.module _训练项目十一：LED及拨码开关的综合实验.c
.area text(rom, con, rel)
; uidelay_time -> R20,R21
; uitime -> R16,R17
.even
_Delay::
st -y,R20
st -y,R21
; /*******************************************Copyright(c)*******************************************
; ** ChangSha University of Science & Technology
; **
; ** http://www.csust.com
; **
; **-------File Info---------------------------------------------------------------------------------
; ** File Name: LED及拨码开关的综合试实验
; ** Latest modified Date: 2008.7.26
; ** Latest Version:
; ** Description: 通过控制方向寄存器来控制输出电平的高低，进而实现交互闪烁灯
; **
; **-------------------------------------------------------------------------------------------------
; ** Created By:
; ** Created date:
; ** Version:
; ** Descriptions:
; **
; **-------------------------------------------------------------------------------------------------
; ** Modified by: congdongliang
; ** Modified date: 2008.7.26
; ** Version:
; ** Description: 根据《代码规范》修改了部分变量命名及程序格式，使程序更规范
; **
; **************************************************************************************************/
;
; #include "iom128v.h"
;
; /**************************************************************************************************
; ** Function name: Delay
; ** Description: 延时程序
; ** input parameters:
; ** output parameters:
; ** Returned value:
; ** Created by:
; ** Created Date:
; **-------------------------------------------------------------------------------------------------
; ** Modified by: congdongliang
; ** Modified date: 2008.7.26
; **-------------------------------------------------------------------------------------------------
; **************************************************************************************************/
;
; void Delay (unsigned int uitime)
; {
; unsigned int uidelay_time;
;
; for(uidelay_time=0; uidelay_time clr R20
clr R21
xjmp L5
L2:
L3:
subi R20,255 ; offset = 1
sbci R21,255
L5:
cp R20,R16
cpc R21,R17
brlo L2
X0:
L1:
.dbline 0 ; func end
ld R21,y+
ld R20,y+
ret
.even
_main::
;
; }
;
; /**************************************************************************************************
; ** Function name: main
; ** Description: 通过控制寄存器来控制PA口输出电平的高低，来实现两个LED灯的交互
; ** 闪烁
; ** input parameters:
; ** output parameters:
; **
; ** Returned value:
; ** Created by:
; ** Created Date:
; **-------------------------------------------------------------------------------------------------
; ** Modified by: congdongliang
; ** Modified date: 2008.7.26
; **-------------------------------------------------------------------------------------------------
; **************************************************************************************************/
; void main ()
; {
; DDRA = 0xFF;
ldi R24,255
out 0x1a,R24
; PORTA= 0xFF;
out 0x1b,R24
; DDRB = 0x00;
clr R2
out 0x17,R2
; PORTB= 0xFF; /* 定义PA口、PB口的数据方向寄存器，以及对其数据寄存器初始化 */
out 0x18,R24
;
; for(;;){
L7:
; if((PINB & 0x01) == 0) {
sbic 0x16,0
rjmp L11
X1:
; PORTA = 0xFD; /* 判断PB0的状态，若为0，则执行LED交互闪烁 */
ldi R24,253
out 0x1b,R24
;
; Delay(6000);
ldi R16,6000
ldi R17,23
xcall _Delay
; Delay(6000);
ldi R16,6000
ldi R17,23
xcall _Delay
; Delay(6000);
ldi R16,6000
ldi R17,23
xcall _Delay
; Delay(6000);
ldi R16,6000
ldi R17,23
xcall _Delay
; Delay(6000);
ldi R16,6000
ldi R17,23
xcall _Delay
; Delay(6000);
ldi R16,6000
ldi R17,23
xcall _Delay
; Delay(6000);
ldi R16,6000
ldi R17,23
xcall _Delay
; Delay(6000);
ldi R16,6000
ldi R17,23
xcall _Delay
; Delay(6000);
ldi R16,6000
ldi R17,23
xcall _Delay
;
; PORTA = 0xFB;
ldi R24,251
out 0x1b,R24
;
; Delay(6000);
ldi R16,6000
ldi R17,23
xcall _Delay
; Delay(6000);
ldi R16,6000
ldi R17,23
xcall _Delay
; Delay(6000);
ldi R16,6000
ldi R17,23
xcall _Delay
; Delay(6000);
ldi R16,6000
ldi R17,23
xcall _Delay
; Delay(6000);
ldi R16,6000
ldi R17,23
xcall _Delay
; Delay(6000);
ldi R16,6000
ldi R17,23
xcall _Delay
; Delay(6000);
ldi R16,6000
ldi R17,23
xcall _Delay
; Delay(6000);
ldi R16,6000
ldi R17,23
xcall _Delay
; Delay(6000);
ldi R16,6000
ldi R17,23
xcall _Delay
; }else{
xjmp L7
L11:
;
; PORTA = 0xFF; /* PB0为1时，PA口输出全为1，LED全部不亮 */
ldi R24,255
out 0x1b,R24
; }
; }
xjmp L7
X2:
L6:
.dbline 0 ; func end
ret
; }
; /**************************************************************************************************
; END FILE
; **************************************************************************************************/
;
