From 6a624ff753ad9ba6e7fb74783b6b8294a1c17957 Mon Sep 17 00:00:00 2001 From: Stefan Rado Date: Sat, 19 Oct 2013 23:04:36 +0200 Subject: Fix gyro calibration for rotated sensors. The calibration routine now uses the raw sensor values instead of the already rotated values. --- src/modules/commander/gyro_calibration.cpp | 178 +++++++++++++---------------- 1 file changed, 78 insertions(+), 100 deletions(-) (limited to 'src') diff --git a/src/modules/commander/gyro_calibration.cpp b/src/modules/commander/gyro_calibration.cpp index 369e6da62..b6de5141f 100644 --- a/src/modules/commander/gyro_calibration.cpp +++ b/src/modules/commander/gyro_calibration.cpp @@ -60,17 +60,7 @@ int do_gyro_calibration(int mavlink_fd) { mavlink_log_info(mavlink_fd, "Gyro calibration starting, do not move unit."); - const unsigned calibration_count = 5000; - - int sub_sensor_combined = orb_subscribe(ORB_ID(sensor_combined)); - struct sensor_combined_s raw; - - unsigned calibration_counter = 0; - float gyro_offset[3] = {0.0f, 0.0f, 0.0f}; - - /* set offsets to zero */ - int fd = open(GYRO_DEVICE_PATH, 0); - struct gyro_scale gscale_null = { + struct gyro_scale gyro_scale = { 0.0f, 1.0f, 0.0f, @@ -79,27 +69,40 @@ int do_gyro_calibration(int mavlink_fd) 1.0f, }; - if (OK != ioctl(fd, GYROIOCSSCALE, (long unsigned int)&gscale_null)) - warn("WARNING: failed to set scale / offsets for gyro"); + /* subscribe to gyro sensor topic */ + int sub_sensor_gyro = orb_subscribe(ORB_ID(sensor_gyro)); + struct gyro_report gyro_report; + + /* reset all offsets to zero and all scales to one */ + int fd = open(GYRO_DEVICE_PATH, 0); + + if (OK != ioctl(fd, GYROIOCSSCALE, (long unsigned int)&gyro_scale)) + warn("WARNING: failed to reset scale / offsets for gyro"); close(fd); + + /*** --- OFFSETS --- ***/ + + /* determine gyro mean values */ + const unsigned calibration_count = 5000; + unsigned calibration_counter = 0; unsigned poll_errcount = 0; while (calibration_counter < calibration_count) { /* wait blocking for new data */ struct pollfd fds[1]; - fds[0].fd = sub_sensor_combined; + fds[0].fd = sub_sensor_gyro; fds[0].events = POLLIN; int poll_ret = poll(fds, 1, 1000); if (poll_ret > 0) { - orb_copy(ORB_ID(sensor_combined), sub_sensor_combined, &raw); - gyro_offset[0] += raw.gyro_rad_s[0]; - gyro_offset[1] += raw.gyro_rad_s[1]; - gyro_offset[2] += raw.gyro_rad_s[2]; + orb_copy(ORB_ID(sensor_gyro), sub_sensor_gyro, &gyro_report); + gyro_scale.x_offset += gyro_report.x; + gyro_scale.y_offset += gyro_report.y; + gyro_scale.z_offset += gyro_report.z; calibration_counter++; if (calibration_counter % (calibration_count / 20) == 0) mavlink_log_info(mavlink_fd, "gyro cal progress <%u> percent", (calibration_counter * 100) / calibration_count); @@ -110,67 +113,49 @@ int do_gyro_calibration(int mavlink_fd) if (poll_errcount > 1000) { mavlink_log_info(mavlink_fd, "ERROR: Failed reading gyro sensor"); - close(sub_sensor_combined); + close(sub_sensor_gyro); return ERROR; } } - gyro_offset[0] = gyro_offset[0] / calibration_count; - gyro_offset[1] = gyro_offset[1] / calibration_count; - gyro_offset[2] = gyro_offset[2] / calibration_count; - - - if (isfinite(gyro_offset[0]) && isfinite(gyro_offset[1]) && isfinite(gyro_offset[2])) { - - if (param_set(param_find("SENS_GYRO_XOFF"), &(gyro_offset[0])) - || param_set(param_find("SENS_GYRO_YOFF"), &(gyro_offset[1])) - || param_set(param_find("SENS_GYRO_ZOFF"), &(gyro_offset[2]))) { - mavlink_log_critical(mavlink_fd, "Setting gyro offsets failed!"); - } - - /* set offsets to actual value */ - fd = open(GYRO_DEVICE_PATH, 0); - struct gyro_scale gscale = { - gyro_offset[0], - 1.0f, - gyro_offset[1], - 1.0f, - gyro_offset[2], - 1.0f, - }; - - if (OK != ioctl(fd, GYROIOCSSCALE, (long unsigned int)&gscale)) - warn("WARNING: failed to set scale / offsets for gyro"); - - close(fd); - - /* auto-save to EEPROM */ - int save_ret = param_save_default(); - - if (save_ret != 0) { - warnx("WARNING: auto-save of params to storage failed"); - mavlink_log_critical(mavlink_fd, "gyro store failed"); - close(sub_sensor_combined); - return ERROR; - } - - tune_neutral(); - /* third beep by cal