What should I check?
I mean I will check internal if can give a working configure.
The developer of jetson xavier nx devkit is nvidia.
I bought the nx devkit and then looked at https://www.jetsonhacks.com/2020/05/04/spi-on-jetson-using-jetson-io/, activated spi1, spi3, and did what you asked for.(dt Modification, reg value modification)
nvidia should tell if nx’s loopback test is possible.
I did not develop a carrier board.
That’s what I am going to doing with nvidia developer to check the loopback test configure.
Are you saying you should check with the nvidia developer?
Yes, I am going to check with nvidia developer.
Yes, please answer after checking.
Do you ever need to compile kernel/kernle-4.9/drivers/spi/spi-tegra124-slave.c and load spi-tegra124-slave.ko to use slave on jetson xavier nx?
No, I think it’s build-in kernel module.
Yes thank you.
Please check with the developer and answer, such as slave method and slave mode test method.
@_JJANG
Make below as a script, below is my test pass result.
sudo ./spidev_test -D /dev/spidev2.0 -s8000000 -g512 -b32 -H -p0 -n1 -r &
sleep 5
sudo ./spidev_test -D /dev/spidev0.0 -s8000000 -g512 -b32 -H -p0 -n1 -zzz -t
nvidia@dhcp-10-19-107-152:~$ sh spi1.sh
Disabling receive
using device: /dev/spidev0.0
setting spi mode for read,write
setting spi bpw
setting max speed for rd/wr
spi mode: 1
bits per word: 32 bytes per word: 4
max speed: 8000000 Hz (8000 KHz)
no. runs: 1
Using seed:0x5f894840
loop count = 0
using sequential pattern …
transfer bytes [512]
0000: 00 01 02 03 04 05 06 07 08 09 0A 0B 0C 0D 0E 0F
0010: 10 11 12 13 14 15 16 17 18 19 1A 1B 1C 1D 1E 1F
0020: 20 21 22 23 24 25 26 27 28 29 2A 2B 2C 2D 2E 2F
0030: 30 31 32 33 34 35 36 37 38 39 3A 3B 3C 3D 3E 3F
0040: 40 41 42 43 44 45 46 47 48 49 4A 4B 4C 4D 4E 4F
0050: 50 51 52 53 54 55 56 57 58 59 5A 5B 5C 5D 5E 5F
0060: 60 61 62 63 64 65 66 67 68 69 6A 6B 6C 6D 6E 6F
0070: 70 71 72 73 74 75 76 77 78 79 7A 7B 7C 7D 7E 7F
0080: 80 81 82 83 84 85 86 87 88 89 8A 8B 8C 8D 8E 8F
0090: 90 91 92 93 94 95 96 97 98 99 9A 9B 9C 9D 9E 9F
00A0: A0 A1 A2 A3 A4 A5 A6 A7 A8 A9 AA AB AC AD AE AF
00B0: B0 B1 B2 B3 B4 B5 B6 B7 B8 B9 BA BB BC BD BE BF
00C0: C0 C1 C2 C3 C4 C5 C6 C7 C8 C9 CA CB CC CD CE CF
00D0: D0 D1 D2 D3 D4 D5 D6 D7 D8 D9 DA DB DC DD DE DF
00E0: E0 E1 E2 E3 E4 E5 E6 E7 E8 E9 EA EB EC ED EE EF
00F0: F0 F1 F2 F3 F4 F5 F6 F7 F8 F9 FA FB FC FD FE 00
0100: 01 02 03 04 05 06 07 08 09 0A 0B 0C 0D 0E 0F 10
0110: 11 12 13 14 15 16 17 18 19 1A 1B 1C 1D 1E 1F 20
0120: 21 22 23 24 25 26 27 28 29 2A 2B 2C 2D 2E 2F 30
0130: 31 32 33 34 35 36 37 38 39 3A 3B 3C 3D 3E 3F 40
0140: 41 42 43 44 45 46 47 48 49 4A 4B 4C 4D 4E 4F 50
0150: 51 52 53 54 55 56 57 58 59 5A 5B 5C 5D 5E 5F 60
0160: 61 62 63 64 65 66 67 68 69 6A 6B 6C 6D 6E 6F 70
0170: 71 72 73 74 75 76 77 78 79 7A 7B 7C 7D 7E 7F 80
