Infineon GPT12 Training page 7

Pwm generation 1 for kit_aurix_tc297_tft

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Implementation

Reload Values calculation example

Calculating the correct reload value to generate a PWM signal, depending on the given

frequency f and duty cycle, is done in the initialization function initGpt12PWM():

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Get the GPT12 module base frequency ��

IfxGpt12_getModuleFrequency()

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Calculate the timer frequency with the following formula:

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The GPT1 block prescaler is set to

The timer prescaler is set to

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Calculate dutyUpTime and dutyDownTime with the following formulas:

�� =

2020-06-05

GPT1_BLOCK_PRESCALER × TimerInputPrescaler

IfxGpt12_Gpt1BlockPrescaler_32,

IfxGpt12_TimerInputPrescaler_32,

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100

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by calling the iLLD function

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�� =

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is divided by 32

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is divided by 32

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× 1 −

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100