time.s90

用iAR编写的AD转换程序

SREG    =   0x3f
SPH     =   0x3e
SPL     =   0x3d
TCNT0   =   0x32

                 MODULE Time
                 PUBLIC TimeTickISR

                 EXTERN TimeTick
                 
                 RSEG   CODE:CODE
TimeTickISR:
                 PUSH R16
                 PUSH R17
                 IN   R17,SREG
                 
                 LDI  R16,  256-(7372800/100/1024)
                 OUT  TCNT0,R16
                 
                 CALL TimeTick
                 
                 OUT  SREG,R17
                 POP  R17
                 POP  R16
                 RET
            
                 
       
                 COMMON  INTVEC
                 DS      9*4
                 JMP     TimeTickISR
                 ENDMOD
                 END