16F877 at 4 mhz
Begin:
PVAL = 1000 ' Start with 1kHz
For Duty = 64 to 250
HPWM 1,Duty,PVAL
PAUSE 100
NEXT Duty
Duty = 127 ' 50% Duty-cycle
For PVAL = 1000 to 10000 step 100 ' Increments of 100. Change as needed
HPWM 1,Duty,PVAL
PAUSE 100
Next PVAL
GOTO Begin
END
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