void TWITransmitData(void *const TXdata, uint8_t dataLen, uint8_t repStart, uint8_t blocking)
{
// Wait until ready
while (!isTWIReady()) {_delay_us(1);}
// Reset the I2C stuff
TWCR = (1 << TWINT)|(1 << TWSTO);
TWIInit();
// Set repeated start mode
TWIInfo.repStart = repStart;
// Copy transmit info to global variables
TWITransmitBuffer = (uint8_t *)TXdata;
TXBuffLen = dataLen;
TXBuffIndex = 0;
// If a repeated start has been sent, then devices are already listening for an address
// and another start does not need to be sent.
if (TWIInfo.mode == RepeatedStartSent)
{
TWIInfo.mode = Initializing;
TWDR = TWITransmitBuffer[TXBuffIndex++]; // Load data to transmit buffer
TWISendTransmit(); // Send the data
}
else // Otherwise, just send the normal start signal to begin transmission.
{
TWIInfo.mode = Initializing;
TWISendStart();
}
if(blocking){
// Wait until ready
while (!isTWIReady()){_delay_us(1);}
}
}
void DAC::beginTransmission() volatile
{
TWISendStart();
TWIWaitForInterrupt();
/*if(TWIGetStatusCode() != TWI_START_SC)
uart_puts("No start sc\n\r");*/
TWDR = DAC_ADDRESS_W;
TWIClearInterruptFlag();
TWIWaitForInterrupt();
/*if(TWIGetStatusCode() != TWI_SLAVE_W_ACK_SC)
uart_puts("No address ack\n\r");*/
TWDR = DAC_CONTROL_BYTE;
TWIClearInterruptFlag();
TWIWaitForInterrupt();
/*if(TWIGetStatusCode() != TWI_SLAVE_DATA_ACK_SC)
uart_puts("No control byte ack\n\r");
uart_putint(TWIGetStatusCode());*/
}
uint8_t TWITransmitData(void *const TXdata, uint8_t dataLen, uint8_t repStart)
{
if (dataLen <= TXMAXBUFLEN)
{
// Wait until ready
while (!isTWIReady()) {_delay_us(1);}
// Set repeated start mode
TWIInfo.repStart = repStart;
// Copy data into the transmit buffer
uint8_t *data = (uint8_t *)TXdata;
for (int i = 0; i < dataLen; i++)
{
TWITransmitBuffer[i] = data[i];
}
// Copy transmit info to global variables
TXBuffLen = dataLen;
TXBuffIndex = 0;
// If a repeated start has been sent, then devices are already listening for an address
// and another start does not need to be sent.
if (TWIInfo.mode == RepeatedStartSent)
{
TWIInfo.mode = Initializing;
TWDR = TWITransmitBuffer[TXBuffIndex++]; // Load data to transmit buffer
TWISendTransmit(); // Send the data
}
else // Otherwise, just send the normal start signal to begin transmission.
{
TWIInfo.mode = Initializing;
TWISendStart();
}
}
else
{
return 1; // return an error if data length is longer than buffer
}
return 0;
}
