5 #include "i2c_master.h"
6 #include <util/delay.h>
13 #define I2C_ADDR (0x20)
14 #define I2C_ADDR_WRITE ((I2C_ADDR << 1) | I2C_WRITE)
15 #define I2C_ADDR_READ ((I2C_ADDR << 1) | I2C_READ)
18 #define MCP23017_B0_IODIRA 0x00
19 #define MCP23017_B0_IODIRB 0x01
20 #define MCP23017_B0_IPOLA 0x02
21 #define MCP23017_B0_IPOLB 0x03
22 #define MCP23017_B0_GPINTENA 0x04
23 #define MCP23017_B0_GPINTENB 0x05
24 #define MCP23017_B0_DEFVALA 0x06
25 #define MCP23017_B0_DEFVALB 0x07
26 #define MCP23017_B0_INTCONA 0x08
27 #define MCP23017_B0_INTCONB 0x09
28 #define MCP23017_B0_IOCONA 0x0A
29 #define MCP23017_B0_IOCONB 0x0B
30 #define MCP23017_B0_GPPUA 0x0C
31 #define MCP23017_B0_GPPUB 0x0D
32 #define MCP23017_B0_INTFA 0x0E
33 #define MCP23017_B0_INTFB 0x0F
34 #define MCP23017_B0_INTCAPA 0x10
35 #define MCP23017_B0_INTCAPB 0x11
36 #define MCP23017_B0_GPIOA 0x12
37 #define MCP23017_B0_GPIOB 0x13
38 #define MCP23017_B0_OLATA 0x14
39 #define MCP23017_B0_OLATB 0x15
41 #define HOTDOX_I2C_TIMEOUT 100
43 typedef int16_t i2c_status_t;
48 uint8_t left_read_cols(void);
49 uint8_t left_get_col(uint8_t col);
51 matrix_row_t left_read_row(void);
53 void left_unselect_rows(void);
54 void left_select_row(uint8_t row);
56 uint8_t init_mcp23017(void);