epphal.c

STC51+PDIUSBD12 USB鼠标源代码

#include "mytype.h"
#include "stc51.h"
#define USB_A0       P3_5
#define USB_RD 		 P3_7
#define USB_WR       P3_6
#define USB_DATA       P0

//输出命令或数据
void outportb(uint8 Addr,uint8 Data)
{
  USB_A0=Addr;
  USB_DATA=Data;
  USB_WR=0;
  USB_WR=1;
  USB_DATA=0XFF;
}
//从端口读入数据
uint8 inportb(uint8 Addr)
{
  uint8 temp;
  USB_A0=Addr;
  USB_RD=0;
  temp=USB_DATA;
  USB_RD=1;
  return temp;
}