Differences

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--- en:general_information:tutorial:spi [2015/08/17 10:13] – liedmann
+++ en:general_information:tutorial:spi [2022/08/04 15:02] (current) – external edit 127.0.0.1
@@ Line 1: / Line 1: @@
-===== CAN =====
+~~NOCACHE~~
-<WRAP round important>Tested on STKa6x BSP Rev.0105</WRAP>
+~~NOTOC~~
+===== SPI =====
+\\
+<WRAP round important 55%>This tutorial was tested on STKa6x BSP with Rev.0104 and BSP Rev.0105</WRAP>
+SPI can be tested with **spidev_test** from the kernel sources.\\
+[[https://www.kernel.org/doc/Documentation/spi/spidev_test.c]]\\
+**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)
+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>
+++++