diff options
Diffstat (limited to 'apps/px4/tests/test_uart_loopback.c')
| -rw-r--r-- | apps/px4/tests/test_uart_loopback.c | 197 |
1 files changed, 197 insertions, 0 deletions
diff --git a/apps/px4/tests/test_uart_loopback.c b/apps/px4/tests/test_uart_loopback.c new file mode 100644 index 000000000..b2e07df1c --- /dev/null +++ b/apps/px4/tests/test_uart_loopback.c @@ -0,0 +1,197 @@ +/**************************************************************************** + * 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 <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_loopback(int argc, char *argv[]) +{ + + int uart5_nread = 0; + int uart2_nread = 0; + int uart5_nwrite = 0; + int uart2_nwrite = 0; + + int uart1 = open("/dev/ttyS0", O_RDWR | O_NOCTTY); // + + /* assuming NuttShell is on UART1 (/dev/ttyS0) */ + int uart2 = open("/dev/ttyS1", O_RDWR | O_NONBLOCK | O_NOCTTY); // + int uart5 = open("/dev/ttyS2", O_RDWR | O_NONBLOCK | O_NOCTTY); // + + if (uart2 < 0) { + printf("ERROR opening UART2, aborting..\n"); + return uart2; + } + + if (uart5 < 0) { + printf("ERROR opening UART5, aborting..\n"); + exit(uart5); + } + + uint8_t sample_uart1[] = {'C', 'O', 'U', 'N', 'T', ' ', '#', '\n'}; + uint8_t sample_uart2[] = {'C', 'O', 'U', 'N', 'T', ' ', '#', 0}; + uint8_t sample_uart5[] = {'C', 'O', 'U', 'N', 'T', ' ', '#', 0}; + + int i, r; + + for (i = 0; i < 1000; i++) { +// printf("TEST #%d\n",i); + write(uart1, sample_uart1, sizeof(sample_uart1)); + + /* uart2 -> uart5 */ + r = write(uart2, sample_uart2, sizeof(sample_uart2)); + + if (r > 0) + uart2_nwrite += r; + +// printf("TEST #%d\n",i); + write(uart1, sample_uart1, sizeof(sample_uart1)); + + /* uart2 -> uart5 */ + r = write(uart5, sample_uart5, sizeof(sample_uart5)); + + if (r > 0) + uart5_nwrite += r; + +// printf("TEST #%d\n",i); + write(uart1, sample_uart1, sizeof(sample_uart1)); + + /* try to read back values */ + do { + r = read(uart5, sample_uart2, sizeof(sample_uart2)); + + if (r > 0) + uart5_nread += r; + } while (r > 0); + +// printf("TEST #%d\n",i); + write(uart1, sample_uart1, sizeof(sample_uart1)); + + do { + r = read(uart2, sample_uart5, sizeof(sample_uart5)); + + if (r > 0) + uart2_nread += r; + } while (r > 0); + +// printf("TEST #%d\n",i); +// write(uart1, sample_uart1, sizeof(sample_uart5)); + } + + for (i = 0; i < 200000; i++) { + + /* try to read back values */ + r = read(uart5, sample_uart2, sizeof(sample_uart2)); + + if (r > 0) + uart5_nread += r; + + r = read(uart2, sample_uart5, sizeof(sample_uart5)); + + if (r > 0) + uart2_nread += r; + + if ((uart2_nread == uart2_nwrite) && (uart5_nread == uart5_nwrite)) + break; + } + + + close(uart1); + close(uart2); + close(uart5); + + printf("uart2_nwrite %d\n", uart2_nwrite); + printf("uart5_nwrite %d\n", uart5_nwrite); + printf("uart2_nread %d\n", uart2_nread); + printf("uart5_nread %d\n", uart5_nread); + + + return 0; +} |