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/*
* avrdude - A Downloader/Uploader for AVR device programmers
* Copyright (C) 2003, 2004 Martin J. Thomas <mthomas@rhrk.uni-kl.de>
* Copyright (C) 2005 Michael Holzt <kju-avr@fqdn.org>
* Copyright (C) 2005 Joerg Wunsch <j@uriah.heep.sax.de>
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
*/
/* $Id: serbb_win32.cpp,v 1.1 2007/02/18 06:11:30 lady_ada Exp $ */
/*
* Win32 serial bitbanging interface for avrdude.
*/
#if defined(WIN32NATIVE)
#include <windows.h>
#include <stdio.h>
#include "serbb.h"
#define verbose 0
/* cached status lines */
static int dtr, rts, txd;
#define W32SERBUFSIZE 1024
/*
serial port/pin mapping
1 cd <-
2 rxd <-
3 txd ->
4 dtr ->
5 dsr <-
6 rts ->
7 cts <-
Negative pin # means negated value.
*/
int serbb_setpin(int fd, int pin, int value)
{
HANDLE hComPort = (HANDLE)fd;
LPVOID lpMsgBuf;
DWORD dwFunc;
const char *name;
if (pin < 1 || pin > 7)
return -1;
pin--;
switch (pin)
{
case 2: /* txd */
dwFunc = value? SETBREAK: CLRBREAK;
name = value? "SETBREAK": "CLRBREAK";
txd = value;
break;
case 3: /* dtr */
dwFunc = value? SETDTR: CLRDTR;
name = value? "SETDTR": "CLRDTR";
dtr = value;
break;
case 5: /* rts */
dwFunc = value? SETRTS: CLRRTS;
name = value? "SETRTS": "CLRRTS";
break;
default:
if (verbose)
fprintf(stderr,
"serbb_setpin(): unknown pin %d\n", pin + 1);
return -1;
}
//usleep(1000);
//printf("delay %d\n\r", pgm->bb_delay);
if (verbose > 4)
fprintf(stderr,
"serbb_setpin(): EscapeCommFunction(%s)\n", name);
if (!EscapeCommFunction(hComPort, dwFunc))
{
FormatMessage(
FORMAT_MESSAGE_ALLOCATE_BUFFER |
FORMAT_MESSAGE_FROM_SYSTEM |
FORMAT_MESSAGE_IGNORE_INSERTS,
NULL,
GetLastError(),
MAKELANGID(LANG_NEUTRAL, SUBLANG_DEFAULT), // Default language
(LPTSTR) &lpMsgBuf,
0,
NULL);
fprintf(stderr,
"serbb_setpin(): SetCommState() failed: %s\n",
(char *)lpMsgBuf);
CloseHandle(hComPort);
LocalFree(lpMsgBuf);
exit(1);
}
return 0;
}
int serbb_getpin(int fd, int pin)
{
HANDLE hComPort = (HANDLE)fd;
LPVOID lpMsgBuf;
int invert, rv;
const char *name;
DWORD modemstate;
invert = 0;
if (pin < 1 || pin > 7)
return -1;
pin --;
if (pin == 0 /* cd */ || pin == 4 /* dsr */ || pin == 6 /* cts */)
{
if (!GetCommModemStatus(hComPort, &modemstate))
{
FormatMessage(
FORMAT_MESSAGE_ALLOCATE_BUFFER |
FORMAT_MESSAGE_FROM_SYSTEM |
FORMAT_MESSAGE_IGNORE_INSERTS,
NULL,
GetLastError(),
MAKELANGID(LANG_NEUTRAL, SUBLANG_DEFAULT), // Default language
(LPTSTR) &lpMsgBuf,
0,
NULL);
fprintf(stderr,
"serbb_setpin(): GetCommModemStatus() failed: %s\n",
(char *)lpMsgBuf);
CloseHandle(hComPort);
LocalFree(lpMsgBuf);
exit(1);
}
if (verbose > 4)
fprintf(stderr,
"serbb_getpin(): GetCommState() => 0x%lx\n",
modemstate);
switch (pin)
{
case 0:
modemstate &= MS_RLSD_ON;
break;
case 4:
modemstate &= MS_DSR_ON;
break;
case 6:
modemstate &= MS_CTS_ON;
break;
}
rv = modemstate != 0;
if (invert)
rv = !rv;
return rv;
}
switch (pin)
{
case 2: /* txd */
rv = txd;
name = "TXD";
break;
case 3: /* dtr */
rv = dtr;
name = "DTR";
break;
case 5: /* rts */
rv = rts;
name = "RTS";
break;
default:
if (verbose)
fprintf(stderr,
" serbb_getpin(): unknown pin %d\n", pin + 1);
return -1;
}
if (verbose > 4)
fprintf(stderr,
"serbb_getpin(): return cached state for %s\n",
name);
if (invert)
rv = !rv;
return rv;
}
int serbb_open(char *port)
{
DCB dcb;
LPVOID lpMsgBuf;
HANDLE hComPort = INVALID_HANDLE_VALUE;
hComPort = CreateFile(port, GENERIC_READ | GENERIC_WRITE, 0, NULL,
OPEN_EXISTING, FILE_ATTRIBUTE_NORMAL, NULL);
if (hComPort == INVALID_HANDLE_VALUE) {
FormatMessage(
FORMAT_MESSAGE_ALLOCATE_BUFFER |
FORMAT_MESSAGE_FROM_SYSTEM |
FORMAT_MESSAGE_IGNORE_INSERTS,
NULL,
GetLastError(),
MAKELANGID(LANG_NEUTRAL, SUBLANG_DEFAULT), // Default language
(LPTSTR) &lpMsgBuf,
0,
NULL);
fprintf(stderr, "ser_open(): can't open device \"%s\": %s\n",
port, (char*)lpMsgBuf);
LocalFree(lpMsgBuf);
return -1;
}
if (!SetupComm(hComPort, W32SERBUFSIZE, W32SERBUFSIZE))
{
CloseHandle(hComPort);
fprintf(stderr, "ser_open(): can't set buffers for \"%s\"\n",
port);
return -1;
}
ZeroMemory(&dcb, sizeof(DCB));
dcb.DCBlength = sizeof(DCB);
dcb.BaudRate = CBR_9600;
dcb.fBinary = 1;
dcb.fDtrControl = DTR_CONTROL_DISABLE;
dcb.fRtsControl = RTS_CONTROL_DISABLE;
dcb.ByteSize = 8;
dcb.Parity = NOPARITY;
dcb.StopBits = ONESTOPBIT;
if (!SetCommState(hComPort, &dcb))
{
CloseHandle(hComPort);
fprintf(stderr, "ser_open(): can't set com-state for \"%s\"\n",
port);
return -1;
}
if (verbose > 2)
fprintf(stderr,
"ser_open(): opened comm port \"%s\", handle 0x%x\n",
port, (int)hComPort);
dtr = rts = txd = 0;
return (int)hComPort;
}
void serbb_close(int fd)
{
HANDLE hComPort=(HANDLE)fd;
if (hComPort != INVALID_HANDLE_VALUE)
CloseHandle (hComPort);
if (verbose > 2)
fprintf(stderr,
"ser_close(): closed comm port handle 0x%x\n",
(int)hComPort);
hComPort = INVALID_HANDLE_VALUE;
}
#endif /* WIN32NATIVE */
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