| 1 | #include <stdio.h> |
| 2 | #include <fcntl.h> |
| 3 | #include <asm-generic/ioctls.h> |
| 4 | #include <unistd.h> |
| 5 | |
| 6 | /* Pulse DTR (Harvie 2o1o) |
| 7 | * This can be used eg.: for reseting Arduino |
| 8 | * |
| 9 | * make serial-pulse-dtr |
| 10 | * ./serial-pulse-dtr /dev/ttyUSB0 |
| 11 | * |
| 12 | * (-; peace ;-) |
| 13 | */ |
| 14 | |
| 15 | int main(int argc, char *argv[]) { |
| 16 | if(argc < 2) printf("Usage: %s [/dev/tty*]\n", argv[0]); |
| 17 | |
| 18 | int fd = open(argv[1], O_WRONLY); |
| 19 | perror(argv[0]); |
| 20 | |
| 21 | //DTR HIGH |
| 22 | //ioctl(fd, TIOCSDTR); |
| 23 | ioctl(fd, TIOCMBIS); |
| 24 | |
| 25 | //Wait |
| 26 | //system("sleep 0.1"); |
| 27 | usleep(100000); |
| 28 | |
| 29 | //DTR LOW |
| 30 | //ioctl(fd, TIOCCDTR); |
| 31 | ioctl(fd, TIOCMBIC); |
| 32 | |
| 33 | close(fd); |
| 34 | return 0; |
| 35 | } |