AN6077
}
#define GPIFTRIGWR 0 #define GPIFTRIGRD 4
#define GPIF_EP2 0 #define GPIF_EP4 1 #define GPIF_EP6 2 #define GPIF_EP8 3
void TD_Poll( void )
{// Called repeatedly while the device is idle static WORD xFIFOTC_OUT = 0x0000;
static WORD xFIFOTC_IN = 0x0000;
// Registers which require a synchronization delay, see section 15.14
// FIFORESET | FIFOPINPOLAR |
// INPKTEND | OUTPKTEND |
// EPxBCH:L | REVCTL |
// GPIFTCB3 | GPIFTCB2 |
// GPIFTCB1 | GPIFTCB0 |
// EPxFIFOPFH:L | EPxAUTOINLENH:L |
// EPxFIFOCFG | EPxGPIFFLGSEL |
// PINFLAGSxx | EPxFIFOIRQ |
// EPxFIFOIE | GPIFIRQ |
// GPIFIE | GPIFADRH:L |
// UDMACRCH:L | EPxGPIFTRIG |
// GPIFTRIG |
|
OEA = 0xC0;
IOA = 0x80;
if( td_poll_handles_transfers )
{
//Handle OUT data
//is the peripheral interface idle
if( GPIFTRIG & 0x80 )
{
//DONE=1, when GPIF is "idle"
//check if there is a packet in the peripheral domain (EP2OUT) if( EP24FIFOFLGS & 0x02 )
{
//EF=1 when buffer "empty", for example, no more data to transfer
}
else
{
//EF=0, when slave fifo is "not empty"
//the cpu passed the packet to the peripheral domain (AUTO OUT)
//check if peripheral "not full"
if( GPIFREADYSTAT & 0x02 )
{
//RDY1=1, when peripheral is "not" FULL (tied to peripheral "full" flag)
//drive FIFOADDR lines
OEA = 0xC0;
IOA = 0x80;
xFIFOTC_OUT = ( ( EP2FIFOBCH << 8 ) + EP2FIFOBCL );
February 19, 2008 | Document No. | 10 |
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