git.zerfleddert.de Git - proxmark3-svn/blob - uart/uart_win32.c

   1 /*
   2  * Generic uart / rs232/ serial port library
   3  *
   4  * Copyright (c) 2013, Roel Verdult
   5  * All rights reserved.
   6  *
   7  * Redistribution and use in source and binary forms, with or without
   8  * modification, are permitted provided that the following conditions are met:
   9  * 1. Redistributions of source code must retain the above copyright
  10  * notice, this list of conditions and the following disclaimer.
  11  * 2. Redistributions in binary form must reproduce the above copyright
  12  * notice, this list of conditions and the following disclaimer in the
  13  * documentation and/or other materials provided with the distribution.
  14  * 3. Neither the name of the copyright holders nor the
  15  * names of its contributors may be used to endorse or promote products
  16  * derived from this software without specific prior written permission.
  17  *
  18  * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS ''AS IS'' AND ANY
  19  * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
  20  * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
  21  * DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDERS BE LIABLE FOR ANY
  22  * DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
  23  * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
  24  * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
  25  * ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
  26  * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
  27  * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  28  *
  29  * @file uart_win32.c
  30  *
  31  * Note: the win32 version of this library has also been seen under the GPLv3+
  32  * license as part of the libnfc project, which appears to have additional
  33  * contributors.
  34  *
  35  * This version of the library has functionality removed which was not used by
  36  * proxmark3 project.
  37  */
  38
  39 #include "uart.h"
  40
  41 // The windows serial port implementation
  42 #ifdef _WIN32
  43 #include <windows.h>
  44
  45 typedef struct {
  46   HANDLE hPort;     // Serial port handle
  47   DCB dcb;          // Device control settings
  48   COMMTIMEOUTS ct;  // Serial port time-out configuration
  49 } serial_port_windows;
  50
  51 void upcase(char *p) {
  52   while(*p != '\0') {
  53     if(*p >= 97 && *p <= 122) {
  54       *p -= 32;
  55     }
  56     ++p;
  57   }
  58 }
  59
  60 serial_port uart_open(const char* pcPortName) {
  61   char acPortName[255];
  62   serial_port_windows* sp = malloc(sizeof(serial_port_windows));
  63
  64   // Copy the input "com?" to "\\.\COM?" format
  65   sprintf(acPortName,"\\\\.\\%s",pcPortName);
  66   upcase(acPortName);
  67
  68   // Try to open the serial port
  69   sp->hPort = CreateFileA(acPortName,GENERIC_READ|GENERIC_WRITE,0,NULL,OPEN_EXISTING,0,NULL);
  70   if (sp->hPort == INVALID_HANDLE_VALUE) {
  71     uart_close(sp);
  72     return INVALID_SERIAL_PORT;
  73   }
  74
  75   // Prepare the device control
  76   memset(&sp->dcb, 0, sizeof(DCB));
  77   sp->dcb.DCBlength = sizeof(DCB);
  78   if(!BuildCommDCBA("baud=9600 data=8 parity=N stop=1",&sp->dcb)) {
  79     uart_close(sp);
  80     return INVALID_SERIAL_PORT;
  81   }
  82
  83   // Update the active serial port
  84   if(!SetCommState(sp->hPort,&sp->dcb)) {
  85     uart_close(sp);
  86     return INVALID_SERIAL_PORT;
  87   }
  88
  89   sp->ct.ReadIntervalTimeout         = 0;
  90   sp->ct.ReadTotalTimeoutMultiplier  = 0;
  91   sp->ct.ReadTotalTimeoutConstant    = 30;
  92   sp->ct.WriteTotalTimeoutMultiplier = 0;
  93   sp->ct.WriteTotalTimeoutConstant   = 30;
  94
  95   if(!SetCommTimeouts(sp->hPort,&sp->ct)) {
  96     uart_close(sp);
  97     return INVALID_SERIAL_PORT;
  98   }
  99
 100   PurgeComm(sp->hPort, PURGE_RXABORT | PURGE_RXCLEAR);
 101
 102   return sp;
 103 }
 104
 105 void uart_close(const serial_port sp) {
 106   CloseHandle(((serial_port_windows*)sp)->hPort);
 107   free(sp);
 108 }
 109
 110 bool uart_receive(const serial_port sp, byte_t *pbtRx, size_t pszMaxRxLen, size_t *pszRxLen) {
 111   return ReadFile(((serial_port_windows*)sp)->hPort, pbtRx, pszMaxRxLen, (LPDWORD)pszRxLen, NULL);
 112 }
 113
 114 bool uart_send(const serial_port sp, const byte_t* pbtTx, const size_t szTxLen) {
 115   DWORD dwTxLen = 0;
 116   return WriteFile(((serial_port_windows*)sp)->hPort, pbtTx, szTxLen, &dwTxLen, NULL);
 117 }
 118
 119 bool uart_set_speed(serial_port sp, const uint32_t uiPortSpeed) {
 120   serial_port_windows* spw;
 121   spw = (serial_port_windows*)sp;
 122   spw->dcb.BaudRate = uiPortSpeed;
 123   return SetCommState(spw->hPort, &spw->dcb);
 124 }
 125
 126 uint32_t uart_get_speed(const serial_port sp) {
 127   const serial_port_windows* spw = (serial_port_windows*)sp;
 128   if (!GetCommState(spw->hPort, (serial_port)&spw->dcb)) {
 129     return spw->dcb.BaudRate;
 130   }
 131   return 0;
 132 }
 133
 134 #endif