view miscutil/fc-pulse-rts.c @ 1012:11391cb6bdc0

patch from fixeria: doc change from SE K2x0 to K2xx Since their discovery in late 2022, Sony Ericsson K200 and K220 phones were collectively referred to as SE K2x0 in FreeCalypso documentation. However, now that SE K205 has been discovered as yet another member of the same family (same PCBA in different case), it makes more sense to refer to the whole family as SE K2xx.
author Mychaela Falconia <falcon@freecalypso.org>
date Mon, 23 Sep 2024 12:23:20 +0000
parents 5b8287c655cf
children
line wrap: on
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/*
 * This utility opens a serial port, asserts RTS for 50 ms, then negates it
 * and exits.  It is intended for use with FreeCalypso DUART28C adapters.
 */

#include <sys/types.h>
#include <sys/file.h>
#include <sys/ioctl.h>
#include <stdio.h>
#include <stdlib.h>
#include <unistd.h>

main(argc, argv)
	char **argv;
{
	int target_fd;
	int mctl_arg = TIOCM_RTS;

	if (argc != 2) {
		fprintf(stderr, "usage: %s ttyname\n", argv[0]);
		exit(1);
	}
	target_fd = open(argv[1], O_RDWR|O_NONBLOCK);
	if (target_fd < 0) {
		perror(argv[1]);
		exit(1);
	}
	ioctl(target_fd, TIOCMBIS, &mctl_arg);
	usleep(50000);
	ioctl(target_fd, TIOCMBIC, &mctl_arg);
	exit(0);
}