1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
|
#ifndef EXPANDER_H
#define EXPANDER_H
#include <stdint.h>
#include "matrix.h"
#define MCP23017
#define MCP23017_A0 0
#define MCP23017_A1 0
#define MCP23017_A2 0
#ifdef MCP23017
#define EXPANDER_ADDR ((0x20|(MCP23017_A0<<0)|(MCP23017_A1<<1)|(MCP23017_A2<<2)) << 1)
enum EXPANDER_REG_BANK0 {
EXPANDER_REG_IODIRA = 0,
EXPANDER_REG_IODIRB,
EXPANDER_REG_IPOLA,
EXPANDER_REG_IPOLB,
EXPANDER_REG_GPINTENA,
EXPANDER_REG_GPINTENB,
EXPANDER_REG_DEFVALA,
EXPANDER_REG_DEFVALB,
EXPANDER_REG_INTCONA,
EXPANDER_REG_INTCONB,
EXPANDER_REG_IOCONA,
EXPANDER_REG_IOCONB,
EXPANDER_REG_GPPUA,
EXPANDER_REG_GPPUB,
EXPANDER_REG_INTFA,
EXPANDER_REG_INTFB,
EXPANDER_REG_INTCAPA,
EXPANDER_REG_INTCAPB,
EXPANDER_REG_GPIOA,
EXPANDER_REG_GPIOB,
EXPANDER_REG_OLATA,
EXPANDER_REG_OLATB
};
#endif
void expander_init(void);
void expander_scan(void);
void expander_read_cols(void);
uint8_t expander_get_col(uint8_t col);
matrix_row_t expander_read_row(void);
void expander_unselect_rows(void);
void expander_select_row(uint8_t row);
#endif
|
