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-rw-r--r--app/src/behaviors/behavior_rgb_underglow.c62
-rw-r--r--app/src/rgb_underglow.c319
2 files changed, 381 insertions, 0 deletions
diff --git a/app/src/behaviors/behavior_rgb_underglow.c b/app/src/behaviors/behavior_rgb_underglow.c
new file mode 100644
index 0000000..7a48e07
--- /dev/null
+++ b/app/src/behaviors/behavior_rgb_underglow.c
@@ -0,0 +1,62 @@
+/*
+ * Copyright (c) 2020 Nick Winans <nick@winans.codes>
+ *
+ * SPDX-License-Identifier: MIT
+ */
+
+#define DT_DRV_COMPAT zmk_behavior_rgb_underglow
+
+#include <device.h>
+#include <drivers/behavior.h>
+#include <logging/log.h>
+
+#include <dt-bindings/zmk/rgb.h>
+#include <zmk/rgb_underglow.h>
+
+LOG_MODULE_DECLARE(zmk, CONFIG_ZMK_LOG_LEVEL);
+
+static int behavior_rgb_underglow_init(struct device *dev)
+{
+ return 0;
+}
+
+static int on_keymap_binding_pressed(struct device *dev, u32_t position, u32_t action, u32_t _)
+{
+ switch (action)
+ {
+ case RGB_TOG:
+ return zmk_rgb_underglow_toggle();
+ case RGB_HUI:
+ return zmk_rgb_underglow_change_hue(1);
+ case RGB_HUD:
+ return zmk_rgb_underglow_change_hue(-1);
+ case RGB_SAI:
+ return zmk_rgb_underglow_change_sat(1);
+ case RGB_SAD:
+ return zmk_rgb_underglow_change_sat(-1);
+ case RGB_BRI:
+ return zmk_rgb_underglow_change_brt(1);
+ case RGB_BRD:
+ return zmk_rgb_underglow_change_brt(-1);
+ case RGB_SPI:
+ return zmk_rgb_underglow_change_spd(1);
+ case RGB_SPD:
+ return zmk_rgb_underglow_change_spd(-1);
+ case RGB_EFF:
+ return zmk_rgb_underglow_cycle_effect(1);
+ case RGB_EFR:
+ return zmk_rgb_underglow_cycle_effect(-1);
+ }
+
+ return -ENOTSUP;
+}
+
+static const struct behavior_driver_api behavior_rgb_underglow_driver_api = {
+ .binding_pressed = on_keymap_binding_pressed,
+};
+
+DEVICE_AND_API_INIT(behavior_rgb_underglow, DT_INST_LABEL(0), behavior_rgb_underglow_init,
+ NULL,
+ NULL,
+ APPLICATION, CONFIG_KERNEL_INIT_PRIORITY_DEFAULT,
+ &behavior_rgb_underglow_driver_api); \ No newline at end of file
diff --git a/app/src/rgb_underglow.c b/app/src/rgb_underglow.c
new file mode 100644
index 0000000..95adcec
--- /dev/null
+++ b/app/src/rgb_underglow.c
@@ -0,0 +1,319 @@
+/*
+ * Copyright (c) 2020 Nick Winans <nick@winans.codes>
+ *
+ * SPDX-License-Identifier: MIT
+ */
+
+#include <device.h>
+#include <init.h>
+#include <kernel.h>
+
+#include <math.h>
+#include <stdlib.h>
+
+#include <logging/log.h>
+
+#include <drivers/led_strip.h>
+#include <device.h>
+
+LOG_MODULE_DECLARE(zmk, CONFIG_ZMK_LOG_LEVEL);
+
+#define STRIP_LABEL DT_LABEL(DT_CHOSEN(zmk_underglow))
+#define STRIP_NUM_PIXELS DT_PROP(DT_CHOSEN(zmk_underglow), chain_length)
+
+enum rgb_underglow_effect {
+ UNDERGLOW_EFFECT_SOLID,
+ UNDERGLOW_EFFECT_BREATHE,
+ UNDERGLOW_EFFECT_SPECTRUM,
+ UNDERGLOW_EFFECT_SWIRL,
+ UNDERGLOW_EFFECT_NUMBER // Used to track number of underglow effects
+};
+
+struct led_hsb {
+ u16_t h;
+ u8_t s;
