/*******************************************************************************
* FUNCTION: vUART2FlushRxBuffer
*
* PARAMETERS:
* ~ void
*
* RETURN:
* ~ void
*
* DESCRIPTIONS:
* Flush all the data in the Rx buffer.
*
*******************************************************************************/
void vUART2FlushRxBuffer(void)
{
unsigned char ucReceivedData;
unsigned int iStatus = INTDisableInterrupts();
prv_xRx.uiDataCount = 0;
prv_xRx.uiReadPt = 0;
prv_xRx.uiWritePt = 0;
// Discard all data available in the UART receive buffer.
while (UARTReceivedDataIsAvailable(UART2)) {
// Read the received data.
ucReceivedData = UARTGetDataByte(UART2);
}
// Clear the overrun flag.
if (UARTGetLineStatus(UART2) & UART_OVERRUN_ERROR) {
U2STAbits.OERR = 0;
}
// Clear the semaphore.
xSemaphoreTake(xBluetoothRxSemaphore, 0);
INTRestoreInterrupts(iStatus);
}
/*******************************************************************************
* ISR: UART 2 Interrupt.
*
* DESCRIPTIONS:
* Interrupt vector for UART 2.
*
*******************************************************************************/
void __ISR(_UART_2_VECTOR, IPL7AUTO) UART2Interrupt(void)
{
unsigned char ucReceivedData;
xSystemState.bBluetoothBusy = 1;
// Rx interrupt.
if (INTGetEnable(INT_U2RX) && INTGetFlag(INT_U2RX)) {
INTClearFlag(INT_U2RX);
// Read out all data available.
while (UARTReceivedDataIsAvailable(UART2)) {
// Read the received data.
ucReceivedData = UARTGetDataByte(UART2);
// Make sure there is empty space in the buffer.
if ((prv_xRx.uiBufferSize - prv_xRx.uiDataCount) > 0) {
// Copy the data to the buffer.
prv_xRx.pucBuffer[prv_xRx.uiWritePt] = ucReceivedData;
// Increase the write pointer and data count.
prv_vIncPointer(&prv_xRx.uiWritePt, prv_xRx.uiBufferSize);
prv_xRx.uiDataCount++;
portBASE_TYPE xHigherPriorityTaskWoken = pdFALSE;
xSemaphoreGiveFromISR(xBluetoothRxSemaphore, &xHigherPriorityTaskWoken);
}
else {
xSystemError.bBluetoothError = 1;
}
}
}
// Tx interrupt.
if (INTGetEnable(INT_U2TX) && INTGetFlag(INT_U2TX)) {
// Loop until the Tx buffer is fully filled.
while (UARTTransmitterIsReady(UART2)) {
// If there is data to transmit...
if (prv_xTx.uiDataCount > 0) {
// Shift in the data to the transmit buffer.
UARTSendDataByte(UART2, prv_xTx.pucBuffer[prv_xTx.uiReadPt]);
// Increase the read pointer and decrease the data count.
prv_vIncPointer(&prv_xTx.uiReadPt, prv_xTx.uiBufferSize);
prv_xTx.uiDataCount--;
}
// Else, disable the transmit interrupt.
else {
INTEnable(INT_U2TX, INT_DISABLED);
break;
}
}
}
// Error Interrupt.
if (INTGetEnable(INT_U2E) && INTGetFlag(INT_U2E)) {
INTClearFlag(INT_U2E);
// Discard all data available.
while (UARTReceivedDataIsAvailable(UART2)) {
// Read the received data.
ucReceivedData = UARTGetDataByte(UART2);
}
// Clear the overrun flag.
if (UARTGetLineStatus(UART2) & UART_OVERRUN_ERROR) {
U2STAbits.OERR = 0;
}
xSystemError.bBluetoothError = 1;
}
}
void hal_uart_interrupt_handler(hal_uart_port port) {
UART_MODULE uart = logic_uart2phy_uart(port);
assert(port >= HAL_UART_PORT_1 && port <= HAL_UART_NUMBER_OF_PORTS );
/* get the txbuffer to send */
struct txbuffer_struct *buffer = get_tx_buffer(port);
/* If the source of interrupt is the TXInterrupt, start
* transmitting the data in output queue. */
if (INTGetFlag(INT_SOURCE_UART_TX(uart))) {
/* Clear interrupt to prevent reentry */
INTClearFlag(INT_SOURCE_UART_TX(uart));
/* if queue is not empty, send tx data to uart while available. */
while (buffer->nbytes > 0) {
if (UARTTransmitterIsReady(uart)) {
UARTSendDataByte(uart, buffer->buffer[buffer->counter++]);
/* decrement buffer count after byte was transmitted */
buffer->nbytes --;
} else {
break;
}
}
/* if queue is empty, disable tx interrupt. */
if (buffer->nbytes <= 0) {
INTEnable(INT_SOURCE_UART_TX(uart), INT_DISABLED);
if(on_data_sent[port]!=NULL)
on_data_sent[port](port);
}
}
/* detect uart rx errors */
if(INTGetFlag(INT_SOURCE_UART_ERROR(uart))){
uint8_t in_byte = 0x00;
hal_uart_error error = HAL_UART_ERR_NONE;
volatile UART_LINE_STATUS lineStatus = UARTGetLineStatus(uart);
/* detect framming error. (break)*/
/* Framing error are only valid if data is available in buffer. */
if(UART_FRAMING_ERROR & lineStatus){
/* trigger an on_data_received_callback */
error = HAL_UART_ERR_FRAMMING;
}
/* detect uart overrun errors. */
if(UART_OVERRUN_ERROR & lineStatus)
{
error = HAL_UART_ERR_OVERRUN;
/* TODO: Not sure what to do if buffer overruns (it means data
* arrives faster than we are able to process. So just
* clear error and continue with our lives as nothing happened.
