Differences

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

--- en:spi_dot_matrix [2016/01/25 10:16]
john1117 [SPI Dot-Matrix]
+++ en:spi_dot_matrix [2017/01/18 17:13]
charles.park [Example of Scrolling Text]
@@ Line 5: / Line 5: @@
-<WRAP center round info 100%>
+<WRAP center round important 100%>
 To use the SPI, you first need to update the kernel version to "3.10.82" or higher.
-<code>sudo apt-get update && sudo apt-get dist-upgrade
+  sudo apt-get update && sudo apt-get dist-upgrade
-uname -r
-.10.82
-</code>
 </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 35: / Line 21: @@
 Check your SPI node.
   ls /dev/spidev*
 ==== Compile & run SPI test example source code ====
@@ Line 136: / Line 123: @@
     struct spi_ioc_transfer tr;
+    memset((void *)&tr, 0x00, sizeof(tr));
     tr.tx_buf = (unsigned long)tx;
     tr.rx_buf = (unsigned long)rx;
@@ Line 364: / Line 353: @@
 {
     struct spi_ioc_transfer tr;
+    memset((void *)&tr, 0x00, sizeof(tr));
     tr.tx_buf           = (unsigned long)buf;