+ u8_t b;
+};
+
+struct rgb_underglow_state {
+ u16_t hue;
+ u8_t saturation;
+ u8_t brightness;
+ u8_t animation_speed;
+ u8_t current_effect;
+ u16_t animation_step;
+ bool on;
+};
+
+struct rgb_underglow_state state;
+
+struct device *led_strip;
+
+struct led_rgb pixels[STRIP_NUM_PIXELS];
+
+static struct led_rgb hsb_to_rgb(struct led_hsb hsb)
+{
+ double r, g, b;
+
+ u8_t i = hsb.h / 60;
+ double v = hsb.b / 100.0;
+ double s = hsb.s / 100.0;
+ double f = hsb.h / 360.0 * 6 - i;
+ double p = v * (1 - s);
+ double q = v * (1 - f * s);
+ double t = v * (1 - (1 - f) * s);
+
+ switch (i % 6)
+ {
+ case 0: r = v; g = t; b = p; break;
+ case 1: r = q; g = v; b = p; break;
+ case 2: r = p; g = v; b = t; break;
+ case 3: r = p; g = q; b = v; break;
+ case 4: r = t; g = p; b = v; break;
+ case 5: r = v; g = p; b = q; break;
+ }
+
+ struct led_rgb rgb = { r: r*255, g: g*255, b: b*255 };
+
+ return rgb;
+}
+
+static void zmk_rgb_underglow_effect_solid()
+{
+ for (int i=0; i<STRIP_NUM_PIXELS; i++)
+ {
+ int hue = state.hue;
+ int sat = state.saturation;
+ int brt = state.brightness;
+
+ struct led_hsb hsb = { hue, sat, brt };
+
+ pixels[i] = hsb_to_rgb(hsb);
+ }
+}
+
+static void zmk_rgb_underglow_effect_breathe()
+{
+ for (int i=0; i<STRIP_NUM_PIXELS; i++)
+ {
+ int hue = state.hue;
+ int sat = state.saturation;
+ int brt = abs(state.animation_step - 1200) / 12;
+
+ struct led_hsb hsb = { hue, sat, brt };
+
+ pixels[i] = hsb_to_rgb(hsb);
+ }
+
+ state.animation_step += state.animation_speed * 10;
+
+ if (state.animation_step > 2400) {
+ state.animation_step = 0;
+ }
+}
+
+static void zmk_rgb_underglow_effect_spectrum()
+{
+ for (int i=0; i<STRIP_NUM_PIXELS; i++)
+ {
+ int hue = state.animation_step;
+ int sat = state.saturation;
+ int brt = state.brightness;
+
+ struct led_hsb hsb = { hue, sat, brt };
+
+ pixels[i] = hsb_to_rgb(hsb);
+ }
+
+ state.animation_step += state.animation_speed;
+ state.animation_step = state.animation_step % 360;
+}
+
+static void zmk_rgb_underglow_effect_swirl()
+{
+ for (int i=0; i<STRIP_NUM_PIXELS; i++)
+ {
+ int hue = (360 / STRIP_NUM_PIXELS * i + state.animation_step) % 360;
+ int sat = state.saturation;
+ int brt = state.brightness;
+
+ struct led_hsb hsb = { hue, sat, brt };
+
+ pixels[i] = hsb_to_rgb(hsb);
+ }
+
+ state.animation_step += state.animation_speed * 2;
+ state.animation_step = state.animation_step % 360;
+}
+
+static void zmk_rgb_underglow_tick(struct k_work *work)
+{
+ switch (state.current_effect)
+ {
+ case UNDERGLOW_EFFECT_SOLID:
+ zmk_rgb_underglow_effect_solid();
+ break;
+ case UNDERGLOW_EFFECT_BREATHE:
+ zmk_rgb_underglow_effect_breathe();
+ break;
+ case UNDERGLOW_EFFECT_SPECTRUM:
+ zmk_rgb_underglow_effect_spectrum();
+ break;
+ case UNDERGLOW_EFFECT_SWIRL:
+ zmk_rgb_underglow_effect_swirl();
+ break;
+ }
+
+ led_strip_update_rgb(led_strip, pixels, STRIP_NUM_PIXELS);
+}
+