end routine */ + gyro_scale.x_offset /= calibration_count; + gyro_scale.y_offset /= calibration_count; + gyro_scale.z_offset /= calibration_count; - } else { - mavlink_log_info(mavlink_fd, "offset cal FAILED (NaN)"); - close(sub_sensor_combined); + if (!isfinite(gyro_scale.x_offset) || !isfinite(gyro_scale.y_offset) || !isfinite(gyro_scale.z_offset)) { + mavlink_log_info(mavlink_fd, "gyro offset calibration FAILED (NaN)"); + close(sub_sensor_gyro); return ERROR; } + /* beep on calibration end */ mavlink_log_info(mavlink_fd, "offset calibration done."); + tune_neutral(); + + /* set offset parameters to new values */ + if (param_set(param_find("SENS_GYRO_XOFF"), &(gyro_scale.x_offset)) + || param_set(param_find("SENS_GYRO_YOFF"), &(gyro_scale.y_offset)) + || param_set(param_find("SENS_GYRO_ZOFF"), &(gyro_scale.z_offset))) { + mavlink_log_critical(mavlink_fd, "Setting gyro offset parameters failed!"); + } + -#if 0 /*** --- SCALING --- ***/ +#if 0 + /* this was only a proof of concept and is currently not working. scaling will be set to 1.0 for now. */ mavlink_log_info(mavlink_fd, "offset done. Rotate for scale 30x or wait 5s to skip."); warnx("offset calibration finished. Rotate for scale 30x, or do not rotate and wait for 5 seconds to skip."); + /* apply new offsets */ + fd = open(GYRO_DEVICE_PATH, 0); + + if (OK != ioctl(fd, GYROIOCSSCALE, (long unsigned int)&gyro_scale)) + warn("WARNING: failed to apply new offsets for gyro"); + + close(fd); + + unsigned rotations_count = 30; float gyro_integral = 0.0f; float baseline_integral = 0.0f; @@ -246,52 +231,45 @@ int do_gyro_calibration(int mavlink_fd) warnx("gyro scale: yaw (z): %6.4f", (double)gyro_scale); mavlink_log_info(mavlink_fd, "gyro scale: yaw (z): %6.4f", (double)gyro_scale); -#else - float gyro_scales[] = { 1.0f, 1.0f, 1.0f }; -#endif - - - if (isfinite(gyro_scales[0]) && isfinite(gyro_scales[1]) && isfinite(gyro_scales[2])) { + if (!isfinite(gyro_scale.x_scale) || !isfinite(gyro_scale.y_scale) || !isfinite(gyro_scale.z_scale)) { + mavlink_log_info(mavlink_fd, "gyro scale calibration FAILED (NaN)"); + close(sub_sensor_gyro); + return ERROR; + } - if (param_set(param_find("SENS_GYRO_XSCALE"), &(gyro_scales[0])) - || param_set(param_find("SENS_GYRO_YSCALE"), &(gyro_scales[1])) - || param_set(param_find("SENS_GYRO_ZSCALE"), &(gyro_scales[2]))) { - mavlink_log_critical(mavlink_fd, "Setting gyro scale failed!"); - } + /* beep on calibration end */ + mavlink_log_info(mavlink_fd, "scale calibration done."); + tune_neutral(); - /* set offsets to actual value */ - fd = open(GYRO_DEVICE_PATH, 0); - struct gyro_scale gscale = { - gyro_offset[0], - gyro_scales[0], - gyro_offset[1], - gyro_scales[1], - gyro_offset[2], - gyro_scales[2], - }; +#endif - if (OK != ioctl(fd, GYROIOCSSCALE, (long unsigned int)&gscale)) - warn("WARNING: failed to set scale / offsets for gyro"); + /* set scale parameters to new values */ + if (param_set(param_find("SENS_GYRO_XSCALE"), &(gyro_scale.x_scale)) + || param_set(param_find("SENS_GYRO_YSCALE"), &(gyro_scale.y_scale)) + || param_set(param_find("SENS_GYRO_ZSCALE"), &(gyro_scale.z_scale))) { + mavlink_log_critical(mavlink_fd, "Setting gyro scale parameters failed!"); + } - close(fd); + /* apply new scaling and offsets */ + fd = open(GYRO_DEVICE_PATH, 0); - /* auto-save to EEPROM */ - int save_ret = param_save_default(); + if (OK != ioctl(fd, GYROIOCSSCALE, (long unsigned int)&gyro_scale)) + warn("WARNING: failed to apply new scale for gyro"); - if (save_ret != 0) { - warn("WARNING: auto-save of params to storage failed"); - } + close(fd); - mavlink_log_info(mavlink_fd, "gyro calibration done"); + /* auto-save to EEPROM */ + int save_ret = param_save_default(); - /* third beep by cal end routine */ - close(sub_sensor_combined); - return OK; - } else { - mavlink_log_info(mavlink_fd, "gyro calibration FAILED (NaN)"); - close(sub_sensor_combined); + if (save_ret != 0) { + warnx("WARNING: auto-save of params to storage failed"); + mavlink_log_critical(mavlink_fd, "gyro store failed"); + close(sub_sensor_gyro); return ERROR; } + + close(sub_sensor_gyro); + return OK; } -- cgit v1.2.3