diff options
author | MechMerlin <30334081+mechmerlin@users.noreply.github.com> | 2019-09-21 11:27:53 -0700 |
---|---|---|
committer | Drashna Jaelre <drashna@live.com> | 2019-09-21 11:27:53 -0700 |
commit | fd19795879a92287faa93eb3900ce8d10f89ace3 (patch) | |
tree | 1bc5e25ff2f52e0b1bfd4bd289b164e7a890436a /keyboards/percent/skog/breathing_custom.h | |
parent | f069e9fc09859baf03d940b6db47e95c50a24936 (diff) |
[Keyboard] Move more percent boards into the percent directory (#6781)
* move canoe into percent directory
* update readme for new make path
* move skog into percent directory
* update readme for new path and new instructions
* update readme
* fix error in naming
Diffstat (limited to 'keyboards/percent/skog/breathing_custom.h')
-rw-r--r-- | keyboards/percent/skog/breathing_custom.h | 140 |
1 files changed, 140 insertions, 0 deletions
diff --git a/keyboards/percent/skog/breathing_custom.h b/keyboards/percent/skog/breathing_custom.h new file mode 100644 index 0000000000..71416b1b45 --- /dev/null +++ b/keyboards/percent/skog/breathing_custom.h @@ -0,0 +1,140 @@ +/** + * Breathing effect code for PS2AVRGB boards (ATMEGA32A) + * Works in conjunction with `backlight.c`. + * + * Code adapted from `quantum.c` to register with the existing TIMER1 overflow + * handler in `backlight.c` instead of setting up its own timer. + * Kenneth A. (github.com/krusli | krusli.me) + */ + +#ifdef BACKLIGHT_ENABLE +#ifdef BACKLIGHT_BREATHING + +#include "backlight_custom.h" + +#ifndef BREATHING_PERIOD +#define BREATHING_PERIOD 6 +#endif + +#define breathing_min() do {breathing_counter = 0;} while (0) +#define breathing_max() do {breathing_counter = breathing_period * 244 / 2;} while (0) + +// TODO make this share code with quantum.c + +#define BREATHING_NO_HALT 0 +#define BREATHING_HALT_OFF 1 +#define BREATHING_HALT_ON 2 +#define BREATHING_STEPS 128 + +static uint8_t breathing_period = BREATHING_PERIOD; +static uint8_t breathing_halt = BREATHING_NO_HALT; +static uint16_t breathing_counter = 0; + +static bool breathing = false; + +bool is_breathing(void) { + return breathing; +} + +// See http://jared.geek.nz/2013/feb/linear-led-pwm +static uint16_t cie_lightness(uint16_t v) { + if (v <= 5243) // if below 8% of max + return v / 9; // same as dividing by 900% + else { + uint32_t y = (((uint32_t) v + 10486) << 8) / (10486 + 0xFFFFUL); // add 16% of max and compare + // to get a useful result with integer division, we shift left in the expression above + // and revert what we've done again after squaring. + y = y * y * y >> 8; + if (y > 0xFFFFUL) // prevent overflow + return 0xFFFFU; + else + return (uint16_t) y; + } +} + +void breathing_enable(void) { + breathing = true; + breathing_counter = 0; + breathing_halt = BREATHING_NO_HALT; + // interrupt already registered +} + +void breathing_pulse(void) { + if (get_backlight_level() == 0) + breathing_min(); + else + breathing_max(); + breathing_halt = BREATHING_HALT_ON; + // breathing_interrupt_enable(); + breathing = true; +} + +void breathing_disable(void) { + breathing = false; + // backlight_set(get_backlight_level()); + b_led_set(get_backlight_level()); // custom implementation of backlight_set() +} + +void breathing_self_disable(void) +{ + if (get_backlight_level() == 0) + breathing_halt = BREATHING_HALT_OFF; + else + breathing_halt = BREATHING_HALT_ON; +} + +void breathing_toggle(void) { + if (is_breathing()) + breathing_disable(); + else + breathing_enable(); +} + +void breathing_period_set(uint8_t value) +{ + if (!value) + value = 1; + breathing_period = value; +} + +void breathing_period_default(void) { + breathing_period_set(BREATHING_PERIOD); +} + +void breathing_period_inc(void) +{ + breathing_period_set(breathing_period+1); +} + +void breathing_period_dec(void) +{ + breathing_period_set(breathing_period-1); +} + +/* To generate breathing curve in python: + * from math import sin, pi; [int(sin(x/128.0*pi)**4*255) for x in range(128)] + */ +static const uint8_t breathing_table[BREATHING_STEPS] PROGMEM = {0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 1, 1, 2, 3, 4, 5, 6, 8, 10, 12, 15, 17, 20, 24, 28, 32, 36, 41, 46, 51, 57, 63, 70, 76, 83, 91, 98, 106, 113, 121, 129, 138, 146, 154, 162, 170, 178, 185, 193, 200, 207, 213, 220, 225, 231, 235, 240, 244, 247, 250, 252, 253, 254, 255, 254, 253, 252, 250, 247, 244, 240, 235, 231, 225, 220, 213, 207, 200, 193, 185, 178, 170, 162, 154, 146, 138, 129, 121, 113, 106, 98, 91, 83, 76, 70, 63, 57, 51, 46, 41, 36, 32, 28, 24, 20, 17, 15, 12, 10, 8, 6, 5, 4, 3, 2, 1, 1, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0}; + +// Use this before the cie_lightness function. +static inline uint16_t scale_backlight(uint16_t v) { + return v / BACKLIGHT_LEVELS * get_backlight_level(); +} + +void custom_breathing_handler(void) { + uint16_t interval = (uint16_t) breathing_period * 244 / BREATHING_STEPS; + // resetting after one period to prevent ugly reset at overflow. + breathing_counter = (breathing_counter + 1) % (breathing_period * 244); + uint8_t index = breathing_counter / interval % BREATHING_STEPS; + + if (((breathing_halt == BREATHING_HALT_ON) && (index == BREATHING_STEPS / 2)) || + ((breathing_halt == BREATHING_HALT_OFF) && (index == BREATHING_STEPS - 1))) + { + // breathing_interrupt_disable(); + } + + setPWM(cie_lightness(scale_backlight((uint16_t) pgm_read_byte(&breathing_table[index]) * 0x0101U))); +} + +#endif // BACKLIGHT_BREATHING +#endif // BACKLIGHT_ENABLE |