Отпечатай - Kak da otvorq Comm Port

Титла: Kak da otvorq Comm Port
Публикувано от: sgeorgiev в Jan 31, 2009, 17:31

Zdraveite.

Vyprosa mi e kak se otvarqt Comm portove pod Linux. Ima li programa v linux podobna na Hiperterminala pod Windows.

Ima li fail v /dev s koito moga da rabotq.

Molq ako razpolagate s nqkoq statiq ili drugi materiali svyrzani s nachina na upotreba na Comm pod Linux daite link.

Blagodarq vi predvaritelno,

Титла: Re: Kak da otvorq Comm Port
Публикувано от: tarator в Jan 31, 2009, 18:29

COM1 е /dev/ttyS0. Ако използваш някакъв USB конвертор /dev/ttyUSB0.

Аз използвам minicom, може би има по-добри програми, но с тази съм свикнал.

Титла: Re: Kak da otvorq Comm Port
Публикувано от: Slevin_ в Jan 31, 2009, 22:34

tarator ти е отогворил. Аз също ползвам minicom.
Ако държиш на GUI, то потърси cutecom.

Титла: Re: Kak da otvorq Comm Port
Публикувано от: sgeorgiev в Feb 05, 2009, 11:42

Blagodarq vi za informaciqta.

Opitah da napisha sobstvena programka koqto da otvarq comm kato file, no ne uspah da namerq nachin da setna BITS PER SEC i stop bita.

Molq ako razpolagate s nqkoi tutorial ili drugi materiali kak stava pishte.

Титла: Re: Kak da otvorq Comm Port
Публикувано от: BULFON в Feb 05, 2009, 12:11

http://www.comptechdoc.org/os/linux/programming/c/linux_pgcserial.html

http://www.faqs.org/docs/Linux-mini/IO-Port-Programming.html

Код

GeSHi (C):
/*
 * example.c: very simple example of port I/O
 *
 * This code does nothing useful, just a port write, a pause,
 * and a port read. Compile with `gcc -O2 -o example example.c',
 * and run as root with `./example'.
 */
 
#include <stdio.h>
#include <unistd.h>
#include <asm/io.h>
 
#define BASEPORT 0x378 /* lp1 */
 
int main()
{
  /* Get access to the ports */
  if (ioperm(BASEPORT, 3, 1)) {perror("ioperm"); exit(1);}
 
  /* Set the data signals (D0-7) of the port to all low (0) */
  outb(0, BASEPORT);
 
  /* Sleep for a while (100 ms) */
  usleep(100000);
 
  /* Read from the status port (BASE+1) and display the result */
  printf("status: %d\n", inb(BASEPORT + 1));
 
  /* We don't need the ports anymore */
  if (ioperm(BASEPORT, 3, 0)) {perror("ioperm"); exit(1);}
 
  exit(0);
}
 
/* end of example.c */

Последно, но не на последно място:
http://www.google.bg/search?q=linux+com+port+c+program&ie=utf-8&oe=utf-8&aq=t&rls=org.mozilla:en-US:official&client=firefox-a

Титла: Re: Kak da otvorq Comm Port
Публикувано от: sgeorgiev в Feb 06, 2009, 08:25

Blagodarq vi za linkovete. Programata se poluchi mnogo oprostena.

Код:

#include <stdio.h>
#include <sys/types.h>
#include <fcntl.h>
#include <termios.h>
#include <string.h>

void sendCommand(int fd, char *command, char *result, int size)
{
	int i = 0;
	memset(result, 0, size);
	write(fd, command, strlen(command));
	char p;
	char c;
	do
	{
		p = c;
		c = '\0';
		int res = read(fd, &c, 1);
		if(res > 0)
		{
			result[i] = c;
			i++;
		}
	}while(p != 'K');
}

int main()
{
	long BAUD = B4800;                      // derived baud rate from command line
	long DATABITS = CS8;
	long STOPBITS = 0;
	long PARITYON = 00;
	long PARITY = 00;

	struct termios newtio;
	int fd = open("/dev/ttyUSB0", O_RDWR | O_NOCTTY | O_NONBLOCK);
	if(fd < 0)printf("Error!!!\n");

	fcntl(fd, F_SETOWN, getpid());

	newtio.c_cflag = BAUD | CRTSCTS | DATABITS | STOPBITS | PARITYON | PARITY | CLOCAL | CREAD;
	newtio.c_iflag = IGNPAR;
	newtio.c_oflag = 0;
	newtio.c_lflag = 0;       //ICANON;
	newtio.c_cc[VMIN]=1;
	newtio.c_cc[VTIME]=1;
	tcflush(fd, TCIFLUSH);
	tcsetattr(fd,TCSANOW,&newtio);

	char result[128];
	int i;
	for(i=0; i<20; i++)
	{
		sendCommand(fd, "AON\r", result, sizeof(result));
		printf("RESULT: %s\n", result);
		sendCommand(fd, "BON\r", result, sizeof(result));
		printf("RESULT: %s\n", result);
		sendCommand(fd, "CON\r", result, sizeof(result));
		printf("RESULT: %s\n", result);
		sendCommand(fd, "DON\r", result, sizeof(result));
		printf("RESULT: %s\n", result);
		sendCommand(fd, "EON\r", result, sizeof(result));
		printf("RESULT: %s\n", result);
		sendCommand(fd, "FON\r", result, sizeof(result));
		printf("RESULT: %s\n", result);
		sendCommand(fd, "GON\r", result, sizeof(result));
		printf("RESULT: %s\n", result);
		sendCommand(fd, "STATE\r", result, sizeof(result));
		printf("RESULT: %s\n", result);
	
		sendCommand(fd, "AOFF\r", result, sizeof(result));
		printf("RESULT: %s\n", result);
		sendCommand(fd, "BOFF\r", result, sizeof(result));
		printf("RESULT: %s\n", result);
		sendCommand(fd, "COFF\r", result, sizeof(result));
		printf("RESULT: %s\n", result);
		sendCommand(fd, "DOFF\r", result, sizeof(result));
		printf("RESULT: %s\n", result);
		sendCommand(fd, "EOFF\r", result, sizeof(result));
		printf("RESULT: %s\n", result);
		sendCommand(fd, "FOFF\r", result, sizeof(result));
		printf("RESULT: %s\n", result);
		sendCommand(fd, "GOFF\r", result, sizeof(result));
		printf("RESULT: %s\n", result);
		sendCommand(fd, "STATE\r", result, sizeof(result));
		printf("RESULT: %s\n", result);
	
		sendCommand(fd, "AIN\r", result, sizeof(result));
		printf("RESULT: %s\n", result);
	
		sendCommand(fd, "DIN\r", result, sizeof(result));
		printf("RESULT: %s\n", result);
	
		sendCommand(fd, "ERROR\r", result, sizeof(result));
		printf("RESULT: %s\n", result);
        }
	return 0;
}

Publicuvam coda ako nqkoi drug se sblyska s takyv problem nadqvam se da mu pomogne.

Linux за българи: Форуми

Linux секция за напреднали => Хардуерни и софтуерни проблеми => Темата е започната от: sgeorgiev в Jan 31, 2009, 17:31