?
Hier ein CPP-Code für Win
/*
* Version 1.0
* <hdieterm yahoo de>
*/
/*
* list of return codes:
* 00 Success
* 01 User Interrupt (Esc-Key)
* 02 Timeout
* 03 COM not open
* 04 COM is allready open
* 05 COM wrong interrupt
* 06 COM wrong baud rate
* 07 COM no char received
* 08 COM WriteFile error
* 09 COM ReadFile error
* 10 COM CreateFileA error
* 11 COM GetCommState error
* 12 COM SetCommState error
* 13 COM GetCommTimeouts error
* 14 COM SetCommTimeouts error
* 15 COM PurgeComm error
* 16 COM PeekNamedPipe error
* 20 COM unknown error message
*/
#include "stdafx.h"
#include "rs232win.h"
#include "time.h"
static HANDLE hCom = INVALID_HANDLE_VALUE;
static int port_open = 0; /* 0 = closed 1 = open */
static int comerror = 0;
static double timeout_default;
const char *comerror_description(int ret)
{
static char tmp[64];
switch (ret) {
case 0: sprintf(tmp,"00 Success"); break;
case 1: sprintf(tmp,"01 User Interrupt (Esc-Key)"); break;
case 2: sprintf(tmp,"02 Timeout"); break;
case 3: sprintf(tmp,"03 COM not open"); break;
case 4: sprintf(tmp,"04 COM is allready open"); break;
case 5: sprintf(tmp,"05 COM wrong interrupt"); break;
case 6: sprintf(tmp,"06 COM wrong baud rate"); break;
case 7: sprintf(tmp,"07 COM no char received"); break;
case 8: sprintf(tmp,"08 COM WriteFile error"); break;
case 9: sprintf(tmp,"09 COM ReadFile error"); break;
case 10: sprintf(tmp,"10 COM CreateFileA error"); break;
case 11: sprintf(tmp,"11 COM GetCommState error"); break;
case 12: sprintf(tmp,"12 COM SetCommState error"); break;
case 13: sprintf(tmp,"13 COM GetCommTimeouts error"); break;
case 14: sprintf(tmp,"14 COM SetCommTimeouts error"); break;
case 15: sprintf(tmp,"15 COM PurgeComm error"); break;
case 16: sprintf(tmp,"16 COM PeekNamedPipe error"); break;
default: sprintf(tmp,"20 COM unknown error message"); break;
}
return &tmp[0];
}
int comsetreadtimeout(double timeout)
{
COMMTIMEOUTS cto;
memset(&cto, 0, sizeof(cto));
if (!GetCommTimeouts(hCom, &cto)) {
comerror = 13;
goto out;
}
cto.ReadTotalTimeoutConstant = (unsigned int)(timeout * 1000);
cto.WriteTotalTimeoutConstant = 0;
if (!SetCommTimeouts(hCom, &cto)) {
comerror = 14;
goto out;
}
comerror = 0;
out:
return comerror;
}
int cominit(char *port, int speed)
{
DCB dcb;
if (port_open == 1) {
comerror = 4;
goto out;
}
hCom = CreateFileA(port, GENERIC_READ|GENERIC_WRITE, 0, NULL, OPEN_EXISTING, 0, NULL);
if (hCom == INVALID_HANDLE_VALUE) {
comerror = 10;
goto out;
}
if (!GetCommState(hCom, &dcb)) {
comerror = 11;
goto out;
}
/* Fill in DCB: (speed) bps, 8 data bits, no parity, and 1 stop bit. */
dcb.BaudRate = speed; /* set the baud rate */
dcb.ByteSize = 8; /* data size, xmit, and rcv */
dcb.Parity = NOPARITY; /* no parity bit */
dcb.StopBits = ONESTOPBIT; /* one stop bit */
if (!SetCommState(hCom, &dcb)) {
comerror = 12;
goto out;
}
timeout_default = 0.8; /* 0.8 seconds */
