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en:general_information:tutorial:spi [2015/08/17 11:01] – liedmannen:general_information:tutorial:spi [2017/06/22 11:24] – liedmann
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 +~~NOCACHE~~
 +~~NOTOC~~
 ===== SPI ===== ===== SPI =====
 \\ \\
Line 5: Line 7:
 SPI can be tested with **spidev_test** from the kernel sources.\\  SPI can be tested with **spidev_test** from the kernel sources.\\ 
 [[https://www.kernel.org/doc/Documentation/spi/spidev_test.c]]\\ [[https://www.kernel.org/doc/Documentation/spi/spidev_test.c]]\\
-You will find **spidev_test** in our BSP under **/usr/bin/**.+**spidev_test** is included by default in the BSP, you will find it under **/usr/bin/**.
 \\ \\
 ==== Testing spidev 0.1 ==== ==== Testing spidev 0.1 ====
  
-spidev_test is a loopback test to use it on the starterkit please put a bridge between **X27_43 (SPI.MOSI)** and **X27_44 (SPI.MISO)**.+<wrap Round info 65%>spidev_test is a loopback test, to use it on the Starterkit put a bridge between the pins **X27_43 (SPI1.MOSI)** and **X27_44 (SPI1.MISO)**.</wrap>
  
 +To run spidev with /dev/spi0.1 you need to specify the device with -D parameter
 +<code>
 +root@MBa6x:cd /usr/bin
 +root@MBa6x:/usr/bin ./spidev_test -D /dev/spidev0.1
 +</code>
 +
 +
 +++++console output with open bridge:| 
 +<code>
 +root@MBa6x:/usr/bin ./spidev_test -D /dev/spidev0.1
 +spi mode: 0
 +bits per word: 8
 +max speed: 500000 Hz (500 KHz)
 +
 +FF FF FF FF FF FF
 +FF FF FF FF FF FF
 +FF FF FF FF FF FF
 +FF FF FF FF FF FF
 +FF FF FF FF FF FF
 +FF FF FF FF FF FF
 +FF FF 
 +</code>
 +++++
 +++++ console output with closed bridge:| 
 +<code>
 +root@MBa6x:/usr/bin ./spidev_test -D /dev/spidev0.1
 +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
 +</code>
 +++++
 +==== Testing spidev 4.0 ====
 +
 +<wrap Round info 65%>spidev_test is a loopback test, to use it on the starterkit put a bridge between the pins **X28_51 (ECSPI5.MIS0)** and **X28_53 (ECSPI5.MOSI)**.</wrap>
 +
 +To run spidev with /dev/spi4.0 you need to specify the device with -D parameter 
 +<code>
 +root@MBa6x:cd /usr/bin
 +root@MBa6x:/usr/bin ./spidev_test -D /dev/spidev4.0
 +</code>
 +++++console output with open bridge:| 
 +<code>
 +root@MBa6x:/usr/bin ./spidev_test -D /dev/spidev4.0
 +spi mode: 0
 +bits per word: 8
 +max speed: 500000 Hz (500 KHz)
 +
 +FF FF FF FF FF FF
 +FF FF FF FF FF FF
 +FF FF FF FF FF FF
 +FF FF FF FF FF FF
 +FF FF FF FF FF FF
 +FF FF FF FF FF FF
 +FF FF 
 +</code>
 +++++
 +++++ console output with closed bridge:| 
 +<code>
 +root@MBa6x:/usr/bin ./spidev_test -D /dev/spidev4.0
 +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
 +</code>
 +++++
  • Last modified: 2022/08/04 15:02