Differences

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--- en:spi_dot_matrix [2016/12/09 11:29]
charles.park [SPI Dot-Matrix]
+++ en:spi_dot_matrix [2017/06/16 14:05] (current)
odroid [Example of Scrolling Text]
@@ Line 123: / 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 201: / Line 203: @@
 ==== Example of Scrolling Text ====
+<WRAP round important 100%>
+<color #00a2e8>**WiringPi SPI API**</color> use case :
+Uncomment this line first.
+#define USE_WIRING_PI_LIB
+Build the example with proper library option.
+if defined USE_WIRING_PI_LIB
+      Compile : gcc -o <create excute file name> <source file name> -lwiringPi -lwiringPiDev -lpthread
+else
+      Compile : gcc -o <create excute file name> <source file name>
+</WRAP>
 <code>
 gcc -o dot_test dot_shift_test.c
@@ Line 351: / Line 368: @@
 {
     struct spi_ioc_transfer tr;
+    memset((void *)&tr, 0x00, sizeof(tr));
     tr.tx_buf           = (unsigned long)buf;