comerror = comsetreadtimeout(timeout_default);
if (comerror) goto out;
port_open = 1;
comerror = 0;
out:
return comerror;
}
int comclose(void)
{
if (port_open == 0) {
comerror = 3;
goto out;
}
CloseHandle(hCom);
hCom = INVALID_HANDLE_VALUE;
port_open = 0;
comerror = 0;
out:
return comerror;
}
int comflush()
{
if (port_open == 0) {
comerror = 3;
goto out;
}
if (!PurgeComm(hCom,PURGE_TXCLEAR)) {
comerror = 15;
goto out;
}
if (!PurgeComm(hCom,PURGE_RXCLEAR)) {
comerror = 15;
goto out;
}
comerror = 0;
out:
return comerror;
}
int comreadline(char tmp[], unsigned int maxsize)
{
unsigned long ret_bytes;
unsigned int i = 0;
unsigned char b;
int c;
if (port_open == 0) {
comerror = 3;
goto out;
}
for (;;) {
ret_bytes = 0;
if (!ReadFile(hCom, &b, 1, &ret_bytes, NULL)) {
comerror = 9;
goto out;
}
if (ret_bytes == 1) {
if (b == 13) break;
tmp[i++] = b;
if (i == maxsize) break;
}
if (_kbhit()) {
c = _getch();
if (c == 27) {
comerror = 1;
goto out;
}
}
}
tmp[i] = 0;
comerror = 0;
return comerror;
out:
tmp[0] = 0;
return comerror;
}
int comwriteline(const char tmp[])
{
unsigned long ret_bytes = 0;
unsigned long i = 0;
if (port_open == 0) {
comerror = 3;
goto out;
}
comerror = comwritebyte(13);
if (comerror) goto out;
comerror = comwritebyte(10);
if (comerror) goto out;
while (tmp[i] != 0) {
i++;
}
ret_bytes = 0;
if (!WriteFile(hCom,tmp,i,&ret_bytes,NULL)) {
comerror = 8;
goto out;
}
if (ret_bytes != i) {
comerror = 8;
goto out;
}
comerror = 0;
out:
return comerror;
}
int comread(unsigned char tmp[], unsigned int nsize)
{
unsigned long ret_bytes;
unsigned int i = 0;
int c;
if (port_open == 0) {
comerror = 3;
goto out;
}
for (;;) {
ret_bytes = 0;
if (!ReadFile(hCom, &tmp[i], nsize - i, &ret_bytes, NULL)) {
comerror = 9;
goto out;
}
i += ret_bytes;
if (i == nsize) break;
if (_kbhit()) {
c = _getch();
if (c == 27) {
comerror = 1;
goto out;
}
}
}
comerror = 0;
out:
return comerror;
}
int comread_timeout(unsigned char tmp[], unsigned int nsize, int timeout)
{
unsigned long ret_bytes;
unsigned int i = 0;
int c;
clock_t timestart, timeend;
if (port_open == 0) {
comerror = 3;
goto out;
}
timestart = clock();
for (;;) {
ret_bytes = 0;
if (!ReadFile(hCom, &tmp[i], nsize - i, &ret_bytes, NULL)) {
comerror = 9;
goto out;
}
i += ret_bytes;
if (i == nsize) break;
timeend = clock();
if (((timeend - timestart) / CLK_TCK) > 1) {
timestart = clock();
timeout--;
}
if (timeout == 0) {
comerror = 2;
goto out;
}
if (_kbhit()) {
c = _getch();
if (c == 27) {
comerror = 1;
goto out;
}
}
}
comerror = 0;
out:
return comerror;
}
int comreadbyte(unsigned char *tmp)
{
unsigned long ret_bytes;
int c;
if (port_open == 0) {
comerror = 3;
goto out;
}
for (;;) {
ret_bytes = 0;
if (!ReadFile(hCom, tmp, 1, &ret_bytes, NULL)) {
comerror = 9;
goto out;
}
if (ret_bytes == 1) break;
if (_kbhit()) {
c = _getch();
if (c == 27) {
comerror = 1;
