TRK-MPC5604P eTimer Quadrature

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TRK-MPC5604P eTimer Quadrature

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Contributor II

Hello,

I have created a simple setup with the TRK-MPC5604P EVB to test the eTimer quadrature function. The quadrature encoder is a simple rotary encoder I'm rotating it by hand. The encoder quadrature signals are connected to the PA0/PA1 pins. Electrically I'm able to scope the quadrature signal, it looks OK. But the counter does not count.

 

Any hints what is wrong and/or missing?

 

Thank you in advance.

 

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Here is the code:

 

void initAndRunEtimer(void) {

  SIU.PCR[0].R = 0x0103;   // PA0, eTimer_0, ETC[0]
SIU.PCR[1].R = 0x0103;   // PA1, eTimer_0, ETC[1]

 

ETIMER_0.CHANNEL[0].COMP1.R   =0xFFFF;

ETIMER_0.CHANNEL[0].COMP2.R   = 0x0000;

ETIMER_0.CHANNEL[0].LOAD.R     = 0x0000;

ETIMER_0.CHANNEL[0].CNTR.R     = 0x0000;

ETIMER_0.CHANNEL[0].CTRL.R     = 0x8000;

ETIMER_0.CHANNEL[0].CTRL2.R   = 0x0000;

ETIMER_0.CHANNEL[0].CTRL3.R   = 0x0000;

ETIMER_0.CHANNEL[0].STS.R        = 0x0000;

ETIMER_0.CHANNEL[0].INTDMA.R = 0x0000;

ETIMER_0.CHANNEL[0].CMPLD1.R = 0x0000;

ETIMER_0.CHANNEL[0].CMPLD2.R = 0x0000;

ETIMER_0.CHANNEL[0].CCCTRL.R = 0x0000;

ETIMER_0.CHANNEL[0].FILT.R        = 0x0000;

 

ETIMER_0.DREQ[0].R = 0x0000;

ETIMER_0.DREQ[1].R = 0x0000;

ETIMER_0.DREQ[2].R = 0x0000;

ETIMER_0.DREQ[3].R = 0x0000;

ETIMER_0.DREQ[4].R = 0x0000;

ETIMER_0.WDTOH.R   = 0xFFFF;

ETIMER_0.WDTOL.R   = 0xFFFF;

ETIMER_0.ENBL.R      = 0x0001;

}

 

As soon as I rotate the encoder I get the following ETIMER_0.CHANNEL[0].STS Bit Field Values:

    Not Implemented bits[ 15:10 ] = 0

    WDF             bits[  9:9  ] = 1    Event occurred

    RCF             bits[  8:8  ] = 0    No event

    ICF2            bits[  7:7  ] = 0    No event

    ICF1            bits[  6:6  ] = 0    No event

    IEHF            bits[  5:5  ] = 1    Event occurred

    IELF            bits[  4:4  ] = 1    Event occurred

    TOF             bits[  3:3  ] = 0    No event

    TCF2            bits[  2:2  ] = 0    No event

    TCF1            bits[  1:1  ] = 0    No event

    TCF             bits[  0:0  ] = 0    No event

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NXP TechSupport
NXP TechSupport

Hi,

you have to select also proper primary and secondary source in CTRL register.

So with ETIMER_0.CHANNEL[0].CTRL.R = 0x8001 setting it should work.

Regards,

Petr

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NXP TechSupport
NXP TechSupport

Hi,

you have to select also proper primary and secondary source in CTRL register.

So with ETIMER_0.CHANNEL[0].CTRL.R = 0x8001 setting it should work.

Regards,

Petr

View solution in original post

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Contributor II

Thank you for the quick response, Petr! That solved it.

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