diff options
Diffstat (limited to 'src/modules/commander/airspeed_calibration.cpp')
| -rw-r--r-- | src/modules/commander/airspeed_calibration.cpp | 144 |
1 files changed, 127 insertions, 17 deletions
diff --git a/src/modules/commander/airspeed_calibration.cpp b/src/modules/commander/airspeed_calibration.cpp index 1809f9688..598cfe9e2 100644 --- a/src/modules/commander/airspeed_calibration.cpp +++ b/src/modules/commander/airspeed_calibration.cpp @@ -1,6 +1,6 @@ /**************************************************************************** * - * Copyright (C) 2013 PX4 Development Team. All rights reserved. + * Copyright (c) 2013, 2014 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 @@ -51,6 +51,7 @@ #include <mavlink/mavlink_log.h> #include <systemlib/param/param.h> #include <systemlib/err.h> +#include <systemlib/airspeed.h> /* oddly, ERROR is not defined for c++ */ #ifdef ERROR @@ -64,38 +65,58 @@ int do_airspeed_calibration(int mavlink_fd) { /* give directions */ mavlink_log_info(mavlink_fd, CAL_STARTED_MSG, sensor_name); - mavlink_log_info(mavlink_fd, "don't move system"); - const int calibration_count = 2500; + const unsigned calibration_count = 2000; int diff_pres_sub = orb_subscribe(ORB_ID(differential_pressure)); struct differential_pressure_s diff_pres; - int calibration_counter = 0; float diff_pres_offset = 0.0f; /* Reset sensor parameters */ struct airspeed_scale airscale = { - 0.0f, + diff_pres_offset, 1.0f, }; bool paramreset_successful = false; int fd = open(AIRSPEED_DEVICE_PATH, 0); + if (fd > 0) { if (OK == ioctl(fd, AIRSPEEDIOCSSCALE, (long unsigned int)&airscale)) { paramreset_successful = true; + + } else { + mavlink_log_critical(mavlink_fd, "airspeed offset zero failed"); } + close(fd); } if (!paramreset_successful) { - warn("WARNING: failed to set scale / offsets for airspeed sensor"); - mavlink_log_critical(mavlink_fd, "could not reset dpress sensor"); - mavlink_log_info(mavlink_fd, CAL_FAILED_MSG, sensor_name); - return ERROR; + + /* only warn if analog scaling is zero */ + float analog_scaling = 0.0f; + param_get(param_find("SENS_DPRES_ANSC"), &(analog_scaling)); + if (fabsf(analog_scaling) < 0.1f) { + mavlink_log_critical(mavlink_fd, "If analog sens, retry with [SENS_DPRES_ANSC=1000]"); + close(diff_pres_sub); + return ERROR; + } + + /* set scaling offset parameter */ + if (param_set(param_find("SENS_DPRES_OFF"), &(diff_pres_offset))) { + mavlink_log_critical(mavlink_fd, CAL_FAILED_SET_PARAMS_MSG); + close(diff_pres_sub); + return ERROR; + } } + unsigned calibration_counter = 0; + + mavlink_log_critical(mavlink_fd, "Ensure sensor is not measuring wind"); + usleep(500 * 1000); + while (calibration_counter < calibration_count) { /* wait blocking for new data */ @@ -107,11 +128,13 @@ int do_airspeed_calibration(int mavlink_fd) if (poll_ret) { orb_copy(ORB_ID(differential_pressure), diff_pres_sub, &diff_pres); - diff_pres_offset += diff_pres.differential_pressure_pa; + + diff_pres_offset += diff_pres.differential_pressure_raw_pa; calibration_counter++; - if (calibration_counter % (calibration_count / 20) == 0) - mavlink_log_info(mavlink_fd, CAL_PROGRESS_MSG, sensor_name, (calibration_counter * 100) / calibration_count); + if (calibration_counter % (calibration_count / 20) == 0) { + mavlink_log_info(mavlink_fd, CAL_PROGRESS_MSG, sensor_name, (calibration_counter * 80) / calibration_count); + } } else if (poll_ret == 0) { /* any poll failure for 1s is a reason to abort */ @@ -125,6 +148,16 @@ int do_airspeed_calibration(int mavlink_fd) if (isfinite(diff_pres_offset)) { + int fd_scale = open(AIRSPEED_DEVICE_PATH, 0); + airscale.offset_pa = diff_pres_offset; + if (fd_scale > 0) { + if (OK != ioctl(fd_scale, AIRSPEEDIOCSSCALE, (long unsigned int)&airscale)) { + mavlink_log_critical(mavlink_fd, "airspeed offset update failed"); + } + + close(fd_scale); + } + if (param_set(param_find("SENS_DPRES_OFF"), &(diff_pres_offset))) { mavlink_log_critical(mavlink_fd, CAL_FAILED_SET_PARAMS_MSG); close(diff_pres_sub); @@ -141,14 +174,91 @@ int do_airspeed_calibration(int mavlink_fd) return ERROR; } - mavlink_log_info(mavlink_fd, CAL_DONE_MSG, sensor_name); - tune_neutral(); - close(diff_pres_sub); - return OK; - } else { mavlink_log_info(mavlink_fd, CAL_FAILED_MSG, sensor_name); close(diff_pres_sub); return ERROR; } + + mavlink_log_critical(mavlink_fd, "Offset of %d Pa, create airflow now!", (int)diff_pres_offset); + + /* wait 500 ms to ensure parameter propagated through the system */ + usleep(500 * 1000); + + calibration_counter = 0; + const int maxcount = 3000; + + /* just take a few samples and make sure pitot tubes are not reversed, timeout after ~30 seconds */ + while (calibration_counter < maxcount) { + + /* wait blocking for new data */ + struct pollfd fds[1]; + fds[0].fd = diff_pres_sub; + fds[0].events = POLLIN; + + int poll_ret = poll(fds, 1, 1000); + + if (poll_ret) { + orb_copy(ORB_ID(differential_pressure), diff_pres_sub, &diff_pres); + + calibration_counter++; + + if (fabsf(diff_pres.differential_pressure_raw_pa) < 50.0f) { + if (calibration_counter % 100 == 0) { + mavlink_log_critical(mavlink_fd, "Missing airflow! (%d, wanted: 50 Pa, #h101)", + (int)diff_pres.differential_pressure_raw_pa); + } + continue; + } + + /* do not allow negative values */ + if (diff_pres.differential_pressure_raw_pa < 0.0f) { + mavlink_log_info(mavlink_fd, "negative pressure: ERROR (%d Pa)", + (int)diff_pres.differential_pressure_raw_pa); + mavlink_log_critical(mavlink_fd, "%d Pa: swap static and dynamic ports!", (int)diff_pres.differential_pressure_raw_pa); + close(diff_pres_sub); + + /* the user setup is wrong, wipe the calibration to force a proper re-calibration */ + + diff_pres_offset = 0.0f; + if (param_set(param_find("SENS_DPRES_OFF"), &(diff_pres_offset))) { + mavlink_log_critical(mavlink_fd, CAL_FAILED_SET_PARAMS_MSG); + close(diff_pres_sub); + return ERROR; + } + + /* save */ + mavlink_log_info(mavlink_fd, CAL_PROGRESS_MSG, sensor_name, 0); + (void)param_save_default(); + + close(diff_pres_sub); + + mavlink_log_info(mavlink_fd, CAL_FAILED_MSG, sensor_name); + return ERROR; + } else { + mavlink_log_info(mavlink_fd, "positive pressure: OK (%d Pa)", + (int)diff_pres.differential_pressure_raw_pa); + break; + } + + } else if (poll_ret == 0) { + /* any poll failure for 1s is a reason to abort */ + mavlink_log_critical(mavlink_fd, CAL_FAILED_MSG, sensor_name); + close(diff_pres_sub); + return ERROR; + } + } + + if (calibration_counter == maxcount) { + mavlink_log_critical(mavlink_fd, CAL_FAILED_MSG, sensor_name); + close(diff_pres_sub); + return ERROR; + } + + mavlink_log_info(mavlink_fd, CAL_PROGRESS_MSG, sensor_name, 100); + + mavlink_log_info(mavlink_fd, CAL_DONE_MSG, sensor_name); + tune_neutral(true); + close(diff_pres_sub); + return OK; } |