Libraries and Example of mbed parallel bus using I2C port expanders
Dependencies: HDSP253X mbed PCF8574_Bus
PCF8574_DataBus.h
- Committer:
- wim
- Date:
- 2011-08-31
- Revision:
- 0:2467aed99127
File content as of revision 0:2467aed99127:
/* 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