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/* file:          mcp23s17.h

 * description:   Microchip mcp23s17 chip driver

 * date:          09/2015

 * author:        Sergio Johann Filho <sergio.filho@pucrs.br>

 */

#define MCP23x17_ADDR           0x40

#define ALL_OUTPUTS             0x00

#define ALL_INPUTS              0xff

#define MCP23x17_IODIRA         0x00

#define MCP23x17_IODIRB         0x01

#define MCP23x17_IOPOLA         0x02

#define MCP23x17_IOPOLB         0x03

#define MCP23x17_GPINTENA       0x04

#define MCP23x17_GPINTENB       0x05

#define MCP23x17_DEFVALA        0x06

#define MCP23x17_DEFVALB        0x07

#define MCP23x17_INTCONA        0x08

#define MCP23x17_INTCONB        0x09

#define MCP23x17_IOCON          0x0A

#define MCP23x17_GPPUA          0x0C

#define MCP23x17_GPPUB          0x0D

#define MCP23x17_INTFA          0x0E

#define MCP23x17_INTFB          0x0F

#define MCP23x17_INTCAPA        0x10

#define MCP23x17_INTCAPB        0x11

#define MCP23x17_GPIOA          0x12

#define MCP23x17_GPIOB          0x13

#define MCP23x17_OPLATA         0x14

#define MCP23x17_OPLATB         0x15

#define MCP23x17_IOCON_BANK     7

#define MCP23x17_IOCON_MIRROR   6

#define MCP23x17_IOCON_SEQOP    5

#define MCP23x17_IOCON_DISSLW   4

#define MCP23x17_IOCON_HAEN     3

#define MCP23x17_IOCON_ODR      2

#define MCP23x17_IOCON_INTPOL   1

void mcp23s17_dir(uint8_t device, uint8_t bank, uint8_t reg);

uint8_t mcp23s17_read(uint8_t device, uint8_t bank);

void mcp23s17_write(uint8_t device, uint8_t bank, uint8_t reg);

void mcp23s17_inten(uint8_t device, uint8_t bank, uint8_t reg);

void mcp23s17_init(uint8_t device, uint8_t portdir_a, uint8_t portdir_b);