diff options
Diffstat (limited to 'src/systemcmds/tests/test_ppm_loopback.c')
| -rw-r--r-- | src/systemcmds/tests/test_ppm_loopback.c | 178 |
1 files changed, 178 insertions, 0 deletions
diff --git a/src/systemcmds/tests/test_ppm_loopback.c b/src/systemcmds/tests/test_ppm_loopback.c new file mode 100644 index 000000000..b9041b013 --- /dev/null +++ b/src/systemcmds/tests/test_ppm_loopback.c @@ -0,0 +1,178 @@ +/**************************************************************************** + * + * Copyright (c) 2012, 2013 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_ppm_loopback.c + * Tests the PWM outputs and PPM input + * + */ + +#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 <drivers/drv_pwm_output.h> +#include <drivers/drv_rc_input.h> +#include <uORB/topics/rc_channels.h> +#include <systemlib/err.h> + +#include "tests.h" + +#include <math.h> +#include <float.h> + +int test_ppm_loopback(int argc, char *argv[]) +{ + + int _rc_sub = orb_subscribe(ORB_ID(input_rc)); + + int servo_fd, result; + servo_position_t data[PWM_OUTPUT_MAX_CHANNELS]; + servo_position_t pos; + + servo_fd = open(PWM_OUTPUT_DEVICE_PATH, O_RDWR); + + if (servo_fd < 0) { + printf("failed opening /dev/pwm_servo\n"); + } + + printf("Servo readback, pairs of values should match defaults\n"); + + unsigned servo_count; + result = ioctl(servo_fd, PWM_SERVO_GET_COUNT, (unsigned long)&servo_count); + if (result != OK) { + warnx("PWM_SERVO_GET_COUNT"); + return ERROR; + } + + for (unsigned i = 0; i < servo_count; i++) { + result = ioctl(servo_fd, PWM_SERVO_GET(i), (unsigned long)&pos); + + if (result < 0) { + printf("failed reading channel %u\n", i); + } + + //printf("%u: %u %u\n", i, pos, data[i]); + + } + + // /* tell safety that its ok to disable it with the switch */ + // result = ioctl(servo_fd, PWM_SERVO_SET_ARM_OK, 0); + // if (result != OK) + // warnx("FAIL: PWM_SERVO_SET_ARM_OK"); + // tell output device that the system is armed (it will output values if safety is off) + // result = ioctl(servo_fd, PWM_SERVO_ARM, 0); + // if (result != OK) + // warnx("FAIL: PWM_SERVO_ARM"); + + int pwm_values[] = {1200, 1300, 1900, 1700, 1500, 1250, 1800, 1400}; + + + // for (unsigned i = 0; (i < servo_count) && (i < sizeof(pwm_values) / sizeof(pwm_values[0])); i++) { + // result = ioctl(servo_fd, PWM_SERVO_SET(i), pwm_values[i]); + + // if (result) { + // (void)close(servo_fd); + // return ERROR; + // } else { + // warnx("channel %d set to %d", i, pwm_values[i]); + // } + // } + + warnx("servo count: %d", servo_count); + + struct pwm_output_values pwm_out = {.values = {0}, .channel_count = 0}; + + for (unsigned i = 0; (i < servo_count) && (i < sizeof(pwm_values) / sizeof(pwm_values[0])); i++) { + pwm_out.values[i] = pwm_values[i]; + //warnx("channel %d: disarmed PWM: %d", i+1, pwm_values[i]); + pwm_out.channel_count++; + } + + result = ioctl(servo_fd, PWM_SERVO_SET_DISARMED_PWM, (long unsigned int)&pwm_out); + + /* give driver 10 ms to propagate */ + + /* read low-level values from FMU or IO RC inputs (PPM, Spektrum, S.Bus) */ + struct rc_input_values rc_input; + orb_copy(ORB_ID(input_rc), _rc_sub, &rc_input); + usleep(100000); + + /* open PPM input and expect values close to the output values */ + + bool rc_updated; + orb_check(_rc_sub, &rc_updated); + + if (rc_updated) { + + orb_copy(ORB_ID(input_rc), _rc_sub, &rc_input); + + // int ppm_fd = open(RC_INPUT_DEVICE_PATH, O_RDONLY); + + + + // struct rc_input_values rc; + // result = read(ppm_fd, &rc, sizeof(rc)); + + // if (result != sizeof(rc)) { + // warnx("Error reading RC output"); + // (void)close(servo_fd); + // (void)close(ppm_fd); + // return ERROR; + // } + + /* go and check values */ + for (unsigned i = 0; (i < servo_count) && (i < sizeof(pwm_values) / sizeof(pwm_values[0])); i++) { + if (fabsf(rc_input.values[i] - pwm_values[i]) > 10) { + warnx("comparison fail: RC: %d, expected: %d", rc_input.values[i], pwm_values[i]); + (void)close(servo_fd); + return ERROR; + } + } + } else { + warnx("failed reading RC input data"); + return ERROR; + } + + warnx("PPM LOOPBACK TEST PASSED SUCCESSFULLY!"); + + return 0; +} |