Hello, I am trying to modify the pulse width modulation (PWM) frequency. I have read the programming datasheet for FT81x guide from http://brtchip.com/wp-content/uploads/Support/Documentation/Programming_Guides/ICs/EVE/FT81X_Series_Programmer_Guide.pdf  on page 82;

These bits define the backlight PWM output frequency in HZ. The default is
250 Hz after reset. The valid frequency is from 250Hz to 10000Hz.

I try to change the default frequency to 10000Hz, but I do not see any change, this I want to do to decrease the noise generated by the backlight, it is modulated with the audio output.

It is possible to modify this frequency, with solfware, it is not possible. A bug?

Best regards. Tomás.

Hello, my name is Tomas.

I use my FT8xx screens for hobbies and also I have the honor of presenting our space, where friends are very enthusiastic about these screens.

We have modified library of James Bowman, my friend from Mexico @TFTLCDCyg and we have the whole family of STM32 F1x, F407 and F7xx working including playback video with sound. Also in Teensy 3.5/6

The repository; https://github.com/lightcalamar
and our forum this link; https://ft81xmania.com/comunidad/

Best regards from Spain