+/*
+ * Generic uart / rs232/ serial port library
+ *
+ * Copyright (c) 2013, 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 uart_posix.c
+ *
+ * This version of the library has functionality removed which was not used by
+ * proxmark3 project.
+ */
+
+#include "uart.h"
+
+// Test if we are dealing with posix operating systems
+#ifndef _WIN32
+#include <termios.h>
+#include <sys/ioctl.h>
+#include <unistd.h>
+#include <fcntl.h>
+#include <sys/types.h>
+#include <sys/stat.h>
+#include <limits.h>
+#include <sys/time.h>
+#include <errno.h>
+
+typedef struct termios term_info;
+typedef struct {
+ int fd; // Serial port file descriptor
+ term_info tiOld; // Terminal info before using the port
+ term_info tiNew; // Terminal info during the transaction
+} serial_port_unix;
+
+// Set time-out on 30 miliseconds
+const struct timeval timeout = {
+ .tv_sec = 0, // 0 second
+ .tv_usec = 30000 // 30000 micro seconds
+};
+
+serial_port uart_open(const char* pcPortName)
+{
+ serial_port_unix* sp = malloc(sizeof(serial_port_unix));
+ 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;
+ }
+
+ // Finally figured out a way to claim a serial port interface under unix
+ // We just try to set a (advisory) lock on the file descriptor
+ struct flock fl;
+ fl.l_type = F_WRLCK;
+ fl.l_whence = SEEK_SET;
+ fl.l_start = 0;
+ fl.l_len = 0;
+ fl.l_pid = getpid();
+
+ // Does the system allows us to place a lock on this file descriptor
+ if (fcntl(sp->fd, F_SETLK, &fl) == -1) {
+ // A conflicting lock is held by another process
+ free(sp);
+ return CLAIMED_SERIAL_PORT;
+ }
+
+ // Try to retrieve the old (current) terminal info struct
+ if(tcgetattr(sp->fd,&sp->tiOld) == -1) {
+ uart_close(sp);
+ return INVALID_SERIAL_PORT;
+ }
+
+ // Duplicate the (old) terminal info struct
+ sp->tiNew = sp->tiOld;
+
+ // Configure the serial port
+ sp->tiNew.c_cflag = CS8 | CLOCAL | CREAD;
+ sp->tiNew.c_iflag = IGNPAR;
+ sp->tiNew.c_oflag = 0;
+ sp->tiNew.c_lflag = 0;
+
+ // Block until n bytes are received
+ sp->tiNew.c_cc[VMIN] = 0;
+ // Block until a timer expires (n * 100 mSec.)
+ sp->tiNew.c_cc[VTIME] = 0;
+
+ // Try to set the new terminal info struct
+ if(tcsetattr(sp->fd,TCSANOW,&sp->tiNew) == -1) {
+ uart_close(sp);
+ return INVALID_SERIAL_PORT;
+ }
+
+ // Flush all lingering data that may exist
+ tcflush(sp->fd, TCIOFLUSH);
+
+ return sp;
+}
+
+void uart_close(const serial_port sp) {
+ serial_port_unix* spu = (serial_port_unix*)sp;
+ tcflush(spu->fd,TCIOFLUSH);
+ tcsetattr(spu->fd,TCSANOW,&(spu->tiOld));
+ struct flock fl;
+ fl.l_type = F_UNLCK;
+ fl.l_whence = SEEK_SET;
+ fl.l_start = 0;
+ fl.l_len = 0;
+ fl.l_pid = getpid();
+ fcntl(spu->fd, F_SETLK, &fl);
+ close(spu->fd);
+ free(sp);
+}
+
+bool uart_receive(const serial_port sp, byte_t* pbtRx, size_t pszMaxRxLen, size_t* pszRxLen) {
+ int res;
+ int byteCount;
+ fd_set rfds;
+ struct timeval tv;
+
+ // 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) {
+ return false;
+ }
+
+ // Read time-out
+ if (res == 0) {
+ if (*pszRxLen == 0) {
+ // Error, we received no data
+ 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;
+
+ // Cap the number of bytes, so we don't overrun the buffer
+ if (pszMaxRxLen - (*pszRxLen) < byteCount) {
+ byteCount = pszMaxRxLen - (*pszRxLen);
+ }
+
+ // 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;
+
+ if (*pszRxLen == pszMaxRxLen) {
+ // We have all the data we wanted.
