4 void matrix_init_user(void) {
9 void matrix_scan_user(void) {
15 void backlight_init_ports(void)
18 // Setup PB7 as output and output low.
22 // Use full 16-bit resolution.
25 // I could write a wall of text here to explain... but TL;DW
26 // Go read the ATmega32u4 datasheet.
27 // And this: http://blog.saikoled.com/post/43165849837/secret-konami-cheat-code-to-high-resolution-pwm-on
29 // Pin PB7 = OCR1C (Timer 1, Channel C)
30 // Compare Output Mode = Clear on compare match, Channel C = COM1C1=1 COM1C0=0
31 // (i.e. start high, go low when counter matches.)
32 // WGM Mode 14 (Fast PWM) = WGM13=1 WGM12=1 WGM11=1 WGM10=0
33 // Clock Select = clk/1 (no prescaling) = CS12=0 CS11=0 CS10=1
35 TCCR1A = _BV(COM1C1) | _BV(WGM11); // = 0b00001010;
36 TCCR1B = _BV(WGM13) | _BV(WGM12) | _BV(CS10); // = 0b00011001;
41 void backlight_set(uint8_t level)
45 // Turn off PWM control on PB7, revert to output low.
46 TCCR1A &= ~(_BV(COM1C1));
48 // Prevent backlight blink on lowest level
49 PORTB &= ~(_BV(PORTB7));
51 else if ( level == BACKLIGHT_LEVELS )
53 // Prevent backlight blink on lowest level
54 PORTB &= ~(_BV(PORTB7));
55 // Turn on PWM control of PB7
56 TCCR1A |= _BV(COM1C1);
62 // Prevent backlight blink on lowest level
63 PORTB &= ~(_BV(PORTB7));
64 // Turn on PWM control of PB7
65 TCCR1A |= _BV(COM1C1);
67 CHANNEL = 0xFFFF >> ((BACKLIGHT_LEVELS - level) * ((BACKLIGHT_LEVELS + 1) / 2));
71 void matrix_init_kb(void) {
72 #ifdef BACKLIGHT_ENABLE
73 backlight_init_ports();
79 void matrix_scan_kb(void) {