2013-02-14 02:59:15 +01:00
|
|
|
/*
|
2013-02-14 03:12:31 +01:00
|
|
|
INPUT_MCP23017.h - Library for reading inputs from MCP23017 port Expander
|
|
|
|
|
|
|
|
|
|
library is for specialiced use: all I/O ports are used as digital inputs with internal pullup resistor active, values are stored and a callback function is called, when a value changes
|
|
|
|
|
|
|
|
|
|
*/
|
2013-02-14 02:59:15 +01:00
|
|
|
*/
|
|
|
|
|
#ifndef INPUT_MCP23017_h
|
|
|
|
|
#define INPUT_MCP23017_h
|
|
|
|
|
|
|
|
|
|
#if !defined(CallbackFunction)
|
|
|
|
|
typedef void (*CallbackFunction)(int,int,int);
|
|
|
|
|
#endif
|
|
|
|
|
|
|
|
|
|
class INPUT_MCP23017
|
|
|
|
|
{
|
|
|
|
|
public:
|
|
|
|
|
void begin(uint8_t addr,CallbackFunction cbF);
|
|
|
|
|
void loop(void);
|
|
|
|
|
int getSpecificValue(uint8_t pin);
|
|
|
|
|
private:
|
|
|
|
|
uint8_t _addr;
|
|
|
|
|
int _value[16];
|
|
|
|
|
CallbackFunction _callbackFunction;
|
|
|
|
|
};
|
|
|
|
|
|
|
|
|
|
#define MCP23017_ADDRESS 0x20
|
|
|
|
|
|
|
|
|
|
// registers (from https://github.com/adafruit/Adafruit-MCP23017-Arduino-Library/blob/master/Adafruit_MCP23017.h)
|
|
|
|
|
#define MCP23017_IODIRA 0x00
|
|
|
|
|
#define MCP23017_IPOLA 0x02
|
|
|
|
|
#define MCP23017_GPINTENA 0x04
|
|
|
|
|
#define MCP23017_DEFVALA 0x06
|
|
|
|
|
#define MCP23017_INTCONA 0x08
|
|
|
|
|
#define MCP23017_IOCONA 0x0A
|
|
|
|
|
#define MCP23017_GPPUA 0x0C
|
|
|
|
|
#define MCP23017_INTFA 0x0E
|
|
|
|
|
#define MCP23017_INTCAPA 0x10
|
|
|
|
|
#define MCP23017_GPIOA 0x12
|
|
|
|
|
#define MCP23017_OLATA 0x14
|
|
|
|
|
|
|
|
|
|
#define MCP23017_IODIRB 0x01
|
|
|
|
|
#define MCP23017_IPOLB 0x03
|
|
|
|
|
#define MCP23017_GPINTENB 0x05
|
|
|
|
|
#define MCP23017_DEFVALB 0x07
|
|
|
|
|
#define MCP23017_INTCONB 0x09
|
|
|
|
|
#define MCP23017_IOCONB 0x0B
|
|
|
|
|
#define MCP23017_GPPUB 0x0D
|
|
|
|
|
#define MCP23017_INTFB 0x0F
|
|
|
|
|
#define MCP23017_INTCAPB 0x11
|
|
|
|
|
#define MCP23017_GPIOB 0x13
|
|
|
|
|
#define MCP23017_OLATB 0x15
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
#endif
|
