Universal Remote Control R7 - SPECS SHEET Manual de usuario descargar pdf (Pagina 22)

S3F80KB_AN_REV 0.00 (Preliminary Spec) IR REMOTE CONTROLLER

;Set FOSC/256

LD T0OvrCntH,#00H

InitFast:

AND T1CON,#11111110B ;Clear Timer1 interrupt pending bit

OR T1CON,#00001000B ;Clear Timer1 counter

LDW IPH,#T1FastInt1st ;Load address of fast ISR

LD T1FastFlag,#00H ;fast inerrupt flag

LD T0OvrCnt,#00H ;T0OVR ISR counter

LD PulseCnt,#00H ;falling edge counter

LD R0,#080H

LD R2,#08H

LDW RR14,#0000H

LD R11,#0BH ;IR_Cnt pointer

LD R1,#04H

RcvLoop: ;loop until the first pulse received

TM T0OvrCntH,#04H ;check learning mode counter limit

JP NZ,LearningMode ;if T0OvrCntH > #04H,exit loop

TM R15,#01H ;pulse received

JR NZ,CheckNoise

JR RcvLoop

CheckNoise:

LD R3,P3

AND R3,#00001000B

;JP NZ,InitFast ;If P3.3 is not low, Pulse is noise

LDW RR12,RR6

;DJNZ R0,CheckNoise ;Check P3.3 for 3 times.

LD T0OvrCnt,#00H

;OR T1CON,#00001000B

;=============================================================================;

; @brief Leader signal capture ;

;=============================================================================;

LeaderHInit:

LDW RR4,SignalStart ;first signal time

Wait:

DJNZ R0,Wait

;Wait for the low signal

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Universal Remote Control R7 - SPECS SHEET Manual de usuario Pagina 22