mirror of
https://github.com/DCC-EX/CommandStation-EX.git
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590 lines
22 KiB
C++
590 lines
22 KiB
C++
/*
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* © 2023, Neil McKechnie. All rights reserved.
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*
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* This file is part of DCC++EX API
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*
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* This is free software: you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation, either version 3 of the License, or
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* (at your option) any later version.
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*
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* It is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with CommandStation. If not, see <https://www.gnu.org/licenses/>.
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*/
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/*
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* DFPlayer is an MP3 player module with an SD card holder. It also has an integrated
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* amplifier, so it only needs a power supply and a speaker.
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*
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* This driver allows the device to be controlled through IODevice::write() and
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* IODevice::writeAnalogue() calls.
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*
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* The driver is configured as follows:
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*
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* DFPlayer::create(firstVpin, nPins, Serialn);
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*
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* Where firstVpin is the first vpin reserved for reading the device,
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* nPins is the number of pins to be allocated (max 5)
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* and Serialn is the name of the Serial port connected to the DFPlayer (e.g. Serial1).
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*
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* Example:
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* In halSetup function within myHal.cpp:
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* DFPlayer::create(3500, 5, Serial1);
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* or in myAutomation.h:
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* HAL(DFPlayer, 3500, 5, Serial1)
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*
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* Writing an analogue value 1-2999 to the first pin (3500) will play the numbered file from the
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* SD card; e.g. a value of 1 will play the first file, 2 for the second file etc.
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* Writing an analogue value 0 to the first pin (3500) will stop the file playing;
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* Writing an analogue value 0-30 to the second pin (3501) will set the volume;
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* Writing a digital value of 1 to a pin will play the file corresponding to that pin, e.g.
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the first file will be played by setting pin 3500, the second by setting pin 3501 etc.;
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* Writing a digital value of 0 to any pin will stop the player;
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* Reading a digital value from any pin will return true(1) if the player is playing, false(0) otherwise.
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*
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* From EX-RAIL, the following commands may be used:
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* SET(3500) -- starts playing the first file (file 1) on the SD card
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* SET(3501) -- starts playing the second file (file 2) on the SD card
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* etc.
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* RESET(3500) -- stops all playing on the player
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* WAITFOR(3500) -- wait for the file currently being played by the player to complete
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* SERVO(3500,2,Instant) -- plays file 2 at current volume
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* SERVO(3501,20,Instant) -- Sets the volume to 20
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*
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* NB The DFPlayer's serial lines are not 5V safe, so connecting the Arduino TX directly
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* to the DFPlayer's RX terminal will cause lots of noise over the speaker, or worse.
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* A 1k resistor in series with the module's RX terminal will alleviate this.
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*
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* Files on the SD card are numbered according to their order in the directory on the
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* card (as listed by the DIR command in Windows). This may not match the order of the files
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* as displayed by Windows File Manager, which sorts the file names. It is suggested that
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* files be copied into an empty SDcard in the desired order, one at a time.
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*
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* The driver now polls the device for its current status every second. Should the device
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* fail to respond it will be marked off-line and its busy indicator cleared, to avoid
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* lock-ups in automation scripts that are executing for a WAITFOR().
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*
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* *********************************************************************************************
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* 2023, Added NXP SC16IS752 I2C Dual UART to enable the DFPlayer connection over the I2C bus
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* The SC16IS752 has 64 bytes TX & RX FIFO buffer
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* First version without interrupts from I2C UART and only RX/TX are used, interrupts may not be needed as the RX Fifo holds the reply
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*
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*
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*/
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#ifndef IO_I2CDFPlayer_h
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#define IO_I2CDFPlayer_h
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#include "IODevice.h"
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#include "I2CManager.h"
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#include "DIAG.h"
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//#define DIAG_I2CDFplayer
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//#define DIAG_I2CDFplayer_data
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//#define DIAG_I2CDFplayer_reg
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class I2CDFPlayer : public IODevice {
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private:
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const uint8_t MAXVOLUME=30;
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bool _playing = false;
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uint8_t _inputIndex = 0;
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unsigned long _commandSendTime; // Time (us) that last transmit took place.
