1 #include QMK_KEYBOARD_H
3 bool i2c_initialized = 0;
4 i2c_status_t mcp23018_status = 0x20;
6 void matrix_init_kb(void) {
7 // (tied to Vcc for hardware convenience)
8 //DDRB &= ~(1<<4); // set B(4) as input
9 //PORTB &= ~(1<<4); // set B(4) internal pull-up disabled
11 // unused pins - C7, D4, D5, D7, E6
12 // set as input with internal pull-up enabled
14 DDRD &= ~(1<<5 | 1<<4 | 1<<6 | 1<<7);
17 PORTD |= (1<<5 | 1<<4 | 1<<6 | 1<<7);
24 uint8_t init_mcp23018(void) {
25 print("starting init");
26 mcp23018_status = 0x20;
34 if (i2c_initialized == 0) {
35 i2c_init(); // on pins D(1,0)
36 i2c_initialized = true;
39 // i2c_init(); // on pins D(1,0)
43 // - unused : input : 1
44 // - input : input : 1
45 // - driving : output : 0
46 mcp23018_status = i2c_start(I2C_ADDR_WRITE, ERGODOX_EZ_I2C_TIMEOUT); if (mcp23018_status) goto out;
47 mcp23018_status = i2c_write(IODIRA, ERGODOX_EZ_I2C_TIMEOUT); if (mcp23018_status) goto out;
48 mcp23018_status = i2c_write(0b10000000, ERGODOX_EZ_I2C_TIMEOUT); if (mcp23018_status) goto out;
49 mcp23018_status = i2c_write(0b11111111, ERGODOX_EZ_I2C_TIMEOUT); if (mcp23018_status) goto out;
50 i2c_stop(ERGODOX_EZ_I2C_TIMEOUT);
55 // - driving : off : 0
56 mcp23018_status = i2c_start(I2C_ADDR_WRITE, ERGODOX_EZ_I2C_TIMEOUT); if (mcp23018_status) goto out;
57 mcp23018_status = i2c_write(GPPUA, ERGODOX_EZ_I2C_TIMEOUT); if (mcp23018_status) goto out;
58 mcp23018_status = i2c_write(0b10000000, ERGODOX_EZ_I2C_TIMEOUT); if (mcp23018_status) goto out;
59 mcp23018_status = i2c_write(0b11111111, ERGODOX_EZ_I2C_TIMEOUT); if (mcp23018_status) goto out;
62 i2c_stop(ERGODOX_EZ_I2C_TIMEOUT);
64 //uprintf("Init %x\n", mcp23018_status);
65 return mcp23018_status;
68 const keypos_t hand_swap_config[MATRIX_ROWS][MATRIX_COLS] = {
69 { {0,0}, {0,7}, {2,7}, {3,7} },
70 { {0,8}, {1,8}, {2,8}, {3,8} },
71 { {0,9}, {1,9}, {2,9}, {3,9} },
72 { {0,10}, {1,10}, {2,10}, {3,10} },
73 { {0,11}, {1,11}, {2,11}, {3,11} },
74 { {0,12}, {1,12}, {2,12}, {0,0} },
75 { {0,13}, {1,13}, {2,13}, {0,0} },
77 { {1,0}, {0,0}, {2,0}, {3,0} },
78 { {0,1}, {1,1}, {2,1}, {3,1} },
79 { {0,2}, {1,2}, {2,2}, {3,2} },
80 { {0,3}, {1,3}, {2,3}, {3,3} },
81 { {0,4}, {1,4}, {2,4}, {3,4} },
82 { {0,5}, {1,5}, {2,5}, {3,5} },
83 { {0,6}, {1,6}, {2,6}, {3,6} }