/* This call only retrieves data that is already waiting in the USB buffer -- that is, data that has
* already been received by the MCU. It assumes a previous, open receive operation (began by a direct
* call to USBxxx_receiveData()) is NOT underway on this interface; and no receive operation remains
* open after this call returns. It doesn't check for kUSBxxx_busNotAvailable, because it doesn't
* matter if it's not. size is the maximum that is allowed to be received before exiting; i.e., it
* is the size allotted to dataBuf. Returns the number of bytes received. */
WORD phdcReceiveDataInBuffer (BYTE* dataBuf, WORD size, BYTE intfNum)
{
WORD bytesInBuf;
WORD rxCount = 0;
BYTE* currentPos = dataBuf;
while (bytesInBuf = USBPHDC_bytesInUSBBuffer(intfNum)){
if ((WORD)(currentPos - dataBuf + bytesInBuf) <= size){
rxCount = bytesInBuf;
USBPHDC_receiveData(currentPos,rxCount,intfNum);
currentPos += rxCount;
} else {
rxCount = size - (currentPos - dataBuf);
USBPHDC_receiveData(currentPos,rxCount,intfNum);
currentPos += rxCount;
return (currentPos - dataBuf);
}
}
return (currentPos - dataBuf);
}
/* This call only retrieves data that is already waiting in the USB buffer -- that is, data that has
* already been received by the MCU. It assumes a previous, open receive operation (began by a direct
* call to USBxxx_receiveData()) is NOT underway on this interface; and no receive operation remains
* open after this call returns. It doesn't check for kUSBxxx_busNotAvailable, because it doesn't
* matter if it's not. size is the maximum that is allowed to be received before exiting; i.e., it
* is the size allotted to dataBuf. Returns the number of bytes received. */
uint16_t phdcReceiveDataInBuffer (uint8_t* dataBuf, uint16_t size, uint8_t intfNum)
{
uint16_t bytesInBuf;
uint16_t rxCount = 0;
uint8_t* currentPos = dataBuf;
while (bytesInBuf = USBPHDC_bytesInUSBBuffer(intfNum)){
if ((uint16_t)(currentPos - dataBuf + bytesInBuf) <= size){
rxCount = bytesInBuf;
USBPHDC_receiveData(currentPos,rxCount,intfNum);
currentPos += rxCount;
} else {
rxCount = size - (currentPos - dataBuf);
USBPHDC_receiveData(currentPos,rxCount,intfNum);
currentPos += rxCount;
return (currentPos - dataBuf);
}
}
return (currentPos - dataBuf);
}
