Quadrature problem of MPC5744P

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Quadrature problem of MPC5744P

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nathan_
Contributor IV

I need to use the Quadrature module of MPC5744P to decode signals from rotary sensor.

But I can not find any examples for that?

Anyone can share some examples with me ? 

Thanks.

2 Replies

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petervlna
NXP Employee
NXP Employee

Hi,

Please have a look at following thread.

https://community.nxp.com/thread/439351 

Peter

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nathan_
Contributor IV

I had a look at the example you gave to me.

I have a problem:

According to the following code,

quad_cnt = ETIMER_1.CHANNEL[4].CNTR.R; // read quadrature counter

the result can be read from the rigister,but the resigister can only store unsigned short int( 16 bit),

how to read it when the counter goes below zero?

Is there a rule to calculate the quadrature counter?

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