OrangePi One Plus (H6) - SPI Enabled but not communicating.


Nyx_
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Go to solution Solved by martinayotte,

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Armbianmonitor:

Hello. Good day.

 

I'm trying to use the SPI on a OragenPI One Plus (Allwinner H6), and, although I have enable it via the /boot/armbianEnv.txt configuration, communication is not working.

 

Here's the armbianEnv.txt

armbian@orangepioneplus:~$ cat /boot/armbianEnv.txt
verbosity=1
bootlogo=false
console=both
disp_mode=1920x1080p60
overlay_prefix=sun50i-h6
rootdev=UUID=19c1886e-0b74-45b8-b9f5-5fbd4bdeb5c2
rootfstype=ext4
overlays=spi-spidev
param_spidev_spi_bus=0
usbstoragequirks=0x2537:0x1066:u,0x2537:0x1068:u

 

And here's the SPI device listed under /dev

armbian@orangepioneplus:~$ ls -la /dev/sp*
crw------- 1 root root 153, 0 nov 28 15:06 /dev/spidev0.0

 

To test it, I compiled the spidev_test.c (https://github.com/rm-hull/spidev-test) and I jumped the MISO and MOSI pins on the board.

 

This is the response I'm getting when running the spidev_test:

armbian@orangepioneplus:~/spidev-test$ sudo ./spidev_test -v
spi mode: 0x0
bits per word: 8
max speed: 500000 Hz (500 KHz)
TX | FF FF FF FF FF FF 40 00 00 00 00 95 FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF F0 0D  | ......@....�..................�.
RX | 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00  | ................................

 

I tested it with both a Downloaded image from Armbian website as well as one that I built. Both behave the same way.

 

To make sure this isn't a Hardware issue, I did the same test the a image from the OrangePi website. It worked fine.

 

I'm running kernel 5.9.11. Searching on dmesg from SPI doesn't bring much. Here's it in any case:

armbian@orangepioneplus:~/spidev-test$ dmesg | grep spi
[    2.693934] spidev spi0.0: probing from DT

 

Any ideas where I can look next to solve the problem?
I appreciate any suggestion/advice.

 

Thank you.

 

 

 

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  • Solution
On 11/28/2020 at 3:14 PM, Nyx_ said:

Any ideas where I can look next to solve the problem?
I appreciate any suggestion/advice.

After hours of investigation, and after having figured out that SPI for H6 wasn't working since 5.7.x, I've found why : missing SPI pins in DT ...

 

https://github.com/armbian/build/commit/e3ade9e9f4292c6b257ad10f676edc4055106d2a

 

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19 hours ago, martinayotte said:

After hours of investigation, and after having figured out that SPI for H6 wasn't working since 5.7.x, I've found why : missing SPI pins in DT ...

 

https://github.com/armbian/build/commit/e3ade9e9f4292c6b257ad10f676edc4055106d2a

 

Wow Martin! Thanks for the investigation and solution.
I'll build a new version incorporating those changes and It will probably work. I'll reply the results here.

Thank you very much.

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Yep.

 

Just confirming that it's working, building from sources.

 

armbian@orangepioneplus:~/spidev-test$ sudo ./spidev_test -v
[sudo] password for armbian:
spi mode: 0x0
bits per word: 8
max speed: 500000 Hz (500 KHz)
TX | FF FF FF FF FF FF 40 00 00 00 00 95 FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF F0 0D  | ......@....�..................�.
RX | FF FF FF FF FF FF 40 00 00 00 00 95 FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF F0 0D  | ......@....�..................�.

 

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I see the same behavior on OrangePi 3 and I'm wondering if there might be a similar fix needed for this board.
@martinayotte maybe?

/boot/armbianEnv.txt

verbosity=1 console=both overlay_prefix=sun50i-h6 overlays=spi-spidev1 param_spidev_spi_bus=1 rootdev=UUID=b9dd15a3-53c5-44e1-96ed-816ea6eb4967 rootfstype=ext4 usbstoragequirks=0x2537:0x1066:u,0x2537:0x1068:u

Working with this kernel:

uname -a

Linux magicsky 5.4.88-sunxi64 #21.02.3 SMP Mon Mar 8 08:07:33 UTC 2021 aarch64 GNU/Linux

But not with latest buster 5.10.

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