Differences

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--- en:xu3_hardware_spi [2016/08/29 18:18]
odroid [Reading the SPI Flash device ID on Expansion-Board]
+++ en:xu3_hardware_spi [2016/12/24 12:15] (current)
odroid [Reading the SPI Flash device ID on Expansion-Board]
@@ Line 13: / Line 13: @@
 </WRAP>
-=== How to fix device tree blob with command line ===
+=== How to enable driver (Only Ubuntu 16.04 or higher is required) ===
-Install device tree compiler package.
+Edit /etc/modprobe.d/blacklist-odroid.conf to comment out following two ines.
-  sudo apt-get install device-tree-compiler
-Edit dtb file.
 <code>
-sudo -s
+blacklist spidev
-fdtput -t x /media/boot/exynos5422-odroidxu3.dtb /spi@12d30000 samsung,spi-src-clk 0
+blacklist spi_s3c64xx
-fdtput -t x /media/boot/exynos5422-odroidxu3.dtb /spi@12d30000 num-cs 0
-fdtput -c /media/boot/exynos5422-odroidxu3.dtb /spi@12d30000/spidev
-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 0x46, 0x5, 0x0
-fdtput -t x /media/boot/exynos5422-odroidxu3.dtb /spi@12d30000/spidev/controller-data samsung,spi-feedback-delay 0
 </code>
@@ Line 46: / 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>
 /*