/***********************************************************************************
* @fn halUartPollRx
*
* @brief Poll for data from USB.
*
* @param none
*
* @return none
*/
void halUartPollRx(void)
{
uint8 cnt;
uint8 ep = USBFW_GET_SELECTED_ENDPOINT();
USBFW_SELECT_ENDPOINT(4);
/* If the OUT endpoint has received a complete packet. */
if (USBFW_OUT_ENDPOINT_DISARMED())
{
halIntState_t intState;
HAL_ENTER_CRITICAL_SECTION(intState);
/* Get length of USB packet, this operation must not be interrupted. */
cnt = USBFW_GET_OUT_ENDPOINT_COUNT_LOW();
cnt += USBFW_GET_OUT_ENDPOINT_COUNT_HIGH() >> 8;
HAL_EXIT_CRITICAL_SECTION(intState);
while (cnt--)
{
halUartRxQ[halUartRxT++] = HWREG(USB_F4);
}
USBFW_ARM_OUT_ENDPOINT();
/* If the USB has transferred in more Rx bytes, reset the Rx idle timer. */
/* Re-sync the shadow on any 1st byte(s) received. */
if (rxTick == 0)
{
rxShdw = ST0;
}
rxTick = HAL_UART_USB_IDLE;
}
else if (rxTick)
/***********************************************************************************
* @fn usbOutProcess
*
* @brief Handle traffic flow from USB to RF.
*
* @param none
*
* @return none
*/
static void usbOutProcess(void)
{
uint8 length, nToSend;
// If new packet is ready in USB FIFO
halIntOff();
oldEndpoint = USBFW_GET_SELECTED_ENDPOINT();
USBFW_SELECT_ENDPOINT(4);
if (USBFW_OUT_ENDPOINT_DISARMED() ) {
// Get length of USB packet, this operation must not be interrupted.
length = USBFW_GET_OUT_ENDPOINT_COUNT_LOW();
length+= (int)(USBFW_GET_OUT_ENDPOINT_COUNT_HIGH()) >> 8;
// Calculate number of bytes available in RF buffer; and the number
// of bytes we may transfer in this operation.
nToSend= MIN(BUF_SIZE - bufNumBytes(&rbRxBuf), length);
// Space available in UART RX buffer ?
if (nToSend>0)
{
// Read from USB FIFO
usbfwReadFifo(&USBF4, nToSend, buffer);
// Write to radio TX buffer
bufPut(&rbRxBuf,buffer,nToSend);
// If entire USB packet is read from buffer
if (length == nToSend)
{
USBFW_SELECT_ENDPOINT(4);
USBFW_ARM_OUT_ENDPOINT();
}
}
}
USBFW_SELECT_ENDPOINT(oldEndpoint);
halIntOn();
}
/***********************************************************************************
* @fn usbOutProcess
*
* @brief Handle traffic flow from USB to RF.
*
* @param none
*
* @return none
*/
static void usbOutProcess(void)
{
uint8 length, /*nToSend,*/ packetlength=0;
// If new packet is ready in USB FIFO
halIntOff();
oldEndpoint = USBFW_GET_SELECTED_ENDPOINT();
USBFW_SELECT_ENDPOINT(4);
if (USBFW_OUT_ENDPOINT_DISARMED() ) {
// Get length of USB packet, this operation must not be interrupted.
length = USBFW_GET_OUT_ENDPOINT_COUNT_LOW();
length+= USBFW_GET_OUT_ENDPOINT_COUNT_HIGH() >> 8;
// Avoid overflow
message_length = USB_MAX_MESSAGE_LENGTH;
if (usb_bufferIndex + length > USB_MAX_MESSAGE_LENGTH) usb_bufferIndex=0;
// Copy received bytes from FIFO to buffer
usbfwReadFifo(&USBF4, length, &usb_buffer[usb_bufferIndex]);
// Increase buffer index
usb_bufferIndex += length;
// If entire USB packet is read from buffer
USBFW_SELECT_ENDPOINT(4);
USBFW_ARM_OUT_ENDPOINT();
// get packet lenght from byte #2 of received packet
if ((usb_bufferIndex >= 2) && (packetlength == 0)) packetlength = usb_buffer[2];
if ((usb_bufferIndex > packetlength-1) && (packetlength >= USB_MIN_MESSAGE_LENGTH))
{
//extract data from packet
usb_decode();
usb_bufferIndex = 0;
}
/*
// Calculate number of bytes available in RF buffer; and the number
// of bytes we may transfer in this operation.
nToSend= MIN(BUF_SIZE - bufNumBytes(&rbRxBuf), length);
// Space available in UART RX buffer ?
if (nToSend>0)
{
// Read from USB FIFO
usbfwReadFifo(&USBF4, nToSend, buffer);
// Write to radio TX buffer
bufPut(&rbRxBuf,buffer,nToSend);
// If entire USB packet is read from buffer
if (length == nToSend)
{
USBFW_SELECT_ENDPOINT(4);
USBFW_ARM_OUT_ENDPOINT();
}
}*/
}
USBFW_SELECT_ENDPOINT(oldEndpoint);
halIntOn();
}
