diff options
Diffstat (limited to 'src/modules/mavlink/mavlink_receiver.c')
-rw-r--r-- | src/modules/mavlink/mavlink_receiver.c | 600 |
1 files changed, 600 insertions, 0 deletions
diff --git a/src/modules/mavlink/mavlink_receiver.c b/src/modules/mavlink/mavlink_receiver.c new file mode 100644 index 000000000..a42612f9e --- /dev/null +++ b/src/modules/mavlink/mavlink_receiver.c @@ -0,0 +1,600 @@ +/**************************************************************************** + * + * Copyright (C) 2012 PX4 Development Team. All rights reserved. + * Author: 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 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 mavlink_receiver.c + * MAVLink protocol message receive and dispatch + * + * @author Lorenz Meier <lm@inf.ethz.ch> + */ + +/* XXX trim includes */ +#include <nuttx/config.h> +#include <unistd.h> +#include <pthread.h> +#include <stdio.h> +#include <math.h> +#include <stdbool.h> +#include <fcntl.h> +#include <mqueue.h> +#include <string.h> +#include "mavlink_bridge_header.h" +#include <v1.0/common/mavlink.h> +#include <drivers/drv_hrt.h> +#include <time.h> +#include <float.h> +#include <unistd.h> +#include <nuttx/sched.h> +#include <sys/prctl.h> +#include <termios.h> +#include <errno.h> +#include <stdlib.h> +#include <poll.h> + +#include <systemlib/param/param.h> +#include <systemlib/systemlib.h> +#include <mavlink/mavlink_log.h> + +#include "waypoints.h" +#include "orb_topics.h" +#include "missionlib.h" +#include "mavlink_hil.h" +#include "mavlink_parameters.h" +#include "util.h" + +/* XXX should be in a header somewhere */ +pthread_t receive_start(int uart); + +static void handle_message(mavlink_message_t *msg); +static void *receive_thread(void *arg); + +static mavlink_status_t status; +static struct vehicle_vicon_position_s vicon_position; +static struct vehicle_command_s vcmd; +static struct offboard_control_setpoint_s offboard_control_sp; + +struct vehicle_global_position_s hil_global_pos; +struct vehicle_attitude_s hil_attitude; +struct vehicle_gps_position_s hil_gps; +struct sensor_combined_s hil_sensors; +orb_advert_t pub_hil_global_pos = -1; +orb_advert_t pub_hil_attitude = -1; +orb_advert_t pub_hil_gps = -1; +orb_advert_t pub_hil_sensors = -1; + +static orb_advert_t cmd_pub = -1; +static orb_advert_t flow_pub = -1; + +static orb_advert_t offboard_control_sp_pub = -1; +static orb_advert_t vicon_position_pub = -1; + +extern bool gcs_link; + +static void +handle_message(mavlink_message_t *msg) +{ + if (msg->msgid == MAVLINK_MSG_ID_COMMAND_LONG) { + + mavlink_command_long_t cmd_mavlink; + mavlink_msg_command_long_decode(msg, &cmd_mavlink); + + if (cmd_mavlink.target_system == mavlink_system.sysid && ((cmd_mavlink.target_component == mavlink_system.compid) + || (cmd_mavlink.target_component == MAV_COMP_ID_ALL))) { + //check for MAVLINK terminate command + if (cmd_mavlink.command == MAV_CMD_PREFLIGHT_REBOOT_SHUTDOWN && ((int)cmd_mavlink.param1) == 3) { + /* This is the link shutdown command, terminate mavlink */ + printf("[mavlink] Terminating .. \n"); + fflush(stdout); + usleep(50000); + + /* terminate other threads and this thread */ + thread_should_exit = true; + + } else { + + /* Copy the content of mavlink_command_long_t cmd_mavlink into command_t cmd */ + vcmd.param1 = cmd_mavlink.param1; + vcmd.param2 = cmd_mavlink.param2; + vcmd.param3 = cmd_mavlink.param3; + vcmd.param4 = cmd_mavlink.param4; + vcmd.param5 = cmd_mavlink.param5; + vcmd.param6 = cmd_mavlink.param6; + vcmd.param7 = cmd_mavlink.param7; + vcmd.command = cmd_mavlink.command; + vcmd.target_system = cmd_mavlink.target_system; + vcmd.target_component = cmd_mavlink.target_component; + vcmd.source_system = msg->sysid; + vcmd.source_component = msg->compid; + vcmd.confirmation = cmd_mavlink.confirmation; + + /* check if topic is advertised */ + if (cmd_pub <= 0) { + cmd_pub = orb_advertise(ORB_ID(vehicle_command), &vcmd); + } + + /* publish */ + orb_publish(ORB_ID(vehicle_command), cmd_pub, &vcmd); + } + } + } + + if (msg->msgid == MAVLINK_MSG_ID_OPTICAL_FLOW) { + mavlink_optical_flow_t flow; + mavlink_msg_optical_flow_decode(msg, &flow); + + struct optical_flow_s f; + + f.timestamp = flow.time_usec; + f.flow_raw_x = flow.flow_x; + f.flow_raw_y = flow.flow_y; + f.flow_comp_x_m = flow.flow_comp_m_x; + f.flow_comp_y_m = flow.flow_comp_m_y; + f.ground_distance_m = flow.ground_distance; + f.quality = flow.quality; + f.sensor_id = flow.sensor_id; + + /* check if topic is advertised */ + if (flow_pub <= 0) { + flow_pub = orb_advertise(ORB_ID(optical_flow), &f); + + } else { + /* publish */ + orb_publish(ORB_ID(optical_flow), flow_pub, &f); + } + } + + if (msg->msgid == MAVLINK_MSG_ID_SET_MODE) { + /* Set mode on request */ + mavlink_set_mode_t new_mode; + mavlink_msg_set_mode_decode(msg, &new_mode); + + /* Copy the content of mavlink_command_long_t cmd_mavlink into command_t cmd */ + vcmd.param1 = new_mode.base_mode; + vcmd.param2 = new_mode.custom_mode; + vcmd.param3 = 0; + vcmd.param4 = 0; + vcmd.param5 = 0; + vcmd.param6 = 0; + vcmd.param7 = 0; + vcmd.command = MAV_CMD_DO_SET_MODE; + vcmd.target_system = new_mode.target_system; + vcmd.target_component = MAV_COMP_ID_ALL; + vcmd.source_system = msg->sysid; + vcmd.source_component = msg->compid; + vcmd.confirmation = 1; + + /* check if topic is advertised */ + if (cmd_pub <= 0) { + cmd_pub = orb_advertise(ORB_ID(vehicle_command), &vcmd); + + } else { + /* create command */ + orb_publish(ORB_ID(vehicle_command), cmd_pub, &vcmd); + } + } + + /* Handle Vicon position estimates */ + if (msg->msgid == MAVLINK_MSG_ID_VICON_POSITION_ESTIMATE) { + mavlink_vicon_position_estimate_t pos; + mavlink_msg_vicon_position_estimate_decode(msg, &pos); + + vicon_position.timestamp = hrt_absolute_time(); + + vicon_position.x = pos.x; + vicon_position.y = pos.y; + vicon_position.z = pos.z; + + vicon_position.roll = pos.roll; + vicon_position.pitch = pos.pitch; + vicon_position.yaw = pos.yaw; + + if (vicon_position_pub <= 0) { + vicon_position_pub = orb_advertise(ORB_ID(vehicle_vicon_position), &vicon_position); + + } else { + orb_publish(ORB_ID(vehicle_vicon_position), vicon_position_pub, &vicon_position); + } + } + + /* Handle quadrotor motor setpoints */ + + if (msg->msgid == MAVLINK_MSG_ID_SET_QUAD_SWARM_ROLL_PITCH_YAW_THRUST) { + mavlink_set_quad_swarm_roll_pitch_yaw_thrust_t quad_motors_setpoint; + mavlink_msg_set_quad_swarm_roll_pitch_yaw_thrust_decode(msg, &quad_motors_setpoint); + + if (mavlink_system.sysid < 4) { + + /* switch to a receiving link mode */ + gcs_link = false; + + /* + * rate control mode - defined by MAVLink + */ + + uint8_t ml_mode = 0; + bool ml_armed = false; + + switch (quad_motors_setpoint.mode) { + case 0: + ml_armed = false; + break; + + case 1: + ml_mode = OFFBOARD_CONTROL_MODE_DIRECT_RATES; + ml_armed = true; + + break; + + case 