Diff: PCF8574_DataBus.cpp

Revision:

7:8680b8b718c8

Parent:

6:aaefa04f06be

--- a/PCF8574_DataBus.cpp	Sun Jan 25 17:30:47 2015 +0000
+++ /dev/null	Thu Jan 01 00:00:00 1970 +0000
@@ -1,75 +0,0 @@
-/* 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
-*/
-#include "mbed.h"
-#include "PCF8574_DataBus.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
-*/
-PCF8574_DataBus::PCF8574_DataBus(I2C &i2c, char deviceAddress) : _i2c(i2c) {
-   _writeOpcode = deviceAddress & 0xFE; // low order bit = 0 for write
-   _readOpcode  = deviceAddress | 0x01; // low order bit = 1 for read
-   _init();
-}
-
-/** Optimised DataBus write operation.
- * @param byte the datavalue to output on the bus
-*/
-void PCF8574_DataBus::write(char byte) {
-    char data[1];
-    
-    data[0] = byte;
-    _i2c.write(_writeOpcode, data, 1);    // Write datavalue to bus   
-}
-
-/** Optimised DataBus read operation.
- *
- * @returns current data from Databus 
-*/
-char PCF8574_DataBus::read() {
-    char data[1];
-
-//Make sure that databus is enabled for Read
-//    data[0] = 0xFF;                       // Init Port for datainput by Writing 0xFF 
-//   _i2c.write(_writeOpcode, data, 1);    // Write to bus   
-    
-    _i2c.read(_readOpcode, data, 1);      // Read data from bus
-     
-   return data[0];
-}
-
-
-/** Enable databus for Write or Read
- *
- * @param Bus_Dir bus_dir
-*/
-void PCF8574_DataBus::busdir (Bus_Dir bus_dir) {
-
-    if (bus_dir == READ) {
-      // Make sure that databus is enabled for READ
-      write(0xFF);                          // Init Port as input by Writing 0xFF 
-            
-    }                
-    else {
-      // Make sure that databus is enabled for WRITE   
-      write(0xFF);                          // Not really needed, just Init Port to safe settings
-    }      
-}
-
-
-
-/** Init PCF8574_DataBus
- * @param
- * @returns 
- */
-void PCF8574_DataBus::_init() {
- 
-    busdir(WRITE);                          // Init Port as output 
-}
\ No newline at end of file