mirror of
git://projects.qi-hardware.com/ben-blinkenlights.git
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114 lines
2.0 KiB
C
114 lines
2.0 KiB
C
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/*
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* swuart-chat/chat.c - Simple two-way chat using swuart
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*
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* Written 2012 by Werner Almesberger
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* Copyright 2012 Werner Almesberger
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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*/
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#include <stdlib.h>
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#include <stdio.h>
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#include <unistd.h>
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#include <string.h>
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#include <termios.h>
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#include <fcntl.h>
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#include <errno.h>
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#include <ubb/ubb.h>
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#include <ubb/swuart.h>
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#define RX UBB_DAT0
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#define TX UBB_DAT1
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/* ----- TTY raw mode ------------------------------------------------------ */
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static struct termios old_term;
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static void raw(void)
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{
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struct termios term;
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if (tcgetattr(0, &old_term) < 0) {
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perror("tcgetattr");
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exit(1);
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}
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term = old_term;
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cfmakeraw(&term);
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if (tcsetattr(0, TCSAFLUSH, &term) < 0) {
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perror("tcsetattr");
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exit(1);
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}
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if (fcntl(0, F_SETFL, O_NONBLOCK) < 0) {
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perror("fcntl");
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exit(1);
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}
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}
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static void restore_term(void)
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{
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if (tcsetattr(0, TCSAFLUSH, &old_term) < 0)
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perror("tcsetattr");
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}
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static void at_exit(void)
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{
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restore_term();
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swuart_close();
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ubb_close(0);
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}
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int main(int argc, char **argv)
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{
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uint8_t local[10], remote[100];
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int got, i;
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if (ubb_open(0) < 0) {
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perror("ubb_open");
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exit(1);
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}
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atexit(at_exit);
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raw();
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if (swuart_open(TX, RX, 38400) < 0) {
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perror("swuart_open");
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exit(1);
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}
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while (1) {
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got = read(0, local, sizeof(local));
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if (got < 0 && errno == EAGAIN)
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got = 0;
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if (got < 0) {
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perror("read");
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exit(1);
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}
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if (memchr(local, 3, got))
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break;
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got = swuart_trx(local, got, remote, sizeof(remote),
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1000, 100);
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for (i = 0; i != got; i++)
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if (remote[i] >= ' ' && remote[i] <= '~')
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printf("%c", remote[i]);
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else if (remote[i] == 13)
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printf("\r\n");
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else if (remote[i] == 8 || remote[i] == 127)
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printf("\b \b");
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else
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printf("\\%02o", remote[i]);
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fflush(stdout);
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}
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printf("\r\n");
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return 0;
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}
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