C++ (Cpp) get_flow_control_enabled Exemples

Exemple #1

Fichier : mavlink_main.cpp Projet : hll4fork/Firmware-old

unsigned
Mavlink::get_free_tx_buf()
{
	/*
	 * Check if the OS buffer is full and disable HW
	 * flow control if it continues to be full
	 */
	int buf_free = 0;
	(void) ioctl(_uart_fd, FIONWRITE, (unsigned long)&buf_free);

	if (get_flow_control_enabled() && buf_free < FLOW_CONTROL_DISABLE_THRESHOLD) {
		/* Disable hardware flow control:
		 * if no successful write since a defined time
		 * and if the last try was not the last successful write
		 */
		if (_last_write_try_time != 0 &&
		    hrt_elapsed_time(&_last_write_success_time) > 500 * 1000UL &&
		    _last_write_success_time != _last_write_try_time) {
			warnx("Disabling hardware flow control");
			enable_flow_control(false);
		}
	}

	return buf_free;
}

Exemple #2

Fichier : mavlink_main.cpp Projet : akidhruv/Firmware

unsigned
Mavlink::get_free_tx_buf()
{
	/*
	 * Check if the OS buffer is full and disable HW
	 * flow control if it continues to be full
	 */
	int buf_free = 0;

#ifndef __PX4_POSIX

// No FIONWRITE on Linux
#if !defined(__PX4_LINUX)
	(void) ioctl(_uart_fd, FIONWRITE, (unsigned long)&buf_free);
#endif

	if (get_flow_control_enabled() && buf_free < FLOW_CONTROL_DISABLE_THRESHOLD) {
		/* Disable hardware flow control:
		 * if no successful write since a defined time
		 * and if the last try was not the last successful write
		 */
		if (_last_write_try_time != 0 &&
		    hrt_elapsed_time(&_last_write_success_time) > 500 * 1000UL &&
		    _last_write_success_time != _last_write_try_time) {
			warnx("Disabling hardware flow control");
			enable_flow_control(false);
		}
	}

#endif

	// if we are using network sockets, return max lenght of one packet
	if (get_protocol() == UDP || get_protocol() == TCP ) {
		return  1500;
	}

	return buf_free;
}