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https://github.com/DCC-EX/CommandStation-EX.git
synced 2024-12-24 13:21:23 +01:00
Refactored, analogue tested
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57292c2250
commit
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@ -54,22 +54,18 @@
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*/
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*/
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class EXIOExpander : public IODevice {
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class EXIOExpander : public IODevice {
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public:
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public:
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static void create(VPIN vpin, int nPins, uint8_t i2cAddress, int numDigitalPins, int numAnaloguePins) {
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static void create(VPIN vpin, int nPins, uint8_t i2cAddress) {
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if (checkNoOverlap(vpin, nPins, i2cAddress)) new EXIOExpander(vpin, nPins, i2cAddress, numDigitalPins, numAnaloguePins);
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if (checkNoOverlap(vpin, nPins, i2cAddress)) new EXIOExpander(vpin, nPins, i2cAddress);
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}
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}
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private:
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private:
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// Constructor
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// Constructor
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EXIOExpander(VPIN firstVpin, int nPins, uint8_t i2cAddress, int numDigitalPins, int numAnaloguePins) {
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EXIOExpander(VPIN firstVpin, int nPins, uint8_t i2cAddress) {
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_firstVpin = firstVpin;
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_firstVpin = firstVpin;
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_nPins = nPins;
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_nPins = nPins;
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_i2cAddress = i2cAddress;
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_i2cAddress = i2cAddress;
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_numDigitalPins = numDigitalPins;
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_digitalPinBytes = (nPins+7)/8;
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_numAnaloguePins = numAnaloguePins;
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_digitalPinBytes = (numDigitalPins+7)/8;
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_analoguePinBytes = numAnaloguePins * 2;
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_digitalInputStates=(byte*) calloc(_digitalPinBytes,1);
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_digitalInputStates=(byte*) calloc(_digitalPinBytes,1);
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_analogueInputStates=(byte*) calloc(_analoguePinBytes,1);
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addDevice(this);
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addDevice(this);
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}
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}
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@ -77,20 +73,26 @@ private:
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// Initialise EX-IOExander device
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// Initialise EX-IOExander device
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I2CManager.begin();
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I2CManager.begin();
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if (I2CManager.exists(_i2cAddress)) {
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if (I2CManager.exists(_i2cAddress)) {
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_digitalOutBuffer[0] = EXIOINIT;
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_command2Buffer[0] = EXIOINIT;
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_digitalOutBuffer[1] = _numDigitalPins;
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_command2Buffer[1] = _nPins;
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_digitalOutBuffer[2] = _numAnaloguePins;
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// Send config, if EXIOINITA returned, we're good, setup analogue input buffer, otherwise go offline
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// Send config, if EXIORDY returned, we're good, otherwise go offline
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I2CManager.read(_i2cAddress, _receive2Buffer, 2, _command2Buffer, 2);
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I2CManager.read(_i2cAddress, _commandBuffer, 1, _digitalOutBuffer, 3);
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if (_receive2Buffer[0] == EXIOINITA) {
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if (_commandBuffer[0] != EXIORDY) {
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_numAnaloguePins = _receive2Buffer[1];
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_analoguePinBytes = _numAnaloguePins * 2;
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_analogueInputStates = (byte*) calloc(_analoguePinBytes, 1);
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_analoguePinMap = (uint8_t*) calloc(_numAnaloguePins, 1);
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} else {
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DIAG(F("ERROR configuring EX-IOExpander device, I2C:x%x"), _i2cAddress);
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DIAG(F("ERROR configuring EX-IOExpander device, I2C:x%x"), _i2cAddress);
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_deviceState = DEVSTATE_FAILED;
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_deviceState = DEVSTATE_FAILED;
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return;
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return;
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}
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}
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// We now need to retrieve the analogue pin map
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_command1Buffer[0] = EXIOINITA;
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I2CManager.read(_i2cAddress, _analoguePinMap, _numAnaloguePins, _command1Buffer, 1);
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// Attempt to get version, if we don't get it, we don't care, don't go offline
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// Attempt to get version, if we don't get it, we don't care, don't go offline
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// Using digital in buffer in reverse to save RAM
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_command1Buffer[0] = EXIOVER;
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_commandBuffer[0] = EXIOVER;
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I2CManager.read(_i2cAddress, _versionBuffer, 3, _command1Buffer, 1);
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I2CManager.read(_i2cAddress, _versionBuffer, 3, _commandBuffer, 1);
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_majorVer = _versionBuffer[0];
