ardupilot/APMrover2/sensors.cpp

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// -*- tab-width: 4; Mode: C++; c-basic-offset: 4; indent-tabs-mode: nil -*-
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#include "Rover.h"
void Rover::init_barometer(void)
{
gcs_send_text_P(SEVERITY_LOW, PSTR("Calibrating barometer"));
barometer.calibrate();
gcs_send_text_P(SEVERITY_LOW, PSTR("barometer calibration complete"));
}
void Rover::init_sonar(void)
{
sonar.init();
}
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// read_battery - reads battery voltage and current and invokes failsafe
// should be called at 10hz
void Rover::read_battery(void)
{
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battery.read();
}
// read the receiver RSSI as an 8 bit number for MAVLink
// RC_CHANNELS_SCALED message
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void Rover::read_receiver_rssi(void)
{
rssi_analog_source->set_pin(g.rssi_pin);
float ret = rssi_analog_source->voltage_average() * 50;
receiver_rssi = constrain_int16(ret, 0, 255);
}
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// read the sonars
void Rover::read_sonars(void)
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{
sonar.update();
if (sonar.status() == RangeFinder::RangeFinder_NotConnected) {
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// this makes it possible to disable sonar at runtime
return;
}
if (sonar.has_data(1)) {
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// we have two sonars
obstacle.sonar1_distance_cm = sonar.distance_cm(0);
obstacle.sonar2_distance_cm = sonar.distance_cm(1);
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if (obstacle.sonar1_distance_cm <= (uint16_t)g.sonar_trigger_cm &&
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obstacle.sonar1_distance_cm <= (uint16_t)obstacle.sonar2_distance_cm) {
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// we have an object on the left
if (obstacle.detected_count < 127) {
obstacle.detected_count++;
}
if (obstacle.detected_count == g.sonar_debounce) {
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gcs_send_text_fmt(PSTR("Sonar1 obstacle %u cm"),
(unsigned)obstacle.sonar1_distance_cm);
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}
obstacle.detected_time_ms = hal.scheduler->millis();
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obstacle.turn_angle = g.sonar_turn_angle;
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} else if (obstacle.sonar2_distance_cm <= (uint16_t)g.sonar_trigger_cm) {
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// we have an object on the right
if (obstacle.detected_count < 127) {
obstacle.detected_count++;
}
if (obstacle.detected_count == g.sonar_debounce) {
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gcs_send_text_fmt(PSTR("Sonar2 obstacle %u cm"),
(unsigned)obstacle.sonar2_distance_cm);
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}
obstacle.detected_time_ms = hal.scheduler->millis();
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obstacle.turn_angle = -g.sonar_turn_angle;
}
} else {
// we have a single sonar
obstacle.sonar1_distance_cm = sonar.distance_cm(0);
obstacle.sonar2_distance_cm = 0;
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if (obstacle.sonar1_distance_cm <= (uint16_t)g.sonar_trigger_cm) {
// obstacle detected in front
if (obstacle.detected_count < 127) {
obstacle.detected_count++;
}
if (obstacle.detected_count == g.sonar_debounce) {
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gcs_send_text_fmt(PSTR("Sonar obstacle %u cm"),
(unsigned)obstacle.sonar1_distance_cm);
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}
obstacle.detected_time_ms = hal.scheduler->millis();
obstacle.turn_angle = g.sonar_turn_angle;
}
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}
Log_Write_Sonar();
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// no object detected - reset after the turn time
if (obstacle.detected_count >= g.sonar_debounce &&
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hal.scheduler->millis() > obstacle.detected_time_ms + g.sonar_turn_time*1000) {
gcs_send_text_fmt(PSTR("Obstacle passed"));
obstacle.detected_count = 0;
obstacle.turn_angle = 0;
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}
}