ardupilot/libraries/AP_HAL_ESP32/RCInput.cpp

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/*
* This file is free software: you can redistribute it and/or modify it
* under the terms of the GNU General Public License as published by the
* Free Software Foundation, either version 3 of the License, or
* (at your option) any later version.
*
* This file is distributed in the hope that it will be useful, but
* WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
* See the GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License along
* with this program. If not, see <http://www.gnu.org/licenses/>.
*/
#include <AP_Math/AP_Math.h>
#include <GCS_MAVLink/GCS.h>
#include "AP_HAL_ESP32.h"
#include "RCInput.h"
using namespace ESP32;
void RCInput::init()
{
if (_init) {
return;
}
#ifndef HAL_BUILD_AP_PERIPH
AP::RC().init();
#endif
#ifdef HAL_ESP32_RCIN
sig_reader.init();
#endif
_init = true;
}
bool RCInput::new_input()
{
if (!_init) {
return false;
}
bool valid;
{
WITH_SEMAPHORE(rcin_mutex);
valid = _rcin_timestamp_last_signal != _last_read;
_last_read = _rcin_timestamp_last_signal;
}
return valid;
}
uint8_t RCInput::num_channels()
{
if (!_init) {
return 0;
}
return _num_channels;
}
uint16_t RCInput::read(uint8_t channel)
{
if (!_init || (channel >= MIN(RC_INPUT_MAX_CHANNELS, _num_channels))) {
return 0;
}
uint16_t v;
{
WITH_SEMAPHORE(rcin_mutex);
v = _rc_values[channel];
}
return v;
}
uint8_t RCInput::read(uint16_t* periods, uint8_t len)
{
if (!_init) {
return false;
}
if (len > RC_INPUT_MAX_CHANNELS) {
len = RC_INPUT_MAX_CHANNELS;
}
{
WITH_SEMAPHORE(rcin_mutex);
memcpy(periods, _rc_values, len*sizeof(periods[0]));
}
return len;
}
void RCInput::_timer_tick(void)
{
if (!_init) {
return;
}
AP_RCProtocol &rcprot = AP::RC();
#ifdef HAL_ESP32_RCIN
uint32_t width_s0, width_s1;
while (sig_reader.read(width_s0, width_s1)) {
rcprot.process_pulse(width_s0, width_s1);
}
#ifndef HAL_NO_UARTDRIVER
const char *rc_protocol = nullptr;
#endif
if (rcprot.new_input()) {
WITH_SEMAPHORE(rcin_mutex);
_rcin_timestamp_last_signal = AP_HAL::micros();
_num_channels = rcprot.num_channels();
_num_channels = MIN(_num_channels, RC_INPUT_MAX_CHANNELS);
rcprot.read(_rc_values, _num_channels);
_rssi = rcprot.get_RSSI();
#ifndef HAL_NO_UARTDRIVER
rc_protocol = rcprot.protocol_name();
#endif
}
#ifndef HAL_NO_UARTDRIVER
if (rc_protocol && rc_protocol != last_protocol) {
last_protocol = rc_protocol;
gcs().send_text(MAV_SEVERITY_DEBUG, "RCInput: decoding %s", last_protocol);
}
#endif
#endif
}