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unsigned long _timeoutTime;
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uint8_t _recvCMD; // Last received command code byte
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bool _awaitingResponse = false;
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uint8_t _requestedVolumeLevel = MAXVOLUME;
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uint8_t _currentVolume = MAXVOLUME;
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int _requestedSong = -1; // -1=none, 0=stop, >0=file number
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// SC16IS752 defines
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I2CAddress _I2CAddress;
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I2CRB _rb;
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uint8_t _UART_CH;
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// Communication parameters for the DFPlayer are fixed at 8 bit, No parity, 1 stopbit
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uint8_t WORD_LEN = 0x03; // Value LCR bit 0,1
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uint8_t STOP_BIT = 0x00; // Value LCR bit 2
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uint8_t PARITY_ENA = 0x00; // Value LCR bit 3
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uint8_t PARITY_TYPE = 0x00; // Value LCR bit 4
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uint32_t BAUD_RATE = 9600;
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uint8_t PRESCALER = 0x01; // Value MCR bit 7
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uint8_t TEMP_REG_VAL = 0x00;
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uint8_t FIFO_RX_LEVEL = 0x00;
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uint8_t FIFO_TX_LEVEL = 0x00;
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uint8_t _outbuffer [11]; // DFPlayer command is 10 bytes + 1 byte register address & UART channel
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uint8_t _inbuffer[10]; // expected DFPlayer return 10 bytes
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unsigned long SC16IS752_XTAL_FREQ = 1843200; // May need to change xtal frequency to 14.7456Mhz (14745600) to allow for higher baud rates
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//unsigned long SC16IS752_XTAL_FREQ = 14745600; // Support for higher baud rates
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public:
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// Constructor
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I2CDFPlayer(VPIN firstVpin, int nPins, I2CAddress i2cAddress, uint8_t UART_CH){
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_firstVpin = firstVpin;
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_nPins = nPins;
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_I2CAddress = i2cAddress;
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_UART_CH = UART_CH;
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addDevice(this);
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}
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public:
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static void create(VPIN firstVpin, int nPins, I2CAddress i2cAddress, uint8_t UART_CH) {
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if (checkNoOverlap(firstVpin, nPins, i2cAddress)) new I2CDFPlayer(firstVpin, nPins, i2cAddress, UART_CH);
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}
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void _begin() override {
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// check if SC16IS752 exist first, initialize and then resume DFPlayer init via SC16IS752
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I2CManager.begin();
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//I2CManager.setClock(1000000);
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if (I2CManager.exists(_I2CAddress)){
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DIAG(F("SC16IS752 I2C:%s UART detected"), _I2CAddress.toString());
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Init_SC16IS752(); // Initialize UART
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if (_deviceState == DEVSTATE_FAILED){
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DIAG(F("SC16IS752 I2C:%s UART initialization failed"), _I2CAddress.toString());
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}
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} else {
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DIAG(F("SC16IS752 I2C:%s UART not detected"), _I2CAddress.toString());
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}
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#if defined(DIAG_IO)
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_display();
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#endif
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// Now init DFPlayer
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// Send a query to the device to see if it responds
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_deviceState = DEVSTATE_INITIALISING;
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sendPacket(0x42);
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_timeoutTime = micros() + 5000000UL; // 5 second timeout
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//_timeoutTime = micros() + 10000000UL; // 5 second timeout
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_awaitingResponse = true;
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}
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void _loop(unsigned long currentMicros) override {
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// Read responses from device
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processIncoming();
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// Check if a command sent to device has timed out. Allow 0.5 second for response
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if (_awaitingResponse && (int32_t)(currentMicros - _timeoutTime) > 0) {
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DIAG(F("I2CDFPlayer:%s, DFPlayer not responding on UART channel: 0x%x"), _I2CAddress.toString(), _UART_CH);
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_deviceState = DEVSTATE_FAILED;
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_awaitingResponse = false;
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_playing = false;
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}
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// Send any commands that need to go.
