Refactoring uart interface (#341)
[proxmark3-svn] / uart / uart_win32.c
CommitLineData
067bfc8b
MF
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
45typedef 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
51void upcase(char *p) {
52 while(*p != '\0') {
53 if(*p >= 97 && *p <= 122) {
54 *p -= 32;
55 }
56 ++p;
57 }
58}
59
60serial_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
105void uart_close(const serial_port sp) {
106 CloseHandle(((serial_port_windows*)sp)->hPort);
107 free(sp);
108}
109
110bool uart_receive(const serial_port sp, byte_t* pbtRx, size_t pszMaxRxLen, size_t* pszRxLen) {
111 ReadFile(((serial_port_windows*)sp)->hPort,pbtRx,pszMaxRxLen,(LPDWORD)pszRxLen,NULL);
112 return (*pszRxLen != 0);
113}
114
115bool uart_send(const serial_port sp, const byte_t* pbtTx, const size_t szTxLen) {
116 DWORD dwTxLen = 0;
117 return WriteFile(((serial_port_windows*)sp)->hPort,pbtTx,szTxLen,&dwTxLen,NULL);
118 return (dwTxLen != 0);
119}
120
121bool uart_set_speed(serial_port sp, const uint32_t uiPortSpeed) {
122 serial_port_windows* spw;
123 spw = (serial_port_windows*)sp;
124 spw->dcb.BaudRate = uiPortSpeed;
125 return SetCommState(spw->hPort, &spw->dcb);
126}
127
128uint32_t uart_get_speed(const serial_port sp) {
129 const serial_port_windows* spw = (serial_port_windows*)sp;
130 if (!GetCommState(spw->hPort, (serial_port)&spw->dcb)) {
131 return spw->dcb.BaudRate;
132 }
133 return 0;
134}
135
136#endif
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