Backlight Breathing for Planck and Atomic
* Updated personal layouts * tweaked personal * Nightly - Audio Cleanup Refactored the LUTs. Abstracted some of the registers out of audio to use more functional names. Split audio into audio and audio_pwm. WIP * nightly - collapsed code * Added check for note playing to LEDs * Usability tweaks * TWEAE * nightly added extra kcs to keymap common * turned on Plank audio * Added backlight breathing to atomic * reverted accidental merge * adds backlight pulse to planck
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					 21 changed files with 1153 additions and 201 deletions
				
			
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			@ -9,6 +9,9 @@ void matrix_scan_user(void) {}
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__attribute__ ((weak))
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void process_action_user(keyrecord_t *record) {}
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__attribute__ ((weak))
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void led_set_user(uint8_t usb_led) {}
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void matrix_init_kb(void) {
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#ifdef BACKLIGHT_ENABLE
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	backlight_init_ports();
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			@ -33,8 +36,22 @@ void process_action_kb(keyrecord_t *record) {
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	process_action_user(record);
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}
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void led_set_kb(uint8_t usb_led) {
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    // put your keyboard LED indicator (ex: Caps Lock LED) toggling code here
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    led_set_user(usb_led);
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}
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#ifdef BACKLIGHT_ENABLE
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#define CHANNEL OCR1C
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#define BREATHING_NO_HALT  0
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#define BREATHING_HALT_OFF 1
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#define BREATHING_HALT_ON  2
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static uint8_t breath_intensity;
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static uint8_t breath_speed;
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static uint16_t breathing_index;
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static uint8_t breathing_halt;
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void backlight_init_ports()
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{
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			@ -60,22 +77,22 @@ void backlight_init_ports()
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    TCCR1B = _BV(WGM13) | _BV(WGM12) | _BV(CS10); // = 0b00011001;
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    backlight_init();
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    breathing_defaults();
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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(PORTB7));
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    if ( level == 0 )
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    {
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        // Turn off PWM control on PB7, revert to output low.
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        TCCR1A &= ~(_BV(COM1C1));
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        CHANNEL = 0x0;
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        // Prevent backlight blink on lowest level
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        PORTB &= ~(_BV(PORTB7));
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    }
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    else if ( level == BACKLIGHT_LEVELS )
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    {
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        // Prevent backlight blink on lowest level
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        PORTB &= ~(_BV(PORTB7));
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        // Turn on PWM control of PB7
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        TCCR1A |= _BV(COM1C1);
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        // Set the brightness
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			@ -83,13 +100,205 @@ void backlight_set(uint8_t level)
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    }
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    else        
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    {
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        // Prevent backlight blink on lowest level
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        PORTB &= ~(_BV(PORTB7));
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        // Turn on PWM control of PB7
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        TCCR1A |= _BV(COM1C1);
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        // Set the brightness
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        CHANNEL = 0xFFFF >> ((BACKLIGHT_LEVELS - level) * ((BACKLIGHT_LEVELS + 1) / 2));
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    }
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    breathing_intensity_default();
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}
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void breathing_enable(void)
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{
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    if (get_backlight_level() == 0)
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    {
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        breathing_index = 0;
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    }
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    else
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    {
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        // Set breathing_index to be at the midpoint (brightest point)
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        breathing_index = 0x20 << breath_speed;
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    }
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    breathing_halt = BREATHING_NO_HALT;
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    // Enable breathing interrupt
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    TIMSK1 |= _BV(OCIE1A);
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}
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void breathing_pulse(void)
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{
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    if (get_backlight_level() == 0)
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    {
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        breathing_index = 0;
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    }
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    else
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    {
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        // Set breathing_index to be at the midpoint + 1 (brightest point)
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        breathing_index = 0x21 << breath_speed;
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    }
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    breathing_halt = BREATHING_HALT_ON;
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    // Enable breathing interrupt
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    TIMSK1 |= _BV(OCIE1A);
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}
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void breathing_disable(void)
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{
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    // Disable breathing interrupt
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    TIMSK1 &= ~_BV(OCIE1A);
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    backlight_set(get_backlight_level());
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}
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void breathing_self_disable(void)
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{
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    if (get_backlight_level() == 0)
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    {
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        breathing_halt = BREATHING_HALT_OFF;
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    }
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    else
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    {
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        breathing_halt = BREATHING_HALT_ON;
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    }
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    //backlight_set(get_backlight_level());
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}
