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First compile neopixel driver
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@ -547,7 +547,9 @@ protected:
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#include "IO_duinoNodes.h"
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#include "IO_EXIOExpander.h"
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#include "IO_trainbrains.h"
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#include "IO_EncoderThrottle.h"#include "IO_TCA8418.h"
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#include "IO_EncoderThrottle.h"
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#include "IO_TCA8418.h"
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#include "IO_NeoPixel.h"
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#endif // iodevice_h
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156
IO_NeoPixel.h
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156
IO_NeoPixel.h
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/*
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* © 2024, Chris Harlow. All rights reserved.
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*
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* This file is part of EX-CommandStation
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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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* The IO_NEOPIXEL.h device driver integrates with one or more Adafruit neopixel drivers.
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* This device driver will configure the device on startup, along with
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* interacting with the device for all input/output duties.
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*
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* To create NEOPIXEL devices, these are defined in myAutomation.h:
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* (Note the device driver is included by default)
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*
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* HAL(NEOPIXEL,first vpin, number of pixels, i2c address)
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* e.g. HAL(NEOPIXEL,1000,64,0x60)
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* This gives each pixel in the chain an individual vpin
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* The number of pixels must match the physical pixels in the chain.
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*
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* This driver maintains a colour (rgb value in 5,5,5 bits only) plus an ON bit.
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* This can be written/read with an analog write/read call.
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* The ON bit can be set on and off with a digital write. This allows for
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* a pixel to be preset a colour and then turned on and off like any other light.
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*/
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#ifndef IO_EX_NeoPixel_H
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#define IO_EX_NeoPixel_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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#include "FSH.h"
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/////////////////////////////////////////////////////////////////////////////////////////////////////
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/*
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* IODevice subclass for NeoPixel.
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*/
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class NeoPixel : public IODevice {
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public:
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static void create(VPIN vpin, int nPins, I2CAddress i2cAddress) {
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if (checkNoOverlap(vpin, nPins, i2cAddress)) new NeoPixel(vpin, nPins, i2cAddress);
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}
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private:
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static const uint16_t NEOPIXEL_ON_FLAG=0x0001;
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// Constructor
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NeoPixel(VPIN firstVpin, int nPins, I2CAddress i2cAddress) {
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_firstVpin = firstVpin;
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_I2CAddress = i2cAddress;
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addDevice(this);
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}
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void _begin() {
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// Initialise Neopixel device
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I2CManager.begin();
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if (!I2CManager.exists(_I2CAddress)) {
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DIAG(F("NeoPixel I2C:%s device not found"), _I2CAddress.toString());
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_deviceState = DEVSTATE_FAILED;
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return;
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}
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// TODO - initialize the neopixel board
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pixelBuffer=(uint16_t *) calloc(_nPins,sizeof(uint16_t)); // all pixels off
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_display();
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}
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// read back pixel colour (rarely needed I suspect)
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int _readAnalogue(VPIN vpin) override {
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if (_deviceState == DEVSTATE_FAILED) return 0;
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auto pin=vpin-_firstVpin;
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return pixelBuffer[pin];
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}
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// read back pixel on/off
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int _read(VPIN vpin) override {
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if (_deviceState == DEVSTATE_FAILED) return 0;
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auto pin=vpin-_firstVpin;
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return pixelBuffer[pin] & NEOPIXEL_ON_FLAG;
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}
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// Write digital value. Sets pixel on or off
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void _write(VPIN vpin, int value) override {
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if (_deviceState == DEVSTATE_FAILED) return;
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auto pin=vpin-_firstVpin;
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if (value) {
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if (pixelBuffer[pin] & NEOPIXEL_ON_FLAG) return;
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pixelBuffer[pin] |= NEOPIXEL_ON_FLAG;
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}
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else { // set off
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if (!(pixelBuffer[pin] & NEOPIXEL_ON_FLAG)) return;
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pixelBuffer[pin] &= (~NEOPIXEL_ON_FLAG);
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}
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transmit(pin);
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}
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// Write analogue (integer) value
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void _writeAnalogue(VPIN vpin, int colour, uint8_t ignore1, uint16_t ignore2) override {
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(void) ignore1;
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(void) ignore2;
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auto newColour=(uint16_t)colour;
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if (_deviceState == DEVSTATE_FAILED) return;
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auto pin=vpin-_firstVpin;
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if (pixelBuffer[pin]==newColour) return;
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pixelBuffer[pin]=newColour;
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transmit(pin);
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}
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// Display device information and status.
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void _display() override {
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DIAG(F("NeoPixel I2C:%s Vpins %u-%u %S"),
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_I2CAddress.toString(),
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(int)_firstVpin, (int)_firstVpin+_nPins-1,
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_deviceState == DEVSTATE_FAILED ? F("OFFLINE") : F(""));
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}
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// Helper function for error handling
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void reportError(uint8_t status, bool fail=true) {
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DIAG(F("NeoPixel I2C:%s Error:%d (%S)"), _I2CAddress.toString(),
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status, I2CManager.getErrorMessage(status));
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if (fail)
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_deviceState = DEVSTATE_FAILED;
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}
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void transmit(uint16_t pin) {
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auto colour=pixelBuffer[pin];
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if (colour & NEOPIXEL_ON_FLAG) {
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// TODO convert 5,5,5 to RGB
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}
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else {
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// TODO set black
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}
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// TODO transmit pixel to driver
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}
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uint16_t* pixelBuffer = nullptr;
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};
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#endif
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@ -71,6 +71,7 @@ private:
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// Set pullups only for in-use pins. This prevents pullup being set for a pin that
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// is intended for use as an output but hasn't been written to yet.
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uint32_t temp = _portPullup & _portInUse;
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(void)temp; // Chris did this so he could see warnings that mattered
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// I2CManager.write(_I2CAddress, 3, REG_GPPUA, temp, temp>>8);
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}
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void _writePortModes() override {
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