test_uart_send.c
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/****************************************************************************
*
* Copyright (C) 2012-2019 PX4 Development Team. All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
*
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in
* the documentation and/or other materials provided with the
* distribution.
* 3. Neither the name PX4 nor the names of its contributors may be
* used to endorse or promote products derived from this software
* without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
* FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
* COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
* BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS
* OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED
* AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN
* ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
* POSSIBILITY OF SUCH DAMAGE.
*
****************************************************************************/
/**
* @file test_uart_send.c
* Tests the uart send functionality.
*
* @author Lorenz Meier <lorenz@px4.io>
*/
#include <px4_platform_common/px4_config.h>
#include <sys/types.h>
#include <stdio.h>
#include <stdlib.h>
#include <unistd.h>
#include <fcntl.h>
#include <errno.h>
#include "tests_main.h"
#include <math.h>
#include <float.h>
#include <drivers/drv_hrt.h>
int test_uart_send(int argc, char *argv[])
{
/* input handling */
char *uart_name = "/dev/ttyS3";
if (argc > 1) { uart_name = argv[1]; }
/* assuming NuttShell is on UART1 (/dev/ttyS0) */
int test_uart = open(uart_name, O_RDWR | O_NONBLOCK | O_NOCTTY); //
if (test_uart < 0) {
printf("ERROR opening UART %s, aborting..\n", uart_name);
return test_uart;
} else {
printf("Writing to UART %s\n", uart_name);
}
char sample_test_uart[25];// = {'S', 'A', 'M', 'P', 'L', 'E', ' ', '\n'};
int i, n;
uint64_t start_time = hrt_absolute_time();
for (i = 0; i < 30000; i++) {
n = sprintf(sample_test_uart, "SAMPLE #%d\n", i);
write(test_uart, sample_test_uart, n);
}
int interval = hrt_absolute_time() - start_time;
int bytes = i * sizeof(sample_test_uart);
printf("Wrote %d bytes in %d ms on UART %s\n", bytes, interval / 1000, uart_name);
close(test_uart);
return 0;
}