demoboard | Demoboard live code editor | Editor library
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kandi X-RAY | demoboard Summary
An embeddable live editor, with every package on npm.
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QUESTION
I am currently working on an SPI communication between an NXP LPC55S06 processor (from the LPC55S06-EVK demoboard) and an NXP CLRC663.
I integrated the NXP NFC library to initialize the CLRC663 and configured the SPI pinouts in the .mex file. I have done my wiring and can verify the sending of SPI commands:
My problem is that the CLRC663 never responds to the commands I send it.
I have already checked my wiring several times and I think the problem is software. Since the problem can neither come from the NFC lib nor from the FSL drivers specific to the LPC55S06 processor, I suspect that it would come from the SPI configuration done by this code (called by the NFC lib):
...ANSWER
Answered 2021-Jul-21 at 06:34I found out what my problem was. Here is how my reset was implemented:
HIGH - wait 20ms - LOW - wait 20ms - HIGH
In this document it is mentioned: "A hard power-down is enabled with HIGH level on pin PDOWN. ... To leave the power-down mode the level at the pin PDOWN as to be set to LOW."
However, I had to do the opposite and since I kept the reset pin at HIGH, the CLRC663 could not start, so it did not respond.
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