I’m trying to use an A/D HAT on the 40-pin connector with the SPI interface but I cannot read any data. I’ve tried this on both the JP6 and JP 5.1.3 to no avail. This A/D HAT works without issue on the Raspberry Pi 5 and Jetson Nano but the MISO line looks like it’s being pulled low on the Jetson Orin Nano board. The CS, SCLK, and MOSI lines are working as I would expect with a clock rate of 200kHz.
Jetson Orin Nano JP-5.1.3 No MISO data
Jetson Nano (working)
Hi rfenlon,
How did you port A/D HAT on Jetson device?
(i.e. which driver you are using)
Have you verified SPI loopback test by shorting MISO and MOSI to check if it works as expected?
Please let us know which SPI interface you are using and how did you configure them.
MISO is the input for Jetson.
I would suggest you check its pinmux register first and also check from your SPI device side.
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