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processOutgoing(currentMicros);
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delayUntil(currentMicros + 10000); // Only enter every 10ms
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}
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// Check for incoming data on _serial, and update busy flag and other state accordingly
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void processIncoming() {
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// Expected message is in the form "7E FF 06 3D xx xx xx xx xx EF"
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RX_fifo_lvl();
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if (FIFO_RX_LEVEL >= 10) {
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#ifdef DIAG_I2CDFplayer
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DIAG(F("I2CDFPlayer: %s Retrieving data from RX Fifo on UART_CH: 0x%x"),_I2CAddress.toString(), _UART_CH);
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#endif
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ReceiveI2CData();
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} else {
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return; // No data or not enough data in rx fifo, check again next time around
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}
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bool ok = false;
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while (FIFO_RX_LEVEL != 0) {
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int c = _inbuffer[_inputIndex]; // Start at 0, increment to FIFO_RX_LEVEL
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switch (_inputIndex) {
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case 0:
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if (c == 0x7E) ok = true;
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break;
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case 1:
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if (c == 0xFF) ok = true;
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break;
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case 2:
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if (c== 0x06) ok = true;
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break;
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case 3:
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_recvCMD = c; // CMD byte
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ok = true;
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break;
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case 6:
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switch (_recvCMD) {
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case 0x42:
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// Response to status query
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_playing = (c != 0);
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// Mark the device online and cancel timeout
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if (_deviceState==DEVSTATE_INITIALISING) {
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_deviceState = DEVSTATE_NORMAL;
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#ifdef DIAG_I2CDFplayer
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DIAG(F("I2CDFPlayer: %s, UART_CH: 0x0%x, _deviceState: 0x0%x"),_I2CAddress.toString(), _UART_CH, _deviceState);
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#endif
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#ifdef DIAG_IO
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_display();
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#endif
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}
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_awaitingResponse = false;
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break;
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case 0x3d:
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// End of play
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if (_playing) {
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#ifdef DIAG_IO
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DIAG(F("I2CDFPlayer: Finished"));
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#endif
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_playing = false;
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}
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break;
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case 0x40:
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// Error codes; 1: Module Busy
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DIAG(F("I2CDFPlayer: Error %d returned from device"), c);
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_playing = false;
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break;
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}
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ok = true;
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break;
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case 4: case 5: case 7: case 8:
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ok = true; // Skip over these bytes in message.
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break;
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case 9:
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if (c==0xef) {
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// Message finished
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}
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break;
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default:
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break;
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}
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if (ok){
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_inputIndex++; // character as expected, so increment index
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FIFO_RX_LEVEL --; // Decrease FIFO_RX_LEVEL with each character read from _inbuffer[_inputIndex]
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} else {
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_inputIndex = 0; // otherwise reset.
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FIFO_RX_LEVEL = 0;
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}
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}
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}
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// Send any commands that need to be sent
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void processOutgoing(unsigned long currentMicros) {
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// When two commands are sent in quick succession, the device will often fail to
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// execute one. Testing has indicated that a delay of 100ms or more is required
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// between successive commands to get reliable operation.
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// If 100ms has elapsed since the last thing sent, then check if there's some output to do.
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if (((int32_t)currentMicros - _commandSendTime) > 100000) {
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if (_currentVolume > _requestedVolumeLevel) {
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// Change volume before changing song if volume is reducing.
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_currentVolume = _requestedVolumeLevel;
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sendPacket(0x06, _currentVolume);
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} else if (_requestedSong > 0) {
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// Change song
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sendPacket(0x03, _requestedSong);
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_requestedSong = -1;
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} else if (_requestedSong == 0) {
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sendPacket(0x16); // Stop playing
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_requestedSong = -1;
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} else if (_currentVolume < _requestedVolumeLevel) {
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// Change volume after changing song if volume is increasing.
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_currentVolume = _requestedVolumeLevel;
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sendPacket(0x06, _currentVolume);
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} else if ((int32_t)currentMicros - _commandSendTime > 1000000) {
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// Poll device every second that other commands aren't being sent,
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// to check if it's still connected and responding.
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sendPacket(0x42);
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if (!_awaitingResponse) {
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_timeoutTime = currentMicros + 5000000UL; // Timeout if no response within 5 seconds
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_awaitingResponse = true;
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}
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}
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}
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}
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// Write with value 1 starts playing a song. The relative pin number is the file number.
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// Write with value 0 stops playing.
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void _write(VPIN vpin, int value) override {
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if (_deviceState == DEVSTATE_FAILED) return;
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int pin = vpin - _firstVpin;
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if (value) {
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// Value 1, start playing
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#ifdef DIAG_IO
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DIAG(F("I2CDFPlayer: Play %d"), pin+1);
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#endif
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_requestedSong = pin+1;
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_playing = true;
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} else {
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// Value 0, stop playing
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#ifdef DIAG_IO
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DIAG(F("I2CDFPlayer: Stop"));
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#endif
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_requestedSong = 0; // No song
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_playing = false;
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}
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}
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// WriteAnalogue on first pin uses the nominated value as a file number to start playing, if file number > 0.
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// Volume may be specified as second parameter to writeAnalogue.
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// If value is zero, the player stops playing.
