usbd_in.c

来自「usb drivers based on s3c2410」· C语言 代码 · 共 57 行

#include "usbd.h"
#include "usb.h"

#ifdef _DEBUG
#include <stdio.h>
#endif /* _DEBUG */

#define SET_EP1_IN_PKT_READY()  IN_CSR1_REG = (in_csr1 & (~ EPI_WR_BITS)\
 					| EPI_IN_PKT_READY )
#define SET_EP1_SEND_STALL()	  IN_CSR1_REG = ( in_csr1 & (~EPI_WR_BITS)\
					| EPI_SEND_STALL) )
#define CLR_EP1_SENT_STALL()	  IN_CSR1_REG = ( in_csr1 & (~EPI_WR_BITS)\
					& (~EPI_SENT_STALL) )
#define FLUSH_EP1_FIFO() 	      IN_CSR1_REG = ( in_csr1 & (~EPI_WR_BITS)\
					| EPI_FIFO_FLUSH) )
					
unsigned char ep1_buf[EP1_PKT_SIZE];
int transfer_index = 0;

static void 
prepare_ep1_fifo(void) 
{
  unsigned char in_csr1;
  int i;
  i=0;
  INDEX_REG = 1;
  in_csr1 = IN_CSR1_REG;

  for(i = 0; i < EP1_PKT_SIZE; i++)
  {
    ep1_buf[i]=(unsigned char)(transfer_index+i);
  }
  
  write_pkt_ep1(ep1_buf, EP1_PKT_SIZE);
  SET_EP1_IN_PKT_READY(); 
  delay(1);
}

void 
ep1_handler(void)
{
    unsigned char in_csr1;
    INDEX_REG = 1;
    in_csr1 = IN_CSR1_REG;
    
    if(in_csr1 & EPI_SENT_STALL)
    {   
   	  CLR_EP1_SENT_STALL();
   	  return;
    }	
    
    transfer_index++;
    prepare_ep1_fifo();
    return;
}