1
0
mirror of git://projects.qi-hardware.com/ben-blinkenlights.git synced 2024-11-17 00:40:43 +02:00
ben-blinkenlights/swuart-chat/chat.c
2012-12-31 19:28:46 -03:00

114 lines
2.0 KiB
C

/*
* swuart-chat/chat.c - Simple two-way chat using swuart
*
* Written 2012 by Werner Almesberger
* Copyright 2012 Werner Almesberger
*
* 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.
*/
#include <stdlib.h>
#include <stdio.h>
#include <unistd.h>
#include <string.h>
#include <termios.h>
#include <fcntl.h>
#include <errno.h>
#include <ubb/ubb.h>
#include <ubb/swuart.h>
#define RX UBB_DAT0
#define TX UBB_DAT1
/* ----- TTY raw mode ------------------------------------------------------ */
static struct termios old_term;
static void raw(void)
{
struct termios term;
if (tcgetattr(0, &old_term) < 0) {
perror("tcgetattr");
exit(1);
}
term = old_term;
cfmakeraw(&term);
if (tcsetattr(0, TCSAFLUSH, &term) < 0) {
perror("tcsetattr");
exit(1);
}
if (fcntl(0, F_SETFL, O_NONBLOCK) < 0) {
perror("fcntl");
exit(1);
}
}
static void restore_term(void)
{
if (tcsetattr(0, TCSAFLUSH, &old_term) < 0)
perror("tcsetattr");
}
static void at_exit(void)
{
restore_term();
swuart_close();
ubb_close(0);
}
int main(int argc, char **argv)
{
uint8_t local[10], remote[100];
int got, i;
if (ubb_open(0) < 0) {
perror("ubb_open");
exit(1);
}
atexit(at_exit);
raw();
if (swuart_open(TX, RX, 38400) < 0) {
perror("swuart_open");
exit(1);
}
while (1) {
got = read(0, local, sizeof(local));
if (got < 0 && errno == EAGAIN)
got = 0;
if (got < 0) {
perror("read");
exit(1);
}
if (memchr(local, 3, got))
break;
got = swuart_trx(local, got, remote, sizeof(remote),
1000, 100);
for (i = 0; i != got; i++)
if (remote[i] >= ' ' && remote[i] <= '~')
printf("%c", remote[i]);
else if (remote[i] == 13)
printf("\r\n");
else if (remote[i] == 8 || remote[i] == 127)
printf("\b \b");
else
printf("\\%02o", remote[i]);
fflush(stdout);
}
printf("\r\n");
return 0;
}