2: + ml_mode = OFFBOARD_CONTROL_MODE_DIRECT_ATTITUDE; + ml_armed = true; + + break; + + case 3: + ml_mode = OFFBOARD_CONTROL_MODE_DIRECT_VELOCITY; + break; + + case 4: + ml_mode = OFFBOARD_CONTROL_MODE_DIRECT_POSITION; + break; + } + + offboard_control_sp.p1 = (float)quad_motors_setpoint.roll[mavlink_system.sysid - 1] / (float)INT16_MAX; + offboard_control_sp.p2 = (float)quad_motors_setpoint.pitch[mavlink_system.sysid - 1] / (float)INT16_MAX; + offboard_control_sp.p3 = (float)quad_motors_setpoint.yaw[mavlink_system.sysid - 1] / (float)INT16_MAX; + offboard_control_sp.p4 = (float)quad_motors_setpoint.thrust[mavlink_system.sysid - 1] / (float)UINT16_MAX; + + if (quad_motors_setpoint.thrust[mavlink_system.sysid - 1] == 0) { + ml_armed = false; + } + + offboard_control_sp.armed = ml_armed; + offboard_control_sp.mode = ml_mode; + + offboard_control_sp.timestamp = hrt_absolute_time(); + + /* check if topic has to be advertised */ + if (offboard_control_sp_pub <= 0) { + offboard_control_sp_pub = orb_advertise(ORB_ID(offboard_control_setpoint), &offboard_control_sp); + + } else { + /* Publish */ + orb_publish(ORB_ID(offboard_control_setpoint), offboard_control_sp_pub, &offboard_control_sp); + } + } + } + + /* + * Only decode hil messages in HIL mode. + * + * The HIL mode is enabled by the HIL bit flag + * in the system mode. Either send a set mode + * COMMAND_LONG message or a SET_MODE message + */ + + if (mavlink_hil_enabled) { + + uint64_t timestamp = hrt_absolute_time(); + + if (msg->msgid == MAVLINK_MSG_ID_HIGHRES_IMU) { + + mavlink_highres_imu_t imu; + mavlink_msg_highres_imu_decode(msg, &imu); + + /* packet counter */ + static uint16_t hil_counter = 0; + static uint16_t hil_frames = 0; + static uint64_t old_timestamp = 0; + + /* sensors general */ + hil_sensors.timestamp = hrt_absolute_time(); + + /* hil gyro */ + static const float mrad2rad = 1.0e-3f; + hil_sensors.gyro_counter = hil_counter; + hil_sensors.gyro_raw[0] = imu.xgyro / mrad2rad; + hil_sensors.gyro_raw[1] = imu.ygyro / mrad2rad; + hil_sensors.gyro_raw[2] = imu.zgyro / mrad2rad; + hil_sensors.gyro_rad_s[0] = imu.xgyro; + hil_sensors.gyro_rad_s[1] = imu.ygyro; + hil_sensors.gyro_rad_s[2] = imu.zgyro; + + /* accelerometer */ + hil_sensors.accelerometer_counter = hil_counter; + static const float mg2ms2 = 9.8f / 1000.0f; + hil_sensors.accelerometer_raw[0] = imu.xacc / mg2ms2; + hil_sensors.accelerometer_raw[1] = imu.yacc / mg2ms2; + hil_sensors.accelerometer_raw[2] = imu.zacc / mg2ms2; + hil_sensors.accelerometer_m_s2[0] = imu.xacc; + hil_sensors.accelerometer_m_s2[1] = imu.yacc; + hil_sensors.accelerometer_m_s2[2] = imu.zacc; + hil_sensors.accelerometer_mode = 0; // TODO what is this? + hil_sensors.accelerometer_range_m_s2 = 32.7f; // int16 + + /* adc */ + hil_sensors.adc_voltage_v[0] = 0; + hil_sensors.adc_voltage_v[1] = 0; + hil_sensors.adc_voltage_v[2] = 0; + + /* magnetometer */ + float mga2ga = 1.0e-3f; + hil_sensors.magnetometer_counter = hil_counter; + hil_sensors.magnetometer_raw[0] = imu.xmag / mga2ga; + hil_sensors.magnetometer_raw[1] = imu.ymag / mga2ga; + hil_sensors.magnetometer_raw[2] = imu.zmag / mga2ga; + hil_sensors.magnetometer_ga[0] = imu.xmag; + hil_sensors.magnetometer_ga[1] = imu.ymag; + hil_sensors.magnetometer_ga[2] = imu.zmag; + hil_sensors.magnetometer_range_ga = 32.7f; // int16 + hil_sensors.magnetometer_mode = 0; // TODO what is this + hil_sensors.magnetometer_cuttoff_freq_hz = 50.0f; + + /* baro */ + hil_sensors.baro_pres_mbar = imu.abs_pressure; + hil_sensors.baro_alt_meter = imu.pressure_alt; + hil_sensors.baro_temp_celcius = imu.temperature; + + hil_sensors.gyro_counter = hil_counter; + hil_sensors.magnetometer_counter = hil_counter; + hil_sensors.accelerometer_counter = hil_counter; + + /* publish */ + orb_publish(ORB_ID(sensor_combined), pub_hil_sensors, &hil_sensors); + + // increment counters + hil_counter++; + hil_frames++; + + // output + if ((timestamp - old_timestamp) > 10000000) { + printf("receiving hil imu at %d hz\n", hil_frames/10); + old_timestamp = timestamp; + hil_frames = 0; + } + } + + if (msg->msgid == MAVLINK_MSG_ID_GPS_RAW_INT) { + + mavlink_gps_raw_int_t gps; + mavlink_msg_gps_raw_int_decode(msg, &gps); + + /* packet counter */ + static uint16_t hil_counter = 0; + static uint16_t hil_frames = 0; + static uint64_t old_timestamp = 0; + + /* gps */ + hil_gps.timestamp_position = gps.time_usec; + hil_gps.time_gps_usec = gps.time_usec; + hil_gps.lat = gps.lat; + hil_gps.lon = gps.lon; + hil_gps.alt = gps.alt; + hil_gps.eph_m = (float)gps.eph * 1e-2f; // from cm to m + hil_gps.epv_m = (float)gps.epv * 1e-2f; // from cm to m + hil_gps.s_variance_m_s = 5.0f; + hil_gps.p_variance_m = hil_gps.eph_m * hil_gps.eph_m; + hil_gps.vel_m_s = (float)gps.vel * 1e-2f; // from cm/s to m/s + + /* gps.cog is in degrees 0..360 * 100, heading is -PI..+PI */ + float heading_rad = gps.cog * M_DEG_TO_RAD_F * 1e-2f; + /* go back to -PI..PI */ + if (heading_rad > M_PI_F) + heading_rad -= 2.0f * M_PI_F; + hil_gps.vel_n_m_s = (float)gps.vel * 1e-2f * cosf(heading_rad); + hil_gps.vel_e_m_s = (float)gps.vel * 1e-2f * sinf(heading_rad); + hil_gps.vel_d_m_s = 0.0f; + hil_gps.vel_ned_valid = true; + /* COG (course over ground) is speced as -PI..+PI */ + hil_gps.cog_rad = heading_rad; + hil_gps.fix_type = gps.fix_type; + hil_gps.satellites_visible = gps.satellites_visible; + + /* publish */ + orb_publish(ORB_ID(vehicle_gps_position), pub_hil_gps, &hil_gps); + + // increment counters + hil_counter += 1 ; + hil_frames += 1 ; + + // output + if ((timestamp - old_timestamp) > 10000000) { + printf("receiving hil gps at %d hz\n", hil_frames/10); + old_timestamp = timestamp; + hil_frames = 0; + } + } + + if (msg->msgid == MAVLINK_MSG_ID_HIL_STATE) { + + mavlink_hil_state_t hil_state; + mavlink_msg_hil_state_decode(msg, &hil_state); + + /* Calculate Rotation Matrix */ + //TODO: better clarification which app does this, atm we have a ekf for quadrotors which does this, but there is no such thing if fly in fixed wing mode + + if (mavlink_system.type == MAV_TYPE_FIXED_WING) { + //TODO: assuming low pitch and roll values for now + hil_attitude.R[0][0] = cosf(hil_state.yaw); + hil_attitude.R[0][1] = sinf(hil_state.yaw); + hil_attitude.R[0][2] = 0.0f; + + hil_attitude.R[1][0] = -sinf(hil_state.yaw); + hil_attitude.R[1][1] = cosf(hil_state.yaw); + hil_attitude.R[1][2] = 0.0f; + + hil_attitude.R[2][0] = 0.0f; + hil_attitude.R[2][1] = 0.0f; + hil_attitude.R[2][2] = 1.0f; + + hil_attitude.R_valid = true; + } + + hil_global_pos.lat = hil_state.lat; + hil_global_pos.lon = hil_state.lon; + hil_global_pos.alt = hil_state.alt / 1000.0f; + hil_global_pos.vx = hil_state.vx / 100.0f; + hil_global_pos.vy = hil_state.vy / 100.0f; + hil_global_pos.vz = hil_state.vz / 100.0f; + + + /* set timestamp and notify processes (broadcast) */ + hil_global_pos.timestamp = hrt_absolute_time(); + orb_publish(ORB_ID(vehicle_global_position), pub_hil_global_pos, &hil_global_pos); + + hil_attitude.roll = hil_state.roll; + hil_attitude.pitch = hil_state.pitch; + hil_attitude.yaw = hil_state.yaw; + hil_attitude.rollspeed = hil_state.rollspeed; + hil_attitude.pitchspeed = hil_state.pitchspeed; + hil_attitude.yawspeed = hil_state.yawspeed; + + /* set timestamp and notify processes (broadcast) */ + hil_attitude.timestamp = hrt_absolute_time(); + orb_publish(ORB_ID(vehicle_attitude), pub_hil_attitude, &hil_attitude); + } + + if (msg->msgid == MAVLINK_MSG_ID_MANUAL_CONTROL) { + mavlink_manual_control_t man; + mavlink_msg_manual_control_decode(msg, &man); + + struct rc_channels_s rc_hil; + memset(&rc_hil, 0, sizeof(rc_hil)); + static orb_advert_t rc_pub = 0; + + rc_hil.timestamp = hrt_absolute_time(); + rc_hil.chan_count = 4; + + rc_hil.chan[0].scaled = man.x / 1000.0f; + rc_hil.chan[1].scaled = man.y / 1000.0f; + rc_hil.chan[2].scaled = man.r / 1000.0f; + rc_hil.chan[3].scaled = man.z / 1000.0f; + + struct manual_control_setpoint_s mc; + static orb_advert_t mc_pub = 0; + + int manual_sub = orb_subscribe(ORB_ID(manual_control_setpoint)); + + /* get a copy first, to prevent altering values that are not sent by the mavlink command */ + orb_copy(ORB_ID(manual_control_setpoint), manual_sub, &mc); + + mc.timestamp = rc_hil.timestamp; + mc.roll = man.x / 1000.0f; + mc.pitch = man.y / 1000.0f; + mc.yaw = man.r / 1000.0f; + mc.throttle = man.z / 1000.0f; + + /* fake RC channels with manual control input from simulator */ + + + if (rc_pub == 0) { + rc_pub = orb_advertise(ORB_ID(rc_channels), &rc_hil); + + } else { + orb_publish(ORB_ID(rc_channels), rc_pub, &rc_hil); + } + + if (mc_pub == 0) { + mc_pub = orb_advertise(ORB_ID(manual_control_setpoint), &mc); + + } else { + orb_publish(ORB_ID(manual_control_setpoint), mc_pub, &mc); + } + } + } +} + + +/** + * Receive data from UART. + */ +static void * +receive_thread(void *arg) +{ + int uart_fd = *((int *)arg); + + const int timeout = 1000; + uint8_t buf[32]; + + mavlink_message_t msg; + + prctl(PR_SET_NAME, "mavlink uart rcv", getpid()); + + while (!thread_should_exit) { + + struct pollfd fds[] = { { .fd = uart_fd, .events = POLLIN } }; + + if (poll(fds, 1, timeout) > 0) { + /* non-blocking read. read may return negative values */ + ssize_t nread = read(uart_fd, buf, sizeof(buf)); + + /* if read failed, this loop won't execute */ + for (ssize_t i = 0; i < nread; i++) { + if (mavlink_parse_char(chan, buf[i], &msg, &status)) { + /* handle generic messages and commands */ + handle_message(&msg); + + /* Handle packet with waypoint component */ + mavlink_wpm_message_handler(&msg, &global_pos, &local_pos); + + /* Handle packet with parameter component */ + mavlink_pm_message_handler(MAVLINK_COMM_0, &msg); + } + } + } + } + + return NULL; +} + +pthread_t +receive_start(int uart) +{ + pthread_attr_t receiveloop_attr; + pthread_attr_init(&receiveloop_attr); + + // set to non-blocking read + int flags = fcntl(uart, F_GETFL, 0); + fcntl(uart, F_SETFL, flags | O_NONBLOCK); + + struct sched_param param; + param.sched_priority = SCHED_PRIORITY_MAX - 40; + (void)pthread_attr_setschedparam(&receiveloop_attr, ¶m); + + pthread_attr_setstacksize(&receiveloop_attr, 2048); + + pthread_t thread; + pthread_create(&thread, &receiveloop_attr, receive_thread, &uart); + return thread; +} |