56 lines
1.4 KiB
C++
56 lines
1.4 KiB
C++
/*
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INPUT_MCP23017.h - Library for reading inputs from MCP23017 port Expander
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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
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*/
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*/
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#ifndef INPUT_MCP23017_h
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#define INPUT_MCP23017_h
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#if !defined(CallbackFunction)
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typedef void (*CallbackFunction)(int,int,int);
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#endif
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class INPUT_MCP23017
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{
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public:
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void begin(uint8_t addr,CallbackFunction cbF);
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void loop(void);
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int getSpecificValue(uint8_t pin);
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private:
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uint8_t _addr;
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int _value[16];
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CallbackFunction _callbackFunction;
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};
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#define MCP23017_ADDRESS 0x20
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// registers (from https://github.com/adafruit/Adafruit-MCP23017-Arduino-Library/blob/master/Adafruit_MCP23017.h)
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#define MCP23017_IODIRA 0x00
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#define MCP23017_IPOLA 0x02
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#define MCP23017_GPINTENA 0x04
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#define MCP23017_DEFVALA 0x06
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#define MCP23017_INTCONA 0x08
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#define MCP23017_IOCONA 0x0A
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#define MCP23017_GPPUA 0x0C
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#define MCP23017_INTFA 0x0E
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#define MCP23017_INTCAPA 0x10
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#define MCP23017_GPIOA 0x12
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#define MCP23017_OLATA 0x14
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#define MCP23017_IODIRB 0x01
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#define MCP23017_IPOLB 0x03
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#define MCP23017_GPINTENB 0x05
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#define MCP23017_DEFVALB 0x07
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#define MCP23017_INTCONB 0x09
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#define MCP23017_IOCONB 0x0B
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#define MCP23017_GPPUB 0x0D
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#define MCP23017_INTFB 0x0F
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#define MCP23017_INTCAPB 0x11
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#define MCP23017_GPIOB 0x13
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#define MCP23017_OLATB 0x15
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#endif
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