InetrfaceProducts NXP / Mbed 2 deprecated PCA9956A_simple

very simple sample code for PCA9956A (24 channel current control LED driver)

Dependencies:   mbed

Fork of PCA9955_simple by InetrfaceProducts NXP

Files at this revision

API Documentation at this revision

Revision 1:2a3b314f4996, committed 2013-10-07

Comitter:
nxp_ip
Date:
Mon Oct 07 04:03:57 2013 +0000
Parent:
0:3afedead559b
Commit message:
modified to control PCA9956A (24 channel constant current LED controller)

Changed in this revision

main.cpp Show annotated file Show diff for this revision Revisions of this file 
--- a/main.cpp	Wed Oct 10 00:48:16 2012 +0000
+++ b/main.cpp	Mon Oct 07 04:03:57 2013 +0000
@@ -7,19 +7,22 @@
 
 #include "mbed.h"
 
-#define     PCA9955_ADDRESS     0xC0
+#define     PCA9956A_ADDRESS    0x02
+#define     IREF_INIT           0x10
 
 I2C     i2c( p28, p27 );
 
 char    init_array[] = {
     0x80,                                           //  Command
     0x00, 0x05,                                     //  MODE1, MODE2
-    0xAA, 0xAA, 0xAA, 0xAA,                         //  LEDOUT[3:0]
+    0xAA, 0xAA, 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]
+    0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, //  PWM[23:16]
+    IREF_INIT, IREF_INIT, IREF_INIT, IREF_INIT, IREF_INIT, IREF_INIT, IREF_INIT, IREF_INIT, //  IREF[7:0]
+    IREF_INIT, IREF_INIT, IREF_INIT, IREF_INIT, IREF_INIT, IREF_INIT, IREF_INIT, IREF_INIT, //  IREF[15:8]
+    IREF_INIT, IREF_INIT, IREF_INIT, IREF_INIT, IREF_INIT, IREF_INIT, IREF_INIT, IREF_INIT, //  IREF[23:16]
     0x08                                            //  OFFSET: 1uS offsets
 };
 
@@ -29,19 +32,18 @@
     char    data[ 2 ];
     int     i   = 0;
 
-    i2c.write( PCA9955_ADDRESS, init_array, sizeof( init_array ) );
+    i2c.write( PCA9956A_ADDRESS, init_array, sizeof( init_array ) );
 
     while ( 1 ) {
-        if ( !(i & 0xFFF) ) {
-            data[ 0 ]   = 0x42;
+        if ( !(i % (256 * 24)) ) {
+            data[ 0 ]   = 0x3F;
             data[ 1 ]   = 0x00;
-            i2c.write( PCA9955_ADDRESS, data, 2 );
+            i2c.write( PCA9956A_ADDRESS, data, 2 );
 
         } else {
-            data[ 0 ]   = 0x0A + ((i >> 8) & 0xF);
+            data[ 0 ]   = 0x0A + ((i >> 8) % 24);
             data[ 1 ]   = i & 0xFF;
-            i2c.write( PCA9955_ADDRESS, data, 2 );
-
+            i2c.write( PCA9956A_ADDRESS, data, 2 );
         }
         wait_ms( 1 );
         i++;