mirror of
https://github.com/qmk/qmk_firmware.git
synced 2024-11-22 19:39:27 +00:00
105 lines
2.0 KiB
C
105 lines
2.0 KiB
C
#include <stdbool.h>
|
|
#include "action.h"
|
|
#include "i2c_master.h"
|
|
#include "expander.h"
|
|
#include "debug.h"
|
|
|
|
#define I2C_TIMEOUT 100
|
|
|
|
static uint8_t expander_status = 0;
|
|
static uint8_t expander_input = 0;
|
|
|
|
void expander_config(void);
|
|
uint8_t expander_write(uint8_t reg, uint8_t data);
|
|
uint8_t expander_read(uint8_t reg, uint8_t *data);
|
|
|
|
void expander_init(void)
|
|
{
|
|
i2c_init();
|
|
expander_scan();
|
|
}
|
|
|
|
void expander_scan(void)
|
|
{
|
|
dprintf("expander status: %d ... ", expander_status);
|
|
uint8_t ret = i2c_start(EXPANDER_ADDR | I2C_WRITE, I2C_TIMEOUT);
|
|
if (ret == 0) {
|
|
i2c_stop();
|
|
if (expander_status == 0) {
|
|
dprintf("attached\n");
|
|
expander_status = 1;
|
|
expander_config();
|
|
clear_keyboard();
|
|
}
|
|
}
|
|
else {
|
|
if (expander_status == 1) {
|
|
dprintf("detached\n");
|
|
expander_status = 0;
|
|
clear_keyboard();
|
|
}
|
|
}
|
|
dprintf("%d\n", expander_status);
|
|
}
|
|
|
|
void expander_read_cols(void)
|
|
{
|
|
expander_read(EXPANDER_REG_GPIOA, &expander_input);
|
|
}
|
|
|
|
uint8_t expander_get_col(uint8_t col)
|
|
{
|
|
if (col > 4) {
|
|
col++;
|
|
}
|
|
return expander_input & (1<<col) ? 1 : 0;
|
|
}
|
|
|
|
matrix_row_t expander_read_row(void)
|
|
{
|
|
expander_read_cols();
|
|
|
|
/* make cols */
|
|
matrix_row_t cols = 0;
|
|
for (uint8_t col = 0; col < MATRIX_COLS; col++) {
|
|
if (expander_get_col(col)) {
|
|
cols |= (1UL << (MATRIX_COLS - 1 - col));
|
|
}
|
|
}
|
|
|
|
return cols;
|
|
}
|
|
|
|
void expander_unselect_rows(void)
|
|
{
|
|
expander_write(EXPANDER_REG_IODIRB, 0xFF);
|
|
}
|
|
|
|
void expander_select_row(uint8_t row)
|
|
{
|
|
expander_write(EXPANDER_REG_IODIRB, ~(1<<(row+1)));
|
|
}
|
|
|
|
void expander_config(void)
|
|
{
|
|
expander_write(EXPANDER_REG_IPOLA, 0xFF);
|
|
expander_write(EXPANDER_REG_GPPUA, 0xFF);
|
|
expander_write(EXPANDER_REG_IODIRB, 0xFF);
|
|
}
|
|
|
|
uint8_t expander_write(uint8_t reg, uint8_t data)
|
|
{
|
|
if (expander_status == 0) {
|
|
return 0;
|
|
}
|
|
return i2c_writeReg(EXPANDER_ADDR, reg, &data, 1, I2C_TIMEOUT);
|
|
}
|
|
|
|
uint8_t expander_read(uint8_t reg, uint8_t *data)
|
|
{
|
|
if (expander_status == 0) {
|
|
return 0;
|
|
}
|
|
return i2c_readReg(EXPANDER_ADDR, reg, data, 1, I2C_TIMEOUT);
|
|
}
|