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adds backlight levels to the satan keyboard (#431)

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* enable 4 levels

* remove breathing stuff

* update channels, comments, hex
This commit is contained in:
Jack Humbert 2016-06-21 22:09:41 -04:00 committed by GitHub
parent e329729d3a
commit 464c8e274f
5 changed files with 61 additions and 31 deletions
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4
keyboard/satan/Makefile
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@ -68,10 +68,6 @@ AUDIO_ENABLE ?= no
UNICODE_ENABLE ?= no # Unicode
BLUETOOTH_ENABLE ?= no # Enable Bluetooth with the Adafruit EZ-Key HID
#ifdef BACKLIGHT_ENABLE
SRC := backlight.c $(SRC)
#endif
ifndef QUANTUM_DIR
include ../../Makefile
endif

24
keyboard/satan/backlight.c
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@ -1,24 +0,0 @@
#include <avr/io.h>
#include "backlight.h"
#include "print.h"
void init_backlight_pin(void) {
print("init_backlight_pin()\n");
// Set our LED pins as output
DDRB |= (1<<6);
// Set our LED pins low
PORTB &= ~(1<<6);
}
void backlight_set(uint8_t level) {
if ( level == 0 ) {
// Turn off light
PORTB |= (1<<6);
} else {
// Turn on light
PORTB &= ~(1<<6);
}
}

2
keyboard/satan/config.h
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@ -59,7 +59,7 @@ along with this program. If not, see <http://www.gnu.org/licenses/>.
/* Backlight configuration
*/
#define BACKLIGHT_LEVELS 1
#define BACKLIGHT_LEVELS 4
/* Underlight configuration
*/

BIN
keyboard/satan/keymaps/default/compiled.hex
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62
keyboard/satan/satan.c
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@ -14,6 +14,64 @@ 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
@ -23,7 +81,7 @@ void matrix_init_kb(void) {
led_init_ports();
#ifdef BACKLIGHT_ENABLE
init_backlight_pin();
backlight_init_ports();
#endif
};
@ -33,4 +91,4 @@ void matrix_scan_kb(void) {
if (matrix_scan_user) {
(*matrix_scan_user)();
}
};
};