How do I sample the midpoint of a motor current with an adc

[drfrefw123]

Hello everyone

I am using s32k342,I configured the external rising edge trigger ADC sampling.

Now I want to sample the motor current with a little time lag on the rising edge, roughly at the position of the pwm midpoint, how to configure it?

[petervlna · Accepted solution]

Hello,

This depend on how you generate PWM signals.

1. FlexPWM, you can use LCU to delay the measurement.

2. eMIOS - here you can use the free channel on the group which is generating PWM. You will have a synchronous 7-8 channels with same time base.

You can refer to Application note:

https://www.nxp.com/webapp/Download?colCode=AN13884

Best regards,

Peter