mh
/
qmk_firmware
mirror of https://github.com/qmk/qmk_firmware/
1
0
Fork 0
Code Issues 0 Projects 0 Releases 1.6k Wiki Activity
You can not select more than 25 topics Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
27015 Commits
64 Branches
2.0 GiB
 
 
 
 
 
Branch: master
Branches Tags
${ item.name }
Create branch ${ searchTerm }
from 'master'
${ noResults }
qmk_firmware/keyboards/sx60/sx60.c

35 lines
808 B
Raw Permalink Blame History

#include "sx60.h"
#include "i2c_master.h"
bool i2c_initialized = 0;
uint8_t mcp23018_status = 0x20;
uint8_t init_mcp23018(void) {
mcp23018_status = 0x20;
/* I2C subsystem */
if (i2c_initialized == 0) {
i2c_init(); // on pins D(1,0)
i2c_initialized = true;
_delay_ms(1000);
}
/* B Pins are Row, A pins are Columns
Set them to output */
static uint8_t direction[2] = {
0b11111111,
0b00000000,
};
static uint8_t pullup[2] = {
0b11111111,
0b00000000,
};
mcp23018_status = i2c_write_register(I2C_ADDR, IODIRA, direction, 2, I2C_TIMEOUT);
if (mcp23018_status) return mcp23018_status;
mcp23018_status = i2c_write_register(I2C_ADDR, GPPUA, pullup, 2, I2C_TIMEOUT);
return mcp23018_status;
}