单片机实验 八段数码管显示 c语言 汇编

八段数码管显示汇编
OUTBIT equ 08002h ; 位控制口
OUTSEG equ 08004h ; 段控制口
LEDBuf equ 60h ; 显示缓冲
Num equ 70h ; 显示的数据
DelayT equ 75h ;
ljmp Start
LEDMAP: ; 八段管显示码
db 3fh, 06h, 5bh, 4fh, 66h, 6dh, 7dh, 07h
db 7fh, 6fh, 77h, 7ch, 39h, 5eh, 79h, 71h
Delay: ;
mov r7, #0
DelayLoop:
djnz r7, DelayLoop
djnz r6, DelayLoop
ret
DisplayLED:
mov r0, #LEDBuf
mov r1, #6 ;
mov r2, #00100000b ;
Loop:
mov dptr, #OUTBIT
mov a, #0
movx @dptr, a ;
mov a, @r0
mov dptr, #OUTSEG
movx @dptr,a
mov dptr, #OUTBIT
mov a, r2
movx @dptr, a ;
mov r6, #01
call Delay
mov a, r2 ;
rr a
mov r2, a
inc r0
djnz r1, Loop
mov dptr, #OUTBIT
mov a, #0
movx @dptr, a ;
ret
Start:
mov sp, #40h
mov Num, #0
MLoop:
mov Num, #0
inc Num
mov a, Num
mov b, a
mov r0, #LEDBuf FillBuf:
mov a, b
anl a, #0fh
mov dptr, #LEDMap
movc a, @a+dptr ;
mov @r0,a ;
inc r0
inc b
cjne r0, #LEDBuf+6, FillBuf
mov DelayT,#0 DispAgain:
call DisplayLED ;
djnz DelayT,DispAgain
ljmp MLoop
end
c语言
#include<reg51.h>
#define LEDLen 6
xdata unsigned char OUTBIT _at_ 0x8002; // 位控制口xdata unsigned char OUTSEG _at_ 0x8004; // 段控制口
unsigned char LEDBuf[LEDLen]; // 显示缓冲code unsigned char LEDMAP[] = { // 八段管显示码0x3f, 0x06, 0x5b, 0x4f, 0x66, 0x6d
};
void Delay(unsigned char CNT)
{ unsigned char i;
while (CNT-- !=0)
for (i=100; i !=0; i--);
}
void DisplayLED()
{ unsigned char i;
unsigned char Pos;
unsigned char LED;
Pos = 0x20; // 从左边开始显示
for (i = 0; i < LEDLen; i++)
{ OUTBIT = 0; // 关所有八段管LED = LEDBuf[i];
OUTSEG = LED;
OUTBIT = Pos; // 显示一位八段管
Delay(1);
Pos >>= 1; // 显示下一位}
OUTBIT = 0; // 关所有八段管
}
void main()
{ unsigned char i = 0;
unsigned char j;
while(1)
{ LEDBuf[0] = LEDMAP[i%6];
LEDBuf[1] = LEDMAP[(i+1)%6];
LEDBuf[2] = LEDMAP[(i+2)%6];
LEDBuf[3] = LEDMAP[(i+3)%6];
LEDBuf[4] = LEDMAP[(i+4)%6];
LEDBuf[5] = LEDMAP[(i+5)%6];
i++;
for(j=0; j<100; j++)
DisplayLED(); // 显示}
}。