+ return true;
+ }
+
+ } while (byteCount);
+
+ return true;
+}
+
+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_ZERO(&rfds);
+ 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) {
+ return false;
+ }
+
+ // Write time-out
+ if (res == 0) {
+ 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;
+}
+
+bool uart_set_speed(serial_port sp, const uint32_t uiPortSpeed) {
+ const serial_port_unix* spu = (serial_port_unix*)sp;
+ speed_t stPortSpeed;
+ switch (uiPortSpeed) {
+ case 0: stPortSpeed = B0; break;
+ case 50: stPortSpeed = B50; break;
+ case 75: stPortSpeed = B75; break;
+ case 110: stPortSpeed = B110; break;
+ case 134: stPortSpeed = B134; break;
+ case 150: stPortSpeed = B150; break;
+ case 300: stPortSpeed = B300; break;
+ case 600: stPortSpeed = B600; break;
+ case 1200: stPortSpeed = B1200; break;
+ case 1800: stPortSpeed = B1800; break;
+ case 2400: stPortSpeed = B2400; break;
+ case 4800: stPortSpeed = B4800; break;
+ case 9600: stPortSpeed = B9600; break;
+ case 19200: stPortSpeed = B19200; break;
+ case 38400: stPortSpeed = B38400; break;
+# ifdef B57600
+ case 57600: stPortSpeed = B57600; break;
+# endif
+# ifdef B115200
+ case 115200: stPortSpeed = B115200; break;
+# endif
+# ifdef B230400
+ case 230400: stPortSpeed = B230400; break;
+# endif
+# ifdef B460800
+ case 460800: stPortSpeed = B460800; break;
+# endif
+# ifdef B921600
+ case 921600: stPortSpeed = B921600; break;
+# endif
+ default: return false;
+ };
+ struct termios ti;
+ if (tcgetattr(spu->fd,&ti) == -1) return false;
+ // Set port speed (Input and Output)
+ cfsetispeed(&ti,stPortSpeed);
+ cfsetospeed(&ti,stPortSpeed);
+ return (tcsetattr(spu->fd,TCSANOW,&ti) != -1);
+}
+
+uint32_t uart_get_speed(const serial_port sp) {
+ struct termios ti;
+ uint32_t uiPortSpeed;
+ const serial_port_unix* spu = (serial_port_unix*)sp;
+ if (tcgetattr(spu->fd,&ti) == -1) return 0;
+ // Set port speed (Input)
+ speed_t stPortSpeed = cfgetispeed(&ti);
+ switch (stPortSpeed) {
+ case B0: uiPortSpeed = 0; break;
+ case B50: uiPortSpeed = 50; break;
+ case B75: uiPortSpeed = 75; break;
+ case B110: uiPortSpeed = 110; break;
+ case B134: uiPortSpeed = 134; break;
+ case B150: uiPortSpeed = 150; break;
+ case B300: uiPortSpeed = 300; break;
+ case B600: uiPortSpeed = 600; break;
+ case B1200: uiPortSpeed = 1200; break;
+ case B1800: uiPortSpeed = 1800; break;
+ case B2400: uiPortSpeed = 2400; break;
+ case B4800: uiPortSpeed = 4800; break;
+ case B9600: uiPortSpeed = 9600; break;
+ case B19200: uiPortSpeed = 19200; break;
+ case B38400: uiPortSpeed = 38400; break;
+# ifdef B57600
+ case B57600: uiPortSpeed = 57600; break;
+# endif
+# ifdef B115200
+ case B115200: uiPortSpeed = 115200; break;
+# endif
+# ifdef B230400
+ case B230400: uiPortSpeed = 230400; break;
+# endif
+# ifdef B460800
+ case B460800: uiPortSpeed = 460800; break;
+# endif
+# ifdef B921600
+ case B921600: uiPortSpeed = 921600; break;
+# endif
+ default: return 0;
+ };
+ return uiPortSpeed;
+}
+
+#endif
+
projects / proxmark3-svn / blobdiff