Wim Huiskamp / Mbed 2 deprecated mbed_bus

Libraries and Example of mbed parallel bus using I2C port expanders

Dependencies:   HDSP253X mbed PCF8574_Bus

PCF8574_EnableBus.h@2:1dab1089c332, 2011-08-20 (annotated)

Committer:
wim
Date:
Sat Aug 20 12:49:44 2011 +0000
Revision:
2:1dab1089c332
First commit, testloop

Who changed what in which revision?

UserRevisionLine numberNew contents of line
wim 2:1dab1089c332 1 /* PCF8574_EnableBus - Use the PCF8574 I2C Port Extender for controlling the Chip Enable Bus
wim 2:1dab1089c332 2 * Copyright (c) 2011 Wim Huiskamp
wim 2:1dab1089c332 3 *
wim 2:1dab1089c332 4 * Released under the MIT License: http://mbed.org/license/mit
wim 2:1dab1089c332 5 *
wim 2:1dab1089c332 6 * version 0.2 Initial Release
wim 2:1dab1089c332 7 */
wim 2:1dab1089c332 8 #ifndef _PCF8574_ENABLEBUS_H
wim 2:1dab1089c332 9 #define _PCF8574_ENABLEBUS_H
wim 2:1dab1089c332 10
wim 2:1dab1089c332 11 //Pin Defines for PCF8574 Enable Bus
wim 2:1dab1089c332 12 //Note: 'Reset' causes all devices on the 'Control & Display Unit' to be reset!
wim 2:1dab1089c332 13 #define D_CS_SWITCH 0x01
wim 2:1dab1089c332 14 #define D_LATCHEN_1 0x02
wim 2:1dab1089c332 15 #define D_LATCHEN_2 0x04
wim 2:1dab1089c332 16 #define D_CS_BRIGHT 0x08
wim 2:1dab1089c332 17 #define D_CS_DISP 0x10
wim 2:1dab1089c332 18 #define D_CS_SPARE 0x20
wim 2:1dab1089c332 19 #define D_RESET 0x40
wim 2:1dab1089c332 20 #define D_NOGO 0x80
wim 2:1dab1089c332 21
wim 2:1dab1089c332 22 #define D_ENABLE_MSK 0x3F
wim 2:1dab1089c332 23
wim 2:1dab1089c332 24 //Enums for Enable Bus
wim 2:1dab1089c332 25 #include "BusEnums.h"
wim 2:1dab1089c332 26 enum CS_Pin { CS_SWITCH, LATCHEN_1, LATCHEN_2, CS_BRIGHT, CS_DISP, CS_SPARE };
wim 2:1dab1089c332 27
wim 2:1dab1089c332 28
wim 2:1dab1089c332 29 /** Create an PCF8574_EnableBus object connected to the specified I2C object and using the specified deviceAddress
wim 2:1dab1089c332 30 *
wim 2:1dab1089c332 31 * @param I2C &i2c the I2C port to connect to
wim 2:1dab1089c332 32 * @param char deviceAddress the address of the PCF8574
wim 2:1dab1089c332 33 */
wim 2:1dab1089c332 34 class PCF8574_EnableBus {
wim 2:1dab1089c332 35 public:
wim 2:1dab1089c332 36 PCF8574_EnableBus(I2C &i2c, char deviceAddress);
wim 2:1dab1089c332 37 void chipselect (CS_Pin cs_pin, Bit_Level cs_level);
wim 2:1dab1089c332 38 void reset (Bit_Level rst_level);
wim 2:1dab1089c332 39 void nogo (Bit_Level nogo_level);
wim 2:1dab1089c332 40 protected:
wim 2:1dab1089c332 41 I2C &_i2c;
wim 2:1dab1089c332 42 char _readOpcode;
wim 2:1dab1089c332 43 char _writeOpcode;
wim 2:1dab1089c332 44 char _enable_bus;
wim 2:1dab1089c332 45 char _reset_pin;
wim 2:1dab1089c332 46 char _nogo_pin;
wim 2:1dab1089c332 47 // char _read();
wim 2:1dab1089c332 48 void _write();
wim 2:1dab1089c332 49 void _write(char byte);
wim 2:1dab1089c332 50 void _init();
wim 2:1dab1089c332 51 };
wim 2:1dab1089c332 52
wim 2:1dab1089c332 53 #endif