1 files changed, 325 insertions, 0 deletions

diff --git a/keyboards/atomic/atomic.c b/keyboards/atomic/atomic.c
new file mode 100644
index 000000000..fa218a48f
--- /dev/null
+++ b/keyboards/atomic/atomic.c
@@ -0,0 +1,325 @@
+#include "atomic.h"
+
+__attribute__ ((weak))
+void matrix_init_user(void) {
+    // leave this function blank - it can be defined in a keymap file
+};
+
+__attribute__ ((weak))
+void matrix_scan_user(void) {
+    // leave this function blank - it can be defined in a keymap file
+}
+
+__attribute__ ((weak))
+bool process_action_user(keyrecord_t *record) {
+    // leave this function blank - it can be defined in a keymap file
+    return true;
+}
+
+__attribute__ ((weak))
+void led_set_user(uint8_t usb_led) {
+    // leave this function blank - it can be defined in a keymap file
+}
+
+void matrix_init_kb(void) {
+    // put your keyboard start-up code here
+    // runs once when the firmware starts up
+
+    MCUCR |= (1<<JTD);
+    MCUCR |= (1<<JTD);
+
+#ifdef BACKLIGHT_ENABLE
+    backlight_init_ports();
+#endif
+
+    // Turn status LED on
+    DDRE |= (1<<6);
+    PORTE |= (1<<6);
+
+    matrix_init_user();
+}
+
+void matrix_scan_kb(void) {
+    // put your looping keyboard code here
+    // runs every cycle (a lot)
+
+    matrix_scan_user();
+}
+
+bool process_action_kb(keyrecord_t *record) {
+    // put your per-action keyboard code here
+    // runs for every action, just before processing by the firmware
+
+    return process_action_user(record);
+}
+
+void led_set_kb(uint8_t usb_led) {
+    // put your keyboard LED indicator (ex: Caps Lock LED) toggling code here
+
+    led_set_user(usb_led);
+}
+
+#ifdef BACKLIGHT_ENABLE
+#define CHANNEL OCR1C
+#define BREATHING_NO_HALT  0
+#define BREATHING_HALT_OFF 1
+#define BREATHING_HALT_ON  2
+
+static uint8_t breath_intensity;
+static uint8_t breath_speed;
+static uint16_t breathing_index;
+static uint8_t breathing_halt;
+
+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();
+    breathing_defaults();
+}
+
+void backlight_set(uint8_t level)
+{
+    // Prevent backlight blink on lowest level
+    PORTB &= ~(_BV(PORTB7));
+
+    if ( level == 0 )
+    {
+        // Turn off PWM control on PB7, revert to output low.
+        TCCR1A &= ~(_BV(COM1C1));
+
+        // Set the brightness to 0
+        CHANNEL = 0x0;
+    }
+    else if ( level >= BACKLIGHT_LEVELS )
+    {
+        // Turn on PWM control of PB7
+        TCCR1A |= _BV(COM1C1);
+
+        // Set the brightness to max
+        CHANNEL = 0xFFFF;
+    }
+    else
+    {
+        // Turn on PWM control of PB7
+        TCCR1A |= _BV(COM1C1);
+
+        // Set the brightness
+        CHANNEL = 0xFFFF >> ((BACKLIGHT_LEVELS - level) * ((BACKLIGHT_LEVELS + 1) / 2));
+    }
+    breathing_intensity_default();
+}
+
+
+void breathing_enable(void)
+{
+    if (get_backlight_level() == 0)
+    {
+        breathing_index = 0;
+    }
+    else
+    {
+        // Set breathing_index to be at the midpoint (brightest point)
+        breathing_index = 0x20 << breath_speed;
+    }
+
+    breathing_halt = BREATHING_NO_HALT;
+
+    // Enable breathing interrupt
+    TIMSK1 |= _BV(OCIE1A);
+}
+
+void breathing_pulse(void)
+{
+    if (get_backlight_level() == 0)
+    {
+        breathing_index = 0;
+    }
+    else
+    {
+        // Set breathing_index to be at the midpoint + 1 (brightest point)
+        breathing_index = 0x21 << breath_speed;
+    }
+
+    breathing_halt = BREATHING_HALT_ON;
+
+    // Enable breathing interrupt
+    TIMSK1 |= _BV(OCIE1A);
+}
+
+void breathing_disable(void)
+{
+    // Disable breathing interrupt
+    TIMSK1 &= ~_BV(OCIE1A);
+    backlight_set(get_backlight_level());
+}
+
+void breathing_self_disable(void)
+{
+    if (get_backlight_level() == 0)
