/************************************************************************************//**
** \brief Receives a communication interface packet if one is present.
** \param data Pointer to byte array where the data is to be stored.
** \return BLT_TRUE if a packet was received, BLT_FALSE otherwise.
**
****************************************************************************************/
blt_bool UsbReceivePacket(blt_int8u *data)
{
static blt_int8u xcpCtoReqPacket[BOOT_COM_USB_RX_MAX_DATA+1]; /* one extra for length */
static blt_int8u xcpCtoRxLength;
static blt_bool xcpCtoRxInProgress = BLT_FALSE;
/* poll for USB events */
USB0DeviceIntHandler();
/* start of cto packet received? */
if (xcpCtoRxInProgress == BLT_FALSE)
{
/* store the message length when received */
if (UsbReceiveByte(&xcpCtoReqPacket[0]) == BLT_TRUE)
{
if (xcpCtoReqPacket[0] > 0)
{
/* indicate that a cto packet is being received */
xcpCtoRxInProgress = BLT_TRUE;
/* reset packet data count */
xcpCtoRxLength = 0;
}
}
}
else
{
/* store the next packet byte */
if (UsbReceiveByte(&xcpCtoReqPacket[xcpCtoRxLength+1]) == BLT_TRUE)
{
/* increment the packet data count */
xcpCtoRxLength++;
/* check to see if the entire packet was received */
if (xcpCtoRxLength == xcpCtoReqPacket[0])
{
/* copy the packet data */
CpuMemCopy((blt_int32u)data, (blt_int32u)&xcpCtoReqPacket[1], xcpCtoRxLength);
/* done with cto packet reception */
xcpCtoRxInProgress = BLT_FALSE;
/* packet reception complete */
return BLT_TRUE;
}
}
}
/* packet reception not yet complete */
return BLT_FALSE;
} /*** end of UsbReceivePacket ***/
/*
* ======== USBKBD_hwiHandler ========
* This function calls the USB library's device interrupt handler.
*/
static Void USBKBD_hwiHandler(UArg arg0)
{
USB0DeviceIntHandler();
}
/*
* ======== USBCDCD_LoggerIdle_hwiHandler ========
* This function calls the USB library's device interrupt handler.
*/
static Void USBCDCD_LoggerIdle_hwiHandler(UArg arg0)
{
USB0DeviceIntHandler();
}
__interrupt void
f28x_USB0DeviceIntHandler(void)
{
USB0DeviceIntHandler();
PieCtrlRegs.PIEACK.all |= 0x010;
}
