diff options
Diffstat (limited to 'keyboard/quark/backlight.c')
| -rw-r--r-- | keyboard/quark/backlight.c | 46 | 
1 files changed, 0 insertions, 46 deletions
diff --git a/keyboard/quark/backlight.c b/keyboard/quark/backlight.c deleted file mode 100644 index ee7e31ee9..000000000 --- a/keyboard/quark/backlight.c +++ /dev/null @@ -1,46 +0,0 @@ - -#include <avr/io.h> -#include "backlight.h" - - -void backlight_init_ports() -{ -    // Setup PB7 as output and output low. -    DDRB |= (1<<7); -    PORTB &= ~(1<<7); -     -    // Use full 16-bit resolution.  -    ICR1 = 0xFFFF; - -    // I could write a wall of text here to explain... but TL;DW -    // Go read the ATmega32u4 datasheet. -    // And this: http://blog.saikoled.com/post/43165849837/secret-konami-cheat-code-to-high-resolution-pwm-on -     -    // Pin PB7 = OCR1C (Timer 1, Channel C) -    // Compare Output Mode = Clear on compare match, Channel C = COM1C1=1 COM1C0=0 -    // (i.e. start high, go low when counter matches.) -    // WGM Mode 14 (Fast PWM) = WGM13=1 WGM12=1 WGM11=1 WGM10=0 -    // Clock Select = clk/1 (no prescaling) = CS12=0 CS11=0 CS10=1 -     -    TCCR1A = _BV(COM1C1) | _BV(WGM11); // = 0b00001010; -    TCCR1B = _BV(WGM13) | _BV(WGM12) | _BV(CS10); // = 0b00011001; -     -    // Default to zero duty cycle. -    OCR1C = 0x0000; -} - -void backlight_set(uint8_t level) -{ -    if ( level == 0 ) -    { -        // Turn off PWM control on PB7, revert to output low. -        TCCR1A &= ~(_BV(COM1C1)); -    } -    else -    { -        // Turn on PWM control of PB7 -        TCCR1A |= _BV(COM1C1); -        OCR1C = level << 12 | 0x0FFF; -    } -} -  | 
