delay.lis

键盘扫描及其LCD显示输出,有源程序与仿真文件,都测试通过.

                        .module delay.c
                        .area text(rom, con, rel)
 0000                   .dbfile F:\AVR练习\key_lcd\delay.c
 0000                   .dbfunc e delay_1us _delay_1us fV
                        .even
 0000           _delay_1us::
 0000                   .dbline -1
 0000                   .dbline 5
 0000           ; #define DELAY_C
 0000           ; #include "includes.h"
 0000           ; #define XTAL 4    //晶振频率，单位MHz
 0000           ; void delay_1us(void)                 //1us延时函数
 0000           ;   {
 0000                   .dbline 6
 0000           ;    asm("nop");
 0000 0000              nop
 0002                   .dbline -2
 0002           L1:
 0002                   .dbline 0 ; func end
 0002 0895              ret
 0004                   .dbend
 0004                   .dbfunc e delay_nus _delay_nus fV
 0004           ;              i -> R20,R21
 0004           ;              n -> R22,R23
                        .even
 0004           _delay_nus::
 0004 00D0              rcall push_gset2
 0006 602F              mov R22,R16
 0008 712F              mov R23,R17
 000A                   .dbline -1
 000A                   .dbline 10
 000A           ;   }
 000A           ; 
 000A           ; void delay_nus(unsigned int n)       //N us延时函数
 000A           ;   {
 000A                   .dbline 11
 000A           ;    unsigned int i=0;
 000A 4427              clr R20
 000C 5527              clr R21
 000E                   .dbline 12
 000E           ;    for (i=0;i<n;i++)
 000E 03C0              rjmp L6
 0010           L3:
 0010                   .dbline 13
 0010 F7DF              rcall _delay_1us
 0012           L4:
 0012                   .dbline 12
 0012 4F5F              subi R20,255  ; offset = 1
 0014 5F4F              sbci R21,255
 0016           L6:
 0016                   .dbline 12
 0016 4617              cp R20,R22
 0018 5707              cpc R21,R23
 001A D0F3              brlo L3
 001C                   .dbline -2
 001C           L2:
 001C 00D0              rcall pop_gset2
 001E                   .dbline 0 ; func end
 001E 0895              ret
 0020                   .dbsym r i 20 i
 0020                   .dbsym r n 22 i
 0020                   .dbend
 0020                   .dbfunc e delay_1ms _delay_1ms fV
 0020           ;              i -> R16,R17
                        .even
 0020           _delay_1ms::
 0020                   .dbline -1
 0020                   .dbline 17
 0020           ;    delay_1us();
 0020           ;   }
 0020           ;   
 0020           ; void delay_1ms(void)                 //1ms延时函数
 0020           ;   {
 0020                   .dbline 19
 0020 0027              clr R16
 0022 1127              clr R17
 0024 02C0              rjmp L11
 0026           L8:
 0026                   .dbline 19
 0026           L9:
 0026                   .dbline 19
 0026 0F5F              subi R16,255  ; offset = 1
 0028 1F4F              sbci R17,255
 002A           L11:
 002A                   .dbline 19
 002A           ;    unsigned int i;
 002A           ;    for (i=0;i<(unsigned int)(XTAL*143-2);i++);
 002A 8AE3              ldi R24,570
 002C 92E0              ldi R25,2
 002E 0817              cp R16,R24
 0030 1907              cpc R17,R25
 0032 C8F3              brlo L8
 0034                   .dbline -2
 0034           L7:
 0034                   .dbline 0 ; func end
 0034 0895              ret
 0036                   .dbsym r i 16 i
 0036                   .dbend
 0036                   .dbfunc e delay_nms _delay_nms fV
 0036           ;              i -> R20,R21
 0036           ;              n -> R22,R23
                        .even
 0036           _delay_nms::
 0036 00D0              rcall push_gset2
 0038 602F              mov R22,R16
 003A 712F              mov R23,R17
 003C                   .dbline -1
 003C                   .dbline 23
 003C           ;   }
 003C           ;   
 003C           ; void delay_nms(unsigned int n)       //N ms延时函数
 003C           ;   {
 003C                   .dbline 24
 003C           ;    unsigned int i=0;
 003C 4427              clr R20
 003E 5527              clr R21
 0040                   .dbline 25
 0040           ;    for (i=0;i<n;i++)
 0040 03C0              rjmp L16
 0042           L13:
 0042                   .dbline 26
 0042                   .dbline 27
 0042 EEDF              rcall _delay_1ms
 0044                   .dbline 28
 0044           L14:
 0044                   .dbline 25
 0044 4F5F              subi R20,255  ; offset = 1
 0046 5F4F              sbci R21,255
 0048           L16:
 0048                   .dbline 25
 0048 4617              cp R20,R22
 004A 5707              cpc R21,R23
 004C D0F3              brlo L13
 004E                   .dbline -2
 004E           L12:
 004E 00D0              rcall pop_gset2
 0050                   .dbline 0 ; func end
 0050 0895              ret
 0052                   .dbsym r i 20 i
 0052                   .dbsym r n 22 i
 0052                   .dbend