C++ (Cpp) sendTxData Examples

Example #1

File: Wire.cpp Project: gferrera/AidaDSP

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;

}

Example #2

File: Wire_hotfix.cpp Project: coon42/CLP_floppyorgel

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;

}