goto out;
}
}
}
comerror = 0;
out:
return comerror;
}
int comreadbyte_timeout(unsigned char *tmp, int timeout)
{
unsigned long ret_bytes;
int c;
clock_t timestart, timeend;
if (port_open == 0) {
comerror = 3;
goto out;
}
timestart = clock();
for (;;) {
ret_bytes = 0;
if (!ReadFile(hCom, tmp, 1, &ret_bytes, NULL)) {
comerror = 9;
goto out;
}
if (ret_bytes == 1) break;
timeend = clock();
if (((timeend - timestart) / CLK_TCK) > 1) {
timestart = clock();
timeout--;
}
if (timeout == 0) {
comerror = 2;
goto out;
}
if (_kbhit()) {
c = _getch();
if (c == 27) {
comerror = 1;
goto out;
}
}
}
comerror = 0;
out:
return comerror;
}
int comreadbyte_nowait(unsigned char *tmp)
{
unsigned long ret_bytes;
if (port_open == 0) {
comerror = 3;
goto out;
}
ret_bytes = 0;
if (!ReadFile(hCom, tmp, 1, &ret_bytes, NULL)) {
comerror = 9;
goto out;
}
if (ret_bytes == 0) {
comerror = 9;
goto out;
}
comerror = 0;
out:
return comerror;
}
int comwrite(const unsigned char tmp[], unsigned int nsize)
{
unsigned long ret_bytes;
if (port_open == 0) {
comerror = 3;
goto out;
}
ret_bytes = 0;
if (!WriteFile(hCom,tmp,nsize,&ret_bytes,NULL)) {
comerror = 8;
goto out;
}
if (ret_bytes != nsize) {
comerror = 8;
goto out;
}
comerror = 0;
out:
return comerror;
}
int comwritebyte(const unsigned char tmp)
{
unsigned long ret_bytes;
if (port_open == 0) {
comerror = 3;
goto out;
}
ret_bytes = 0;
if (!WriteFile(hCom,&tmp,1,&ret_bytes,NULL)) {
comerror = 8;
goto out;
}
if (ret_bytes != 1) {
comerror = 8;
goto out;
}
comerror = 0;
out:
return comerror;
}
und die header datei:
/*
* Version 1.0
* <hdieterm yahoo de>
*/
#include "windows.h"
#include "stdio.h"
#include "conio.h"
#ifndef _RS232WIN_H_
#define _RS232WIN_H_ 1
/*
* list of return codes:
* 00 Success
* 01 User Interrupt (Esc-Key)
* 02 Timeout
* 03 COM not open
* 04 COM is allready open
* 05 COM wrong interrupt
* 06 COM wrong baud rate
* 07 COM no char received
* 08 COM WriteFile error
* 09 COM ReadFile error
* 10 COM CreateFileA error
* 11 COM GetCommState error
* 12 COM SetCommState error
* 13 COM GetCommTimeouts error
* 14 COM SetCommTimeouts error
* 15 COM PurgeComm error
* 16 COM PeekNamedPipe error
* 20 COM unknown error message
*/
const char *comerror_description(int ret);
int cominit(char *port, int speed);
int comclose(void);
int comflush(void);
int comreadline(char tmp[], unsigned int maxsize);
int comwriteline(const char tmp[]);
int comread(unsigned char tmp[], unsigned int nsize);
int comread_timeout(unsigned char tmp[], unsigned int nsize, int timeout);
int comwrite(const unsigned char tmp[], unsigned int nsize);
int comreadbyte(unsigned char *tmp);
int comwritebyte(const unsigned char tmp);
int comreadbyte_nowait(unsigned char *tmp);
int comreadbyte_timeout(unsigned char *tmp, int timeout);
#endif
Ich habe auch eine Version für DOS (C-Code)
Bei Bedarf werde ich diesen veröffentlichen