*/
UARTClearOverrunError(uart);
}
if(UART_PARITY_ERROR & lineStatus){
error = HAL_UART_ERR_PARITY;
}
if(UARTReceivedDataIsAvailable(uart)){
in_byte = UARTGetDataByte(uart);
}
if(on_data_received[port]!=NULL)
on_data_received[port](port,in_byte,error);
/* clear the error flag. */
INTClearFlag(INT_SOURCE_UART_ERROR(uart));
}
/* If receive interrupt was triggered, feed user apps with data. */
if (INTGetFlag(INT_SOURCE_UART_RX(uart))) {
/* Clear interrupt to prevent reentry */
INTClearFlag(INT_SOURCE_UART_RX(uart));
/* Copy the received data into input buffer */
while (UARTReceivedDataIsAvailable(uart)) {
uint8_t c = UARTGetDataByte(uart);
if(on_data_received[port]!=NULL)
on_data_received[port](port, c,HAL_UART_ERR_NONE);
}
}
}
void __ISR(_UART_2_VECTOR, IPL5SOFT) UART2_isr(void)
{
uint8_t ErrFiFoFull = 0;
uint8_t freeSize, TXsize;
int8_t c;
uint8_t i_cts = 0;
BOOL TxPossible;
UART_LINE_STATUS lineStatus;
// Is this an RX interrupt ?
if ( INTGetFlag(INT_U2RX) && INTGetEnable(INT_U2RX) ) {
// oui Test si erreur comm
lineStatus = UARTGetLineStatus(UART2);
if ( (lineStatus & (UART_PARITY_ERROR | UART_FRAMING_ERROR |
UART_OVERRUN_ERROR)) == 0) {
// transfert dans le fifo de tous les caractères recu
while (UARTReceivedDataIsAvailable(UART2))
{
c = UARTGetDataByte(UART2);
PutCharInFifo ( &descrFifoRX, c);
}
INTClearFlag(INT_U2RX); // buffer is empty, clear interrupt flag
} else {
UART2ClearAllErrors(); // Macro C32
}
freeSize = GetWriteSpace ( &descrFifoRX);
if (freeSize <= 6 ) // a cause d'un int pour 6 char
{
// Demande de ne plus émettre
//RS232_RTS = 1;
if (freeSize == 0) {
ErrFiFoFull = 1; // pour debugging si probème ctrl flux
}
}
} // end if RX
// Is this an TX interrupt ?
if(INTGetFlag(INT_U2TX) && INTGetEnable(INT_U2TX) ) {
TXsize = GetReadSize (&descrFifoTX);
// i_cts = input(RS232_CTS);
// On vérifie 3 conditions :
// Si CTS = 0 (autorisation d'émettre)
// Si il y a un caratères à émettre
// Si le txreg est bien disponible
//i_cts = RS232_CTS;
TxPossible = UARTTransmitterIsReady(UART2);
//if ( (i_cts == 0) && ( TXsize > 0 ) && TxPossible ) {
if ( ( TXsize > 0 ) && TxPossible ) {
do {
GetCharFromFifo(&descrFifoTX, &c);
UARTSendDataByte(UART2, c);
//i_cts = RS232_CTS;
TXsize = GetReadSize (&descrFifoTX);
TxPossible = UARTTransmitterIsReady(UART2);
//} while ( (i_cts == 0) && ( TXsize > 0 ) && TxPossible );
} while ( ( TXsize > 0 ) && TxPossible );
// Clear the TX interrupt Flag (Seulement aprés TX)
INTClearFlag(INT_U2TX);
} else {
// disable TX interrupt
INTEnable(INT_U2TX, INT_DISABLED);
}
}
} // UART_isr
