m b / Mbed 2 deprecated 4180Lab1

Complete

Dependencies:   mbed

MCP23S17.h@3:ecfa4fa0b5a7, 2016-01-30 (annotated)

Committer:
mikeb
Date:
Sat Jan 30 03:22:41 2016 +0000
Revision:
3:ecfa4fa0b5a7
Parent:
0:8f5b2af5e1d5 
Complete;

Who changed what in which revision?

UserRevisionLine numberNew contents of line
mikeb 0:8f5b2af5e1d5 1 /* MCP23S17 - drive the Microchip MCP23S17 16-bit Port Extender using SPI
mikeb 0:8f5b2af5e1d5 2 * Copyright (c) 2010 Romilly Cocking
mikeb 0:8f5b2af5e1d5 3 * Released under the MIT License: http://mbed.org/license/mit
mikeb 0:8f5b2af5e1d5 4 *
mikeb 0:8f5b2af5e1d5 5 * version 0.4
mikeb 0:8f5b2af5e1d5 6 */
mikeb 0:8f5b2af5e1d5 7 #include "mbed.h"
mikeb 0:8f5b2af5e1d5 8
mikeb 0:8f5b2af5e1d5 9 #ifndef MCP23S17_H
mikeb 0:8f5b2af5e1d5 10 #define MCP23S17_H
mikeb 0:8f5b2af5e1d5 11
mikeb 0:8f5b2af5e1d5 12 #define INTERRUPT_POLARITY_BIT 0x02
mikeb 0:8f5b2af5e1d5 13 #define INTERRUPT_MIRROR_BIT 0x40
mikeb 0:8f5b2af5e1d5 14
mikeb 0:8f5b2af5e1d5 15 // all register addresses assume IOCON.BANK = 0 (POR default)
mikeb 0:8f5b2af5e1d5 16
mikeb 0:8f5b2af5e1d5 17 #define IODIRA 0x00
mikeb 0:8f5b2af5e1d5 18 #define GPINTENA 0x04
mikeb 0:8f5b2af5e1d5 19 #define DEFVALA 0x06
mikeb 0:8f5b2af5e1d5 20 #define INTCONA 0x08
mikeb 0:8f5b2af5e1d5 21 #define IOCON 0x0A
mikeb 0:8f5b2af5e1d5 22 #define GPPUA 0x0C
mikeb 0:8f5b2af5e1d5 23 #define GPIOA 0x12
mikeb 0:8f5b2af5e1d5 24 #define OLATA 0x14
mikeb 0:8f5b2af5e1d5 25
mikeb 0:8f5b2af5e1d5 26 // Control settings
mikeb 0:8f5b2af5e1d5 27
mikeb 0:8f5b2af5e1d5 28 #define IOCON_BANK 0x80 // Banked registers
mikeb 0:8f5b2af5e1d5 29 #define IOCON_BYTE_MODE 0x20 // Disables sequential operation. If bank = 0, operations toggle between A and B registers
mikeb 0:8f5b2af5e1d5 30 #define IOCON_HAEN 0x08 // Hardware address enable
mikeb 0:8f5b2af5e1d5 31
mikeb 0:8f5b2af5e1d5 32 enum Polarity { ACTIVE_LOW , ACTIVE_HIGH };
mikeb 0:8f5b2af5e1d5 33 enum Port { PORT_A, PORT_B };
mikeb 0:8f5b2af5e1d5 34
mikeb 0:8f5b2af5e1d5 35 class MCP23S17 {
mikeb 0:8f5b2af5e1d5 36 public:
mikeb 0:8f5b2af5e1d5 37 MCP23S17(SPI& spi, PinName ncs, char writeOpcode);
mikeb 0:8f5b2af5e1d5 38 void direction(Port port, char direction);
mikeb 0:8f5b2af5e1d5 39 void configurePullUps(Port port, char offOrOn);
mikeb 0:8f5b2af5e1d5 40 void interruptEnable(Port port, char interruptsEnabledMask);
mikeb 0:8f5b2af5e1d5 41 void interruptPolarity(Polarity polarity);
mikeb 0:8f5b2af5e1d5 42 void mirrorInterrupts(bool mirror);
mikeb 0:8f5b2af5e1d5 43 void defaultValue(Port port, char valuesToCompare);
mikeb 0:8f5b2af5e1d5 44 void interruptControl(Port port, char interruptContolBits);
mikeb 0:8f5b2af5e1d5 45 char read(Port port);
mikeb 0:8f5b2af5e1d5 46 void write(Port port, char byte);
mikeb 0:8f5b2af5e1d5 47 protected:
mikeb 0:8f5b2af5e1d5 48 SPI& _spi;
mikeb 0:8f5b2af5e1d5 49 DigitalOut _ncs;
mikeb 0:8f5b2af5e1d5 50 void _init();
mikeb 0:8f5b2af5e1d5 51 void _write(Port port, char address, char data);
mikeb 0:8f5b2af5e1d5 52 void _write(char address, char data);
mikeb 0:8f5b2af5e1d5 53 char _read(Port port, char address);
mikeb 0:8f5b2af5e1d5 54 char _read(char address);
mikeb 0:8f5b2af5e1d5 55 char _readOpcode;
mikeb 0:8f5b2af5e1d5 56 char _writeOpcode;
mikeb 0:8f5b2af5e1d5 57 };
mikeb 0:8f5b2af5e1d5 58
mikeb 0:8f5b2af5e1d5 59 #endif