1 #include "ergodox_ez.h"
4 bool i2c_initialized = 0;
5 uint8_t mcp23018_status = 0x20;
7 bool ergodox_left_led_1 = 0; // left top
8 bool ergodox_left_led_2 = 0; // left middle
9 bool ergodox_left_led_3 = 0; // left bottom
11 __attribute__ ((weak))
12 void * matrix_init_user(void) {
16 __attribute__ ((weak))
17 void * matrix_scan_user(void) {
21 void * matrix_init_kb(void) {
22 // keyboard LEDs (see "PWM on ports OC1(A|B|C)" in "teensy-2-0.md")
23 TCCR1A = 0b10101001; // set and configure fast PWM
24 TCCR1B = 0b00001001; // set and configure fast PWM
26 // (tied to Vcc for hardware convenience)
27 DDRB &= ~(1<<4); // set B(4) as input
28 PORTB &= ~(1<<4); // set B(4) internal pull-up disabled
30 // unused pins - C7, D4, D5, D7, E6
31 // set as input with internal pull-ip enabled
33 DDRD &= ~(1<<7 | 1<<5 | 1<<4);
36 PORTD |= (1<<7 | 1<<5 | 1<<4);
39 ergodox_blink_all_leds();
41 if (matrix_init_user) {
42 (*matrix_init_user)();
46 void * matrix_scan_kb(void) {
48 if (matrix_scan_user) {
49 (*matrix_scan_user)();
54 void ergodox_blink_all_leds(void)
56 ergodox_led_all_off();
57 ergodox_led_all_set(LED_BRIGHTNESS_HI);
60 ergodox_led_all_off();
63 uint8_t init_mcp23018(void) {
64 mcp23018_status = 0x20;
67 if (i2c_initialized == 0) {
68 i2c_init(); // on pins D(1,0)
74 // - unused : input : 1
75 // - input : input : 1
76 // - driving : output : 0
77 mcp23018_status = i2c_start(I2C_ADDR_WRITE); if (mcp23018_status) goto out;
78 mcp23018_status = i2c_write(IODIRA); if (mcp23018_status) goto out;
79 mcp23018_status = i2c_write(0b00000000); if (mcp23018_status) goto out;
80 mcp23018_status = i2c_write(0b00111111); if (mcp23018_status) goto out;
86 // - driving : off : 0
87 mcp23018_status = i2c_start(I2C_ADDR_WRITE); if (mcp23018_status) goto out;
88 mcp23018_status = i2c_write(GPPUA); if (mcp23018_status) goto out;
89 mcp23018_status = i2c_write(0b00000000); if (mcp23018_status) goto out;
90 mcp23018_status = i2c_write(0b00111111); if (mcp23018_status) goto out;
95 if (!mcp23018_status) mcp23018_status = ergodox_left_leds_update();
97 return mcp23018_status;
100 uint8_t ergodox_left_leds_update(void) {
101 if (mcp23018_status) { // if there was an error
102 return mcp23018_status;
105 // set logical value (doesn't matter on inputs)
106 // - unused : hi-Z : 1
107 // - input : hi-Z : 1
108 // - driving : hi-Z : 1
109 mcp23018_status = i2c_start(I2C_ADDR_WRITE); if (mcp23018_status) goto out;
110 mcp23018_status = i2c_write(OLATA); if (mcp23018_status) goto out;
111 mcp23018_status = i2c_write(0b11111111
112 & ~(ergodox_left_led_3<<LEFT_LED_3_SHIFT)
113 ); if (mcp23018_status) goto out;
114 mcp23018_status = i2c_write(0b11111111
115 & ~(ergodox_left_led_2<<LEFT_LED_2_SHIFT)
116 & ~(ergodox_left_led_1<<LEFT_LED_1_SHIFT)
117 ); if (mcp23018_status) goto out;
121 return mcp23018_status;