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void breathing_toggle(void)
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{
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    if (!is_breathing())
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    {
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        if (get_backlight_level() == 0)
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        {
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            breathing_index = 0;
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        }
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        else
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        {
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            // Set breathing_index to be at the midpoint + 1 (brightest point)
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            breathing_index = 0x21 << breath_speed;
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        }
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        breathing_halt = BREATHING_NO_HALT;
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    }
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    // Toggle breathing interrupt
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    TIMSK1 ^= _BV(OCIE1A);
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    // Restore backlight level
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    if (!is_breathing())
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    {
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        backlight_set(get_backlight_level());
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    }
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}
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bool is_breathing(void)
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{
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    return (TIMSK1 && _BV(OCIE1A));
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}
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void breathing_intensity_default(void)
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{
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    //breath_intensity = (uint8_t)((uint16_t)100 * (uint16_t)get_backlight_level() / (uint16_t)BACKLIGHT_LEVELS);
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    breath_intensity = ((BACKLIGHT_LEVELS - get_backlight_level()) * ((BACKLIGHT_LEVELS + 1) / 2));
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}
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void breathing_intensity_set(uint8_t value)
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{
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    breath_intensity = value;
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}
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void breathing_speed_default(void)
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{
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    breath_speed = 4;
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}
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void breathing_speed_set(uint8_t value)
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{
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    bool is_breathing_now = is_breathing();
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    uint8_t old_breath_speed = breath_speed;
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    if (is_breathing_now)
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    {
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        // Disable breathing interrupt
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        TIMSK1 &= ~_BV(OCIE1A);
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    }
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    breath_speed = value;
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    if (is_breathing_now)
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    {
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        // Adjust index to account for new speed
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        breathing_index = (( (uint8_t)( (breathing_index) >> old_breath_speed ) ) & 0x3F) << breath_speed;
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        // Enable breathing interrupt
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        TIMSK1 |= _BV(OCIE1A);
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    }
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}
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void breathing_speed_inc(uint8_t value)
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{
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    if ((uint16_t)(breath_speed - value) > 10 )
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    {
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        breathing_speed_set(0);
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    }
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    else
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    {
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        breathing_speed_set(breath_speed - value);
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    }
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}
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void breathing_speed_dec(uint8_t value)
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{
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    if ((uint16_t)(breath_speed + value) > 10 )
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    {
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        breathing_speed_set(10);
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    }
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    else
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    {
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        breathing_speed_set(breath_speed + value);
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    }
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}
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void breathing_defaults(void)
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{
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    breathing_intensity_default();
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    breathing_speed_default();
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    breathing_halt = BREATHING_NO_HALT;
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}
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/* Breathing Sleep LED brighness(PWM On period) table
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 * (64[steps] * 4[duration]) / 64[PWM periods/s] = 4 second breath cycle
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 *
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 * http://www.wolframalpha.com/input/?i=%28sin%28+x%2F64*pi%29**8+*+255%2C+x%3D0+to+63
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 * (0..63).each {|x| p ((sin(x/64.0*PI)**8)*255).to_i }
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 */
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static const uint8_t breathing_table[64] PROGMEM = {
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  0,   0,   0,   0,   0,   0,   0,   0,   0,   0,   0,   1,   2,   4,   6,  10,
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 15,  23,  32,  44,  58,  74,  93, 113, 135, 157, 179, 199, 218, 233, 245, 252,
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255, 252, 245, 233, 218, 199, 179, 157, 135, 113,  93,  74,  58,  44,  32,  23,
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 15,  10,   6,   4,   2,   1,   0,   0,   0,   0,   0,   0,   0,   0,   0,   0,
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};
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ISR(TIMER1_COMPA_vect)
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{
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    // CHANNEL = (pgm_read_byte(&breathing_table[ ( (uint8_t)( (breathing_index++) >> breath_speed ) ) & 0x3F ] )) * breath_intensity;
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    uint8_t local_index = ( (uint8_t)( (breathing_index++) >> breath_speed ) ) & 0x3F;
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    if (((breathing_halt == BREATHING_HALT_ON) && (local_index == 0x20)) || ((breathing_halt == BREATHING_HALT_OFF) && (local_index == 0x3F)))
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    {
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        // Disable breathing interrupt
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        TIMSK1 &= ~_BV(OCIE1A);
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    }
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    CHANNEL = (uint16_t)(((uint16_t)pgm_read_byte(&breathing_table[local_index]) * 257)) >> breath_intensity;
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}
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#endif
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