Cschalle: Fix spelling of category

2011-10-27T20:34:52Z

Fix spelling of category

Peter Huewe at 14:11, 27 October 2011

2011-10-27T14:11:37Z

Peter Huewe: AC

2011-10-27T14:10:46Z

SpaceMonkey at 14:46, 14 June 2007

2007-06-14T14:46:12Z

New page

This is a handy, simple terminal program to talk to your EVM from the command line.

<code><pre>

#include <termios.h>
#include <stdio.h>
#include <unistd.h>
#include <fcntl.h>
#include <sys/signal.h>
#include <sys/types.h>
#include <sys/ioctl.h>

int transfer_byte(int from, int to, int is_control);

typedef struct {char *name; int flag; } speed_spec;

void print_status(int fd) {
int status;
unsigned int arg;
status = ioctl(fd, TIOCMGET, &arg);
fprintf(stderr, "[STATUS]: ");
if(arg & TIOCM_RTS) fprintf(stderr, "RTS ");
if(arg & TIOCM_CTS) fprintf(stderr, "CTS ");
if(arg & TIOCM_DSR) fprintf(stderr, "DSR ");
if(arg & TIOCM_CAR) fprintf(stderr, "DCD ");
if(arg & TIOCM_DTR) fprintf(stderr, "DTR ");
if(arg & TIOCM_RNG) fprintf(stderr, "RI ");
fprintf(stderr, "\r\n");
}

main(int argc, char *argv[])
{
int comfd;
struct termios oldtio, newtio; //place for old and new port settings for serial port
struct termios oldkey, newkey; //place tor old and new port settings for keyboard teletype
char *devicename = argv[1];
int need_exit = 0;
speed_spec speeds[] =
{
{"1200", B1200},
{"2400", B2400},
{"4800", B4800},
{"9600", B9600},
{"19200", B19200},
{"38400", B38400},
{"57600", B57600},
{"115200", B115200},
{NULL, 0}
};
int speed = B115200;

fprintf(stderr,"\nTTY Comms Interface\n\n");

if(argc < 2) {
fprintf(stderr, "example: %s /dev/ttyS0 [115200]\n", argv[0]);
fprintf(stderr, "Defaulting to /dev/ttyUSB0 at 115200\n");
devicename="/dev/ttyUSB0";
}

comfd = open(devicename, O_RDWR | O_NOCTTY | O_NONBLOCK);
if (comfd < 0)
{
perror(devicename);
exit(-1);
}

if(argc > 2) {
speed_spec *s;
for(s = speeds; s->name; s++) {
if(strcmp(s->name, argv[2]) == 0) {
speed = s->flag;
fprintf(stderr, "setting speed %s\n", s->name);
break;
}
}
}

fprintf(stderr, "CTRL-a exit, CTRL-x modem lines status\n");

tcgetattr(STDIN_FILENO,&oldkey);
newkey.c_cflag = speed | CRTSCTS | CS8 | CLOCAL | CREAD;
newkey.c_iflag = IGNPAR;
newkey.c_oflag = 0;
newkey.c_lflag = 0;
newkey.c_cc[VMIN]=1;
newkey.c_cc[VTIME]=0;
tcflush(STDIN_FILENO, TCIFLUSH);
tcsetattr(STDIN_FILENO,TCSANOW,&newkey);

tcgetattr(comfd,&oldtio); // save current port settings
newtio.c_cflag = B115200 | CS8 | CREAD;
newtio.c_iflag = IGNPAR;
newtio.c_oflag = 0;
newtio.c_lflag = 0;
newtio.c_cc[VMIN]=1;
newtio.c_cc[VTIME]=0;
tcflush(comfd, TCIFLUSH);
tcsetattr(comfd,TCSANOW,&newtio);

print_status(comfd);

while(!need_exit) {
fd_set fds;
int ret;

FD_ZERO(&fds);
FD_SET(STDIN_FILENO, &fds);
FD_SET(comfd, &fds);

ret = select(comfd+1, &fds, NULL, NULL, NULL);
if(ret == -1) {
perror("select");
} else if (ret > 0) {
if(FD_ISSET(STDIN_FILENO, &fds)) {
need_exit = transfer_byte(STDIN_FILENO, comfd, 1);
} else if(FD_ISSET(comfd, &fds)) {
need_exit = transfer_byte(comfd, STDIN_FILENO, 0);
}
}
}

tcsetattr(comfd,TCSANOW,&oldtio);
tcsetattr(STDIN_FILENO,TCSANOW,&oldkey);
close(comfd);
}

int transfer_byte(int from, int to, int is_control) {
char c;
int ret;
ret = read(from, &c, 1);
if(ret == 1) {
if(is_control) {
if(c == '\x01') { // C-a
return -1;
} else if(c == '\x18') { // C-x
print_status(to);
return 0;
}
}
if(write(to, &c, 1) != 1) {
perror("write failed");
}
}
return 0;
}

</pre>
</code>

← Older revision		Revision as of 20:34, 27 October 2011
Line 155:		Line 155:
	</code>		</code>

−	[[Category:~~Davinci~~]]	+	[[Category:DaVinci]]

← Older revision		Revision as of 14:11, 27 October 2011
Line 155:		Line 155:
	</code>		</code>

−	[[Category:~~DaVinci~~]]	+	[[Category:Davinci]]

← Older revision		Revision as of 14:10, 27 October 2011
Line 154:		Line 154:
	</pre>		</pre>
	</code>		</code>
		+
		+	[[Category:DaVinci]]

EVM comz.c - Revision history

Cschalle: Fix spelling of category

Peter Huewe at 14:11, 27 October 2011

Peter Huewe: AC

SpaceMonkey at 14:46, 14 June 2007