[457] | 1 | /*
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| 2 | * Copyright (c) 2001-2003 Swedish Institute of Computer Science.
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| 3 | * All rights reserved.
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| 4 | *
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| 5 | * Redistribution and use in source and binary forms, with or without modification,
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| 6 | * are permitted provided that the following conditions are met:
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| 7 | *
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| 8 | * 1. Redistributions of source code must retain the above copyright notice,
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| 9 | * this list of conditions and the following disclaimer.
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| 10 | * 2. Redistributions in binary form must reproduce the above copyright notice,
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| 11 | * this list of conditions and the following disclaimer in the documentation
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| 12 | * and/or other materials provided with the distribution.
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| 13 | * 3. The name of the author may not be used to endorse or promote products
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| 14 | * derived from this software without specific prior written permission.
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| 15 | *
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| 16 | * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR IMPLIED
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| 17 | * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
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| 18 | * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT
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| 19 | * SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
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| 20 | * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT
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| 21 | * OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
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| 22 | * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
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| 23 | * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING
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| 24 | * IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY
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| 25 | * OF SUCH DAMAGE.
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| 26 | *
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| 27 | * This file is part of the lwIP TCP/IP stack.
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| 28 | *
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| 29 | */
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| 30 |
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| 31 | #include <lwip/opt.h>
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| 32 | #include <lwip/sys.h>
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| 33 | #include <lwip/sio.h>
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| 34 |
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| 35 | #include <stdio.h>
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| 36 | #include <stdarg.h>
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| 37 |
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| 38 | #ifdef _MSC_VER
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| 39 | #pragma warning (push, 3)
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| 40 | #endif
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| 41 | #include <windows.h>
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| 42 | #ifdef _MSC_VER
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| 43 | #pragma warning (pop)
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| 44 | #endif
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| 45 | #include "lwipcfg.h"
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| 46 |
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| 47 | /** When 1, use COM ports, when 0, use named pipes (for simulation). */
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| 48 | #ifndef SIO_USE_COMPORT
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| 49 | #define SIO_USE_COMPORT 1
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| 50 | #endif
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| 51 |
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| 52 | /** If SIO_USE_COMPORT==1, use COMx, if 0, use a pipe (default) */
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| 53 | #if SIO_USE_COMPORT
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| 54 | #define SIO_DEVICENAME "\\\\.\\COM"
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| 55 | #else
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| 56 | #define SIO_DEVICENAME "\\\\.\\pipe\\lwip"
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| 57 | #endif
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| 58 |
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| 59 | #if SIO_USE_COMPORT
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| 60 | #ifndef SIO_COMPORT_SPEED
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| 61 | #define SIO_COMPORT_SPEED 115200
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| 62 | #endif
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| 63 | #ifndef SIO_COMPORT_BYTESIZE
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| 64 | #define SIO_COMPORT_BYTESIZE 8
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| 65 | #endif
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| 66 | #ifndef SIO_COMPORT_STOPBITS
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| 67 | #define SIO_COMPORT_STOPBITS 0 /* ONESTOPBIT */
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| 68 | #endif
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| 69 | #ifndef SIO_COMPORT_PARITY
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| 70 | #define SIO_COMPORT_PARITY 0 /* NOPARITY */
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| 71 | #endif
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| 72 | #endif /* SIO_USE_COMPORT */
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| 73 |
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| 74 | static int sio_abort = 0;
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| 75 |
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| 76 | /* \\.\pipe\lwip0 */
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| 77 | /* pppd /dev/ttyS0 logfile mylog debug nocrtscts local noauth noccp ms-dns 212.27.54.252 192.168.0.4:192.168.0.5
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| 78 | */
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| 79 |
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| 80 | /**
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| 81 | * SIO_DEBUG: Enable debugging for SIO.
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| 82 | */
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| 83 | #ifndef SIO_DEBUG
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| 84 | #define SIO_DEBUG LWIP_DBG_OFF
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| 85 | #endif
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| 86 |
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| 87 | #if SIO_USE_COMPORT
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| 88 | /** When using a real COM port, set up the
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| 89 | * serial line settings (baudrate etc.)
