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Generate pwm square wave at 300 khz frequency PIC18F47Q43

 
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akin54



Joined: 11 Jan 2021
Posts: 7

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Generate pwm square wave at 300 khz frequency PIC18F47Q43
PostPosted: Thu Dec 09, 2021 11:51 pm     Reply with quote
Code:

SETUP_PWM1(PWM_ENABLED | PWM_CLK_FOSC | PWM_CLK_DIV_BY_1);                 
set_pwm1_period(24);                                                       
set_pwm1_duty(1,12); 

This is the code for the pwm generator. This code operates at a frequency of 40 kHz with generation, but not exactly 40 kHz. I want to reach frequencies between 300-320 kHz. But it is impossible to enter the values ​​in float type of course. My microcontroller's pwm is 16 bit. Please help me.
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Ttelmah



Joined: 11 Mar 2010
Posts: 19549

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PostPosted: Fri Dec 10, 2021 1:21 am     Reply with quote
Key questions.
What Fosc are you running?. From what source?.
If you just want a square wave, look at the NCO, rather than the PWM.
Gives higher resolution at small division ratios.
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