4 void matrix_init_user(void) {
5 // leave this function blank - it can be defined in a keymap file
9 void matrix_scan_user(void) {
10 // leave this function blank - it can be defined in a keymap file
13 __attribute__ ((weak))
14 bool process_action_user(keyrecord_t *record) {
15 // leave this function blank - it can be defined in a keymap file
19 __attribute__ ((weak))
20 void led_set_user(uint8_t usb_led) {
21 // leave this function blank - it can be defined in a keymap file
24 void matrix_init_kb(void) {
25 // put your keyboard start-up code here
26 // runs once when the firmware starts up
28 #ifdef BACKLIGHT_ENABLE
29 backlight_init_ports();
35 void matrix_scan_kb(void) {
36 // put your looping keyboard code here
37 // runs every cycle (a lot)
42 bool process_action_kb(keyrecord_t *record) {
43 // put your per-action keyboard code here
44 // runs for every action, just before processing by the firmware
46 return process_action_user(record);
49 void led_set_kb(uint8_t usb_led) {
50 // put your keyboard LED indicator (ex: Caps Lock LED) toggling code here
52 led_set_user(usb_led);
55 #ifdef BACKLIGHT_ENABLE
58 void backlight_init_ports()
61 // Setup PB7 as output and output low.
65 // Use full 16-bit resolution.
68 // I could write a wall of text here to explain... but TL;DW
69 // Go read the ATmega32u4 datasheet.
70 // And this: http://blog.saikoled.com/post/43165849837/secret-konami-cheat-code-to-high-resolution-pwm-on
72 // Pin PB7 = OCR1C (Timer 1, Channel C)
73 // Compare Output Mode = Clear on compare match, Channel C = COM1C1=1 COM1C0=0
74 // (i.e. start high, go low when counter matches.)
75 // WGM Mode 14 (Fast PWM) = WGM13=1 WGM12=1 WGM11=1 WGM10=0
76 // Clock Select = clk/1 (no prescaling) = CS12=0 CS11=0 CS10=1
78 TCCR1A = _BV(COM1C1) | _BV(WGM11); // = 0b00001010;
79 TCCR1B = _BV(WGM13) | _BV(WGM12) | _BV(CS10); // = 0b00011001;
84 void backlight_set(uint8_t level)
88 // Turn off PWM control on PB7, revert to output low.
89 TCCR1A &= ~(_BV(COM1C1));
91 // Prevent backlight blink on lowest level
92 PORTB &= ~(_BV(PORTB7));
94 else if ( level == BACKLIGHT_LEVELS )
96 // Prevent backlight blink on lowest level
97 PORTB &= ~(_BV(PORTB7));
98 // Turn on PWM control of PB7
99 TCCR1A |= _BV(COM1C1);
100 // Set the brightness
105 // Prevent backlight blink on lowest level
106 PORTB &= ~(_BV(PORTB7));
107 // Turn on PWM control of PB7
108 TCCR1A |= _BV(COM1C1);
109 // Set the brightness
110 CHANNEL = 0xFFFF >> ((BACKLIGHT_LEVELS - level) * ((BACKLIGHT_LEVELS + 1) / 2));