?? fifo.c
字號(hào):
#include "config.h"
#include "regmap.h"
#include "global.h"
#include "dma.h"
#include "fifo.h"
unsigned FifoGetByte(tFifo *fifo)
{
unsigned c = fifo->data[fifo->tail];
FifoTailAdv(fifo, 1);
return c;
}
unsigned FifoGetWord(tFifo *fifo)
{
int t,s;
BYTE *d;
unsigned c;
t = fifo->tail;
s = fifo->size;
d = fifo->data;
c = d[t];
t = WRAPl(t+1,s);
c = (c<<8) | d[t];
fifo->tail = WRAPl(t+1,s);
return c;
}
int FifoDMARead(tFifo *f, int p, int len)
{
int i;
BYTE c;
for (i=0; i<len; i++)
{
c = FifoGetByte(f);
dma_buf.b[i+p] = c;
}
return 0;
}
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