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Sample code of PWM by ADC input with UCD3138

Hung-Jin Chen
Intellectual 650 points
Other Parts Discussed in Thread: UCD3138OL64EVM-031, UCD3138

Hello , 

I have a demo board of UCD3138OL64EVM-031 Rev.A , and want to generate a 20KHz PWM, the duty of PWM can be control by variable resister R16, to control the 4-lines’s fan. Does anyone can support a sample code for PWM and ADC utility ?

  • 0
    TI__Expert 4970 points

    Hung-Jin,

    Have you taken a look at the UCD3138 Training labs? Going through these labs should provide you with the answers you are looking for. I believe what you are asking is done in Lab 7. Please let me know if you need any more help on this. Thanks!

    Regards,

    Brandon Vonk

  • 0 in reply to Brandon Vonk
    Intellectual 650 points

    Dear Brandon,

    The output of lab7 is "DPWM0A", but I need the output pin is "PWM0" or "PWM1".

    Exactly saying, I will use 40 pins of UCD3138 for my project. So, I will use the pin 8 of  "UCD3138QFN".

    Could you please give me a explicit sample code ? (Including multi-function using, reading from R16 or R17 by ADCXX )

    Regards,

    Hung-Jin