diff options
Diffstat (limited to 'keyboard/preonic')
| -rw-r--r-- | keyboard/preonic/Makefile | 5 | ||||
| -rw-r--r-- | keyboard/preonic/backlight.c | 61 | ||||
| -rw-r--r-- | keyboard/preonic/preonic.c | 63 | ||||
| -rw-r--r-- | keyboard/preonic/preonic.h | 1 |
4 files changed, 63 insertions, 67 deletions
diff --git a/keyboard/preonic/Makefile b/keyboard/preonic/Makefile index 3504e27201..259dd6686b 100644 --- a/keyboard/preonic/Makefile +++ b/keyboard/preonic/Makefile @@ -162,11 +162,6 @@ endif endif -ifeq ($(strip $(BACKLIGHT_ENABLE)), yes) - SRC := backlight.c $(SRC) -endif - - # Optimize size but this may cause error "relocation truncated to fit" #EXTRALDFLAGS = -Wl,--relax diff --git a/keyboard/preonic/backlight.c b/keyboard/preonic/backlight.c deleted file mode 100644 index f69364b2af..0000000000 --- a/keyboard/preonic/backlight.c +++ /dev/null @@ -1,61 +0,0 @@ - -#include <avr/io.h> -#include "backlight.h" - -#define CHANNEL OCR1C - -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; - - backlight_init(); -} - -void backlight_set(uint8_t level) -{ - if ( level == 0 ) - { - // Turn off PWM control on PB7, revert to output low. - TCCR1A &= ~(_BV(COM1C1)); - CHANNEL = 0x0; - // Prevent backlight blink on lowest level - PORTB &= ~(_BV(PORTB7)); - } - else if ( level == BACKLIGHT_LEVELS ) - { - // Prevent backlight blink on lowest level - PORTB &= ~(_BV(PORTB7)); - // Turn on PWM control of PB7 - TCCR1A |= _BV(COM1C1); - // Set the brightness - CHANNEL = 0xFFFF; - } - else - { - // Prevent backlight blink on lowest level - PORTB &= ~(_BV(PORTB7)); - // Turn on PWM control of PB7 - TCCR1A |= _BV(COM1C1); - // Set the brightness - CHANNEL = 0xFFFF >> ((BACKLIGHT_LEVELS - level) * ((BACKLIGHT_LEVELS + 1) / 2)); - } -}
\ No newline at end of file diff --git a/keyboard/preonic/preonic.c b/keyboard/preonic/preonic.c index f639f247a5..211f8d0296 100644 --- a/keyboard/preonic/preonic.c +++ b/keyboard/preonic/preonic.c @@ -38,4 +38,65 @@ void matrix_scan_kb(void) { void process_action_kb(keyrecord_t *record) { process_action_user(record); -}
\ No newline at end of file +} + +#ifdef BACKLIGHT_ENABLE +#define CHANNEL OCR1C + +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; + + backlight_init(); +} + +void backlight_set(uint8_t level) +{ + if ( level == 0 ) + { + // Turn off PWM control on PB7, revert to output low. + TCCR1A &= ~(_BV(COM1C1)); + CHANNEL = 0x0; + // Prevent backlight blink on lowest level + PORTB &= ~(_BV(PORTB7)); + } + else if ( level == BACKLIGHT_LEVELS ) + { + // Prevent backlight blink on lowest level + PORTB &= ~(_BV(PORTB7)); + // Turn on PWM control of PB7 + TCCR1A |= _BV(COM1C1); + // Set the brightness + CHANNEL = 0xFFFF; + } + else + { + // Prevent backlight blink on lowest level + PORTB &= ~(_BV(PORTB7)); + // Turn on PWM control of PB7 + TCCR1A |= _BV(COM1C1); + // Set the brightness + CHANNEL = 0xFFFF >> ((BACKLIGHT_LEVELS - level) * ((BACKLIGHT_LEVELS + 1) / 2)); + } +} + +#endif
\ No newline at end of file diff --git a/keyboard/preonic/preonic.h b/keyboard/preonic/preonic.h index 51ed9ba393..030acdadb4 100644 --- a/keyboard/preonic/preonic.h +++ b/keyboard/preonic/preonic.h @@ -10,6 +10,7 @@ #include "rgblight.h" #endif #include <stddef.h> +#include <avr/io.h> #ifdef MIDI_ENABLE #include <keymap_midi.h> #endif |