標(biāo)題:
使用帶參數(shù)的宏定義進(jìn)行計(jì)算
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作者:
liuda
時(shí)間:
2015-1-21 22:45
標(biāo)題:
使用帶參數(shù)的宏定義進(jìn)行計(jì)算
是用51hei單片機(jī)開發(fā)板 電路圖詳見:
http://www.torrancerestoration.com/f/51hei-5.pdf
的數(shù)碼管部分, 用2個(gè)74hc573 鎖存,p0口作為數(shù)據(jù)口 ,p3.6和p3.7分別是段和位的鎖存端口.
#include<reg52.h>
#define uchar unsigned char
#define uint unsigned int
#define S(a,b) (a-b)*3
uchar code SEG7[10]={0x3f,0x06,0x5b,0x4f,0x66,0x6d,0x7d,0x07,0x7f,0x6f};
sbit D=P3^6;
sbit V=P3^7;
//========================
void delay(uint k)
{
uint i,j;
for(i=0;i<k;i++){
for(j=0;j<121;j++)
{;}}
}
//==================
void main(void)
{
uchar out;
out=S(100,50);
while(1)
{
D=1;
P0=SEG7[out/100];
D=0;
P0=0xff;
V=1;
P0=0xfe;
V=0;
delay(1);
D=1;
P0=SEG7[(out%100)/10];
D=0;
P0=0xff;
V=1;
P0=0xfd;
V=0;
delay(1);
D=1;
P0=SEG7[out%10];
D=0;
P0=0xff;
V=1;
P0=0xfb;
V=0;
delay(1);
}
}
復(fù)制代碼
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