mirror of https://github.com/ArduPilot/ardupilot
227 lines
6.6 KiB
C++
227 lines
6.6 KiB
C++
/*
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(c) 2017 night_ghost@ykoctpa.ru
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*/
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#pragma GCC optimize ("O2")
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#include <AP_HAL/HAL.h>
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#include <exti.h>
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#include <timer.h>
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#include "RCInput.h"
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#include <pwm_in.h>
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#include <AP_HAL/utility/dsm.h>
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#include <AP_HAL/utility/sumd.h>
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#include "sbus.h"
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#include "GPIO.h"
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#include "ring_buffer_pulse.h"
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#include "RC_DSM_parser.h"
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using namespace F4Light;
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extern const AP_HAL::HAL& hal;
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#if defined(BOARD_DSM_USART)
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UARTDriver DSM_parser::uartSDriver(BOARD_DSM_USART); // UART connected to DSM pin
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#endif
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void DSM_parser::init(uint8_t ch) {
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#if defined(BOARD_SPEKTRUM_RX_PIN)
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memset((void *)&_val[0], 0, sizeof(_val));
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memset((void *)&dsm, 0, sizeof(dsm));
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_last_signal=0;
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_last_change =0;
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uint32_t sig = board_get_rtc_register(RTC_DSM_BIND_REG);
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if( (sig & ~DSM_BIND_SIGN_MASK) == DSM_BIND_SIGNATURE) {
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board_set_rtc_register(0, RTC_DSM_BIND_REG);
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_rc_bind(sig & DSM_BIND_SIGN_MASK);
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}
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GPIO::_pinMode(BOARD_SPEKTRUM_RX_PIN, INPUT_PULLUP);
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#ifdef BOARD_SPEKTRUM_PWR_PIN
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GPIO::_pinMode(BOARD_SPEKTRUM_PWR_PIN, OUTPUT);
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GPIO::_write(BOARD_SPEKTRUM_PWR_PIN, BOARD_SPEKTRUM_PWR_ON);
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#endif
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_ioc = Scheduler::register_io_completion(FUNCTOR_BIND_MEMBER(&DSM_parser::_io_completion, void));
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uartSDriver.end(); // just for case
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// initialize DSM UART
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uartSDriver.begin(115200);
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Revo_handler h = { .mp = FUNCTOR_BIND_MEMBER(&DSM_parser::add_dsm_uart_input, void) };
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uartSDriver.setCallback(h.h);
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}
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/*
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add some bytes of input in DSM serial stream format, coping with partial packets - UART input callback
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*/
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void DSM_parser::add_dsm_uart_input() {
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if(_ioc) {
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Scheduler::do_io_completion(_ioc);
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}
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}
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void DSM_parser::_io_completion(){
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while(uartSDriver.available()){
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// at least 1 byte we have
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const uint8_t dsm_frame_size = sizeof(dsm.frame);
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uint32_t now = AP_HAL::millis();
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if (now - dsm.last_input_ms > 5) {
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// resync based on time
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dsm.partial_frame_count = 0;
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}
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dsm.last_input_ms = now;
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if (dsm.partial_frame_count + 1 > dsm_frame_size) {
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return; // we can't add bytes to buffer
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}
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char c= uartSDriver.read();
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if(state != S_DSM) { // try to decode SUMD data
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uint16_t values[F4Light_RC_INPUT_NUM_CHANNELS];
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uint8_t rssi;
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uint8_t rx_count;
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uint16_t channel_count;
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if (sumd_decode(c, &rssi, &rx_count, &channel_count, values, F4Light_RC_INPUT_NUM_CHANNELS) == 0) {
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if (channel_count > F4Light_RC_INPUT_NUM_CHANNELS) {
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continue;
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}
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state=S_SUMD;
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for (uint8_t i=0; i<channel_count; i++) {
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if (values[i] != 0) {
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if(_val[i] != values[i]) _last_change = systick_uptime();
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_val[i] = values[i];
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}
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}
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_channels = channel_count + 1;
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_last_signal = systick_uptime();
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_val[channel_count] = rssi; // say about RSSI in last channel
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}
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}
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if(state!=S_SUMD) {
