67 lines
2.0 KiB
C++
67 lines
2.0 KiB
C++
/*
|
|
* © 2021-2022, Harald Barth.
|
|
*
|
|
* This file is part of DCC-EX
|
|
*
|
|
* This 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.
|
|
*
|
|
* It 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 CommandStation. If not, see <https://www.gnu.org/licenses/>.
|
|
*/
|
|
|
|
#if defined(ARDUINO_ARCH_ESP32)
|
|
#pragma once
|
|
#include <Arduino.h>
|
|
#include "driver/rmt.h"
|
|
#include "soc/rmt_reg.h"
|
|
#include "soc/rmt_struct.h"
|
|
#include "MotorDriver.h" // for class pinpair
|
|
|
|
// make calculations easy and set up for microseconds
|
|
#define RMT_CLOCK_DIVIDER 80
|
|
#define DCC_1_HALFPERIOD 58 //4640 // 1 / 80000000 * 4640 = 58us
|
|
#define DCC_0_HALFPERIOD 100 //8000
|
|
|
|
class RMTChannel {
|
|
public:
|
|
RMTChannel(pinpair pins, bool isMain);
|
|
bool addPin(byte pin, bool inverted=0);
|
|
bool addPin(pinpair pins);
|
|
void IRAM_ATTR RMTinterrupt();
|
|
void RMTprefill();
|
|
//int RMTfillData(dccPacket packet);
|
|
int RMTfillData(const byte buffer[], byte byteCount, byte repeatCount);
|
|
inline bool busy() {
|
|
if (dataRepeat > 0) // we have still old work to do
|
|
return true;
|
|
return dataReady;
|
|
};
|
|
inline uint32_t packetCount() { return packetCounter; };
|
|
|
|
private:
|
|
|
|
rmt_channel_t channel;
|
|
// 3 types of data to send, preamble and then idle or data
|
|
// if this is prog track, idle will contain reset instead
|
|
rmt_item32_t *idle;
|
|
byte idleLen;
|
|
rmt_item32_t *preamble;
|
|
byte preambleLen;
|
|
rmt_item32_t *data;
|
|
byte dataLen;
|
|
byte maxDataLen;
|
|
uint32_t packetCounter = 0;
|
|
// flags
|
|
volatile bool dataReady = false; // do we have real data available or send idle
|
|
volatile byte dataRepeat = 0;
|
|
};
|
|
#endif //ESP32
|