+    {
+        breathing_halt = BREATHING_HALT_OFF;
+    }
+    else
+    {
+        breathing_halt = BREATHING_HALT_ON;
+    }
+
+    //backlight_set(get_backlight_level());
+}
+
+void breathing_toggle(void)
+{
+    if (!is_breathing())
+    {
+        if (get_backlight_level() == 0)
+        {
+            breathing_index = 0;
+        }
+        else
+        {
+            // Set breathing_index to be at the midpoint + 1 (brightest point)
+            breathing_index = 0x21 << breath_speed;
+        }
+
+        breathing_halt = BREATHING_NO_HALT;
+    }
+
+    // Toggle breathing interrupt
+    TIMSK1 ^= _BV(OCIE1A);
+
+    // Restore backlight level
+    if (!is_breathing())
+    {
+        backlight_set(get_backlight_level());
+    }
+}
+
+bool is_breathing(void)
+{
+    return (TIMSK1 && _BV(OCIE1A));
+}
+
+void breathing_intensity_default(void)
+{
+    //breath_intensity = (uint8_t)((uint16_t)100 * (uint16_t)get_backlight_level() / (uint16_t)BACKLIGHT_LEVELS);
+    breath_intensity = ((BACKLIGHT_LEVELS - get_backlight_level()) * ((BACKLIGHT_LEVELS + 1) / 2));
+}
+
+void breathing_intensity_set(uint8_t value)
+{
+    breath_intensity = value;
+}
+
+void breathing_speed_default(void)
+{
+    breath_speed = 4;
+}
+
+void breathing_speed_set(uint8_t value)
+{
+    bool is_breathing_now = is_breathing();
+    uint8_t old_breath_speed = breath_speed;
+
+    if (is_breathing_now)
+    {
+        // Disable breathing interrupt
+        TIMSK1 &= ~_BV(OCIE1A);
+    }
+
+    breath_speed = value;
+
+    if (is_breathing_now)
+    {
+        // Adjust index to account for new speed
+        breathing_index = (( (uint8_t)( (breathing_index) >> old_breath_speed ) ) & 0x3F) << breath_speed;
+
+        // Enable breathing interrupt
+        TIMSK1 |= _BV(OCIE1A);
+    }
+
+}
+
+void breathing_speed_inc(uint8_t value)
+{
+    if ((uint16_t)(breath_speed - value) > 10 )
+    {
+        breathing_speed_set(0);
+    }
+    else
+    {
+        breathing_speed_set(breath_speed - value);
+    }
+}
+
+void breathing_speed_dec(uint8_t value)
+{
+    if ((uint16_t)(breath_speed + value) > 10 )
+    {
+        breathing_speed_set(10);
+    }
+    else
+    {
+        breathing_speed_set(breath_speed + value);
+    }
+}
+
+void breathing_defaults(void)
+{
+    breathing_intensity_default();
+    breathing_speed_default();
+    breathing_halt = BREATHING_NO_HALT;
+}
+
+/* Breathing Sleep LED brighness(PWM On period) table
+ * (64[steps] * 4[duration]) / 64[PWM periods/s] = 4 second breath cycle
+ *
+ * http://www.wolframalpha.com/input/?i=%28sin%28+x%2F64*pi%29**8+*+255%2C+x%3D0+to+63
+ * (0..63).each {|x| p ((sin(x/64.0*PI)**8)*255).to_i }
+ */
+static const uint8_t breathing_table[64] PROGMEM = {
+  0,   0,   0,   0,   0,   0,   0,   0,   0,   0,   0,   1,   2,   4,   6,  10,
+ 15,  23,  32,  44,  58,  74,  93, 113, 135, 157, 179, 199, 218, 233, 245, 252,
+255, 252, 245, 233, 218, 199, 179, 157, 135, 113,  93,  74,  58,  44,  32,  23,
+ 15,  10,   6,   4,   2,   1,   0,   0,   0,   0,   0,   0,   0,   0,   0,   0,
+};
+
+ISR(TIMER1_COMPA_vect)
+{
+    // CHANNEL = (pgm_read_byte(&breathing_table[ ( (uint8_t)( (breathing_index++) >> breath_speed ) ) & 0x3F ] )) * breath_intensity;
+
+
+    uint8_t local_index = ( (uint8_t)( (breathing_index++) >> breath_speed ) ) & 0x3F;
+
+    if (((breathing_halt == BREATHING_HALT_ON) && (local_index == 0x20)) || ((breathing_halt == BREATHING_HALT_OFF) && (local_index == 0x3F)))
+    {
+        // Disable breathing interrupt
+        TIMSK1 &= ~_BV(OCIE1A);
+    }
+
+    CHANNEL = (uint16_t)(((uint16_t)pgm_read_byte(&breathing_table[local_index]) * 257)) >> breath_intensity;
+
+}
+
+
+
+#endif
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