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| 90 | */
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| 91 | static BOOL
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| 92 | sio_setup(HANDLE fd)
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| 93 | {
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| 94 | COMMTIMEOUTS cto;
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| 95 | DCB dcb;
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| 96 |
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| 97 | /* set up baudrate and other communication settings */
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| 98 | memset(&dcb, 0, sizeof(dcb));
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| 99 | /* Obtain the DCB structure for the device */
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| 100 | if (!GetCommState(fd, &dcb)) {
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| 101 | return FALSE;
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| 102 | }
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| 103 | /* Set the new data */
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| 104 | dcb.BaudRate = SIO_COMPORT_SPEED;
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| 105 | dcb.ByteSize = SIO_COMPORT_BYTESIZE;
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| 106 | dcb.StopBits = 0; /* ONESTOPBIT */
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| 107 | dcb.Parity = 0; /* NOPARITY */
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| 108 | dcb.fParity = 0; /* parity is not used */
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| 109 | /* do not use flow control */
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| 110 | /*dcb.fOutxDsrFlow = dcb.fDtrControl = 0;
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| 111 | dcb.fOutxCtsFlow = dcb.fRtsControl = 0;
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| 112 | dcb.fErrorChar = dcb.fNull = 0;
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| 113 | dcb.fInX = dcb.fOutX = 0;
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| 114 | dcb.XonChar = dcb.XoffChar = 0;
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| 115 | dcb.XonLim = dcb.XoffLim = 100;*/
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| 116 |
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| 117 | /* Set the new DCB structure */
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| 118 | if (!SetCommState(fd, &dcb)) {
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| 119 | return FALSE;
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| 120 | }
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| 121 |
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| 122 | memset(&cto, 0, sizeof(cto));
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| 123 | if(!GetCommTimeouts(fd, &cto))
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| 124 | {
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| 125 | return FALSE;
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| 126 | }
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| 127 | /* change read timeout, leave write timeout as it is */
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| 128 | cto.ReadIntervalTimeout = 1;
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| 129 | cto.ReadTotalTimeoutMultiplier = 0;
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| 130 | cto.ReadTotalTimeoutConstant = 1; /* 1 ms */
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| 131 | if(!SetCommTimeouts(fd, &cto)) {
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| 132 | return FALSE;
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| 133 | }
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| 134 |
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| 135 | return TRUE;
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| 136 | }
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| 137 | #endif /* SIO_USE_COMPORT */
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| 138 |
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| 139 | /**
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| 140 | * Opens a serial device for communication.
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| 141 | *
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| 142 | * @param devnum device number
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| 143 | * @return handle to serial device if successful, NULL otherwise
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| 144 | */
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| 145 | sio_fd_t sio_open(u8_t devnum)
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| 146 | {
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| 147 | HANDLE fileHandle = INVALID_HANDLE_VALUE;
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| 148 | CHAR fileName[256];
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| 149 | LWIP_DEBUGF(SIO_DEBUG, ("sio_open(%lu)\n", (DWORD)devnum));
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| 150 | #if SIO_USE_COMPORT
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| 151 | snprintf(fileName, 255, SIO_DEVICENAME"%lu", (DWORD)(devnum));
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| 152 | #else /* SIO_USE_COMPORT */
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| 153 | snprintf(fileName, 255, SIO_DEVICENAME"%lu", (DWORD)(devnum & ~1));
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| 154 | if ((devnum & 1) == 0) {
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| 155 | fileHandle = CreateNamedPipeA(fileName, PIPE_ACCESS_DUPLEX, PIPE_TYPE_BYTE | PIPE_NOWAIT,
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| 156 | PIPE_UNLIMITED_INSTANCES, 102400, 102400, 100, NULL);
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| 157 | } else
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| 158 | #endif /* SIO_USE_COMPORT */
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| 159 | {
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| 160 | fileHandle = CreateFileA(fileName, GENERIC_READ | GENERIC_WRITE, 0, NULL, OPEN_EXISTING, 0, NULL);
