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Add comments, remove unnecessary functions

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This commit is contained in:
peteGSX 2022-12-15 15:10:53 +10:00
parent 070daa37dc
commit a480a5a3d2
1 changed files with 16 additions and 39 deletions
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55
IO_EXIOExpander.h
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@ -28,8 +28,16 @@
*
* void halSetup() {
* // EXIOExpander::create(vpin, num_vpins, i2c_address, digitalPinCount, analoguePinCount);
* EXIOExpander::create(800, 18, 0x90, 12, 6);
}
* EXIOExpander::create(800, 18, 0x65, EXIO_NANO_DIGITAL_PINS, EXIO_NANO_ANALOGUE_PINS);
* }
*
* Note when defining the number of digital and analogue pins, there is no way to sanity check
* this from the device driver, and it is up to the user to define the correct values here.
*
* Vpins are allocated to digital pins first, and then analogue pins, so digital pins will
* populate the first part of the specified vpin range, with the analogue pins populating the
* last part of the vpin range.
* Eg. for a default Nano, 800 - 811 are digital (D2 - D13), 812 to 817 are analogue (A0 - A3, A6/A7).
*/
#ifndef IO_EX_IOEXPANDER_H
@ -74,9 +82,8 @@ private:
void _begin() {
// Initialise EX-IOExander device
uint8_t _check = I2CManager.checkAddress(_i2cAddress);
DIAG(F("I2C status check: %d"), _check);
if (I2CManager.exists(_i2cAddress)) {
_activity = EXIOINIT;
_activity = EXIOINIT; // First thing to do is configure EX-IOExpander device
#ifdef DIAG_IO
_display();
#endif
@ -87,43 +94,15 @@ private:
}
void _loop(unsigned long currentMicros) override {
if (_i2crb.status == I2C_STATUS_PENDING) return;
if (_i2crb.status == I2C_STATUS_PENDING) return; // Do nothing if I2C isn't ready yet
if (_i2crb.status == I2C_STATUS_OK) {
switch(_activity) {
case EXIOINIT:
// Send digital and analogue pin counts
// Send digital and analogue pin counts to configure EX-IOExpander
_setupBuffer[0] = EXIOINIT;
_setupBuffer[1] = _numDigitalPins;
_setupBuffer[2] = _numAnaloguePins;
I2CManager.write(_i2cAddress, _setupBuffer, 3, &_i2crb);
_activity = EXIODPIN;
break;
case EXIODPIN:
// Enable digital ports
_digitalPinBytes = (_numDigitalPins + 7) / 8 + 1;
_digitalOutBuffer[0] = EXIODPIN;
for (uint8_t byte = 1; byte < _digitalPinBytes; byte++) {
_digitalOutBuffer[byte] = 0;
}
for (uint8_t pin = 0; pin < _numDigitalPins; pin++) {
int pinByte = pin / 8;
bitSet(_digitalOutBuffer[pinByte + 1], pin - pinByte * 8);
}
I2CManager.write(_i2cAddress, _digitalOutBuffer, _digitalPinBytes, &_i2crb);
_activity = EXIOAPIN;
break;
case EXIOAPIN:
// Enable analogue ports
_analoguePinBytes = (_numAnaloguePins + 7) / 8 + 1;
_analogueOutBuffer[0] = EXIOAPIN;
for (uint8_t byte = 1; byte < _analoguePinBytes; byte++) {
_analogueOutBuffer[byte] = 0;
}
for (uint8_t pin = 0; pin < _numAnaloguePins; pin++) {
int pinByte = pin / 8;
bitSet(_analogueOutBuffer[pinByte + 1], pin - pinByte * 8);
}
I2CManager.write(_i2cAddress, _analogueOutBuffer, _analoguePinBytes, &_i2crb);
_activity = EXIORDY;
break;
default:
@ -152,11 +131,9 @@ private:
enum {
EXIOINIT = 0xE0, // Flag to initialise setup procedure
EXIODPIN = 0xE1, // Flag we're sending digital pin assignments
EXIOAPIN = 0xE2, // Flag we're sending analogue pin assignments
EXIORDY = 0xE3, // Flag we have completed setup procedure, also for EX-IO to ACK setup
EXIODDIR = 0xE4, // Flag we're sending digital pin direction configuration
EXIODPUP = 0xE5, // Flag we're sending digital pin pullup configuration
EXIORDY = 0xE1, // Flag we have completed setup procedure, also for EX-IO to ACK setup
EXIODDIR = 0xE2, // Flag we're sending digital pin direction configuration
EXIODPUP = 0xE3, // Flag we're sending digital pin pullup configuration
};
};