67 lines
2.1 KiB
C
67 lines
2.1 KiB
C
|
#include QMK_KEYBOARD_H
|
||
|
|
|
||
|
|
bool i2c_initialized = 0;
|
||
|
|
i2c_status_t mcp23018_status = 0x20;
|
||
|
|
|
||
|
|
void matrix_init_kb(void) {
|
||
|
|
// (tied to Vcc for hardware convenience)
|
||
|
|
//DDRB &= ~(1<<4); // set B(4) as input
|
||
|
|
//PORTB &= ~(1<<4); // set B(4) internal pull-up disabled
|
||
|
|
|
||
|
|
// unused pins - C7, D4, D5, D7, E6
|
||
|
|
// set as input with internal pull-up enabled
|
||
|
|
DDRC &= ~(1<<7);
|
||
|
|
DDRD &= ~(1<<5 | 1<<4 | 1<<6 | 1<<7);
|
||
|
|
DDRE &= ~(1<<6);
|
||
|
|
PORTC |= (1<<7);
|
||
|
|
PORTD |= (1<<5 | 1<<4 | 1<<6 | 1<<7);
|
||
|
|
PORTE |= (1<<6);
|
||
|
|
|
||
|
|
matrix_init_user();
|
||
|
|
}
|
||
|
|
|
||
|
|
|
||
|
|
uint8_t init_mcp23018(void) {
|
||
|
|
print("starting init");
|
||
|
|
mcp23018_status = 0x20;
|
||
|
|
|
||
|
|
// I2C subsystem
|
||
|
|
|
||
|
|
// uint8_t sreg_prev;
|
||
|
|
// sreg_prev=SREG;
|
||
|
|
// cli();
|
||
|
|
|
||
|
|
if (i2c_initialized == 0) {
|
||
|
|
i2c_init(); // on pins D(1,0)
|
||
|
|
i2c_initialized = true;
|
||
|
|
_delay_ms(1000);
|
||
|
|
}
|
||
|
|
// i2c_init(); // on pins D(1,0)
|
||
|
|
// _delay_ms(1000);
|
||
|
|
|
||
|
|
// set pin direction
|
||
|
|
// - unused : input : 1
|
||
|
|
// - input : input : 1
|
||
|
|
// - driving : output : 0
|
||
|
|
mcp23018_status = i2c_start(I2C_ADDR_WRITE, ERGODOX_EZ_I2C_TIMEOUT); if (mcp23018_status) goto out;
|
||
|
|
mcp23018_status = i2c_write(IODIRA, ERGODOX_EZ_I2C_TIMEOUT); if (mcp23018_status) goto out;
|
||
|
|
mcp23018_status = i2c_write(0b10000000, ERGODOX_EZ_I2C_TIMEOUT); if (mcp23018_status) goto out;
|
||
|
|
mcp23018_status = i2c_write(0b11111111, ERGODOX_EZ_I2C_TIMEOUT); if (mcp23018_status) goto out;
|
||
|
|
i2c_stop(ERGODOX_EZ_I2C_TIMEOUT);
|
||
|
|
|
||
|
|
// set pull-up
|
||
|
|
// - unused : on : 1
|
||
|
|
// - input : on : 1
|
||
|
|
// - driving : off : 0
|
||
|
|
mcp23018_status = i2c_start(I2C_ADDR_WRITE, ERGODOX_EZ_I2C_TIMEOUT); if (mcp23018_status) goto out;
|
||
|
|
mcp23018_status = i2c_write(GPPUA, ERGODOX_EZ_I2C_TIMEOUT); if (mcp23018_status) goto out;
|
||
|
|
mcp23018_status = i2c_write(0b10000000, ERGODOX_EZ_I2C_TIMEOUT); if (mcp23018_status) goto out;
|
||
|
|
mcp23018_status = i2c_write(0b11111111, ERGODOX_EZ_I2C_TIMEOUT); if (mcp23018_status) goto out;
|
||
|
|
|
||
|
|
out:
|
||
|
|
i2c_stop(ERGODOX_EZ_I2C_TIMEOUT);
|
||
|
|
// SREG=sreg_prev;
|
||
|
|
//uprintf("Init %x\n", mcp23018_status);
|
||
|
|
return mcp23018_status;
|
||
|
|
}
|