Differences

This shows you the differences between two versions of the page.

--- en:general_information:tutorial:spi [2015/08/17 09:00] – liedmann
+++ en:general_information:tutorial:spi [2025/01/28 11:17] (current) – external edit 127.0.0.1
@@ Line 1: / Line 1: @@
-===== CAN =====
+~~NOCACHE~~
+~~NOTOC~~
+===== SPI =====
 \\
-<WRAP round important 45%>Tested on STKa6x BSP Rev.0104 and BSP Rev.0105</WRAP>
+<WRAP round important 55%>This tutorial was tested on STKa6x BSP with Rev.0104 and BSP Rev.0105</WRAP>
-SPI can be tested on the starterkit with **spidev_test** from the kernel sources\\
+SPI can be tested with **spidev_test** from the kernel sources.\\
-[[http://https://www.kernel.org/doc/Documentation/spi/spidev_test.c]]\\
+[[https://www.kernel.org/doc/Documentation/spi/spidev_test.c]]\\
- **spidev_test** is included in the sd image by default.
+**spidev_test** is included by default in the BSP, you will find it under **/usr/bin/**.
+\\
+==== Testing spidev 0.1 ====
+<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)
-To run the SPI loopback test please put a bridge between **X27_43(SPI1.MOSI)** and **X27_44(SPI1.MISO)** on the starterkit.\\
+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
+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
+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>
+++++