px4-firmware/apps/px4/tests/test_uart_baudchange.c

161 lines
5.2 KiB
C

/****************************************************************************
* px4/sensors/test_gpio.c
*
* Copyright (C) 2012 PX4 Development Team. All rights reserved.
* Lorenz Meier <lm@inf.ethz.ch>
*
* 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 NuttX 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.
*
****************************************************************************/
/****************************************************************************
* Included Files
****************************************************************************/
#include <nuttx/config.h>
#include <sys/types.h>
#include <stdio.h>
#include <stdlib.h>
#include <unistd.h>
#include <fcntl.h>
#include <errno.h>
#include <debug.h>
#include <termios.h>
#include <string.h>
#include <arch/board/board.h>
#include <arch/board/drv_led.h>
#include "tests.h"
#include <math.h>
#include <float.h>
/****************************************************************************
* Pre-processor Definitions
****************************************************************************/
/****************************************************************************
* Private Types
****************************************************************************/
/****************************************************************************
* Private Function Prototypes
****************************************************************************/
/****************************************************************************
* Private Data
****************************************************************************/
/****************************************************************************
* Public Data
****************************************************************************/
/****************************************************************************
* Private Functions
****************************************************************************/
/****************************************************************************
* Public Functions
****************************************************************************/
/****************************************************************************
* Name: test_led
****************************************************************************/
int test_uart_baudchange(int argc, char *argv[])
{
int uart2_nwrite = 0;
/* assuming NuttShell is on UART1 (/dev/ttyS0) */
int uart2 = open("/dev/ttyS1", O_RDWR | O_NONBLOCK | O_NOCTTY); //
if (uart2 < 0) {
printf("ERROR opening UART2, aborting..\n");
return uart2;
}
struct termios uart2_config;
struct termios uart2_config_original;
int termios_state = 0;
#define UART_BAUDRATE_RUNTIME_CONF
#ifdef UART_BAUDRATE_RUNTIME_CONF
if ((termios_state = tcgetattr(uart2, &uart2_config)) < 0) {
printf("ERROR getting termios config for UART2: %d\n", termios_state);
exit(termios_state);
}
memcpy(&uart2_config_original, &uart2_config, sizeof(struct termios));
/* Set baud rate */
if (cfsetispeed(&uart2_config, B9600) < 0 || cfsetospeed(&uart2_config, B9600) < 0) {
printf("ERROR setting termios config for UART2: %d\n", termios_state);
exit(ERROR);
}
if ((termios_state = tcsetattr(uart2, TCSANOW, &uart2_config)) < 0) {
printf("ERROR setting termios config for UART2\n");
exit(termios_state);
}
/* Set back to original settings */
if ((termios_state = tcsetattr(uart2, TCSANOW, &uart2_config_original)) < 0) {
printf("ERROR setting termios config for UART2\n");
exit(termios_state);
}
#endif
uint8_t sample_uart2[] = {'U', 'A', 'R', 'T', '2', ' ', '#', 0, '\n'};
int i, r;
for (i = 0; i < 100; i++) {
/* uart2 -> */
r = write(uart2, sample_uart2, sizeof(sample_uart2));
if (r > 0)
uart2_nwrite += r;
}
close(uart2);
printf("uart2_nwrite %d\n", uart2_nwrite);
return OK;
}