Designer Reference Manual USB08 Evaluation Board
110 Source Code Files MOTOROLA
Source Code Files
// handle IN Packet Tra nsmit complete over EP1
//
void handleIN1() {
uchar n;
uchar *dest;
UCR1 &= ~BM_TX1E; // Deactivate EP1 Trans mitter
UIR2 = BM_TXD1FR; // Reset EP1 Transmit c omplete Flag
// refill EP1 Tx Data Buffer
n = 0;
dest = &UE1D0;
while((TxBuf_RdIdx != TxBuf_ Wr Id x) && n<8) {
*dest = TxBuffer[TxBuf_RdIdx ];
TxBuf_RdIdx = (TxBuf_Rd Idx+1) & (MAX_TXBUF_SIZE -1);
dest++;
n++;
}
// Activate EP1 Transmitter to send n Bytes
UCR1 = ((UCR1^BM_T1SEQ) & BM_T1SEQ) + BM_TX1E + n;
}
//--------------------- ------------------------ ----------------------- --------
// handle OUT Packet received over EP2
//
void handleOUT2() {
uchar n;
uchar newIdx;
uchar *src;
UCR2 &= ~BM_RX2E; // Deactivate EP2 Recei ver
UIR2 = BM_RXD2FR; // Reset EP2 Receive Fl ag
// ### Sender’s DATA Toggle sh ou ld be ch ecked!
// read out EP2 Rx Data Buffer
src = &UE2D0;
n = USR1 & BM_RP2SIZ; // Check Transfer Size
while(n) {
newIdx = (RxBuf_WrIdx+1 ) & (MAX_RXBUF_SIZE-1);
while(newIdx == RxBuf_RdIdx)
; // wait if TxBuffer is full
RxBuffer[RxBuf_WrIdx] = *src;
RxBuf_WrIdx = newIdx;
src++;
n--;
}
UCR2 = BM_RX2E; // Activate EP2 Receiver
}
//--------------------- ------------------------ ----------------------- --------