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Asked: 2022-07-30T11:42:17+05:30 In:

GTM_TIM_Capture_1 example with different input pin

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I went through the example and verify the signal and varying different frequencies and it works perfectly fine for my eval TC37x board

I then tried to change the input pin to #define PWM_IN IfxGtm_TIM1_1_P02_1_IN with the expectation if I changed the CMU_CLKEN_CLK1, I will get the same result

IfxGtm_Cmu_enableClocks(&MODULE_GTM, IFXGTM_CMU_CLKEN_CLK1); /* Enable the CMU clock 1 */

But my g_measuredPwmFreq_Hz = +Inf

and g_measuredPwmDutyCycle = NaN

The data sheet calls out the CMU_CLK0, CMU_CLK1, CMU_CLK6, CMU_CLK7 are used for the TIM filters counters.

What did I do wrong or assume changing the input pin to TIM1 and enable the CLK1 will not work in this case?

CLK1input pinTC37xboardTIM1
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    1 Answer

    1. In the example, inside the function IfxGtm_Tim_In_initConfig(), the configuration is for TIM0 CH0 config->timIndex = IfxGtm_Tim_0;config->channelIndex = IfxGtm_Tim_Ch_0; IfxGtm_TIM1_1_P02_1_IN corresponds to TIM1 CH1.

      In the example, inside the function IfxGtm_Tim_In_initConfig(), the configuration is for TIM0 CH0

      config->timIndex = IfxGtm_Tim_0;
      config->channelIndex = IfxGtm_Tim_Ch_0;

      IfxGtm_TIM1_1_P02_1_IN corresponds to TIM1 CH1.

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