEN);
-// sp->tiNew.c_cflag &= ~(CSIZE | PARENB);
-// sp->tiNew.c_iflag |= CCLAIMED | IGNPAR;
-// sp->tiNew.c_cflag |= CS8 | CLOCAL | CREAD;
-
+// sp->tiNew.c_cflag &= ~(CSIZE | PARENB | CS8 | CLOCAL | CREAD);
+
sp->tiNew.c_cc[VMIN] = 0; // block until n bytes are received
sp->tiNew.c_cc[VTIME] = 0; // block until a timer expires (n * 100 mSec.)
-
+
if(tcsetattr(sp->fd,TCSANOW,&sp->tiNew) == -1)
{
uart_close(sp);
return INVALID_SERIAL_PORT;
}
-
+
tcflush(sp->fd, TCIOFLUSH);
return sp;
}
-void uart_set_speed(serial_port sp, const uint32_t uiPortSpeed)
-{
- DBG("Serial port speed requested to be set to %d bauds.", uiPortSpeed);
+bool uart_set_speed(serial_port sp, const uint32_t uiPortSpeed) {
// Set port speed (Input and Output)
- speed_t stPortSpeed = B9600;
- switch(uiPortSpeed) {
- case 9600: stPortSpeed = B9600;
- break;
- case 19200: stPortSpeed = B19200;
- break;
- case 38400: stPortSpeed = B38400;
- break;
- case 57600: stPortSpeed = B57600;
- break;
- case 115200: stPortSpeed = B115200;
- break;
- case 230400: stPortSpeed = B230400;
- break;
-#ifdef B460800
- case 460800: stPortSpeed = B460800;
- break;
-#endif
- default:
-#ifdef B460800
- ERR("Unable to set serial port speed to %d bauds. Speed value must be one of these constants: 9600 (default), 19200, 38400, 57600, 115200, 230400 or 460800.", uiPortSpeed);
-#else
- ERR("Unable to set serial port speed to %d bauds. Speed value must be one of these constants: 9600 (default), 19200, 38400, 57600, 115200 or 230400.", uiPortSpeed);
-#endif
- };
const serial_port_unix* spu = (serial_port_unix*)sp;
- cfsetispeed((struct termios*)&spu->tiNew, stPortSpeed);
- cfsetospeed((struct termios*)&spu->tiNew, stPortSpeed);
- if( tcsetattr(spu->fd, TCSADRAIN, &spu->tiNew) == -1)
- {
- ERR("Unable to apply new speed settings.");
- }
+ cfsetispeed((struct termios*)&spu->tiNew, uiPortSpeed);
+ cfsetospeed((struct termios*)&spu->tiNew, uiPortSpeed);
+ return (tcsetattr(spu->fd, TCSADRAIN, &spu->tiNew) != -1);
}
-uint32_t uart_get_speed(const serial_port sp)
-{
+uint32_t uart_get_speed(const serial_port sp) {
uint32_t uiPortSpeed = 0;
const serial_port_unix* spu = (serial_port_unix*)sp;
- switch (cfgetispeed(&spu->tiNew))
- {
- case B9600: uiPortSpeed = 9600;
- break;
- case B19200: uiPortSpeed = 19200;
- break;
- case B38400: uiPortSpeed = 38400;
- break;
- case B57600: uiPortSpeed = 57600;
- break;
- case B115200: uiPortSpeed = 115200;
- break;
- case B230400: uiPortSpeed = 230400;
- break;
-#ifdef B460800
- case B460800: uiPortSpeed = 460800;
- break;
-#endif
- }
-
+ uiPortSpeed = cfgetispeed(&spu->tiNew);
return uiPortSpeed;
}
-void uart_close(const serial_port sp)
-{
+void uart_close(const serial_port sp) {
tcflush(((serial_port_unix*)sp)->fd,TCIOFLUSH);
tcsetattr(((serial_port_unix*)sp)->fd,TCSANOW,&((serial_port_unix*)sp)->tiOld);
close(((serial_port_unix*)sp)->fd);
free(sp);
}
-bool uart_cts(const serial_port sp)
-{
+bool uart_cts(const serial_port sp) {
char status;
if (ioctl(((serial_port_unix*)sp)->fd,TIOCMGET,&status) < 0) return false;
return (status & TIOCM_CTS);
}
-bool uart_receive(const serial_port sp, byte_t* pbtRx, size_t* pszRxLen)
-{
+bool uart_receive(const serial_port sp, byte_t* pbtRx, size_t* pszRxLen) {
int res;
int byteCount;
fd_set rfds;
struct timeval tv;
-
- // Reset the output count
+
+ // Reset the output count
*pszRxLen = 0;
-
+
do {
// Reset file descriptor
FD_ZERO(&rfds);
FD_SET(((serial_port_unix*)sp)->fd,&rfds);
tv = timeout;
res = select(((serial_port_unix*)sp)->fd+1, &rfds, NULL, NULL, &tv);
-
+
// Read error
if (res < 0) {
- DBG("RX error.");
return false;
}
-
+
// Read time-out
if (res == 0) {
if (*pszRxLen == 0) {
// Error, we received no data
- DBG("RX time-out, buffer empty.");
return false;
} else {
// We received some data, but nothing more is available
return true;
}
}
-
+
// Retrieve the count of the incoming bytes
res = ioctl(((serial_port_unix*)sp)->fd, FIONREAD, &byteCount);
if (res < 0) return false;
-
+
// There is something available, read the data
res = read(((serial_port_unix*)sp)->fd,pbtRx+(*pszRxLen),byteCount);
-
+
// Stop if the OS has some troubles reading the data
