In SX Microcontrollers, SX/B Compiler and SX-Key Tool, hainguyen51 wrote:

Hi Bean,

Would you please to take a look for me to find out why once in a while I have an extra pulse in between the right ones. Basically, I have 1 Hz signal to rb.0, as soon as the + edge arises, I delay 2t then I have a hi pulse of 1t then goes lo. I just want to shift 1Hz signal a delay of 2t.

Thanks
Hai


device SX28L,OSCHS3,TURBO,STACKX_OPTIONX   
 id 'ECU103'
 reset start   ;Jump to reset_entry on reset.
 FREQ 50000000    ;50MHz target frequency.
;
;Define inputs, outputs, and registers
;
	clock_select	=	RA.1
	clock_pin	=	RB.0
	mon_pin		=	RB.1 
	time1_en	=	RB.2  
	delay_count	=	$08
	delay_count1	=	$09 
	delay_count2	=	$0A
	time_count	=	$0B
	loop_count	=	$0C
;
 		ORG $00    ;Program start at address 00h.
		interrupt
		RETI
;
start
		MOV M,#$0F ;Set up MODE register.
  		MOV !RB, #$FF ;Set $00 make RB all Inputs.
  		MOV !RC, #$00 ;Set $00 make RC all Outputs.
  		MOV M,#$0E ;Set up MODE for PULL-UP configuration.
  		MOV !RB, #$00 ;Set $00 make RB all inputs' Pullup.
  		MOV !RC, #$00 ;Set $00 make RC all Outputs' Pullup.
;
  		MOV M,#$0A
  		MOV !RB, #$00 ;Set $00 make +slope detect at RB pins.
;
  		MOV M,#$09  ; Prepare to use WKPND_B register
  		MOV W,#$00  ; Assume all bits off initially
  		MOV !RB,W    ; Zero all edge detection bits
;
  		MOV rc, #$00
		MOV	delay_count1,#10		;Set delay_count1 for 3min. Sub-program.
		MOV	delay_count2,#10		;Set delay_count2 for 3min. Sub-program.
;
main		
  		MOV !RB,W ; This will put the register bits in W
 	 	TEST W     ; Is W zero ?
  		SZ            ; Yes, then no edges detected, so skip SETB 
 		JMP output
 	 	JMP main
;
output
start_delay1	MOV	time_count,#40  
count_loop1	
		CALL	delay
		DJNZ	time_count,count_loop1
;
start_delay2	MOV	time_count,#20  
count_loop2	SETB	rc.0
		CALL	delay
		DJNZ	time_count,count_loop2
 		CLRB rc.0
 		JMP main
;
delay						;Long delay loop.	
delay1	
delay2		NOP				
		NOP
		NOP		
		NOP		
		NOP
		NOP
		NOP				
		NOP
		NOP		
		NOP		
		NOP
		NOP
		NOP
		NOP
		NOP
		NOP
		NOP
		NOP
		NOP
		NOP
		NOP
		NOP		
		NOP
		NOP
		NOP
		NOP
		NOP
		NOP
		NOP
		NOP
		NOP
		NOP
		NOP		
		NOP
		NOP
		NOP
		NOP
		NOP
		NOP
		NOP
		NOP
		NOP
		NOP
		NOP
		NOP					
		DJNZ	delay_count2, delay2	
		DJNZ	delay_count1, delay1
		MOV	delay_count1,#10
		MOV	delay_count2,#10
		RET

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