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Working on analogue inputs

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This commit is contained in:
peteGSX 2023-01-23 16:26:07 +10:00
parent 7f4e3d9cea
commit 878549d538
1 changed files with 32 additions and 18 deletions
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50
IO_EXIOExpander.h
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@ -66,8 +66,10 @@ private:
_i2cAddress = i2cAddress;
_numDigitalPins = numDigitalPins;
_numAnaloguePins = numAnaloguePins;
_digitalBytes = (numDigitalPins+7)/8;
_digitalPinStates=(byte*) calloc(_digitalBytes,1);
_digitalPinBytes = (numDigitalPins+7)/8;
_analoguePinBytes = (numAnaloguePins+7)/8;
_digitalInputStates=(byte*) calloc(_digitalPinBytes,1);
_analogueInputStates=(byte*) calloc(_analoguePinBytes,2);
addDevice(this);
}
@ -79,16 +81,16 @@ private:
_digitalOutBuffer[1] = _numDigitalPins;
_digitalOutBuffer[2] = _numAnaloguePins;
// Send config, if EXIORDY returned, we're good, otherwise go offline
I2CManager.read(_i2cAddress, _digitalInBuffer, 1, _digitalOutBuffer, 3);
if (_digitalInBuffer[0] != EXIORDY) {
I2CManager.read(_i2cAddress, _commandBuffer, 1, _digitalOutBuffer, 3);
if (_commandBuffer[0] != EXIORDY) {
DIAG(F("ERROR configuring EX-IOExpander device, I2C:x%x"), _i2cAddress);
_deviceState = DEVSTATE_FAILED;
return;
}
// Attempt to get version, if we don't get it, we don't care, don't go offline
// Using digital in buffer in reverse to save RAM
_digitalInBuffer[0] = EXIOVER;
I2CManager.read(_i2cAddress, _versionBuffer, 3, _digitalInBuffer, 1);
_commandBuffer[0] = EXIOVER;
I2CManager.read(_i2cAddress, _versionBuffer, 3, _commandBuffer, 1);
_majorVer = _versionBuffer[0];
_minorVer = _versionBuffer[1];
_patchVer = _versionBuffer[2];
@ -123,29 +125,41 @@ private:
int _configureAnalogIn(VPIN vpin) override {
if (vpin < _firstVpin + _numDigitalPins) {
DIAG(F("EX-IOExpander ERROR: Vpin %d is a digital pin, cannot use as an analogue pin"), vpin);
return false;
}
return false;
int pin = vpin - _firstVpin;
_analogueOutBuffer[0] = EXIOENAN;
_analogueOutBuffer[1] = pin;
DIAG(F("Enable Vpin %d/pin %d"), vpin, pin);
I2CManager.write(_i2cAddress, _analogueOutBuffer, 2);
return true;
}
void _loop(unsigned long currentMicros) override {
_commandBuffer[0] = EXIORDD;
I2CManager.read(_i2cAddress, _digitalPinStates, _digitalBytes, _commandBuffer, 1);
I2CManager.read(_i2cAddress, _digitalInputStates, _digitalPinBytes, _commandBuffer, 1);
_commandBuffer[0] = EXIORDAN;
I2CManager.read(_i2cAddress, _analogueInputStates, _analoguePinBytes, _commandBuffer, 1);
delayUntil(currentMicros + 500000);
}
int _readAnalogue(VPIN vpin) override {
if (vpin < _firstVpin + _numDigitalPins) return false;
int pin = vpin - _firstVpin;
_analogueOutBuffer[0] = EXIORDAN;
_analogueOutBuffer[1] = pin;
I2CManager.read(_i2cAddress, _analogueInBuffer, 2, _analogueOutBuffer, 2);
return (_analogueInBuffer[1] << 8) + _analogueInBuffer[0];
// _analogueOutBuffer[0] = EXIORDAN;
// _analogueOutBuffer[1] = pin;
// I2CManager.read(_i2cAddress, _analogueInBuffer, 2, _analogueOutBuffer, 2);
// return (_analogueInBuffer[1] << 8) + _analogueInBuffer[0];
uint8_t _pinLSBByte = (pin / 4) * 2;
uint8_t _pinMSBByte = _pinLSBByte + 1;
return (_pinMSBByte << 8) + _pinLSBByte;
}
int _read(VPIN vpin) override {
if (vpin >= _firstVpin + _numDigitalPins) return false;
int pin = vpin - _firstVpin;
uint8_t pinByte = pin / 8;
bool value = _digitalPinStates[pinByte] >> (pin - pinByte * 8);
bool value = _digitalInputStates[pinByte] >> (pin - pinByte * 8);
return value;
}
@ -177,18 +191,17 @@ private:
uint8_t _i2cAddress;
uint8_t _numDigitalPins;
uint8_t _numAnaloguePins;
int _digitalPinBytes;
int _analoguePinBytes;
byte _analogueInBuffer[2];
byte _analogueOutBuffer[2];
byte _digitalOutBuffer[3];
byte _digitalInBuffer[1];
uint8_t _versionBuffer[3];
uint8_t _majorVer = 0;
uint8_t _minorVer = 0;
uint8_t _patchVer = 0;
byte* _digitalPinStates;
uint8_t _digitalBytes = 0;
byte* _digitalInputStates;
byte* _analogueInputStates;
uint8_t _digitalPinBytes = 0;
uint8_t _analoguePinBytes = 0;
byte _commandBuffer[1];
enum {
@ -199,6 +212,7 @@ private:
EXIORDAN = 0xE4, // Flag to read an analogue input
EXIOWRD = 0xE5, // Flag for digital write
EXIORDD = 0xE6, // Flag to read digital input
EXIOENAN = 0xE7, // Flag eo enable an analogue pin
};
};