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--- en:c2_dotmatrix [2016/03/14 14:56]
ck.kim [How to use SPI on ODROID-C2]
+++ en:c2_dotmatrix [2016/03/14 15:22] (current)
odroid [How to use SPI on ODROID-C2]
@@ Line 5: / Line 5: @@
 <WRAP  left round important 100%>
 Since the C2 doesn't support Hardware SPI. This Example is using the GPIO-based bitbanging SPI Master.\\
-In this case, the maximum clock is about 350KHz.
+In this case, the maximum clock is about 390KHz.\\
+Update the Kernel first. This module drivers are available on 3.14.29-32 or higher.\\
 </WRAP>\\
@@ Line 30: / Line 32: @@
 ==== Compile & run SPI test example source code ====
 <code>
-$ gcc -o dot_test dot_test.c
+odroid@odroid64:~$ gcc -o dot_test dot_test.c
 </code>
 <code>
-odroid@odroid:~$ sudo ./dot_test
+odroid@odroid64:~$ sudo ./dot_test
 spi mode: 0
 bits per word: 8
 max speed: 500000 Hz (500 KHz)
 </code>
+<WRAP  left round important 100%>
+Set to 500 KHz, but it is actually operating at 390KHz.
+</WRAP>\\
 <file c dot_test.c>
@@ Line 204: / Line 210: @@
 <code>
-$ gcc -o dot_shift_test dot_shift_test.c
+odroid@odroid64:~$ gcc -o dot_shift_test dot_shift_test.c
 </code>
 <code>
-odroid@odroid:~$ sudo ./dot_shift_test
+odroid@odroid64:~$ sudo ./dot_shift_test
 max speed: 1000000 Hz (1000 KHz)
 </code>