Hello, I want to make a simple PWM to drive a led. I need it when value is 0 the PWM output is all time 0, and when value is 255 the PWM output is all time 1.

Please, take a look in my code, I'm trying to figure out if it is making what I want.
Of course in later time I will modify to put it in the timer interrupt.

TL       EQU 078h
TH       EQU 079h
PWMPos   EQU 07Bh
PWMVal   EQU 07Ch


        MOV PWMVal,#0

Run:
        MOV TL,#0
        MOV TH,#10
        CALL Delay
        
        DEC PWMPos
        MOV A,PWMPos
        
        CJNE A,PWMVal,CEND
        JMP Run

CEND:   MOV P2.0,C
        JMP Run


Delay:  DJNZ TL,$
        MOV TL,#255
        DJNZ TH,Delay
        RET

END

 

Also, it is first time I work with PWM, even very fast, I know that the led is alwasy blinking, can I add something like a capacitor to make it a bit more smooth?


Thanks a lot!