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I2C address checks cleaned up

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This commit is contained in:
Asbelos 2022-06-14 17:35:29 +01:00
parent 08eaa8ddb7
commit 6b7c2ccdf0
3 changed files with 9 additions and 19 deletions
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9
IODevice.cpp
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@ -61,14 +61,11 @@ void IODevice::begin() {
// Allocates 32 pins 100-131
PCA9685::create(100, 16, 0x40);
PCA9685::create(116, 16, 0x41);
PCA9685::create(132, 16, 0x41); // should fail
PCA9685::create(118, 4, 0x42); // should fail
// Predefine two MCP23017 module 0x20/0x21
// Allocates 32 pins 164-195
MCP23017::create(164, 16, 0x20);
MCP23017::create(180, 16, 0x21);
MCP23017::create(196, 16, 0x40); // should fail
// Call the begin() methods of each configured device in turn
for (IODevice *dev=_firstDevice; dev!=NULL; dev = dev->_nextDevice) {
@ -280,7 +277,9 @@ IODevice *IODevice::findDevice(VPIN vpin) {
// Private helper function to check for vpin overlap. Run during setup only.
// returns true if pins DONT overlap with existing device
bool IODevice::checkNoOverlap(VPIN firstPin, uint8_t nPins, uint8_t i2cAddress) {
#ifdef DIAG_IO
DIAG(F("Check no overlap %d %d 0x%x"), firstPin,nPins,i2cAddress);
#endif
VPIN lastPin=firstPin+nPins-1;
for (IODevice *dev = _firstDevice; dev != 0; dev = dev->_nextDevice) {
@ -304,9 +303,7 @@ bool IODevice::checkNoOverlap(VPIN firstPin, uint8_t nPins, uint8_t i2cAddress)
}
bool IODevice::_matchI2CAddress(uint8_t i2cAddress) {
// Overridden for I2c devices.
(void) i2cAddress;
return false;
return (i2cAddress && i2cAddress==_I2CAddress);
}
//==================================================================================================================

11
IODevice.h
View File

@ -168,6 +168,7 @@ protected:
_firstVpin = firstVpin;
_nPins = nPins;
_nextEntryTime = 0;
_I2CAddress=0;
}
// Method to perform initialisation of the device (optionally implemented within device class)
@ -220,7 +221,7 @@ protected:
// Common object fields.
VPIN _firstVpin;
int _nPins;
uint8_t _I2CAddress;
// Flag whether the device supports callbacks.
bool _hasCallback = false;
@ -229,7 +230,7 @@ protected:
int16_t _gpioInterruptPin = -1;
// non-i2c hal drivers return false, i2c drivers override this in IO_GPIOBase
virtual bool _matchI2CAddress(uint8_t i2cAddress);
bool _matchI2CAddress(uint8_t i2cAddress);
// Method to check if pins will overlap before creating new device.
static bool checkNoOverlap(VPIN firstPin, uint8_t nPins=1, uint8_t i2cAddress=0);
@ -245,7 +246,6 @@ private:
bool owns(VPIN vpin);
// Method to find device handling Vpin
static IODevice *findDevice(VPIN vpin);
uint8_t _I2CAddress;
IODevice *_nextDevice = 0;
unsigned long _nextEntryTime;
static IODevice *_firstDevice;
@ -287,10 +287,7 @@ private:
void updatePosition(uint8_t pin);
void writeDevice(uint8_t pin, int value);
void _display() override;
virtual bool _matchI2CAddress(uint8_t i2caddress) override {
return i2caddress && i2caddress==_I2CAddress;
}
uint8_t _I2CAddress; // 0x40-0x43 possible
struct ServoData {
uint16_t activePosition : 12; // Config parameter

6
IO_GPIOBase.h
View File

@ -45,13 +45,9 @@ protected:
int _read(VPIN vpin) override;
void _display() override;
void _loop(unsigned long currentMicros) override;
virtual bool _matchI2CAddress(uint8_t i2cAddress) override {
DIAG(F("MatchI2c %x %x"), i2cAddress, _I2CAddress);
return (i2cAddress && i2cAddress==_I2CAddress);
}
// Data fields
uint8_t _I2CAddress;
// Allocate enough space for all input pins
T _portInputState;
T _portOutputState;