I have an odd problem with the Jetson Nano dev kit. I’ve tried to enable pull-ups and pull-downs on the SPI1 CS0
(24) and CS1 pins (26) on the 40-pin connector. With my multimeter I can measure with 0 V or 3.3 V.
Initially I had the pull-ups set and then connected a on-off-on switch from 24 and 26 to ground. I can then use:
sudo gpiomon gpiochip0 19 20
I can see the pin go low, but it never goes high. If I disconnect my jumpers and use my multimeter, the pin is now 0V instead of 3.3V. So it appears the pull-ups stopped working. I got frustrated with this so I build the following wire harness:
So I now have pull-ups and pull-downs. I can now get the Jetson to see the rising edge, but not the falling edge.
- Board: Author: Raffaello Bonghi * Name: NVIDIA Jetson NANO/TX1 e-mail: firstname.lastname@example.org * Type: NANO/TX1 * Jetpack: 4.2.2 [L4T 32.2.1] * GPU-Arch: 5.3 * SN: 142211907582008080FF - Libraries: * CUDA: 10.0.326 * cuDNN: 126.96.36.199-1+cuda10.0 * TensorRT: 188.8.131.52-1+cuda10.0 * VisionWorks: 184.108.40.2060n * OpenCV: 3.3.1 compiled CUDA: NO