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| 161 | }
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| 162 | if (fileHandle != INVALID_HANDLE_VALUE) {
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| 163 | sio_abort = 0;
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| 164 | #if !SIO_USE_COMPORT
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| 165 | if (devnum & 1) {
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| 166 | DWORD mode = PIPE_NOWAIT;
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| 167 | if (!SetNamedPipeHandleState(fileHandle, &mode, NULL, NULL)) {
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| 168 | LWIP_DEBUGF(SIO_DEBUG, ("sio_open(%lu): SetNamedPipeHandleState failed. GetLastError() returns %d\n",
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| 169 | (DWORD)devnum, GetLastError()));
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| 170 | }
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| 171 | } else
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| 172 | #endif /* !SIO_USE_COMPORT */
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| 173 | {
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| 174 | FlushFileBuffers(fileHandle);
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| 175 | }
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| 176 | #if SIO_USE_COMPORT
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| 177 | if(!sio_setup(fileHandle)) {
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| 178 | CloseHandle(fileHandle);
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| 179 | LWIP_DEBUGF(SIO_DEBUG, ("sio_open(%lu): sio_setup failed. GetLastError() returns %lu\n",
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| 180 | (DWORD)devnum, GetLastError()));
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| 181 | return NULL;
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| 182 | }
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| 183 | #endif /* SIO_USE_COMPORT */
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| 184 | LWIP_DEBUGF(SIO_DEBUG, ("sio_open: file \"%s\" successfully opened.\n", fileName));
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| 185 | printf("sio_open: file \"%s\" (%d) successfully opened: 0x%08x\n", fileName, devnum, LWIP_PTR_NUMERIC_CAST(unsigned int, fileHandle));
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| 186 | return (sio_fd_t)(fileHandle);
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| 187 | }
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| 188 | LWIP_DEBUGF(SIO_DEBUG, ("sio_open(%lu) failed. GetLastError() returns %lu\n",
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| 189 | (DWORD)devnum, GetLastError()));
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| 190 | printf("sio_open(%lu) failed. GetLastError() returns %lu\n",
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| 191 | (DWORD)devnum, GetLastError());
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| 192 | return NULL;
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| 193 | }
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| 194 |
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| 195 | /**
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| 196 | * Sends a single character to the serial device.
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| 197 | *
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| 198 | * @param c character to send
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| 199 | * @param fd serial device handle
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| 200 | *
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| 201 | * @note This function will block until the character can be sent.
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| 202 | */
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| 203 | void sio_send(u8_t c, sio_fd_t fd)
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| 204 | {
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| 205 | DWORD dwNbBytesWritten = 0;
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| 206 | LWIP_DEBUGF(SIO_DEBUG, ("sio_send(%lu)\n", (DWORD)c));
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| 207 | while ((!WriteFile((HANDLE)(fd), &c, 1, &dwNbBytesWritten, NULL)) || (dwNbBytesWritten < 1)) {
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| 208 | }
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| 209 | }
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| 210 |
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| 211 | /**
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| 212 | * Receives a single character from the serial device.
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| 213 | *
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| 214 | * @param fd serial device handle
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| 215 | *
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| 216 | * @note This function will block until a character is received.
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| 217 | */
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| 218 | u8_t sio_recv(sio_fd_t fd)
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| 219 | {
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| 220 | DWORD dwNbBytesReadden = 0;
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| 221 | u8_t byte = 0;
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| 222 | LWIP_DEBUGF(SIO_DEBUG, ("sio_recv()\n"));
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| 223 | while ((sio_abort == 0) && ((!ReadFile((HANDLE)(fd), &byte, 1, &dwNbBytesReadden, NULL)) || (dwNbBytesReadden < 1)));
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| 224 | LWIP_DEBUGF(SIO_DEBUG, ("sio_recv()=%lu\n", (DWORD)byte));
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| 225 | return byte;
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| 226 | }
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| 227 |
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| 228 | /**
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| 229 | * Reads from the serial device.
