60 lines
1.0 KiB
C
60 lines
1.0 KiB
C
#include <stdio.h>
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#ifndef WINDOWS
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#include <sys/select.h>
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#include <unistd.h>
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#include <termios.h>
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#include <stdbool.h>
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#include <stdlib.h>
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static struct termios saved_tios;
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static bool is_terminal = false;
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static void exit_handler(void) {
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if (is_terminal)
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tcsetattr(0, TCSANOW, &saved_tios);
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}
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void serial_init(void) {
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struct termios tios;
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if (tcgetattr(0, &tios) != -1) {
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is_terminal = 1;
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saved_tios = tios;
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atexit(exit_handler);
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}
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if (is_terminal) {
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tios.c_lflag &= ~(ICANON|ECHO);
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tcsetattr(0, TCSANOW, &tios);
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}
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}
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int serial_get(void) {
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fd_set readfds;
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int fd = STDIN_FILENO;
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struct timeval tm = { 0, 0 };
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FD_ZERO(&readfds);
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FD_SET(fd, &readfds);
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int ready = select(fd + 1, &readfds, NULL, NULL, &tm);
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if (ready == 1 && FD_ISSET(fd, &readfds)) {
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char c;
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int ret = read(fd, &c, 1);
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if (ret == 1)
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return c;
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}
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return 0;
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}
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#endif
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void serial_put(int value) {
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putchar((int) value);
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fflush(stdout);
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}
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