ardupilot/APMrover2/radio.pde

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// -*- tab-width: 4; Mode: C++; c-basic-offset: 4; indent-tabs-mode: nil -*-
//Function that will read the radio data, limit servos and trigger a failsafe
// ----------------------------------------------------------------------------
static uint8_t failsafeCounter = 0; // we wait a second to take over the throttle and send the plane circling
static void init_rc_in()
{
// set rc channel ranges
g.channel_steer.set_angle(SERVO_MAX);
g.channel_throttle.set_angle(100);
// set rc dead zones
g.channel_steer.set_dead_zone(60);
g.channel_throttle.set_dead_zone(6);
//set auxiliary ranges
update_aux_servo_function(&g.rc_5, &g.rc_6, &g.rc_7, &g.rc_8);
}
static void init_rc_out()
{
hal.rcout->enable_ch(CH_1);
hal.rcout->enable_ch(CH_2);
hal.rcout->enable_ch(CH_3);
hal.rcout->enable_ch(CH_4);
hal.rcout->enable_ch(CH_5);
hal.rcout->enable_ch(CH_6);
hal.rcout->enable_ch(CH_7);
hal.rcout->enable_ch(CH_8);
#if HIL_MODE != HIL_MODE_ATTITUDE
hal.rcout->write(CH_1, g.channel_steer.radio_trim); // Initialization of servo outputs
hal.rcout->write(CH_3, g.channel_throttle.radio_trim);
hal.rcout->write(CH_5, g.rc_5.radio_trim);
hal.rcout->write(CH_6, g.rc_6.radio_trim);
hal.rcout->write(CH_7, g.rc_7.radio_trim);
hal.rcout->write(CH_8, g.rc_8.radio_trim);
#else
hal.rcout->write(CH_1, 1500); // Initialization of servo outputs
hal.rcout->write(CH_2, 1500);
hal.rcout->write(CH_3, 1000);
hal.rcout->write(CH_4, 1500);
hal.rcout->write(CH_5, 1500);
hal.rcout->write(CH_6, 1500);
hal.rcout->write(CH_7, 1500);
hal.rcout->write(CH_8, 2000);
#endif
}
static void read_radio()
{
g.channel_steer.set_pwm(hal.rcin->read(CH_ROLL));
g.channel_throttle.set_pwm(hal.rcin->read(CH_3));
g.rc_5.set_pwm(hal.rcin->read(CH_5));
g.rc_6.set_pwm(hal.rcin->read(CH_6));
g.rc_7.set_pwm(hal.rcin->read(CH_7));
g.rc_8.set_pwm(hal.rcin->read(CH_8));
control_failsafe(g.channel_throttle.radio_in);
g.channel_throttle.servo_out = g.channel_throttle.control_in;
if (g.channel_throttle.servo_out > 50) {
throttle_nudge = (g.throttle_max - g.throttle_cruise) * ((g.channel_throttle.norm_input()-0.5) / 0.5);
} else {
throttle_nudge = 0;
}
/*
cliSerial->printf_P(PSTR("OUT 1: %d\t2: %d\t3: %d\t4: %d \n"),
g.rc_1.control_in,
g.rc_2.control_in,
g.rc_3.control_in,
g.rc_4.control_in);
*/
}
static void control_failsafe(uint16_t pwm)
{
if (!g.fs_throttle_enabled) {
// no throttle failsafe
return;
}
// Check for failsafe condition based on loss of GCS control
if (rc_override_active) {
if(millis() - rc_override_fs_timer > FAILSAFE_SHORT_TIME) {
ch3_failsafe = true;
} else {
ch3_failsafe = false;
}
//Check for failsafe and debounce funky reads
} else if (g.fs_throttle_enabled) {
if (pwm < (unsigned)g.fs_throttle_value){
// we detect a failsafe from radio
// throttle has dropped below the mark
failsafeCounter++;
if (failsafeCounter == 9){
gcs_send_text_fmt(PSTR("MSG FS ON %u"), (unsigned)pwm);
}else if(failsafeCounter == 10) {
ch3_failsafe = true;
}else if (failsafeCounter > 10){
failsafeCounter = 11;
}
}else if(failsafeCounter > 0){
// we are no longer in failsafe condition
// but we need to recover quickly
failsafeCounter--;
if (failsafeCounter > 3){
failsafeCounter = 3;
}
if (failsafeCounter == 1){
gcs_send_text_fmt(PSTR("MSG FS OFF %u"), (unsigned)pwm);
}else if(failsafeCounter == 0) {
ch3_failsafe = false;
}else if (failsafeCounter <0){
failsafeCounter = -1;
}
}
}
}
static void trim_control_surfaces()
{
read_radio();
// Store control surface trim values
// ---------------------------------
if (g.channel_steer.radio_in > 1400) {
g.channel_steer.radio_trim = g.channel_steer.radio_in;
// save to eeprom
g.channel_steer.save_eeprom();
}
}
static void trim_radio()
{
for (int y = 0; y < 30; y++) {
read_radio();
}
trim_control_surfaces();
}