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dsm.frame[dsm.partial_frame_count] = c;
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dsm.partial_frame_count += 1;
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if (dsm.partial_frame_count == dsm_frame_size) {
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dsm.partial_frame_count = 0;
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uint16_t values[F4Light_RC_INPUT_NUM_CHANNELS] {};
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uint16_t num_values=0;
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if (dsm_decode(AP_HAL::micros64(), dsm.frame, values, &num_values, 16) &&
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num_values >= 5 && num_values <F4Light_RC_INPUT_NUM_CHANNELS) {
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state=S_DSM;
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for (uint8_t i=0; i<num_values; i++) {
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if (values[i] != 0) {
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if(_val[i] != values[i]) _last_change = systick_uptime();
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_val[i] = values[i];
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}
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}
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/*
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the apparent number of channels can change on DSM,
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as they are spread across multiple frames. We just
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use the max num_values we get
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*/
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uint8_t nc = num_values+1;
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if (nc > _channels) {
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_channels = nc;
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}
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/*
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DSM frame from datasheet:
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typedef stuct {
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UINT8 fades;
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UINT8 system;
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UINT16 servo[7];
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} INT_REMOTE_STR;
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so we get RSSI from 1st byte and store it to last channel
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*/
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_val[_channels-1] = dsm.frame[0];
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_last_signal = systick_uptime();
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}
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}
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}
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}
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#endif // defined(BOARD_SPEKTRUM_RX_PIN)
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}
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#ifdef BOARD_SPEKTRUM_RX_PIN
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void DSM_parser::_rc_bind(uint16_t dsmMode){
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/*
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To put a receiver into bind mode, within 200ms of power application the host device needs to issue a
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series of falling pulses. The number of pulses issued selects which bind types will be accepted from
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the transmitter. Selecting the 11ms mode automatically allows either 11ms or 22ms protocols to be
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used. Selecting DSMX will automatically allow DSM2 to be used if the transmitter is unable to
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support DSMX. For this reason, we recommend that 11ms DSMX be used (9 (“internal”) or 10
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(“external”) pulses).
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DSMX Bind Modes:
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Pulses Mode Protocol Type
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7 Internal DSMx 22ms
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8 External DSMx 22ms
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9 Internal DSMx 11ms
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10 External DSMx 11ms
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see https://github.com/SpektrumFPV/SpektrumDocumentation/blob/master/Telemetry/Remote%20Receiver%20Interfacing.pdf
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*/
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Scheduler::_delay(72);
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for (int i = 0; i < dsmMode; i++) { /*Pulse RX pin a number of times*/
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Scheduler::_delay_microseconds(120);
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GPIO::_write(BOARD_SPEKTRUM_RX_PIN, 0);
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Scheduler::_delay_microseconds(120);
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GPIO::_write(BOARD_SPEKTRUM_RX_PIN, 1);
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}
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Scheduler::_delay(50);
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}
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bool DSM_parser::bind(int dsmMode) const {
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#ifdef BOARD_SPEKTRUM_PWR_PIN
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uartSDriver.end();
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GPIO::_write(BOARD_SPEKTRUM_PWR_PIN, BOARD_SPEKTRUM_PWR_OFF); /* power down DSM satellite */
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Scheduler::_delay(500);
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GPIO::_write(BOARD_SPEKTRUM_PWR_PIN, BOARD_SPEKTRUM_PWR_ON); /* power up DSM satellite*/
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GPIO::_pinMode(BOARD_SPEKTRUM_RX_PIN, OUTPUT); /*Set UART RX pin to active output mode*/
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_rc_bind(dsmMode);
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uartSDriver.begin(115200); /*Restore USART RX pin to RS232 receive mode*/
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#else
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// store request to bing in BACKUP RAM
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board_set_rtc_register(DSM_BIND_SIGNATURE | ( dsmMode & DSM_BIND_SIGN_MASK), RTC_DSM_BIND_REG);
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#endif
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return true;
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}
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#endif // BOARD_SPEKTRUM_RX_PIN
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