ardupilot/libraries/AP_Mount/AP_Mount_SToRM32_serial.cpp

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#include "AP_Mount_SToRM32_serial.h"
#include <AP_HAL/AP_HAL.h>
#include <GCS_MAVLink/GCS_MAVLink.h>
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#include <GCS_MAVLink/include/mavlink/v2.0/checksum.h>
#include <AP_HAL/utility/RingBuffer.h>
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extern const AP_HAL::HAL& hal;
AP_Mount_SToRM32_serial::AP_Mount_SToRM32_serial(AP_Mount &frontend, AP_Mount::mount_state &state, uint8_t instance) :
AP_Mount_Backend(frontend, state, instance),
_reply_type(ReplyType_UNKNOWN)
{}
// init - performs any required initialisation for this instance
void AP_Mount_SToRM32_serial::init(const AP_SerialManager& serial_manager)
{
_port = serial_manager.find_serial(AP_SerialManager::SerialProtocol_SToRM32, 0);
if (_port) {
_initialised = true;
set_mode((enum MAV_MOUNT_MODE)_state._default_mode.get());
}
}
// update mount position - should be called periodically
void AP_Mount_SToRM32_serial::update()
{
// exit immediately if not initialised
if (!_initialised) {
return;
}
read_incoming(); // read the incoming messages from the gimbal
// flag to trigger sending target angles to gimbal
bool resend_now = false;
// update based on mount mode
switch(get_mode()) {
// move mount to a "retracted" position. To-Do: remove support and replace with a relaxed mode?
case MAV_MOUNT_MODE_RETRACT:
{
const Vector3f &target = _state._retract_angles.get();
_angle_ef_target_rad.x = ToRad(target.x);
_angle_ef_target_rad.y = ToRad(target.y);
_angle_ef_target_rad.z = ToRad(target.z);
}
break;
// move mount to a neutral position, typically pointing forward
case MAV_MOUNT_MODE_NEUTRAL:
{
const Vector3f &target = _state._neutral_angles.get();
_angle_ef_target_rad.x = ToRad(target.x);
_angle_ef_target_rad.y = ToRad(target.y);
_angle_ef_target_rad.z = ToRad(target.z);
}
break;
// point to the angles given by a mavlink message
case MAV_MOUNT_MODE_MAVLINK_TARGETING:
// do nothing because earth-frame angle targets (i.e. _angle_ef_target_rad) should have already been set by a MOUNT_CONTROL message from GCS
break;
// RC radio manual angle control, but with stabilization from the AHRS
case MAV_MOUNT_MODE_RC_TARGETING:
// update targets using pilot's rc inputs
update_targets_from_rc();
resend_now = true;
break;
// point mount to a GPS point given by the mission planner
case MAV_MOUNT_MODE_GPS_POINT:
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if(AP::gps().status() >= AP_GPS::GPS_OK_FIX_2D) {
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calc_angle_to_location(_state._roi_target, _angle_ef_target_rad, true, true);
resend_now = true;
}
break;
default:
// we do not know this mode so do nothing
break;
}
// resend target angles at least once per second
resend_now = resend_now || ((AP_HAL::millis() - _last_send) > AP_MOUNT_STORM32_SERIAL_RESEND_MS);
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if ((AP_HAL::millis() - _last_send) > AP_MOUNT_STORM32_SERIAL_RESEND_MS*2) {
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_reply_type = ReplyType_UNKNOWN;
}
if (can_send(resend_now)) {
if (resend_now) {
send_target_angles(ToDeg(_angle_ef_target_rad.y), ToDeg(_angle_ef_target_rad.x), ToDeg(_angle_ef_target_rad.z));
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get_angles();
_reply_type = ReplyType_ACK;
_reply_counter = 0;
_reply_length = get_reply_size(_reply_type);
} else {
get_angles();
_reply_type = ReplyType_DATA;
_reply_counter = 0;
_reply_length = get_reply_size(_reply_type);
}
}
}
// has_pan_control - returns true if this mount can control it's pan (required for multicopters)
bool AP_Mount_SToRM32_serial::has_pan_control() const
{
// we do not have yaw control
return false;
}
// set_mode - sets mount's mode
void AP_Mount_SToRM32_serial::set_mode(enum MAV_MOUNT_MODE mode)
{
// exit immediately if not initialised
if (!_initialised) {
return;
}
// record the mode change
_state._mode = mode;
}
// send_mount_status - called to allow mounts to send their status to GCS using the MOUNT_STATUS message
void AP_Mount_SToRM32_serial::send_mount_status(mavlink_channel_t chan)
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{
// return target angles as gimbal's actual attitude.
