Diff: PCA9635.h

Revision:

0:d9cc568daeaf

Child:

1:0a254eb888f1

--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/PCA9635.h	Tue Jun 28 10:03:49 2011 +0000
@@ -0,0 +1,104 @@
+//NXP PCA9635 library
+//mbed Team     -   1st June 2011
+//Ioannis Kedros
+//updated by Daniel Worrall - 28th June 2011
+
+#include "mbed.h"
+
+/** PCA9635 class defined on an I2C master bus
+*
+* Example:
+* @code
+* //Turn each output on and then off in order p0 >> p15
+* //then ramp brightenss up and down at different speeds. 
+* #include "mbed.h"
+* #include "PCA9635.h"
+* 
+* DigitalOut enable(p26);
+* PCA9635 my_driver(p28, p27, 0x02);
+* 
+* int main()
+* {
+*     enable = 0;
+*     
+*     //turns each pin on and then off
+*
+*     short op = 1;
+*     for(char j = 0; j < 16; j++){ 
+*         my_driver.bus(op);
+*         wait(0.7);
+*         op = (op << 1);
+*     }
+* 
+*    //ramp brightness up three times faster than down, repeatedly
+*
+*     while(1)
+*     {
+*         for(char valueUp=0; valueUp<0xFF; (valueUp = valueUp + 3))
+*         {
+*             my_driver.brightness(ALL, valueUp);
+*         }
+*         
+*         for(char valueD=0; valueD<0xFF; valueD++)
+*         {
+*             my_driver.brightness(ALL, (0xFF - valueD));
+*             wait(0.007);
+*         }
+*     }
+* }
+* @endcode
+*/
+
+class PCA9635 {
+        
+    public:
+    /** Create a PCA9635 object, connected to the specified I2C pins 
+    *
+    * @param sda Defines serial data line
+    * @param scl Defines serial clock line
+    * @param addr chip address
+    */
+        PCA9635(PinName sda, PinName scl, int addr);
+        
+        char cmd[2];
+        
+        //Output control
+       
+        /** Set a particular output on PCA9635 high
+        *
+        * @param led LED pin coordinates
+        */
+        void on(char led);
+        /** Reset a particular output on PCA9635 low
+        *
+        * @param led LED pin coordinates
+        */
+        void off(char led);
+        /**Set all pins passed as argument high or low
+        *
+        * @param leds Set output according to parameter value - e.g. 0x0003 >> p0 & p1 high, rest low
+        */
+        void bus(short leds);
+        /** Define LED brightness
+        *
+        * @param led LED pin coordinates
+        * @param value Brightness of LED, 0x00 < value < 0xFF
+        */
+        void brightness(char led, char value);
+        
+        //Reset
+        
+        /** Reset chip 
+        */
+        void reset(void);
+        /** Initialise chip
+        */
+        void init(void);
+        
+              
+    private:
+        I2C m_i2c;
+        int m_addr;
+        
+        #define ALL 0xFF
+};
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