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// WriteAnalogue on second pin sets the output volume.
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//
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void _writeAnalogue(VPIN vpin, int value, uint8_t volume=0, uint16_t=0) override {
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if (_deviceState == DEVSTATE_FAILED) return;
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uint8_t pin = vpin - _firstVpin;
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#ifdef DIAG_IO
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DIAG(F("I2CDFPlayer: VPIN:%u FileNo:%d Volume:%d"), vpin, value, volume);
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#endif
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// Validate parameter.
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if (volume > MAXVOLUME) volume = MAXVOLUME;
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if (pin == 0) {
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// Play track
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if (value > 0) {
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if (volume > 0)
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_requestedVolumeLevel = volume;
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_requestedSong = value;
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_playing = true;
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} else {
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_requestedSong = 0; // stop playing
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_playing = false;
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}
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} else if (pin == 1) {
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// Set volume (0-30)
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_requestedVolumeLevel = value;
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}
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}
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// A read on any pin indicates whether the player is still playing.
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int _read(VPIN) override {
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if (_deviceState == DEVSTATE_FAILED) return false;
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return _playing;
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}
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void _display() override {
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DIAG(F("I2CDFPlayer Configured on Vpins:%u-%u %S"), _firstVpin, _firstVpin+_nPins-1,
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(_deviceState==DEVSTATE_FAILED) ? F("OFFLINE") : F(""));
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}
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private:
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// 7E FF 06 0F 00 01 01 xx xx EF
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// 0 -> 7E is start code
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// 1 -> FF is version
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// 2 -> 06 is length
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// 3 -> 0F is command
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// 4 -> 00 is no receive
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// 5~6 -> 01 01 is argument
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// 7~8 -> checksum = 0 - ( FF+06+0F+00+01+01 )
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// 9 -> EF is end code
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void sendPacket(uint8_t command, uint16_t arg = 0)
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{
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FIFO_TX_LEVEL = 0; // Reset FIFO_TX_LEVEL
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uint8_t out[] = {
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0x7E,
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0xFF,
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06,
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command,
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00,
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static_cast<uint8_t>(arg >> 8),
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static_cast<uint8_t>(arg & 0x00ff),
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00,
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00,
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0xEF };
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setChecksum(out);
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// Prepend the DFPlayer command with REG address and UART Channel in _outbuffer
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_outbuffer[0] = REG_THR << 3 | _UART_CH << 1; //TX FIFO and UART Channel
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for ( int i = 1; i < sizeof(out)+1 ; i++){
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_outbuffer[i] = out[i-1];
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}
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#ifdef DIAG_I2CDFplayer_data
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DIAG(F("SC16IS752: I2C: %s Sent packet function"), _I2CAddress.toString());
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for (int i = 0; i < sizeof _outbuffer; i++){
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DIAG(F("SC16IS752: Data _outbuffer[0x%x]: 0x%x"), i, _outbuffer[i]);
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}
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#endif
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TX_fifo_lvl();
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if(FIFO_TX_LEVEL > 0){ //FIFO is empty
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//I2CManager.write(_I2CAddress, _outbuffer, sizeof(_outbuffer), &_rb);
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I2CManager.write(_I2CAddress, _outbuffer, sizeof(_outbuffer));
