Diff: PCF8574_DataBus.h

Revision:

0:2467aed99127

--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/PCF8574_DataBus.h	Wed Aug 31 19:45:31 2011 +0000
@@ -0,0 +1,45 @@
+/* PCF8574_DataBus - Use the PCF8574 I2C Port Extender for controlling the Data Bus
+ * Copyright (c) 2011 Wim Huiskamp
+ *
+ * Released under the MIT License: http://mbed.org/license/mit
+ *
+ * version 0.2 Initial Release
+*/
+#ifndef _PCF8574_DATABUS_H
+#define _PCF8574_DATABUS_H
+
+//Pin Defines for PCF8574 Data Bus
+#define D_D0                   0x01
+#define D_D1                   0x02
+#define D_D2                   0x04
+#define D_D3                   0x08
+#define D_D4                   0x10
+#define D_D5                   0x20
+#define D_D6                   0x40
+#define D_D7                   0x80
+
+#define D_DATA_MSK             0xFF
+
+//Enums for Data Bus
+#include "BusEnums.h"
+
+
+/** Create an PCF8574_DataBus object connected to the specified I2C object and using the specified deviceAddress
+ *
+ * @param I2C &i2c the I2C port to connect to 
+ * @param char deviceAddress the address of the PCF8574
+*/
+class PCF8574_DataBus {
+public:
+    PCF8574_DataBus(I2C &i2c, char deviceAddress);
+    char read();
+    void write(char byte);
+    void busdir (Bus_Dir bus_dir);    
+protected:
+    I2C &_i2c;
+    char _readOpcode;
+    char _writeOpcode; 
+    void _init(); 
+};
+
+#endif
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