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| 230 | *
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| 231 | * @param fd serial device handle
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| 232 | * @param data pointer to data buffer for receiving
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| 233 | * @param len maximum length (in bytes) of data to receive
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| 234 | * @return number of bytes actually received - may be 0 if aborted by sio_read_abort
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| 235 | *
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| 236 | * @note This function will block until data can be received. The blocking
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| 237 | * can be cancelled by calling sio_read_abort().
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| 238 | */
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| 239 | u32_t sio_read(sio_fd_t fd, u8_t* data, u32_t len)
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| 240 | {
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| 241 | BOOL ret;
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| 242 | DWORD dwNbBytesReadden = 0;
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| 243 | LWIP_DEBUGF(SIO_DEBUG, ("sio_read()...\n"));
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| 244 | ret = ReadFile((HANDLE)(fd), data, len, &dwNbBytesReadden, NULL);
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| 245 | LWIP_DEBUGF(SIO_DEBUG, ("sio_read()=%lu bytes -> %d\n", dwNbBytesReadden, ret));
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| 246 | LWIP_UNUSED_ARG(ret);
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| 247 | return dwNbBytesReadden;
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| 248 | }
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| 249 |
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| 250 | /**
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| 251 | * Tries to read from the serial device. Same as sio_read but returns
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| 252 | * immediately if no data is available and never blocks.
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| 253 | *
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| 254 | * @param fd serial device handle
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| 255 | * @param data pointer to data buffer for receiving
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| 256 | * @param len maximum length (in bytes) of data to receive
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| 257 | * @return number of bytes actually received
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| 258 | */
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| 259 | u32_t sio_tryread(sio_fd_t fd, u8_t* data, u32_t len)
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| 260 | {
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| 261 | /* @todo: implement non-blocking read */
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| 262 | BOOL ret;
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| 263 | DWORD dwNbBytesReadden = 0;
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| 264 | LWIP_DEBUGF(SIO_DEBUG, ("sio_read()...\n"));
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| 265 | ret = ReadFile((HANDLE)(fd), data, len, &dwNbBytesReadden, NULL);
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| 266 | LWIP_DEBUGF(SIO_DEBUG, ("sio_read()=%lu bytes -> %d\n", dwNbBytesReadden, ret));
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| 267 | LWIP_UNUSED_ARG(ret);
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| 268 | return dwNbBytesReadden;
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| 269 | }
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| 270 |
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| 271 | /**
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| 272 | * Writes to the serial device.
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| 273 | *
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| 274 | * @param fd serial device handle
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| 275 | * @param data pointer to data to send
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| 276 | * @param len length (in bytes) of data to send
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| 277 | * @return number of bytes actually sent
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| 278 | *
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| 279 | * @note This function will block until all data can be sent.
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| 280 | */
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| 281 | u32_t sio_write(sio_fd_t fd, u8_t* data, u32_t len)
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| 282 | {
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| 283 | BOOL ret;
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| 284 | DWORD dwNbBytesWritten = 0;
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| 285 | LWIP_DEBUGF(SIO_DEBUG, ("sio_write()...\n"));
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| 286 | ret = WriteFile((HANDLE)(fd), data, len, &dwNbBytesWritten, NULL);
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| 287 | LWIP_DEBUGF(SIO_DEBUG, ("sio_write()=%lu bytes -> %d\n", dwNbBytesWritten, ret));
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| 288 | LWIP_UNUSED_ARG(ret);
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| 289 | return dwNbBytesWritten;
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| 290 | }
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| 291 |
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| 292 | /**
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| 293 | * Aborts a blocking sio_read() call.
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| 294 | * @todo: This currently ignores fd and aborts all reads
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| 295 | *
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| 296 | * @param fd serial device handle
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| 297 | */
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| 298 | void sio_read_abort(sio_fd_t fd)
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| 299 | {
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| 300 | LWIP_UNUSED_ARG(fd);
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| 301 | LWIP_DEBUGF(SIO_DEBUG, ("sio_read_abort() !!!!!...\n"));
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| 302 | sio_abort = 1;
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| 303 | return;
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| 304 | }
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