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#ifdef DIAG_I2CDFplayer
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DIAG(F("SC16IS752: I2C: %s data transmit complete on UART: 0x%x"), _I2CAddress.toString(), _UART_CH);
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#endif
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} else {
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DIAG(F("I2CDFPlayer at: %s, TX FIFO not empty on UART: 0x%x"), _I2CAddress.toString(), _UART_CH);
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_deviceState = DEVSTATE_FAILED; // This should not happen
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}
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_commandSendTime = micros();
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}
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uint16_t calcChecksum(uint8_t* packet)
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{
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uint16_t sum = 0;
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for (int i = 1; i < 7; i++)
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{
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sum += packet[i];
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}
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return -sum;
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}
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void setChecksum(uint8_t* out)
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{
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uint16_t sum = calcChecksum(out);
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out[7] = (sum >> 8);
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out[8] = (sum & 0xff);
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}
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// SC16IS752 functions
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// Initialise SC16IS752 only for this channel
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// First a software reset
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// Enable FIFO and clear TX & RX FIFO
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// Need to set the following registers
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// LCR bit 7=0 divisor latch (clock division registers DLH & DLL, they store 16 bit divisor),
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// WORD_LEN, STOP_BIT, PARITY_ENA and PARITY_TYPE
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// MCR bit 7=0 clock divisor devide-by-1 clock input
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// DLH most significant part of divisor
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// DLL least significant part of divisor
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//
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// BAUD_RATE, WORD_LEN, STOP_BIT, PARITY_ENA and PARITY_TYPE have been defined and initialized
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//
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void Init_SC16IS752(){ // Return value is in _deviceState
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#ifdef DIAG_I2CDFplayer
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DIAG(F("SC16IS752: Initialize I2C: %s , UART Ch: 0x%x"), _I2CAddress.toString(), _UART_CH);
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#endif
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uint16_t _divisor = (SC16IS752_XTAL_FREQ / PRESCALER) / (BAUD_RATE * 16);
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TEMP_REG_VAL = 0x08; // UART Software reset
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UART_WriteRegister(REG_IOCONTROL, TEMP_REG_VAL);
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TEMP_REG_VAL = 0x07; // Reset FIFO, clear RX & TX FIFO
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UART_WriteRegister(REG_FCR, TEMP_REG_VAL);
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TEMP_REG_VAL = 0x00; // Set MCR to all 0, includes Clock divisor
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UART_WriteRegister(REG_MCR, TEMP_REG_VAL);
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TEMP_REG_VAL = 0x80 | WORD_LEN | STOP_BIT | PARITY_ENA | PARITY_TYPE;
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UART_WriteRegister(REG_LCR, TEMP_REG_VAL); // Divisor latch enabled
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UART_WriteRegister(REG_DLL, (uint8_t)_divisor); // Write DLL
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UART_WriteRegister(REG_DLH, (uint8_t)(_divisor >> 8)); // Write DLH
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UART_ReadRegister(REG_LCR);
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TEMP_REG_VAL = _inbuffer[0] & 0x7F; // Disable Divisor latch enabled bit
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UART_WriteRegister(REG_LCR, TEMP_REG_VAL); // Divisor latch disabled
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uint8_t status = _rb.wait();
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if (status != I2C_STATUS_OK) {
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DIAG(F("SC16IS752: I2C: %s failed %S"), _I2CAddress.toString(), I2CManager.getErrorMessage(status));
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_deviceState = DEVSTATE_FAILED;
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} else {
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#ifdef DIAG_IO
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DIAG(F("SC16IS752: I2C: %s, _deviceState == I2C_STATUS_OK"), _I2CAddress.toString());
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#endif
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_deviceState = DEVSTATE_NORMAL; // If I2C state is OK, then proceed to initialize DFPlayer
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}
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}
