void KEYS::writeByte(uint8_t data, uint8_t reg) {
Wire.beginTransmission(_address);
I2CWRITE((uint8_t) reg);
I2CWRITE((uint8_t) data);
Wire.endTransmission();
return;
}
bool KEYS::read3Bytes(uint32_t *data, uint8_t reg) {
union
{
uint8_t b[4];
uint32_t w;
} datau;
datau.w = *data;
Wire.beginTransmission(_address);
I2CWRITE((uint8_t) reg);
Wire.endTransmission();
uint8_t timeout=0;
Wire.requestFrom(_address, (uint8_t) 0x03);
while(Wire.available() < 3) {
timeout++;
if(timeout > I2CTIMEOUT) {
return(true);
}
delay(1);
} //Experimental
datau.b[0] = I2CREAD();
datau.b[1] = I2CREAD();
datau.b[2] = I2CREAD();
*data = datau.w;
return(false);
}
void I2C_4DI4RO::updateGPIO() {
/* Compute new GPIO states */
uint8_t value = (_PIN & ~_DDR) | _PORT;
/* Start communication and send GPIO values as byte */
Wire.beginTransmission(_address);
I2CWRITE(value);
Wire.endTransmission();
}
void KEYS::write3Bytes(uint32_t data, uint8_t reg) {
union
{
uint8_t b[4];
uint32_t w;
} datau;
datau.w = data;
Wire.beginTransmission(_address);
I2CWRITE((uint8_t) reg);
I2CWRITE((uint8_t) datau.b[0]);
I2CWRITE((uint8_t) datau.b[1]);
I2CWRITE((uint8_t) datau.b[2]);
Wire.endTransmission();
return;
}
void PCF8574::updateGPIO() {
/* Read current GPIO states */
//readGPIO(); // Experimental
/* Compute new GPIO states */
//uint8_t value = ((_PIN & ~_DDR) & ~(~_DDR & _PORT)) | _PORT; // Experimental
uint8_t value = (_PIN & ~_DDR) | _PORT;
/* Start communication and send GPIO values as byte */
Wire.beginTransmission(_address);
I2CWRITE(value);
Wire.endTransmission();
}
bool KEYS::readByte(uint8_t *data, uint8_t reg) {
Wire.beginTransmission(_address);
I2CWRITE((uint8_t) reg);
Wire.endTransmission();
uint8_t timeout=0;
Wire.requestFrom(_address, (uint8_t) 0x01);
while(Wire.available() < 1) {
timeout++;
if(timeout > I2CTIMEOUT) {
return(true);
}
delay(1);
} // Experimental
*data = I2CREAD();
return(false);
}