sleep1.asm

来自「串口通信 频率测量 EEPROM读写程序」· 汇编 代码 · 共 55 行

       
          .include "c:\appnotes\2333def.inc"
          .org $000
           rjmp main
           .org $002
            rjmp INT1_RUN
           .org $007
           rjmp SPI_TXC               
          .org $00d
     MAIN: ldi r17,$df
           out SPL,r17         
           ldi r25,$80
           out SREG,r25 ;enable globle interrupt            
           out GIMSK,r25 ;enable INT!
           ldi r25,0b00001100
           out MCUCR,r25; set INT! low level trigger        
           ldi r20,$00
           out ADCSR,r20    ;Disnable ADC     
           ldi r17,$08
           out WDTCR,r17;enable wacthdog
           wdr          ;reset wachdog
           ser r16
           out DDRC,r16 ;portb is output mode and turn off all LEDS                           
           sbi DDRB,3    ;set MOSI(PB.5) output mode whwn SPI is master.
           sbi DDRB,5    ;set SCK (PB.7) output mode when SPI is master
           sbi DDRB,2    ;set SS output mode so that this byte cann't
                         ;influence SPI master work mode .
           ldi r17,0b11111100
           out SPCR,r17  ;set SPIE,SPE,MSTR,CPOL,CPHA ,reset the others   
           ldi r21,$73
           out SPDR , r21 ;,the rightest LED display "P"  
           ldi r17,$01
           out PORTC,r17 ;PC.0 output 1                                                                                                             
           rcall delay           
           wdr                                  
           rjmp main
   SPI_TXC:sbi SPCR,4
           reti
  INT1_RUN:ldi r21,$00
           out SPDR,r21 ; turn off "P" at the rightest LED; 
           ldi r17,$01
           out PORTC,r17 ;PC.0 output 1
           rcall delay       
           reti
   delay:  ldi r21,$1
        d2:ldi r22,$0f 
        d1:ldi r23,$ff
        d0:dec r23
           wdr           
           brne d0            
           dec r22                      
           brne d1
           dec r21         
           brne d2
           ret