/**
* End the transmission and transmit the tx buffer's contents over the bus
*/
void DWire::endTransmission(bool sendStop) {
if (!*pTxBufferIndex) {
return;
}
// Wait until any ongoing (incoming) transmissions are finished
//while ( MAP_I2C_isBusBusy(module) == EUSCI_B_I2C_BUS_BUSY )
// ;
this->sendStop = sendStop;
// Send the start condition and initial byte
(*pTxBufferSize) = *pTxBufferIndex;
(*pTxBufferIndex)--;
// Send the first byte, triggering the TX interrupt
MAP_I2C_masterSendMultiByteStart(module, pTxBuffer[0]);
}
int main(void)
{
volatile uint32_t ii;
/* Disabling the Watchdog */
MAP_WDT_A_holdTimer();
/* Select Port 1 for I2C - Set Pin 6, 7 to input Primary Module Function,
* (UCB0SIMO/UCB0SDA, UCB0SOMI/UCB0SCL).
*/
MAP_GPIO_setAsPeripheralModuleFunctionInputPin(GPIO_PORT_P1,
GPIO_PIN6 + GPIO_PIN7, GPIO_PRIMARY_MODULE_FUNCTION);
sendStopCondition = false;
sendToSlaveAddress2 = false;
/* Initializing I2C Master to SMCLK at 400kbs with no autostop */
MAP_I2C_initMaster(EUSCI_B0_MODULE, &i2cConfig);
/* Specify slave address. For start we will do our first slave address */
MAP_I2C_setSlaveAddress(EUSCI_B0_MODULE, SLAVE_ADDRESS_1);
/* Set Master in receive mode */
MAP_I2C_setMode(EUSCI_B0_MODULE, EUSCI_B_I2C_TRANSMIT_MODE);
/* Enable I2C Module to start operations */
MAP_I2C_enableModule(EUSCI_B0_MODULE);
/* Enable and clear the interrupt flag */
MAP_I2C_clearInterruptFlag(EUSCI_B0_MODULE,
EUSCI_B_I2C_TRANSMIT_INTERRUPT0 + EUSCI_B_I2C_NAK_INTERRUPT);
//Enable master Receive interrupt
MAP_I2C_enableInterrupt(EUSCI_B0_MODULE,
EUSCI_B_I2C_TRANSMIT_INTERRUPT0 + EUSCI_B_I2C_NAK_INTERRUPT);
MAP_Interrupt_enableInterrupt(INT_EUSCIB0);
while (1)
{
/* Load Byte Counter */
TXByteCtr = 4;
/* Making sure the last transaction has been completely sent out */
while (MAP_I2C_masterIsStopSent(EUSCI_B0_MODULE) == EUSCI_B_I2C_SENDING_STOP);
/* Sending the initial start condition for appropriate
* slave addresses */
if(sendToSlaveAddress2)
{
MAP_I2C_setSlaveAddress(EUSCI_B0_MODULE, SLAVE_ADDRESS_2);
}
else
{
MAP_I2C_setSlaveAddress(EUSCI_B0_MODULE, SLAVE_ADDRESS_1);
}
MAP_I2C_masterSendMultiByteStart(EUSCI_B0_MODULE, TXData++);
while(sendStopCondition == false)
{
/* Go to sleep while data is being transmitted */
MAP_Interrupt_enableSleepOnIsrExit();
MAP_PCM_gotoLPM0InterruptSafe();
}
sendStopCondition = false;
}
}
