void zb_sniffer_logic_iteration()
{
#ifndef ZB_SNIFFER_USB_TRACE
zb_uint8_t nbytes = bufNumBytes(&rbTxBuf);
if (bufNumBytes(&rbTxBuf) && !SER_CTX().tx_in_progress)
{
ZB_SET_SERIAL_TRANSMIT_FLAG();
}
else
{
ZB_GO_IDLE();
}
#else
usbUartProcess();
#endif
}
/***********************************************************************************
* @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 usbInProcess
*
* @brief Handle traffic flow from RF to USB.
*
* @param none
*
* @return none
*/
static void usbInProcess(void)
{
uint8 length;
// USB ready to accept new IN packet
halIntOff();
oldEndpoint = USBFW_GET_SELECTED_ENDPOINT();
USBFW_SELECT_ENDPOINT(4);
// The IN endpoint is ready to accept data
if ( USBFW_IN_ENDPOINT_DISARMED() )
{
// Number of bytes present in RF buffer
length= bufNumBytes(&rbTxBuf);
if (length>0) {
// Limit the size
if (length > USB_MAX_PACKET_SIZE)
{
length = USB_MAX_PACKET_SIZE;
}
// Read from UART TX buffer
bufGet(&rbTxBuf,buffer,length);
// Write to USB FIFO
usbfwWriteFifo(&USBF4, length, buffer);
// Flag USB IN buffer as not ready (disarming EP4)
USBFW_SELECT_ENDPOINT(4);
USBFW_ARM_IN_ENDPOINT(); // Send data to the host
}
}
USBFW_SELECT_ENDPOINT(oldEndpoint);
halIntOn();
}
/************************************************************************************
* @fn halUartGetNumRxBytes
*
* @brief Returns number of bytes in RX buffer
*
* @param none
*
* @return uint8
*/
uint16 halUartGetNumRxBytes(void)
{
return bufNumBytes(&rbRxBuf);
}
