Filter
Top Products
February 19, 2008 Document No. 001-15342 Rev. ** 10
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 );
[+] Feedback