0180: 81 82 83 84 85 86 87 88 89 8A 8B 8C 8D 8E 8F 90
0190: 91 92 93 94 95 96 97 98 99 9A 9B 9C 9D 9E 9F A0
01A0: A1 A2 A3 A4 A5 A6 A7 A8 A9 AA AB AC AD AE AF B0
01B0: B1 B2 B3 B4 B5 B6 B7 B8 B9 BA BB BC BD BE BF C0
01C0: C1 C2 C3 C4 C5 C6 C7 C8 C9 CA CB CC CD CE CF D0
01D0: D1 D2 D3 D4 D5 D6 D7 D8 D9 DA DB DC DD DE DF E0
01E0: E1 E2 E3 E4 E5 E6 E7 E8 E9 EA EB EC ED EE EF F0
01F0: F1 F2 F3 F4 F5 F6 F7 F8 F9 FA FB FC FD FE 00 01
/dev/spidev2.0: TEST PASSED
/dev/spidev0.0: TEST PASSED
====== Transfer stats ====
Transmit:
total: 512B (0KiB 0MiB)
total: 1P
ioerr: 0B (0KiB 0MiB)
ioerr: 0P
Rate:
wire total: -1B/s (0KB/s)
total: -1B/s (0KB/s)
wire total: -1P/s
total: -1P/s
Total time: 0.007458s
https://forums.developer.nvidia.com/t/how-to-set-to-spi-slave-mode/155310/11?u=_jjang
Was it set up like this link?
Oh oh!! Thank you very much!!
I used the program you gave me in #4.
sudo ./spidev_test -D /dev/spidev2.0 -s8000000 -g512 -b32 -H -p0 -n1 -r &
sleep 5
sudo ./spidev_test -D /dev/spidev0.0 -s8000000 -g512 -b32 -H -p0 -n1 -zzz -t
I entered the command and it was successful!
I changed spi3 to slave and entered the command (the register value was not changed)
spi1 reg value
mosi : 0x444
miso : 0x444
sck : 0x444
cs0 : 0x448
cs1 : 0x448
spi3 reg value
mosi : 0x444
miso : 0x444
sck : 0x444
cs0 : 0x448
cs1 : 0x448
I have a question.
1.
https://github.com/torvalds/linux/blob/master/tools/spi/spidev_test.c
How do I enter a command to use this source code?
Or can you share the source code of the program you gave me?
2.
can’t send spi message: Invalid argument
Aborted (core dumped)
<<<<< dmesg >>>>>>
spi-tegra124-slave 3230000.spi: Tx is not supported in mode 0
spi-tegra124-slave 3230000.spi: spi can not start transfer, err -22
spi_master spi2: failed to transfer one message from queue
Does this error occur when spi mode is 0 or 3?
In the open source of spidev_test, the spi mode was 0 (error occurred) and the program you gave was spi mode 1 (successful).
- Sorry, can’t public the source.
- The master must run first then run the slave.
Thank you so much for letting me know!
I use spidev0.0 for loopback test,
I connected MISO and MOSI, and then used spidev_test to test, but the data I received is always 0
I use devmem viewer value is also as follows
mosi : 0x444
miso : 0x444
sck : 0x444
cs0 : 0x448
cs1 : 0x448
Did you run below command?
sudo ./spidev_test -D /dev/spidev0.0
spi mode: 0
bits per word: 8
max speed: 500000 Hz (500 KHz)
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
DE AD BE EF BA AD
F0 0D
It may be that the version of spidev_test is inconsistent. I made an error when I ran this command.
The version I used was downloaded in topic 4#
Try below command for the binary from 4#
sudo ./spidev_test -D /dev/spidev0.0 -s4000000 -g16 -n10
