1 #include QMK_KEYBOARD_H
3 bool i2c_initialized = 0;
4 i2c_status_t mcp23018_status = 0x20;
6 void matrix_init_kb(void) {
7 steno_set_mode(STENO_MODE_GEMINI); // or STENO_MODE_BOLT
9 // (tied to Vcc for hardware convenience)
10 //DDRB &= ~(1<<4); // set B(4) as input
11 //PORTB &= ~(1<<4); // set B(4) internal pull-up disabled
13 // unused pins - C7, D4, D5, D7, E6
14 // set as input with internal pull-up enabled
16 DDRD &= ~(1<<5 | 1<<4 | 1<<6 | 1<<7);
19 PORTD |= (1<<5 | 1<<4 | 1<<6 | 1<<7);
26 uint8_t init_mcp23018(void) {
27 print("starting init");
28 mcp23018_status = 0x20;
36 if (i2c_initialized == 0) {
37 i2c_init(); // on pins D(1,0)
38 i2c_initialized = true;
41 // i2c_init(); // on pins D(1,0)
45 // - unused : input : 1
46 // - input : input : 1
47 // - driving : output : 0
48 mcp23018_status = i2c_start(I2C_ADDR_WRITE, ERGODOX_EZ_I2C_TIMEOUT); if (mcp23018_status) goto out;
49 mcp23018_status = i2c_write(IODIRA, ERGODOX_EZ_I2C_TIMEOUT); if (mcp23018_status) goto out;
50 mcp23018_status = i2c_write(0b10000000, ERGODOX_EZ_I2C_TIMEOUT); if (mcp23018_status) goto out;
51 mcp23018_status = i2c_write(0b11111111, ERGODOX_EZ_I2C_TIMEOUT); if (mcp23018_status) goto out;
57 // - driving : off : 0
58 mcp23018_status = i2c_start(I2C_ADDR_WRITE, ERGODOX_EZ_I2C_TIMEOUT); if (mcp23018_status) goto out;
59 mcp23018_status = i2c_write(GPPUA, ERGODOX_EZ_I2C_TIMEOUT); if (mcp23018_status) goto out;
60 mcp23018_status = i2c_write(0b10000000, ERGODOX_EZ_I2C_TIMEOUT); if (mcp23018_status) goto out;
61 mcp23018_status = i2c_write(0b11111111, ERGODOX_EZ_I2C_TIMEOUT); if (mcp23018_status) goto out;
66 //uprintf("Init %x\n", mcp23018_status);
67 return mcp23018_status;