/***********************************************************************************
* @fn appLoopbackTask
*
* @brief Checks if new bytes have arrived from the UART and echo them back.
*
* @param none
*
* @return none
*/
static void appLoopbackTask(void)
{
uint8 nBytes, n;
nBytes = halUartGetNumRxBytes();
if( nBytes>0 ) {
n= MIN(sizeof(pTxData),nBytes);
halUartRead(pTxData,n);
halUartWrite(pTxData,n);
}
}
/***********************************************************************************
* @fn appRfSenderTask
*
* @brief Checks if new bytes have arrived from the UART. If there
* are enough bytes to fill a maximal sized packet, or if the UART
* is idle, the bytes are transmitted on the air.
*
* @param none
*
* @return none
*/
static void appRfSenderTask(void)
{
uint8 nBytes;
uint8 payloadLength;
uint8 bytesToRead;
nBytes = halUartGetNumRxBytes();
payloadLength= 0;
bytesToRead= 0;
if(nBytes >= APP_PAYLOAD_LENGTH || (appUartRxIdle && nBytes>0) ) {
// Signal PC not to send on UART, while sending on air.
halUartEnableRxFlow(FALSE);
// Wait for PC to respond
halMcuWaitUs(1000);
bytesToRead = MIN(nBytes, APP_PAYLOAD_LENGTH);
halUartRead(pTxData,bytesToRead);
payloadLength+= bytesToRead;
halLedToggle(3);
if( (mrfiLinkSend(pTxData, payloadLength,N_RETRIES)) != MRFI_TX_RESULT_SUCCESS) {
nTxErr++;
appUpdateDisplay();
}
// Signal RX flow on
halUartEnableRxFlow(TRUE);
// Restart idle timer
halTimer32kRestart();
halTimer32kIntEnable();
// Reset idle fimer flag
appUartRxIdle = FALSE;
}
}
void usbReceiveData (void) {
uint8_t tempData[128] = { 0 };
size_t uartRxIndex = 0;
bool txCalcCRC8 = false;
bool txCalcCRC16 = false;
uint8_t txLength = 0;
static uint8_t uartRxBuffer[SIZE_OF_UART_RX_BUFFER] = { 0 };
uint8_t txTimes = 0;
uint16_t nBytes = halUartGetNumRxBytes();
size_t i = 0;
for( i=0; i<nBytes; i=i+48) {
uint16_t readBytes;
if (nBytes-i > 48) {
readBytes = 48;
} else {
readBytes = nBytes-i;
}
halUartRead( &tempData[i], readBytes);
usbUartProcess();
}
for( i=0; i<nBytes; i++) {
// Read Rx buffer
uartRxBuffer[uartRxIndex] = tempData[i];
switch( uartRxIndex ) {
case 0: {
switch( uartRxBuffer[0] ) {
case 0x01:
uartRxIndex++;
txCalcCRC8 = false;
txCalcCRC16 = false;
enableTimerInt();
break;
case 0x81:
uartRxIndex++;
txCalcCRC8 = true;
txCalcCRC16 = false;
enableTimerInt();
break;
case 0xC1:
uartRxIndex++;
txCalcCRC8 = false;
txCalcCRC16 = true;
enableTimerInt();
break;
case 0x03:
case 0x13:
txFilterEnabled = true;
P1_1 = 0;
uartRxBuffer[0] = 0x03;
halUartWrite(uartRxBuffer,1);
break;
case 0x00:
uartRxBuffer[0] = _MMCOMMANDER_VERSION_ ;
halUartWrite(uartRxBuffer,1);
break;
}
break;
}
case 1: {
txLength = uartRxBuffer[1];
uartRxIndex++;
resetTimerCounter();
break;
}
case 2: {
txTimes = uartRxBuffer[2];
uartRxIndex++;
resetTimerCounter();
break;
}
default: {
resetTimerCounter();
if (uartRxIndex == (txLength + 2)) {
stopTimerInt();
if (txCalcCRC8 ) {
uartRxBuffer[++uartRxIndex] = crc8(&uartRxBuffer[3], (size_t)(txLength));
txLength++;
}
if (txCalcCRC16 ) {
uint16_t const tmpCRC16 = crc16 (&uartRxBuffer[3],(size_t)(txLength));
uartRxBuffer[++uartRxIndex] = (uint8_t)((tmpCRC16 >> 8) & 0x00FF);
uartRxBuffer[++uartRxIndex] = (uint8_t)(tmpCRC16 & 0x00FF);
txLength += 2;
}
if (txFilter(&uartRxBuffer[3],txLength) == 0) {
sendMedtronicMessage(&uartRxBuffer[3],txLength,txTimes);
halUartWrite( uartRxBuffer, 3 );
uartRxIndex=0;
} else {
uartRxBuffer[1]=0x00;
uartRxBuffer[2]=0x00;
halUartWrite( uartRxBuffer, 3 );
uartRxIndex=0;
}
} else {
uartRxIndex++;
}
break;
}
}