CCM_CLKO2 clock output on MXRT1064

[yamakatb]

Hello,

I am trying to output the clock of CCM_CLKO2 from GPIO_SD_B0_05 on i.MXRT1064.

I set pins and clocks in MCUXpresso Config Tool and implemented them, but I cannot observe the clocks from the pins.

Do I need to set anything other than the following?

pin_mux.c

IOMUXC_SetPinMux(

      IOMUXC_GPIO_SD_B0_05_CCM_CLKO2,         /* GPIO_SD_B0_05 is configured as CCM_CLKO2 */

      0U);                                                                        /* Software Input On Field: Input Path is determined by functionality */

clock_config.c

    /* Set clock out2 divider. */

    CCM->CCOSR = (CCM->CCOSR & (~CCM_CCOSR_CLKO2_DIV_MASK)) | CCM_CCOSR_CLKO2_DIV(2);

    /* Set clock out2 source. */

    CCM->CCOSR = (CCM->CCOSR & (~CCM_CCOSR_CLKO2_SEL_MASK)) | CCM_CCOSR_CLKO2_SEL(18);

    /* Enable clock out2. */

    CCM->CCOSR |= CCM_CCOSR_CLKO2_EN_MASK;

Any help is appreciated, thanks.

T.Y.

[kerryzhou · Accepted solution]

Hi T. Y.,

  Could you please tell me which detail clock you want to output in CCM_CLKO2 from GPIO_SD_B0_05?

  

  I find your code is choose the sai1_clk_root.

   Do you already enable the related clock?

  Please tell me which detail code you want to output, then I will also help you to test it.

Kerry

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[rileya53]

Thanks, your guide. Really helped me.

Relevant clock was not enabled.

Waveform output came as expected;

Thanks.

[kerryzhou]

Hi riley mahi,

  Perfect! I am glad to hear you make it works now.

  If you have any questions in the future, welcome to create the question post, thanks!

Best Regards,

Kerry

[yamakatb]

Hi kerryzhou,

Thank you for helping me,

That is correct.

Did not enable the relevant clock.

Waveform came out as desired!

Best regards,
T.Y.