4 bool i2c_initialized = 0;
5 uint8_t mcp23018_status = 0x20;
7 void matrix_init_kb(void) {
8 // keyboard LEDs (see "PWM on ports OC1(A|B|C)" in "teensy-2-0.md")
9 TCCR1A = 0b10101001; // set and configure fast PWM
10 TCCR1B = 0b00001001; // set and configure fast PWM
12 // (tied to Vcc for hardware convenience)
13 DDRB &= ~(1<<4); // set B(4) as input
14 PORTB &= ~(1<<4); // set B(4) internal pull-up disabled
16 // unused pins - C7, D4, D5, D7, E6
17 // set as input with internal pull-ip enabled
19 DDRD &= ~(1<<7 | 1<<5 | 1<<4);
22 PORTD |= (1<<7 | 1<<5 | 1<<4);
25 ergodox_blink_all_leds();
30 void ergodox_blink_all_leds(void)
32 ergodox_led_all_off();
33 ergodox_led_all_set(LED_BRIGHTNESS_HI);
34 ergodox_right_led_1_on();
36 ergodox_right_led_2_on();
38 ergodox_right_led_3_on();
40 ergodox_right_led_1_off();
42 ergodox_right_led_2_off();
44 ergodox_right_led_3_off();
45 //ergodox_led_all_on();
47 ergodox_led_all_off();
50 uint8_t init_mcp23018(void) {
51 mcp23018_status = 0x20;
54 if (i2c_initialized == 0) {
55 i2c_init(); // on pins D(1,0)
61 // - unused : input : 1
62 // - input : input : 1
63 // - driving : output : 0
64 mcp23018_status = i2c_start(I2C_ADDR_WRITE); if (mcp23018_status) goto out;
65 mcp23018_status = i2c_write(IODIRA); if (mcp23018_status) goto out;
66 mcp23018_status = i2c_write(0b00000000); if (mcp23018_status) goto out;
67 mcp23018_status = i2c_write(0b00111111); if (mcp23018_status) goto out;
73 // - driving : off : 0
74 mcp23018_status = i2c_start(I2C_ADDR_WRITE); if (mcp23018_status) goto out;
75 mcp23018_status = i2c_write(GPPUA); if (mcp23018_status) goto out;
76 mcp23018_status = i2c_write(0b00000000); if (mcp23018_status) goto out;
77 mcp23018_status = i2c_write(0b00111111); if (mcp23018_status) goto out;
82 return mcp23018_status;