编程器读写错误

luoyaxu 2008-7-29 23:06 楼主

自制编程器:
   用并口的17脚触发计数器产生地址，16脚地址清零，14脚存储器oe控制，1脚存储器we控制。程序运行时
输入偶数结果正常，输入奇数结果出错。用fflush 及取消输入子函数调试无效。请智者示教。非常感谢！
程序如下：
#include"process.h"
#include"dos.h"
#include"stdio.h"

int data;

give_address()
{
outportb(0x37a,0x00);    /* cp=1 */
delay(100);
outportb(0x37a,0x08);    /*  cp=0  */
delay(1000);
outportb(0x37a,0x00);    /*  cp=1 */
return;
}

main()
{
int fig; char c;
outportb(0x37a,0x0c);
outportb(0x37a,0x08); /*  dizhi fuwei */
printf("\n");
printf("start ! !\n");
for(fig=4091;fig<=4095;fig++)
{
give_address();
printf("\n\n");
outportb(0x37a,0x20); /*  du chushihua */
delay(100);
outportb(0x37a,0x22);             /*  oe=0  */
printf("%d",fig);       /*  yao caozuo de danwei biaoshi  */
printf("yuan=%d\n",inportb(0x378));
outportb(0x37a,0x20);       /* oe=1 */
printf("  go on ? y--->continue");
c=getch();
if(c=='y')
{
give();
printf("data=%d",data);
printf("\n");
outportb(0x37a,0x00);  /*  xie chushihua(zhixiemoshi kongzhiqingling) */
outportb(0x378,data);    /*  shuju shangxian */
delay(100);
outportb(0x37a,0x01);    /* we=0 */
delay(100);
outportb(0x37a,0x00);    /* we=1    */
printf("  ok ! !\n");
}
else
printf("  no ! !\n");
}
printf("    OVER       \n") ;
}
give()
{
printf("  inputdata=");
scanf("%d",&data);
printf("data=%d",data);
return;
}