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// Read the Receive FIFO Level register (RXLVL), return a single unsigned integer
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// of nr of characters in the RX FIFO, bit 6:0, 7 not used, set to zero
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// value from 0 (0x00) to 64 (0x40) Only display if RX FIFO has data
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void RX_fifo_lvl(){
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UART_ReadRegister(REG_RXLV);
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FIFO_RX_LEVEL = _inbuffer[0];
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#ifdef DIAG_I2CDFplayer
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if (FIFO_RX_LEVEL > 0){
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DIAG(F("SC16IS752: At I2C: %s, UART channel: 0x%x, RX FIFO Level: 0d%d"), _I2CAddress.toString(), _UART_CH, _inbuffer[0]);
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}
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#endif
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}
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// Read the Tranmit FIFO Level register (TXLVL), return a single unsigned integer
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// of nr characters free in the TX FIFO, bit 6:0, 7 not used, set to zero
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// value from 0 (0x00) to 64 (0x40)
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//
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void TX_fifo_lvl(){
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UART_ReadRegister(REG_TXLV);
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FIFO_TX_LEVEL = _inbuffer[0];
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#ifdef DIAG_I2CDFplayer
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DIAG(F("SC16IS752: At I2C: %s, UART channel: 0x%x, TX FIFO Level: 0d%d"), _I2CAddress.toString(), _UART_CH, FIFO_TX_LEVEL);
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#endif
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}
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// Read from RX FIFO, we know the register REG_RHR
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void ReceiveI2CData(){
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//_inbuffer[0] = 0x00;
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_outbuffer[0] = REG_RHR << 3 | _UART_CH << 1;
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//I2CManager.read(_I2CAddress, _inbuffer, FIFO_RX_LEVEL, _outbuffer, 1, &_rb); // inbuffer[] has the data now
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I2CManager.read(_I2CAddress, _inbuffer, FIFO_RX_LEVEL, _outbuffer, 1); // _inbuffer[] has the data now
|
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#ifdef DIAG_I2CDFplayer_data
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DIAG(F("SC16IS752: At I2C: %s, UART channel: 0x%x, RX FIFO Data"), _I2CAddress.toString(), _UART_CH);
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for (int i = 0; i < sizeof _inbuffer; i++){
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DIAG(F("SC16IS752: Data _inbuffer[0x%x]: 0x%x"), i, _inbuffer[i]);
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}
|
|
#endif
|
|
}
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|
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|
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//void UART_WriteRegister(I2CAddress _I2CAddress, uint8_t _UART_CH, uint8_t UART_REG, uint8_t Val, I2CRB &_rb){
|
|
void UART_WriteRegister(uint8_t UART_REG, uint8_t Val){
|
|
_outbuffer[0] = UART_REG << 3 | _UART_CH << 1;
|
|
_outbuffer[1] = Val;
|
|
#ifdef DIAG_I2CDFplayer_reg
|
|
DIAG(F("SC16IS752: Write register at I2C: %s, UART channel: 0x%x, Register: 0x%x, Data: 0b%b"), _I2CAddress.toString(), _UART_CH, UART_REG, _outbuffer[1]);
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|
#endif
|
|
I2CManager.write(_I2CAddress, _outbuffer, 2);
|
|
}
|
|
|
|
|
|
void UART_ReadRegister(uint8_t UART_REG){
|
|
_outbuffer[0] = UART_REG << 3 | _UART_CH << 1; // _outbuffer[0] has now UART_REG and UART_CH
|
|
I2CManager.read(_I2CAddress, _inbuffer, 1, _outbuffer, 1);
|
|
// _inbuffer has the REG data
|
|
#ifdef DIAG_I2CDFplayer_reg
|
|
DIAG(F("SC16IS752: Read register at I2C: %s, UART channel: 0x%x, Register: 0x%x, Data: 0b%b"), _I2CAddress.toString(), _UART_CH, UART_REG, _inbuffer[0]);
|
|
#endif
|
|
}
|
|
|
|
// SC16IS752 General register set (from the datasheet)
|
|
enum : uint8_t{
|
|
REG_RHR = 0x00, // FIFO Read
|
|
REG_THR = 0x00, // FIFO Write
|
|
REG_IER = 0x01, // Interrupt Enable Register R/W
|
|
REG_FCR = 0x02, // FIFO Control Register Write
|
|
REG_IIR = 0x02, // Interrupt Identification Register Read
|
|
REG_LCR = 0x03, // Line Control Register R/W
|
|
REG_MCR = 0x04, // Modem Control Register R/W
|
|
REG_LSR = 0x05, // Line Status Register Read
|
|
REG_MSR = 0x06, // Modem Status Register Read
|
|
REG_SPR = 0x07, // Scratchpad Register R/W
|
|
REG_TCR = 0x06, // Transmission Control Register R/W
|
|
REG_TLR = 0x07, // Trigger Level Register R/W
|
|
REG_TXLV = 0x08, // Transmitter FIFO Level register Read
|
|
REG_RXLV = 0x09, // Receiver FIFO Level register Read
|
|
REG_IODIR = 0x0A, // Programmable I/O pins Direction register R/W
|
|
REG_IOSTATE = 0x0B, // Programmable I/O pins State register R/W
|
|
REG_IOINTENA = 0x0C, // I/O Interrupt Enable register R/W
|
|
REG_IOCONTROL = 0x0E, // I/O Control register R/W
|
|
REG_EFCR = 0x0F, // Extra Features Control Register R/W
|
|
};
|
|
|
|
// SC16IS752 Special register set
|
|
enum : uint8_t{
|
|
REG_DLL = 0x00, // Division registers R/W
|
|
REG_DLH = 0x01, // Division registers R/W
|
|
};
|
|
|
|
// SC16IS752 Enhanced regiter set
|
|
enum : uint8_t{
|
|
REG_EFR = 0X02, // Enhanced Features Register R/W
|
|
REG_XON1 = 0x04, // R/W
|
|
REG_XON2 = 0x05, // R/W
|
|
REG_XOFF1 = 0x06, // R/W
|
|
REG_XOFF2 = 0x07, // R/W
|
|
};
|
|
|
|
};
|
|
|
|
#endif // IO_I2CDFPlayer_h
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