dani/CommandStation-EX
1
0
Fork 0
mirror of https://github.com/DCC-EX/CommandStation-EX.git synced 2024-12-24 13:21:23 +01:00
Code Releases Activity

Refactored, analogue tested

Browse Source
This commit is contained in:
peteGSX 2023-01-29 10:06:01 +10:00 committed by peteGSX
parent 57292c2250
commit d8cbdb24e1
1 changed files with 45 additions and 52 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

97
IO_EXIOExpander.h
View File

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