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_majorVer = _versionBuffer[0];
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_minorVer = _versionBuffer[1];
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_minorVer = _versionBuffer[1];
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_patchVer = _versionBuffer[2];
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_patchVer = _versionBuffer[2];
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@ -105,13 +107,10 @@ private:
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}
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}
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}
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}
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// Digital input pin configuration, used to enable on EX-IOExpander device and set pullups if in use
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bool _configure(VPIN vpin, ConfigTypeEnum configType, int paramCount, int params[]) override {
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bool _configure(VPIN vpin, ConfigTypeEnum configType, int paramCount, int params[]) override {
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if (configType != CONFIGURE_INPUT) return false;
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if (configType != CONFIGURE_INPUT) return false;
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if (paramCount != 1) return false;
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if (paramCount != 1) return false;
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if (vpin >= _firstVpin + _numDigitalPins) {
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DIAG(F("EX-IOExpander ERROR: Vpin %d is an analogue pin, cannot use as a digital pin"), vpin);
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return false;
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}
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bool pullup = params[0];
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bool pullup = params[0];
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int pin = vpin - _firstVpin;
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int pin = vpin - _firstVpin;
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_digitalOutBuffer[0] = EXIODPUP;
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_digitalOutBuffer[0] = EXIODPUP;
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@ -121,37 +120,39 @@ private:
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return true;
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return true;
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}
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}
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// We only use this to detect incorrect use of analogue pins
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// Analogue input pin configuration, used to enable on EX-IOExpander device
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int _configureAnalogIn(VPIN vpin) override {
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int _configureAnalogIn(VPIN vpin) override {
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if (vpin < _firstVpin + _numDigitalPins) {
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DIAG(F("EX-IOExpander ERROR: Vpin %d is a digital pin, cannot use as an analogue pin"), vpin);
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return false;
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}
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int pin = vpin - _firstVpin;
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int pin = vpin - _firstVpin;
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_analogueOutBuffer[0] = EXIOENAN;
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_command2Buffer[0] = EXIOENAN;
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_analogueOutBuffer[1] = pin;
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_command2Buffer[1] = pin;
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I2CManager.write(_i2cAddress, _analogueOutBuffer, 2);
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I2CManager.write(_i2cAddress, _command2Buffer, 2);
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return true;
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return true;
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}
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}
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// Main loop, collect both digital and analogue pin states continuously (faster sensor/input reads)
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void _loop(unsigned long currentMicros) override {
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void _loop(unsigned long currentMicros) override {
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(void)currentMicros; // remove warning
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(void)currentMicros; // remove warning
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_commandBuffer[0] = EXIORDD;
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_command1Buffer[0] = EXIORDD;
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I2CManager.read(_i2cAddress, _digitalInputStates, _digitalPinBytes, _commandBuffer, 1);
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I2CManager.read(_i2cAddress, _digitalInputStates, _digitalPinBytes, _command1Buffer, 1);
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_commandBuffer[0] = EXIORDAN;
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_command1Buffer[0] = EXIORDAN;
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I2CManager.read(_i2cAddress, _analogueInputStates, _analoguePinBytes, _commandBuffer, 1);
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I2CManager.read(_i2cAddress, _analogueInputStates, _analoguePinBytes, _command1Buffer, 1);
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}
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}
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// Obtain the correct analogue input value
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int _readAnalogue(VPIN vpin) override {
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int _readAnalogue(VPIN vpin) override {
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if (vpin < _firstVpin + _numDigitalPins) return false;
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int pin = vpin - _firstVpin;
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int pin = vpin - _firstVpin - _numDigitalPins;
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uint8_t _pinLSBByte;
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uint8_t _pinLSBByte = pin * 2;
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for (uint8_t aPin = 0; aPin < _numAnaloguePins; aPin++) {
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if (_analoguePinMap[aPin] == pin) {
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_pinLSBByte = aPin * 2;
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}
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}
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uint8_t _pinMSBByte = _pinLSBByte + 1;
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uint8_t _pinMSBByte = _pinLSBByte + 1;
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return (_analogueInputStates[_pinMSBByte] << 8) + _analogueInputStates[_pinLSBByte];
