InetrfaceProducts NXP
/
PCA9956A_simple
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PCA9955_simple
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InetrfaceProducts NXP
Diff: main.cpp
- Revision:
- 0:3afedead559b
- Child:
- 1:2a3b314f4996
--- /dev/null Thu Jan 01 00:00:00 1970 +0000
+++ b/main.cpp Wed Oct 10 00:48:16 2012 +0000
@@ -0,0 +1,50 @@
+/*
+ * very simple sample code for PCA9955 LPD driver
+ *
+ * 10-Oct-2012
+ * NXP Semiconductors - Interface Products
+ */
+
+#include "mbed.h"
+
+#define PCA9955_ADDRESS 0xC0
+
+I2C i2c( p28, p27 );
+
+char init_array[] = {
+ 0x80, // Command
+ 0x00, 0x05, // MODE1, MODE2
+ 0xAA, 0xAA, 0xAA, 0xAA, // LEDOUT[3:0]
+ 0x80, 0x00, // GRPPWM, GRPFREQ
+ 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, // PWM[7:0]
+ 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, // PWM[15:8]
+ 0x10, 0x10, 0x10, 0x10, 0x10, 0x10, 0x10, 0x10, // IREF[7:0]
+ 0x10, 0x10, 0x10, 0x10, 0x10, 0x10, 0x10, 0x10, // IREF[15:8]
+ 0x08 // OFFSET: 1uS offsets
+};
+
+
+int main()
+{
+ char data[ 2 ];
+ int i = 0;
+
+ i2c.write( PCA9955_ADDRESS, init_array, sizeof( init_array ) );
+
+ while ( 1 ) {
+ if ( !(i & 0xFFF) ) {
+ data[ 0 ] = 0x42;
+ data[ 1 ] = 0x00;
+ i2c.write( PCA9955_ADDRESS, data, 2 );
+
+ } else {
+ data[ 0 ] = 0x0A + ((i >> 8) & 0xF);
+ data[ 1 ] = i & 0xFF;
+ i2c.write( PCA9955_ADDRESS, data, 2 );
+
+ }
+ wait_ms( 1 );
+ i++;
+ }
+}
+