I’m not entirely sure where to start to describe the issue. I would say I’m new to this, but I kinda know my way around, it’s just that all the different pieces haven’t come together in my head. The issue I’m having is that I got a fresh TX2 NX with the OS unmodified. I was going through some forums…

I’m using a custom board. Jetpack 4.6.2 Loop back test doesn’t show anything at all. There’s nothing coming from MOSI. Here’s the log: Blockquote Bank: 1 Reg: 0x70003050 Val: 0x0000e015 → spi1_mosi_pc0 Bank: 1 Reg: 0x70003054 Val: 0x0000e015 → spi1_miso_pc1 Bank: 1 Reg: 0x70003058 Val: 0x000…

It seems the pinmux configured not correctly for SPI usage. Which SPI interface you are using for loopback test? Could you help to provide the flash log of this board for further check?

I’m trying to use SPI0 for an FRAM chip where using, that’s ultimately the one I’m trying to use. SPI1 is the one I’m trying to do the loopback test on because I have access to that through an external connector, which I used a wire to loop MISO and MOSI. Once I’m sure that works, I was going to us…

Is this what you mean? /boot$ journalctl -b | grep pwm Dec 10 05:15:49 worker-node-1 kernel: tegra-pwm 7000a000.pwm: PWM clk cannot sleep in ops Dec 10 05:15:49 worker-node-1 kernel: tegra-dfll-pwm 70110000.pwm: DFLL pwm-rate: 12800000 Dec 10 05:15:49 worker-node-1 kernel: tegra-dfll-pwm 7011000…

[image] SterlingArcher: I’m referring to SPI0 and SPI1 from the Jetson datasheet, the actual device name may be different because I noticed a difference in naming conventions when it comes to device tree and etc on occasion. Yes, please refer to the pinmux table of TX2 to check which SPI inte…

It looks like the pinmux may not be configured correctly. It says that this pinmux file is the default dtb that comes with the system and SPI1, which is SPI2 in the SFIO0 column. [Screenshot 2023-05-01 144157] SPI0 is the other port I’m trying to get working which I can’t do a loop back test beca…

If I look at dmesg I can see this dts file it’s using if that helps. [Screenshot 2023-05-01 151025]

[image] SterlingArcher: It looks like the pinmux may not be configured correctly Yes, both of your SPI0 and SPI1 are not configured for SPI usage. Is this custom board designed by you or you just bought them from the vendor? [image] SterlingArcher: I would prefer to not re-flash it I…

I designed it yes. It’s my first attempt so I’m trying to navigate this whole thing. Slowly getting it though. I’m modifying the spreadsheet and I’m wondering if the pin directions are configured correctly now? [Screenshot 2023-05-02 121442] I decided to flash the board and backup the files. Try…

You could check if the pinmux register of SPI2 related pins again with the previous command.

Spidev shows up in devices, but no MOSI or CS activity when attempting to transmit

Robotics & Edge Computing Jetson Systems Jetson TX2

SterlingArcher May 16, 2023, 12:51pm 22

I’ll start a new topic, sorry about that.

Spi pinmux changes not being implemented when compiling kernel on Jetson Nano - Jetson & Embedded Systems / Jetson Nano - NVIDIA Developer Forums

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Spidev shows up in devices, but no MOSI or CS activity when attempting to transmit

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