mavlink_msg_mount_status_send(chan, 0, 0, _current_angle.y, _current_angle.x, _current_angle.z);
}
bool AP_Mount_SToRM32_serial::can_send(bool with_control) {
uint16_t required_tx = 1;
if (with_control) {
required_tx += sizeof(AP_Mount_SToRM32_serial::cmd_set_angles_struct);
}
return (_reply_type == ReplyType_UNKNOWN) && (_port->txspace() >= required_tx);
}
// send_target_angles
void AP_Mount_SToRM32_serial::send_target_angles(float pitch_deg, float roll_deg, float yaw_deg)
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{
static cmd_set_angles_struct cmd_set_angles_data = {
0xFA,
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0x0E,
0x11,
0, // pitch
0, // roll
0, // yaw
0, // flags
0, // type
0, // crc
};
// exit immediately if not initialised
if (!_initialised) {
return;
}
if ((size_t)_port->txspace() < sizeof(cmd_set_angles_data)) {
return;
}
// reverse pitch and yaw control
pitch_deg = -pitch_deg;
yaw_deg = -yaw_deg;
// send CMD_SETANGLE
cmd_set_angles_data.pitch = pitch_deg;
cmd_set_angles_data.roll = roll_deg;
cmd_set_angles_data.yaw = yaw_deg;
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uint8_t* buf = (uint8_t*)&cmd_set_angles_data;
cmd_set_angles_data.crc = crc_calculate(&buf[1], sizeof(cmd_set_angles_data)-3);
for (uint8_t i = 0; i != sizeof(cmd_set_angles_data) ; i++) {
_port->write(buf[i]);
}
// store time of send
_last_send = AP_HAL::millis();
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}
void AP_Mount_SToRM32_serial::get_angles() {
// exit immediately if not initialised
if (!_initialised) {
return;
}
if (_port->txspace() < 1) {
return;
}
_port->write('d');
};
uint8_t AP_Mount_SToRM32_serial::get_reply_size(ReplyType reply_type) {
switch (reply_type) {
case ReplyType_DATA:
return sizeof(SToRM32_reply_data_struct);
break;
case ReplyType_ACK:
return sizeof(SToRM32_reply_ack_struct);
break;
default:
return 0;
}
}
void AP_Mount_SToRM32_serial::read_incoming() {
uint8_t data;
int16_t numc;
numc = _port->available();
if (numc < 0 ){
return;
}
for (int16_t i = 0; i < numc; i++) { // Process bytes received
data = _port->read();
if (_reply_type == ReplyType_UNKNOWN) {
continue;
}
_buffer[_reply_counter++] = data;
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if (_reply_counter == _reply_length) {
parse_reply();
switch (_reply_type) {
case ReplyType_ACK:
_reply_type = ReplyType_DATA;
_reply_length = get_reply_size(_reply_type);
_reply_counter = 0;
break;
case ReplyType_DATA:
_reply_type = ReplyType_UNKNOWN;
_reply_length = get_reply_size(_reply_type);
_reply_counter = 0;
break;
default:
_reply_length = get_reply_size(_reply_type);
_reply_counter = 0;
break;
}
}
}
}
void AP_Mount_SToRM32_serial::parse_reply() {
uint16_t crc;
bool crc_ok;
switch (_reply_type) {
case ReplyType_DATA:
crc = crc_calculate(&_buffer[0], sizeof(_buffer.data) - 3);
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crc_ok = crc == _buffer.data.crc;
if (!crc_ok) {
break;
}
_current_angle.x = _buffer.data.imu1_roll;
_current_angle.y = _buffer.data.imu1_pitch;
_current_angle.z = _buffer.data.imu1_yaw;
break;
default:
break;
}
}