if (res <= 0) return false;
-
+
*pszRxLen += res;
-
+
} while (byteCount);
-
+
return true;
}
-bool uart_send(const serial_port sp, const byte_t* pbtTx, const size_t szTxLen)
-{
+bool uart_send(const serial_port sp, const byte_t* pbtTx, const size_t szTxLen) {
int32_t res;
size_t szPos = 0;
fd_set rfds;
struct timeval tv;
-
+
while (szPos < szTxLen)
{
// Reset file descriptor
FD_SET(((serial_port_unix*)sp)->fd,&rfds);
tv = timeout;
res = select(((serial_port_unix*)sp)->fd+1, NULL, &rfds, NULL, &tv);
-
+
// Write error
if (res < 0) {
- DBG("TX error.");
return false;
}
-
+
// Write time-out
if (res == 0) {
- DBG("TX time-out.");
return false;
}
-
+
// Send away the bytes
res = write(((serial_port_unix*)sp)->fd,pbtTx+szPos,szTxLen-szPos);
// Stop if the OS has some troubles sending the data
if (res <= 0) return false;
-
+
szPos += res;
}
return true;
#else
// The windows serial port implementation
-typedef struct {
+typedef struct {
HANDLE hPort; // Serial port handle
DCB dcb; // Device control settings
COMMTIMEOUTS ct; // Serial port time-out configuration
}
}
-serial_port uart_open(const char* pcPortName)
-{
+serial_port uart_open(const char* pcPortName) {
char acPortName[255];
serial_port_windows* sp = malloc(sizeof(serial_port_windows));
-
+
// Copy the input "com?" to "\\.\COM?" format
sprintf(acPortName,"\\\\.\\%s",pcPortName);
upcase(acPortName);
-
+
// Try to open the serial port
sp->hPort = CreateFileA(acPortName,GENERIC_READ|GENERIC_WRITE,0,NULL,OPEN_EXISTING,0,NULL);
if (sp->hPort == INVALID_HANDLE_VALUE)
uart_close(sp);
return INVALID_SERIAL_PORT;
}
-
+
// Prepare the device control
memset(&sp->dcb, 0, sizeof(DCB));
sp->dcb.DCBlength = sizeof(DCB);
uart_close(sp);
return INVALID_SERIAL_PORT;
}
-
+
// Update the active serial port
if(!SetCommState(sp->hPort,&sp->dcb))
{
uart_close(sp);
return INVALID_SERIAL_PORT;
}
-
+
sp->ct.ReadIntervalTimeout = 0;
sp->ct.ReadTotalTimeoutMultiplier = 0;
sp->ct.ReadTotalTimeoutConstant = 30;
sp->ct.WriteTotalTimeoutMultiplier = 0;
sp->ct.WriteTotalTimeoutConstant = 30;
-
+
if(!SetCommTimeouts(sp->hPort,&sp->ct))
{
uart_close(sp);
return INVALID_SERIAL_PORT;
}
-
+
PurgeComm(sp->hPort, PURGE_RXABORT | PURGE_RXCLEAR);
-
+
return sp;
}
-void uart_close(const serial_port sp)
-{
+void uart_close(const serial_port sp) {
CloseHandle(((serial_port_windows*)sp)->hPort);
free(sp);
}
-void uart_set_speed(serial_port sp, const uint32_t uiPortSpeed)
-{
+bool uart_set_speed(serial_port sp, const uint32_t uiPortSpeed) {
serial_port_windows* spw;
-
- DBG("Serial port speed requested to be set to %d bauds.", uiPortSpeed);
- // Set port speed (Input and Output)
- switch(uiPortSpeed) {
- case 9600:
- case 19200:
- case 38400:
- case 57600:
- case 115200:
- case 230400:
- case 460800:
- break;
- default:
- ERR("Unable to set serial port speed to %d bauds. Speed value must be one of these constants: 9600 (default), 19200, 38400, 57600, 115200, 230400 or 460800.", uiPortSpeed);
- };
-
spw = (serial_port_windows*)sp;
spw->dcb.BaudRate = uiPortSpeed;
- if (!SetCommState(spw->hPort, &spw->dcb))
- {
- ERR("Unable to apply new speed settings.");
- }
+ return SetCommState(spw->hPort, &spw->dcb);
}
-uint32_t uart_get_speed(const serial_port sp)
-{
+uint32_t uart_get_speed(const serial_port sp) {
const serial_port_windows* spw = (serial_port_windows*)sp;
- if (!GetCommState(spw->hPort, (serial_port)&spw->dcb))
+ if (!GetCommState(spw->hPort, (serial_port)&spw->dcb)) {
return spw->dcb.BaudRate;
-
+ }
return 0;
}
-bool uart_receive(const serial_port sp, byte_t* pbtRx, size_t* pszRxLen)
-{
+bool uart_receive(const serial_port sp, byte_t* pbtRx, size_t* pszRxLen) {
ReadFile(((serial_port_windows*)sp)->hPort,pbtRx,*pszRxLen,(LPDWORD)pszRxLen,NULL);
return (*pszRxLen != 0);
}
-bool uart_send(const serial_port sp, const byte_t* pbtTx, const size_t szTxLen)
-{
+bool uart_send(const serial_port sp, const byte_t* pbtTx, const size_t szTxLen) {
DWORD dwTxLen = 0;
return WriteFile(((serial_port_windows*)sp)->hPort,pbtTx,szTxLen,&dwTxLen,NULL);
return (dwTxLen != 0);
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