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 #include <stdio.h>
  42 #include <stdint.h>
  43 #include <stdbool.h>
  44
  45
  46 // The windows serial port implementation
  47 #ifdef _WIN32
  48 #include <windows.h>
  49
  50 typedef struct {
  51         HANDLE hPort;     // Serial port handle
  52         DCB dcb;          // Device control settings
  53         COMMTIMEOUTS ct;  // Serial port time-out configuration
  54 } serial_port_windows;
  55
  56
  57 void upcase(char *p) {
  58         while(*p != '\0') {
  59                 if(*p >= 97 && *p <= 122) {
  60                         *p -= 32;
  61                 }
  62                 ++p;
  63         }
  64 }
  65
  66
  67 void uart_close(const serial_port sp) {
  68         CloseHandle(((serial_port_windows*)sp)->hPort);
  69         free(sp);
  70 }
  71
  72
  73 serial_port uart_open(const char* pcPortName) {
  74         char acPortName[255];
  75         serial_port_windows* sp = malloc(sizeof(serial_port_windows));
  76
  77         // Copy the input "com?" to "\\.\COM?" format
  78         sprintf(acPortName,"\\\\.\\%s",pcPortName);
  79         upcase(acPortName);
  80
  81         // Try to open the serial port
  82         sp->hPort = CreateFileA(acPortName, GENERIC_READ | GENERIC_WRITE, 0, NULL, OPEN_EXISTING, 0, NULL);
  83         if (sp->hPort == INVALID_HANDLE_VALUE) {
  84                 uart_close(sp);
  85                 return INVALID_SERIAL_PORT;
  86         }
  87
  88         // Prepare the device control
  89         memset(&sp->dcb, 0, sizeof(DCB));
  90         sp->dcb.DCBlength = sizeof(DCB);
  91         if (!BuildCommDCBA("baud=9600 data=8 parity=N stop=1",&sp->dcb)) {
  92                 uart_close(sp);
  93                 return INVALID_SERIAL_PORT;
  94         }
  95
  96         // Update the active serial port
  97         if (!SetCommState(sp->hPort,&sp->dcb)) {
  98                 uart_close(sp);
  99                 return INVALID_SERIAL_PORT;
 100         }
 101
 102         sp->ct.ReadIntervalTimeout         = 0;
 103         sp->ct.ReadTotalTimeoutMultiplier  = 0;
 104         sp->ct.ReadTotalTimeoutConstant    = 30;
 105         sp->ct.WriteTotalTimeoutMultiplier = 0;
 106         sp->ct.WriteTotalTimeoutConstant   = 30;
 107
 108         if (!SetCommTimeouts(sp->hPort, &sp->ct)) {
 109                 uart_close(sp);
 110                 return INVALID_SERIAL_PORT;
 111         }
 112
 113         PurgeComm(sp->hPort, PURGE_RXABORT | PURGE_RXCLEAR);
 114
 115         return sp;
 116 }
 117
 118
 119 bool uart_receive(const serial_port sp, uint8_t *pbtRx, size_t pszMaxRxLen, size_t *pszRxLen) {
 120         return ReadFile(((serial_port_windows*)sp)->hPort, pbtRx, pszMaxRxLen, (LPDWORD)pszRxLen, NULL);
 121 }
 122
 123
 124 bool uart_send(const serial_port sp, const uint8_t* pbtTx, const size_t szTxLen) {
 125         DWORD dwTxLen = 0;
 126         return WriteFile(((serial_port_windows*)sp)->hPort, pbtTx, szTxLen, &dwTxLen, NULL);
 127 }
 128
 129
 130 bool uart_set_speed(serial_port sp, const uint32_t uiPortSpeed) {
 131         serial_port_windows* spw;
 132         spw = (serial_port_windows*)sp;
 133         spw->dcb.BaudRate = uiPortSpeed;
 134         return SetCommState(spw->hPort, &spw->dcb);
 135 }
 136
 137
 138 uint32_t uart_get_speed(const serial_port sp) {
 139         const serial_port_windows* spw = (serial_port_windows*)sp;
 140         if (!GetCommState(spw->hPort, (serial_port)&spw->dcb)) {
 141                 return spw->dcb.BaudRate;
 142         }
 143         return 0;
 144 }
 145
 146 #endif