topic MPC5748G input in MPC5xxx

MPC5748G input

joãopaulo — Sun, 12 Jul 2020 21:19:01 GMT

Hello,

I have an devkit-mpc5748g and I'd like to read active wheel speed sensor that uses hall sensor.
Which input should I use to read such signal considering it is an high speed square wave and I need to know the signal frequency to know the speed of the wheel.

Thanks in advance

Regards

João

Re: MPC5748G input

PetrS — Mon, 13 Jul 2020 07:08:09 GMT

Hi,

use eMIOS channel configured for Input Period Measurement (IPM) or Single Action Input Capture (SAIC) Modes.

Read more about those mode from device reference Manual.

You can also find some eMIOS examples within S32 design Studio.

BR, Petr

Re: MPC5748G input

joãopaulo — Wed, 15 Jul 2020 18:54:25 GMT

Hello,

As far as I understood is possible to use IPM mode in any GPIO.

It's not a special feature of a group of pins, correct?

Is there an input or driver for quadrature sensor?

Thanks,

Regards

João

Re: MPC5748G input

PetrS — Thu, 16 Jul 2020 08:18:36 GMT

Hi,

eMIOS IPM mode can be used on eMIOS channels Type G and Type H.

See Table 35-3. eMIOS channel configuration of the RM to know which channel it is.

Then check I/O Signal table to know on whcih pin the eMIOS channel is available.

MPC5748G does not offer quad decoder.

BR, Petr