uint8_t TwoWire::endTransmission(uint8_t sendStop)
{
uint8_t error = I2C_MASTER_ERR_NONE;
if(TX_BUFFER_EMPTY) return 0;
//Wait for any previous transaction to complete
while(ROM_I2CMasterBusBusy(MASTER_BASE));
while(ROM_I2CMasterBusy(MASTER_BASE));
//Select which slave we are requesting data from
//false indicates we are writing to the slave
ROM_I2CMasterSlaveAddrSet(MASTER_BASE, txAddress, false);
while(ROM_I2CMasterBusy(MASTER_BASE));
unsigned long cmd = RUN_BIT | START_BIT;
error = sendTxData(cmd,txBuffer[txReadIndex]);
txReadIndex = (txReadIndex + 1) % BUFFER_LENGTH;
if(error) return error;
while(!TX_BUFFER_EMPTY) {
error = sendTxData(RUN_BIT,txBuffer[txReadIndex]);
txReadIndex = (txReadIndex + 1) % BUFFER_LENGTH;
if(error) return getError(error);
}
if(txWriteRomQuantity!=0) // Hey we have Rom Block data to transmit!
{
while(txWriteRomIndex != txWriteRomQuantity)
{
uint8_t c = *PtrTxRomBuffer++;
error = sendTxData(RUN_BIT,c);
txWriteRomIndex++;
if(error) return getError(error);
}
txWriteRomQuantity=0; // Clear to disable further tx
}
if(sendStop) {
while(ROM_I2CMasterBusy(MASTER_BASE));
HWREG(MASTER_BASE + I2C_O_MCS) = STOP_BIT;
while(ROM_I2CMasterBusy(MASTER_BASE));
currentState = IDLE;
}
else {
currentState = MASTER_TX;
}
// indicate that we are done transmitting
transmitting = 0;
return error;
}
uint8_t TwoWire::endTransmission(uint8_t sendStop)
{
uint8_t error = I2C_MASTER_ERR_NONE;
digitalWrite(RED_LED, HIGH);
if(TX_BUFFER_EMPTY) return 0;
//Wait for any previous transaction to complete
while(ROM_I2CMasterBusBusy(MASTER_BASE)); // Here it hangs sometimes!
digitalWrite(RED_LED, LOW);
while(ROM_I2CMasterBusy(MASTER_BASE));
//Select which slave we are requesting data from
//false indicates we are writing to the slave
ROM_I2CMasterSlaveAddrSet(MASTER_BASE, txAddress, false);
while(ROM_I2CMasterBusy(MASTER_BASE));
unsigned long cmd = RUN_BIT | START_BIT;
error = sendTxData(cmd,txBuffer[txReadIndex]);
txReadIndex = (txReadIndex + 1) % BUFFER_LENGTH;
if(error) return error;
while(!TX_BUFFER_EMPTY) {
error = sendTxData(RUN_BIT,txBuffer[txReadIndex]);
txReadIndex = (txReadIndex + 1) % BUFFER_LENGTH;
if(error) return getError(error);
}
if(sendStop) {
while(ROM_I2CMasterBusy(MASTER_BASE));
HWREG(MASTER_BASE + I2C_O_MCS) = STOP_BIT;
while(ROM_I2CMasterBusy(MASTER_BASE));
currentState = IDLE;
}
else {
currentState = MASTER_TX;
}
// indicate that we are done transmitting
transmitting = 0;
return error;
}