void UART_2_ISR(void)
{
/* Check for RX data valid interrupt */
if(UART_2_DEV->STATUS & LEUART_STATUS_RXDATAV) {
/* Copy data into RX Buffer */
uint8_t rxData = LEUART_Rx(UART_2_DEV);
irq_read(UART_2, rxData);
}
/* Check TX buffer level status */
if(UART_2_DEV->IF & LEUART_IF_TXBL & UART_2_DEV->IEN) {
#if UART_2_ENABLE_BUF
int data = ringbuffer_get_one(&rb_uart2);
if(-1 != data) {
/* Avoid deadlock if modifying the same register twice when freeze mode is */
/* activated. */
if(!(UART_2_DEV->FREEZE & LEUART_FREEZE_REGFREEZE)) {
/* Wait for any pending previous write operation to have been completed */
/* in low frequency domain */
while(UART_2_DEV->SYNCBUSY & LEUART_SYNCBUSY_TXDATA)
;;
}
/* Write data to TX register */
UART_2_DEV->TXDATA = (uint32_t)data;
} else {
LEUART_IntDisable(UART_2_DEV, LEUART_IF_TXBL);
}
#endif
}
if(sched_context_switch_request) {
thread_yield();
}
}
/*
*Function name: LEUART0_IRQHandler
*Description : Interrupt Service Routine for LEUART0.
*/
void LEUART0_IRQHandler(void)
{
leuartif = LEUART_IntGet(LEUART0); // Store the interrupt flag
LEUART_IntClear(LEUART0, leuartif); //Clear interrupts
if (leuartif & LEUART_IF_SIGF)
{
int temp = 0, i = 0;
char tempChar[7]; // To store the Value of Temperature in char to transmit
char temp_string[TX_bufferSize]; // Concatenated string for Message and Temperature, this will be transfered
char copyCmp[sizeof(commandString)/sizeof(char)]; // string to store the Received string from Buffer to compare
// Stop the LEUART reception and DMA Transfers
for (i = 0; i < (strlen(commandString)); i++) // Run loop till the return message (RetTemp!) length and copy RX buffer to copyCmp for comparing
{
copyCmp[i] = RX_Buffer[i];
}
copyCmp[8]='\0';
/* To extract the digits of the temperature variable and put in tempChar. A basic digit extraction algorithm is used and then each digit is passed one by one. */
if (!strcmp(commandString,copyCmp)) // If valid Command is Received ie RetTemp!
{
temp = temperature*10;
tempChar[0] = (temp/100)+48;
temp = temp%100;
tempChar[1] = (temp/10)+48;
temp = temp%10;
tempChar[2] = '.';
tempChar[3] = (temp)+48;
tempChar[4] = 'C';
tempChar[5] = '\r';
tempChar[6] = '\n';
strcpy(temp_string,returnMsg); //Copy the returnMsg message in the temporary string
strcat(temp_string,tempChar); // Concatenate with tempChar to get the final message to be transfered
// Enable DMA wake-up from LEUART0 TX
LEUART0->CTRL = LEUART_CTRL_TXDMAWU; // Enable DMA wake up for LEUART TX in EM2
// Activate DMA for LEUART TX transfers
DMA_ActivateBasic(DMA_CHANNEL_TX, true, false, (void *)&(LEUART0->TXDATA), (void *)temp_string, strlen(temp_string)- 1); // -1 for the Null character which we wont transmit
}
else
{
LEUART0->CTRL = LEUART_CTRL_TXDMAWU; // Enable DMA wake up for LEUART0 TX in EM2
// Activate DMA for LEUART TX transfers
DMA_ActivateBasic(DMA_CHANNEL_TX, true, false, (void *)&(LEUART0->TXDATA), (void *)errorMsg, strlen(errorMsg)-2); // -1 for the Null character which we wont transmit
}
LEUART_IntEnable(LEUART0, LEUART_IF_RXDATAV); //Enable RXDATA Interrupt to check for received characters
DMA_ActivateBasic(DMA_CHANNEL_RX, true, false, NULL, NULL, LEUART0_BUFFER-1);
}
else if (leuartif & LEUART_IF_RXDATAV)
{
LEUART_IntDisable(LEUART0, LEUART_IF_RXDATAV); // Disable after receiving
}
}
