Differences

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--- en:xu3_hardware_spi [2015/08/22 12:31]
charles.park
+++ en:xu3_hardware_spi [2016/12/24 12:15] (current)
odroid [Reading the SPI Flash device ID on Expansion-Board]
@@ Line 3: / Line 3: @@
 ===== Reading the SPI Flash device ID on Expansion-Board =====
 To use spidev on your **ODROID-XU3** you should fix device tree source.
-=== How to fix device tree blob with command line ===
-Install device tree compiler package.
-  sudo apt-get install device-tree-compiler
-Edit dtb file.
+<WRAP center round important 100%>
+To use the SPI, you first need to update the kernel version to "3.10.82" or higher.
+  sudo apt-get update && sudo apt-get dist-upgrade
+</WRAP>
+<WRAP center round important 100%>
+SPI MODE 3 doesn't work by unknown reason. Please try to use the SPI MODE 0.
+</WRAP>
+=== How to enable driver (Only Ubuntu 16.04 or higher is required) ===
+Edit /etc/modprobe.d/blacklist-odroid.conf to comment out following two ines.
 <code>
-sudo -s
+blacklist spidev
-fdtput -c /media/boot/exynos5422-odroidxu3.dtb /spi@12d30000/spidev
+blacklist spi_s3c64xx
-fdtput -t s /media/boot/exynos5422-odroidxu3.dtb /spi@12d30000/spidev compatible "spidev"
-fdtput -t x /media/boot/exynos5422-odroidxu3.dtb /spi@12d30000/spidev reg 0
-fdtput -t i /media/boot/exynos5422-odroidxu3.dtb /spi@12d30000/spidev spi-max-frequency 20000000
-fdtput -c /media/boot/exynos5422-odroidxu3.dtb /spi@12d30000/spidev/controller-data
-fdtput -t x /media/boot/exynos5422-odroidxu3.dtb /spi@12d30000/spidev/controller-data cs-gpio 0x44, 0x5, 0x0
-fdtput -t x /media/boot/exynos5422-odroidxu3.dtb /spi@12d30000/spidev/controller-data samsung,spi-feedback-delay 0
 </code>
@@ Line 34: / Line 35: @@
 34 34 34
 </code>
+If you tie the MOSI and MISO pins, the output is "AB 00 00 00".\\
+We call it loopback test.
 <file c spidev_test.c>
 /*
@@ Line 158: / Line 163: @@
 }
 </file>
+**If you want to use 16bit/32bit length protocol with different SPI speed on XU4, refer this [[en:c1_hardware_spidev|c1_hardware_spidev]].**