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return (_analogueInputStates[_pinMSBByte] << 8) + _analogueInputStates[_pinLSBByte];
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}
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}
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// Obtain the correct digital input value
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int _read(VPIN vpin) override {
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int _read(VPIN vpin) override {
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if (vpin >= _firstVpin + _numDigitalPins) return false;
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int pin = vpin - _firstVpin;
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int pin = vpin - _firstVpin;
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uint8_t pinByte = pin / 8;
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uint8_t pinByte = pin / 8;
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bool value = _digitalInputStates[pinByte] >> (pin - pinByte * 8);
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bool value = _digitalInputStates[pinByte] >> (pin - pinByte * 8);
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@ -159,7 +160,6 @@ private:
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}
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}
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void _write(VPIN vpin, int value) override {
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void _write(VPIN vpin, int value) override {
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if (vpin >= _firstVpin + _numDigitalPins) return;
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int pin = vpin - _firstVpin;
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int pin = vpin - _firstVpin;
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_digitalOutBuffer[0] = EXIOWRD;
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_digitalOutBuffer[0] = EXIOWRD;
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_digitalOutBuffer[1] = pin;
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_digitalOutBuffer[1] = pin;
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@ -168,25 +168,14 @@ private:
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}
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}
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void _display() override {
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void _display() override {
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int _firstAnalogue, _lastAnalogue;
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DIAG(F("EX-IOExpander I2C:x%x v%d.%d.%d Vpins %d-%d %S"),
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if (_numAnaloguePins == 0) {
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_firstAnalogue = 0;
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_lastAnalogue = 0;
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} else {
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_firstAnalogue = _firstVpin + _numDigitalPins;
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_lastAnalogue = _firstVpin + _nPins - 1;
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}
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DIAG(F("EX-IOExpander I2C:x%x v%d.%d.%d: %d Digital Vpins %d-%d, %d Analogue Vpins %d-%d %S"),
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_i2cAddress, _majorVer, _minorVer, _patchVer,
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_i2cAddress, _majorVer, _minorVer, _patchVer,
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_numDigitalPins, _firstVpin, _firstVpin + _numDigitalPins - 1,
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(int)_firstVpin, (int)_firstVpin+_nPins-1,
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_numAnaloguePins, _firstAnalogue, _lastAnalogue,
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_deviceState == DEVSTATE_FAILED ? F("OFFLINE") : F(""));
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_deviceState == DEVSTATE_FAILED ? F("OFFLINE") : F(""));
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}
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}
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uint8_t _i2cAddress;
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uint8_t _i2cAddress;
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uint8_t _numDigitalPins;
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uint8_t _numAnaloguePins;
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uint8_t _numAnaloguePins;
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byte _analogueOutBuffer[2];
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byte _digitalOutBuffer[3];
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byte _digitalOutBuffer[3];
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uint8_t _versionBuffer[3];
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uint8_t _versionBuffer[3];
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uint8_t _majorVer = 0;
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uint8_t _majorVer = 0;
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@ -196,7 +185,10 @@ private:
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byte* _analogueInputStates;
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byte* _analogueInputStates;
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uint8_t _digitalPinBytes = 0;
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uint8_t _digitalPinBytes = 0;
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uint8_t _analoguePinBytes = 0;
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uint8_t _analoguePinBytes = 0;
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byte _commandBuffer[1];
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byte _command1Buffer[1];
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byte _command2Buffer[2];
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byte _receive2Buffer[2];
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uint8_t* _analoguePinMap;
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enum {
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enum {
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EXIOINIT = 0xE0, // Flag to initialise setup procedure
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EXIOINIT = 0xE0, // Flag to initialise setup procedure
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@ -207,6 +199,7 @@ private:
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EXIOWRD = 0xE5, // Flag for digital write
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EXIOWRD = 0xE5, // Flag for digital write
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EXIORDD = 0xE6, // Flag to read digital input
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EXIORDD = 0xE6, // Flag to read digital input
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EXIOENAN = 0xE7, // Flag eo enable an analogue pin
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EXIOENAN = 0xE7, // Flag eo enable an analogue pin
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EXIOINITA = 0xE8, // Flag we're receiving analogue pin info
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};
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};
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};
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};
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