diff options
Diffstat (limited to 'keyboards/satan/satan.c')
| -rw-r--r-- | keyboards/satan/satan.c | 94 |
1 files changed, 94 insertions, 0 deletions
diff --git a/keyboards/satan/satan.c b/keyboards/satan/satan.c new file mode 100644 index 0000000000..092eb4665d --- /dev/null +++ b/keyboards/satan/satan.c @@ -0,0 +1,94 @@ +#include "satan.h" + +#ifdef BACKLIGHT_ENABLE +#include "backlight.h" +#endif + +__attribute__ ((weak)) +void matrix_init_user(void) { + // leave these blank +}; + +__attribute__ ((weak)) +void matrix_scan_user(void) { + // leave these blank +}; + + +#ifdef BACKLIGHT_ENABLE + +void backlight_init_ports() +{ + + // Setup PB6 as output and output low. + DDRB |= (1<<6); + PORTB &= ~(1<<6); + + // 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 PB6 = OCR1B (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(COM1B1) | _BV(WGM11); // = 0b00001010; + TCCR1B = _BV(WGM13) | _BV(WGM12) | _BV(CS10); // = 0b00011001; + + backlight_init(); +} + +void backlight_set(uint8_t level) +{ + // Prevent backlight blink on lowest level + PORTB &= ~(_BV(PORTB6)); + + if ( level == 0 ) + { + // Turn off PWM control on PB6, revert to output low. + TCCR1A &= ~(_BV(COM1B1)); + OCR1B = 0x0; + } + else if ( level == BACKLIGHT_LEVELS ) + { + // Turn on PWM control of PB6 + TCCR1A |= _BV(COM1B1); + // Set the brightness + OCR1B = 0xFFFF; + } + else + { + // Turn on PWM control of PB6 + TCCR1A |= _BV(COM1B1); + // Set the brightness + OCR1B = 0xFFFF >> ((BACKLIGHT_LEVELS - level) * ((BACKLIGHT_LEVELS + 1) / 2)); + } +} + +#endif + +void matrix_init_kb(void) { + // put your keyboard start-up code here + // runs once when the firmware starts up + if (matrix_init_user) { + (*matrix_init_user)(); + } + led_init_ports(); + + #ifdef BACKLIGHT_ENABLE + backlight_init_ports(); + #endif +}; + +void matrix_scan_kb(void) { + // put your looping keyboard code here + // runs every cycle (a lot) + if (matrix_scan_user) { + (*matrix_scan_user)(); + } +};
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