Diff: PCA9955.h

Revision:

0:2e6f5ac1b29b

--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/PCA9955.h	Fri Aug 10 01:39:02 2012 +0000
@@ -0,0 +1,161 @@
+/** PCA9955 constant current LED driver control library
+ *
+ *  @class   PCA9955
+ *  @author  NXP Semiconductors Japan
+ *  @version 0.5(15-Jun-2011) (publish 10-Aug-2012)
+ *
+ *  Copyright: 2011 NXP Semiconductors
+ *  Released under the MIT License: http://mbed.org/license/mit
+ *  This is a library that controls PCA9955 a constant current LED driver
+ *  Example:
+ *  @code
+ *  #include    "mbed.h"
+ *  #include    "PCA9955.h"
+ *
+ *  #define     MAX_IREF    0x20
+ *
+ *  PCA9955     led_driver( p28, p27, 0xC0 );  // making an instance of PCA9955
+ *
+ *  main()
+ *  {
+ *      char    v[ 16 ] = { 0xFF };
+ *      int     sel;
+ *
+ *      srand( 0 );
+ *
+ *      led_driver  = 0xFFFF;
+ *      led_driver.set_all_intensity( v );              //  PWM
+ *      led_driver.set_all_intensity( MAX_IREF, true ); //  IREF
+ *
+ *      while ( 1 ) {
+ *          for ( sel = 0; sel < 16; sel++ ) {
+ *              v[ sel ]  = (char)((float)(v[ sel ]) * 0.8);
+ *          }
+ *
+ *          v[ rand() % 16 ]  = 0xFF;
+ *
+ *          led_driver.set_all_intensity( v );              //  PWM
+ *          wait( 0.05 );
+ *      }
+ *  }
+ *  @endcode
+ */
+
+#ifndef     MBED_PCA9955
+#define     MBED_PCA9955
+
+#include    "mbed.h"
+
+//  PCA9955 I2C address
+
+#if 0
+#define     PCA9955_ADDR            0xC0
+
+#define     PCA9955_INIT_PWM        0xFF
+#define     PCA9955_N_OF_PORTS      16
+
+#define     AUTO_INCREMENT           0x80
+#define     REGISTER_START           0x00
+#define     LEDOUT_REGISTER_START    0x02
+#define     PWM_REGISTER_START       0x0A
+#define     IREF_REGISTER_START      0x22
+#endif
+
+class PCA9955 {
+public:
+    PCA9955( PinName I2C_sda, PinName I2C_scl, char I2C_address );
+    void set_single_individual_intensity( char port, char val, int iref = false );
+    void set_all_intensity( char *p, int iref = false );
+    void set_all_intensity( char val, int iref = false );
+    void get_all_intensity( char *p, int iref = false );
+    void operator=( int c );
+    unsigned short fault_test( void );
+
+private:
+
+    enum {
+        PCA9955_ADDR            = 0xC0,
+    };
+
+    enum {
+        PCA9955_INIT_PWM        = 0xFF,
+        PCA9955_N_OF_PORTS      = 16,
+    };
+
+    typedef enum {
+        MODE1   = 0x00,
+        MODE2,
+        LEDOUT0,
+        LEDOUT1,
+        LEDOUT2,
+        LEDOUT3,
+        GRPPWM  = 0x08,
+        GRPFREQ,
+        PWM0    = 0x0A,
+        PWM1,
+        PWM2,
+        PWM3,
+        PWM4,
+        PWM5,
+        PWM6,
+        PWM7,
+        PWM8,
+        PWM9,
+        PWM10,
+        PWM11,
+        PWM12,
+        PWM13,
+        PWM14,
+        PWM15,
+        IREF0   = 0x22,
+        IREF1,
+        IREF2,
+        IREF3,
+        IREF4,
+        IREF5,
+        IREF6,
+        IREF7,
+        IREF8,
+        IREF9,
+        IREF10,
+        IREF11,
+        IREF12,
+        IREF13,
+        IREF14,
+        IREF15,
+        OFFSET  = 0x3A,
+        SUBADR1,
+        SUBADR2,
+        SUBADR3,
+        ALLCALLADR,
+        RESERVED1,
+        RESERVED2,
+        RESERVED3,
+        PWMALL,
+        IREFALL,
+        EFLAG0,
+        EFLAG1,
+
+        REGISTER_START          = MODE1,
+        LEDOUT_REGISTER_START   = LEDOUT0,
+        PWM_REGISTER_START      = PWM0,
+        IREF_REGISTER_START     = IREF0,
+    }
+    command_reg;
+
+    enum {
+        AUTO_INCREMENT          = 0x80,
+    };
+
+
+    I2C         i2c;
+    char        i2c_addr;
+    static char init_array[];
+    void        write( char *data, int length );
+    void        write( command_reg reg_addr, char data );
+    void        read( command_reg reg_addr, char *data, int length );
+    char        read( command_reg reg_addr );
+}
+;
+
+#endif  //  MBED_PCA9955