34 lines
838 B
C++
34 lines
838 B
C++
#ifndef MCP23S17_H
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#define MCP23S17_H
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#include "spi.h"
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class MCP23S17
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{
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public:
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MCP23S17(volatile SPI&, SPIADR adr);
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void setDirA(uint8_t dir) const volatile;
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void setDirB(uint8_t dir) const volatile;
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void writePortA(uint8_t) const volatile;
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void writePortB(uint8_t) const volatile;
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uint8_t readPortA(void) const volatile;
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uint8_t readPortB(void) const volatile;
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private:
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volatile SPI& spi;
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const SPIADR adr;
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// constants
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constexpr static uint8_t MCP23S17_DIRA = 0x00;
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constexpr static uint8_t MCP23S17_DIRB = 0x01;
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constexpr static uint8_t MCP23S17_PORTA = 0x12;
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constexpr static uint8_t MCP23S17_PORTB = 0x13;
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constexpr static uint8_t MCP23S17_READ = 0x01;
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constexpr static uint8_t MCP23S17_WRITE = 0x00;
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constexpr static uint8_t MCP23S17_OPCODE = 0x40;
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};
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#endif // MCP23S17_H
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