Hi teams
I config the Xavier’s SPI0 as slave mode.Which communication with stm32，
I set STM32’s SPI as master mode.The xavier SPI can receive data from STM32 ,
But can not send data ? it’s why
The spi config of xavier as below:
sudo ./devmem2 0x0243d010 w 0x00000415
sudo ./devmem2 0x0243d020 w 0x00000404
sudo ./devmem2 0x0243d040 w 0x00000444
sudo ./devmem2 0x0243d050 w 0x00000400
sudo ./devmem2 0x0243d058 w 0x00000448
my cmd::
./spidev_test -H 1 -O 1 -s500000 -d1000000 -v -p aaaaaaa
Did you try the loopback test?
Hi ShaneCCC
I did not try the loopback test.
1 How to test it ?
2 The SPI should be use as master or slave while loopback test.
Have check below link. Maybe verify both of master and slave mode to confirm it.
You may need to enable external master/slave loopback.
One for master and one enable as slave and connect them by loopback and run below command.
sudo ./spidev_test -D /dev/spidev2.0 -s8000000 -g512 -b32 -H -p0 -n1 -r &
sleep
sudo ./spidev_test -D /dev/spidev0.0 -s8000000 -g512 -b32 -H -p0 -n1 -zzz -t
Hi ShaneCCC
I have test it.
Xavier1 SPI (/dev/spi0.0) act as master
Xavier2 SPI (/dev/spi0.0) act as slave
connect as below:
Xavier1 Xavier2
SPI1_MOSI----------- SPI1_MOSI
SPI1_MISO----------- SPI1_MISO
SPI1_SCK ----------- SPI1_SCK
SPI1_CS0 ----------- SPI1_CS0
MASTER config:
sudo ./devmem2 0x0243d010 w 0x00000400
sudo ./devmem2 0x0243d020 w 0x00000450
sudo ./devmem2 0x0243d040 w 0x00000400
sudo ./devmem2 0x0243d050 w 0x00000400
sudo ./devmem2 0x0243d058 w 0x00000400
SLAVE config
sudo ./devmem2 0x0243d010 w 0x00000415
sudo ./devmem2 0x0243d020 w 0x00000404
sudo ./devmem2 0x0243d040 w 0x00000444
sudo ./devmem2 0x0243d050 w 0x00000400
sudo ./devmem2 0x0243d058 w 0x00000448
Xavier1
./spidev_test -H -s500000 -v -p 11
sleep .5
Xavier2
./spidev_test -H -s500000 -d1000000 -v -p aa
#sleep 1
The message is sent normally。
1 When I use Xavier2 SPI act as mater ,Xavier 1 SPI act as slave,it can not send,
Does this have anything to do with device tree configuration？
2 I didn’t brush the new SPI driver（Xavier2 spi config: “nvidia,tegra186-spi-slave”）.
Just changed the next pin reuse configuration
Do I need to change the device tree again and then swipe the system？
I think you need to configure Xavier2 as slave mode by add “nvidia,tegra186-spi-slave” in dts.
And need to run the below command in Xavier2 first then run the spidev_test command in Xavier1
sudo ./spidev_test -D /dev/spidev0.0 -s8000000 -g512 -b32 -H -p0 -n1 -r
Hi ShaneCCC
I had test it.
Only the master (Xavier 1)can receive the data. the slave (Xavier 2)can not receive data