adds backlight levels to the satan keyboard (#431)
* enable 4 levels * remove breathing stuff * update channels, comments, hex
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e329729d3a
commit
464c8e274f
5 changed files with 61 additions and 31 deletions
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@ -68,10 +68,6 @@ AUDIO_ENABLE ?= no
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UNICODE_ENABLE ?= no # Unicode
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BLUETOOTH_ENABLE ?= no # Enable Bluetooth with the Adafruit EZ-Key HID
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#ifdef BACKLIGHT_ENABLE
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SRC := backlight.c $(SRC)
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#endif
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ifndef QUANTUM_DIR
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include ../../Makefile
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endif
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@ -1,24 +0,0 @@
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#include <avr/io.h>
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#include "backlight.h"
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#include "print.h"
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void init_backlight_pin(void) {
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print("init_backlight_pin()\n");
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// Set our LED pins as output
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DDRB |= (1<<6);
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// Set our LED pins low
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PORTB &= ~(1<<6);
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}
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void backlight_set(uint8_t level) {
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if ( level == 0 ) {
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// Turn off light
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PORTB |= (1<<6);
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} else {
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// Turn on light
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PORTB &= ~(1<<6);
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}
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}
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@ -59,7 +59,7 @@ along with this program. If not, see <http://www.gnu.org/licenses/>.
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/* Backlight configuration
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*/
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#define BACKLIGHT_LEVELS 1
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#define BACKLIGHT_LEVELS 4
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/* Underlight configuration
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*/
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Binary file not shown.
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@ -14,6 +14,64 @@ void matrix_scan_user(void) {
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// leave these blank
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};
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#ifdef BACKLIGHT_ENABLE
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void backlight_init_ports()
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{
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// Setup PB6 as output and output low.
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DDRB |= (1<<6);
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PORTB &= ~(1<<6);
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// Use full 16-bit resolution.
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ICR1 = 0xFFFF;
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// I could write a wall of text here to explain... but TL;DW
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// Go read the ATmega32u4 datasheet.
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// And this: http://blog.saikoled.com/post/43165849837/secret-konami-cheat-code-to-high-resolution-pwm-on
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// Pin PB6 = OCR1B (Timer 1, Channel C)
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// Compare Output Mode = Clear on compare match, Channel C = COM1C1=1 COM1C0=0
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// (i.e. start high, go low when counter matches.)
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// WGM Mode 14 (Fast PWM) = WGM13=1 WGM12=1 WGM11=1 WGM10=0
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// Clock Select = clk/1 (no prescaling) = CS12=0 CS11=0 CS10=1
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TCCR1A = _BV(COM1B1) | _BV(WGM11); // = 0b00001010;
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TCCR1B = _BV(WGM13) | _BV(WGM12) | _BV(CS10); // = 0b00011001;
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backlight_init();
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}
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void backlight_set(uint8_t level)
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{
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// Prevent backlight blink on lowest level
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PORTB &= ~(_BV(PORTB6));
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if ( level == 0 )
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{
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// Turn off PWM control on PB6, revert to output low.
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TCCR1A &= ~(_BV(COM1B1));
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OCR1B = 0x0;
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}
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else if ( level == BACKLIGHT_LEVELS )
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{
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// Turn on PWM control of PB6
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TCCR1A |= _BV(COM1B1);
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// Set the brightness
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OCR1B = 0xFFFF;
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}
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else
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{
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// Turn on PWM control of PB6
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TCCR1A |= _BV(COM1B1);
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// Set the brightness
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OCR1B = 0xFFFF >> ((BACKLIGHT_LEVELS - level) * ((BACKLIGHT_LEVELS + 1) / 2));
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}
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}
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#endif
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void matrix_init_kb(void) {
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// put your keyboard start-up code here
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// runs once when the firmware starts up
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@ -23,7 +81,7 @@ void matrix_init_kb(void) {
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led_init_ports();
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#ifdef BACKLIGHT_ENABLE
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init_backlight_pin();
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backlight_init_ports();
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#endif
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};
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@ -33,4 +91,4 @@ void matrix_scan_kb(void) {
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if (matrix_scan_user) {
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(*matrix_scan_user)();
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}
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};
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};
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