TMDXIDDK379D: Can we interface the position encoder with 3 Hall sensors to TMDXIDDK379D?

Karthik N N

Prodigy 70 points

Part Number: TMDXIDDK379D

HW guide of TMDXIDDK379D says that only these position encoders are supported by the board.

1. QEP
2. Resolver
3. Sin-Cos
4. EnDat / BiSS

By any chance, can we interface the position encoder with 3 Hall sensors to TMDXIDDK379D?

over 4 years ago

0 Ramesh Ramamoorthy over 4 years ago

TI__Mastermind 27240 points

Yes, from a hardware standpoint, QEP and HALL are three signals, so no issues with accommodating HALL feedback.

0 Karthik N N over 4 years ago in reply to Ramesh Ramamoorthy

Prodigy 70 points

Dear Ramesh,

But eQEP and eCAP peripherals are entirely different. Are they compatible with each other? Or Can eQEP be configured as eCAP to capture HALL pulses?

Regards,

Karthik

0 Ramesh Ramamoorthy over 4 years ago in reply to Karthik N N

TI__Mastermind 27240 points

I meant the interface hardware on IDDK. QEP and CAP are different as you know and cannot substitute each other. If you want to capture HALL periods, you do need eCAP inputs and you may have to wire it to those GPIOs accordingly

0 Karthik N N over 4 years ago in reply to Ramesh Ramamoorthy

Prodigy 70 points

Dear Ramesh,

The eCAP pins on TMDXIDDK379D (GPIO 24, 25, 26, 27) are not accessible. Is there any way to access it?

Regards,

Karthik

0 Ramesh Ramamoorthy over 4 years ago in reply to Karthik N N

TI__Mastermind 27240 points

Suggest to look at the device datasheet to find out which other GPIOs the ECAP is pinned out. Generally, these are pinned out on many GPIOs and are not limited to just one GPIO. Hope it helps.

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TMDXIDDK379D: Can we interface the position encoder with 3 Hall sensors to TMDXIDDK379D?