ardupilot/libraries/RC_Channel/RC_Channels.cpp

234 lines
5.2 KiB
C++

/*
This program 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 program 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/>.
*/
/*
* RC_Channels.cpp - class containing an array of RC_Channel objects
*
*/
#include <stdlib.h>
#include <cmath>
#include <AP_HAL/AP_HAL.h>
extern const AP_HAL::HAL& hal;
#include <AP_Math/AP_Math.h>
#include <AP_Logger/AP_Logger.h>
#include "RC_Channel.h"
/*
channels group object constructor
*/
RC_Channels::RC_Channels(void)
{
// set defaults from the parameter table
AP_Param::setup_object_defaults(this, var_info);
if (_singleton != nullptr) {
AP_HAL::panic("RC_Channels must be singleton");
}
_singleton = this;
}
void RC_Channels::init(void)
{
// setup ch_in on channels
for (uint8_t i=0; i<NUM_RC_CHANNELS; i++) {
channel(i)->ch_in = i;
}
init_aux_all();
}
uint8_t RC_Channels::get_radio_in(uint16_t *chans, const uint8_t num_channels)
{
memset(chans, 0, num_channels*sizeof(*chans));
const uint8_t read_channels = MIN(num_channels, NUM_RC_CHANNELS);
for (uint8_t i = 0; i < read_channels; i++) {
chans[i] = channel(i)->get_radio_in();
}
return read_channels;
}
// update all the input channels
bool RC_Channels::read_input(void)
{
if (!hal.rcin->new_input() && !has_new_overrides) {
return false;
}
has_new_overrides = false;
last_update_ms = AP_HAL::millis();
bool success = false;
for (uint8_t i=0; i<NUM_RC_CHANNELS; i++) {
success |= channel(i)->update();
}
return success;
}
uint8_t RC_Channels::get_valid_channel_count(void)
{
return MIN(NUM_RC_CHANNELS, hal.rcin->num_channels());
}
int16_t RC_Channels::get_receiver_rssi(void)
{
return hal.rcin->get_rssi();
}
void RC_Channels::clear_overrides(void)
{
RC_Channels &_rc = rc();
for (uint8_t i = 0; i < NUM_RC_CHANNELS; i++) {
_rc.channel(i)->clear_override();
}
// we really should set has_new_overrides to true, and rerun read_input from
// the vehicle code however doing so currently breaks the failsafe system on
// copter and plane, RC_Channels needs to control failsafes to resolve this
}
void RC_Channels::set_override(const uint8_t chan, const int16_t value, const uint32_t timestamp_ms)
{
RC_Channels &_rc = rc();
if (chan < NUM_RC_CHANNELS) {
_rc.channel(chan)->set_override(value, timestamp_ms);
}
}
bool RC_Channels::has_active_overrides()
{
RC_Channels &_rc = rc();
for (uint8_t i = 0; i < NUM_RC_CHANNELS; i++) {
if (_rc.channel(i)->has_override()) {
return true;
}
}
return false;
}
bool RC_Channels::receiver_bind(const int dsmMode)
{
return hal.rcin->rc_bind(dsmMode);
}
// support for auxillary switches:
// read_aux_switches - checks aux switch positions and invokes configured actions
void RC_Channels::read_aux_all()
{
if (!has_valid_input()) {
// exit immediately when no RC input
return;
}
bool need_log = false;
for (uint8_t i=0; i<NUM_RC_CHANNELS; i++) {
RC_Channel *c = channel(i);
if (c == nullptr) {
continue;
}
need_log |= c->read_aux();
}
if (need_log) {
// guarantee that we log when a switch changes
AP::logger().Write_RCIN();
}
}
void RC_Channels::init_aux_all()
{
for (uint8_t i=0; i<NUM_RC_CHANNELS; i++) {
RC_Channel *c = channel(i);
if (c == nullptr) {
continue;
}
c->init_aux();
}
reset_mode_switch();
}
//
// Support for mode switches
//
RC_Channel *RC_Channels::flight_mode_channel()
{
const int8_t num = flight_mode_channel_number();
if (num <= 0) {
return nullptr;
}
if (num >= NUM_RC_CHANNELS) {
return nullptr;
}
return channel(num-1);
}
void RC_Channels::reset_mode_switch()
{
RC_Channel *c = flight_mode_channel();
if (c == nullptr) {
return;
}
c->reset_mode_switch();
}
void RC_Channels::read_mode_switch()
{
if (!has_valid_input()) {
// exit immediately when no RC input
return;
}
RC_Channel *c = flight_mode_channel();
if (c == nullptr) {
return;
}
c->read_mode_switch();
}
/*
get the RC input PWM value given a channel number. Note that
channel numbers start at 1, as this API is designed for use in
LUA
*/
bool RC_Channels::get_pwm(uint8_t c, uint16_t &pwm) const
{
RC_Channel *chan = rc_channel(c-1);
if (chan == nullptr) {
return false;
}
int16_t pwm_signed = chan->get_radio_in();
if (pwm_signed < 0) {
return false;
}
pwm = (uint16_t)pwm_signed;
return true;
}
// singleton instance
RC_Channels *RC_Channels::_singleton;
RC_Channels &rc()
{
return *RC_Channels::get_singleton();
}