IMXRT1064 PWM : How to drive PWM1 channels with different frequencies.

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IMXRT1064 PWM : How to drive PWM1 channels with different frequencies.

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Contributor II

Hello,

I am using I.MXRT1064 prototype board where GPIO_SD_B0_00 (i.e. PWM1, A, 0) is connected to LCD for controlling the brightness and GPIO_SD_B0_01 (i.e. PWM1, B, 0) to control the buzzer. Both are PWM1 channels A and B respectively.

I need to drive these two channel separately with different frequencies. e.g. 2730Hz for Buzzer and 120Hz for LCD.

I can set different duty cycles for each of these channels but could not find any register to assign different frequencies to these channels.

As per peripheral view shown below, I can set only one frequency for both of these channels.

vishaldahiwal_0-1599472673243.png

Is there any way by which I can set different frequencies for Channel A and Channel B?

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NXP TechSupport
NXP TechSupport

Hi,

Thank you for your interest in NXP Semiconductor products and
for the opportunity to serve you.
Under the same submodule, I'm afraid that PWM_A and PWM_B can't output a pair of PWMs whose frequency is different.

TIC

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Contributor II

Thanks for the information.

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NXP TechSupport
NXP TechSupport

Hi,

Thank you for your interest in NXP Semiconductor products and
for the opportunity to serve you.
Under the same submodule, I'm afraid that PWM_A and PWM_B can't output a pair of PWMs whose frequency is different.

TIC

-------------------------------------------------------------------------------
Note:
- If this post answers your question, please click the "Mark Correct" button. Thank you!

 

- We are following threads for 7 weeks after the last post, later replies are ignored
Please open a new thread and refer to the closed one, if you have a related question at a later point in time.
-------------------------------------------------------------------------------

View solution in original post

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