+K_WORK_DEFINE(underglow_work, zmk_rgb_underglow_tick);
+
+static void zmk_rgb_underglow_tick_handler(struct k_timer *timer)
+{
+ k_work_submit(&underglow_work);
+}
+
+K_TIMER_DEFINE(underglow_tick, zmk_rgb_underglow_tick_handler, NULL);
+
+static int zmk_rgb_underglow_init(struct device *_arg)
+{
+ led_strip = device_get_binding(STRIP_LABEL);
+ if (led_strip) {
+ LOG_INF("Found LED strip device %s", STRIP_LABEL);
+ } else {
+ LOG_ERR("LED strip device %s not found", STRIP_LABEL);
+ return -EINVAL;
+ }
+
+ state = (struct rgb_underglow_state){
+ hue: 0,
+ saturation: 100,
+ brightness: 100,
+ animation_speed: 3,
+ current_effect: 0,
+ animation_step: 0,
+ on: true
+ };
+
+ k_timer_start(&underglow_tick, K_NO_WAIT, K_MSEC(50));
+
+ return 0;
+}
+
+int zmk_rgb_underglow_cycle_effect(int direction)
+{
+ if (!led_strip) return -ENODEV;
+
+ if (state.current_effect == 0 && direction < 0) {
+ state.current_effect = UNDERGLOW_EFFECT_NUMBER - 1;
+ return 0;
+ }
+
+ state.current_effect += direction;
+
+ if (state.current_effect >= UNDERGLOW_EFFECT_NUMBER) {
+ state.current_effect = 0;
+ }
+
+ state.animation_step = 0;
+
+ return 0;
+}
+
+int zmk_rgb_underglow_toggle()
+{
+ if (!led_strip) return -ENODEV;
+
+ state.on = !state.on;
+
+ if (state.on) {
+ state.animation_step = 0;
+ k_timer_start(&underglow_tick, K_NO_WAIT, K_MSEC(50));
+ } else {
+
+ for (int i=0; i<STRIP_NUM_PIXELS; i++)
+ {
+ pixels[i] = (struct led_rgb){ r: 0, g: 0, b: 0};
+ }
+
+ led_strip_update_rgb(led_strip, pixels, STRIP_NUM_PIXELS);
+
+ k_timer_stop(&underglow_tick);
+ }
+
+ return 0;
+}
+
+int zmk_rgb_underglow_change_hue(int direction)
+{
+ if (!led_strip) return -ENODEV;
+
+ if (state.hue == 0 && direction < 0) {
+ state.hue = 350;
+ return 0;
+ }
+
+ state.hue += direction * CONFIG_ZMK_RGB_UNDERGLOW_HUE_STEP;
+
+ if (state.hue > 350) {
+ state.hue = 0;
+ }
+
+ return 0;
+}
+
+int zmk_rgb_underglow_change_sat(int direction)
+{
+ if (!led_strip) return -ENODEV;
+
+ if (state.saturation == 0 && direction < 0) {
+ return 0;
+ }
+
+ state.saturation += direction * CONFIG_ZMK_RGB_UNDERGLOW_SAT_STEP;
+
+ if (state.saturation > 100) {
+ state.saturation = 100;
+ }
+
+ return 0;
+}
+
+int zmk_rgb_underglow_change_brt(int direction)
+{
+ if (!led_strip) return -ENODEV;
+
+ if (state.brightness == 0 && direction < 0) {
+ return 0;
+ }
+
+ state.brightness += direction * CONFIG_ZMK_RGB_UNDERGLOW_BRT_STEP;
+
+ if (state.brightness > 100) {
+ state.brightness = 100;
+ }
+
+ return 0;
+}
+
+int zmk_rgb_underglow_change_spd(int direction)
+{
+ if (!led_strip) return -ENODEV;
+
+ if (state.animation_speed == 1 && direction < 0) {
+ return 0;
+ }
+
+ state.animation_speed += direction;
+
+ if (state.animation_speed > 5) {
+ state.animation_speed = 5;
+ }
+
+ return 0;
+}
+
+SYS_INIT(zmk_rgb_underglow_init,
+ APPLICATION,
+ CONFIG_APPLICATION_INIT_PRIORITY);
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