Diff: PCA9672.h

Revision:

0:9aab4157fdae

diff -r 000000000000 -r 9aab4157fdae PCA9672.h
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/PCA9672.h	Sun Nov 24 12:34:47 2013 +0000
@@ -0,0 +1,54 @@
+#ifndef PCA9672_H
+#define PCA9672_H
+ 
+#include "mbed.h"
+ 
+//  PCA9672 IIC slave address
+#define  PCA9672_ADDR 0x46
+ 
+ 
+//!Library for the PCA9672 I/O expander.
+/*!
+The PCA9672 is an I2C I/O expander. It has 8 I/O pins.
+*/
+class PCA9672
+{
+public:
+  /*!
+  Connect PCA9672 to I2C port pins sda and scl.
+  */
+  PCA9672(PinName sda, PinName scl);
+  
+  /*!
+  Set the frequency of the I2C interface.
+  */
+  void frequency(int hz);
+ 
+  /*!
+  Setup pin direction (bit = 1 for inputs, 0 for outputs)
+  */
+  void direction(uint8_t inputs);
+  
+  /*!
+  Write the value to the IO Expander (pins XP0-XP7 output)
+  */
+  void write(char value);
+  
+  /*!
+  Read the value of the IO Expander (pins XP0-XP7 input)
+  */
+  int read(void);
+    
+  /*!
+  Destroys instance.
+  */ 
+  ~PCA9672();
+  
+private:
+  
+  I2C _i2c;
+  uint8_t _pins;
+ 
+};
+ 
+#endif
\ No newline at end of file