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Program to set arbitrary speed
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| /* | |
| * Allows to set arbitrary speed for the serial device on Linux. | |
| * stty allows to set only predefined values: 9600, 19200, 38400, 57600, 115200, 230400, 460800. | |
| */ | |
| #include <stdio.h> | |
| #include <fcntl.h> | |
| #include <errno.h> | |
| #include <asm/termios.h> | |
| int main(int argc, char* argv[]) { | |
| if (argc != 3) { | |
| printf("%s device speed\n\nSet speed for a serial device.\nFor instance:\n %s /dev/ttyUSB0 75000\n", argv[0], argv[0]); | |
| return -1; | |
| } | |
| int fd = open(argv[1], O_RDONLY); | |
| int speed = atoi(argv[2]); | |
| struct termios2 tio; | |
| ioctl(fd, TCGETS2, &tio); | |
| tio.c_cflag &= ~CBAUD; | |
| tio.c_cflag |= BOTHER; | |
| tio.c_ispeed = speed; | |
| tio.c_ospeed = speed; | |
| int r = ioctl(fd, TCSETS2, &tio); | |
| close(fd); | |
| if (r == 0) { | |
| printf("Changed successfully.\n"); | |
| } else { | |
| perror("ioctl"); | |
| } | |
| } |
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