Merge pull request #109 from Nicell/underglow/state-persistence

Add RGB underglow state Kconfig and settings

app/CMakeLists.txt

@@ -62,6 +62,7 @@ target_sources_ifdef(CONFIG_ZMK_BLE app PRIVATE src/hog.c)
 target_sources_ifdef(CONFIG_ZMK_RGB_UNDERGLOW app PRIVATE src/rgb_underglow.c)
 target_sources(app PRIVATE src/endpoints.c)
 target_sources(app PRIVATE src/hid_listener.c)
+target_sources_ifdef(CONFIG_SETTINGS app PRIVATE src/settings.c)
 target_sources(app PRIVATE src/main.c)
 
 zephyr_cc_option(-Wfatal-errors)

app/Kconfig

@@ -217,6 +217,10 @@ menuconfig ZMK_RGB_UNDERGLOW
 
 if ZMK_RGB_UNDERGLOW
 
+# This default value cuts down on tons of excess .conf files, if you're using GPIO, manually disable this
+config SPI
+	default y
+
 config ZMK_RGB_UNDERGLOW_HUE_STEP
 	int "RGB underglow hue step in degrees of 360"
 	default 10
@@ -229,6 +233,30 @@ config ZMK_RGB_UNDERGLOW_BRT_STEP
 	int "RGB underglow brightness step in percent"
 	default 10
 
+config ZMK_RGB_UNDERGLOW_HUE_START
+	int "RGB underglow start hue value from 0-359"
+	default 0
+
+config ZMK_RGB_UNDERGLOW_SAT_START
+	int "RGB underglow start saturations value from 0-100"
+	default 100
+
+config ZMK_RGB_UNDERGLOW_BRT_START
+	int "RGB underglow start brightness value from 0-100"
+	default 100
+
+config ZMK_RGB_UNDERGLOW_SPD_START
+	int "RGB underglow start animation speed value from 1-5"
+	default 3
+
+config ZMK_RGB_UNDERGLOW_EFF_START
+	int "RGB underglow start effect int value related to the effect enum list"
+	default 0
+
+config ZMK_RGB_UNDERGLOW_ON_START
+	bool "Whether RGB underglow starts on by default"
+	default y
+
 endif
 
 endmenu

app/src/rgb_underglow.c

@@ -7,6 +7,7 @@
 #include <device.h>
 #include <init.h>
 #include <kernel.h>
+#include <settings/settings.h>
 
 #include <math.h>
 #include <stdlib.h>
@@ -14,7 +15,6 @@
 #include <logging/log.h>
 
 #include <drivers/led_strip.h>
-#include <device.h>
 
 LOG_MODULE_DECLARE(zmk, CONFIG_ZMK_LOG_LEVEL);
 
@@ -45,12 +45,36 @@ struct rgb_underglow_state {
     bool on;
 };
 
-struct rgb_underglow_state state;
-
 struct device *led_strip;
 
 struct led_rgb pixels[STRIP_NUM_PIXELS];
 
+struct rgb_underglow_state state;
+
+#if IS_ENABLED(CONFIG_SETTINGS)
+static int rgb_settings_set(const char *name, size_t len, settings_read_cb read_cb, void *cb_arg) {
+    const char *next;
+    int rc;
+
+    if (settings_name_steq(name, "state", &next) && !next) {
+        if (len != sizeof(state)) {
+            return -EINVAL;
+        }
+
+        rc = read_cb(cb_arg, &state, sizeof(state));
+        if (rc >= 0) {
+            return 0;
+        }
+
+        return rc;
+    }
+
+    return -ENOENT;
+}
+
+struct settings_handler rgb_conf = {.name = "rgb/underglow", .h_set = rgb_settings_set};
+#endif
+
 static struct led_rgb hsb_to_rgb(struct led_hsb hsb) {
     double r, g, b;
 
@@ -100,6 +124,14 @@ static struct led_rgb hsb_to_rgb(struct led_hsb hsb) {
     return rgb;
 }
 
+static void zmk_rgb_underglow_off() {
+    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);
+}
+
 static void zmk_rgb_underglow_effect_solid() {
     for (int i = 0; i < STRIP_NUM_PIXELS; i++) {
         int hue = state.hue;
@@ -182,6 +214,14 @@ static void zmk_rgb_underglow_tick(struct k_work *work) {
 K_WORK_DEFINE(underglow_work, zmk_rgb_underglow_tick);
 
 static void zmk_rgb_underglow_tick_handler(struct k_timer *timer) {
+    if (!state.on) {
+        zmk_rgb_underglow_off();
+
+        k_timer_stop(timer);
+
+        return;
+    }
+
     k_work_submit(&underglow_work);
 }
 
@@ -197,20 +237,32 @@ static int zmk_rgb_underglow_init(struct device *_arg) {
     }
 
     state = (struct rgb_underglow_state){
-        hue : 0,
-        saturation : 100,
-        brightness : 100,
-        animation_speed : 3,
-        current_effect : 0,
+        hue : CONFIG_ZMK_RGB_UNDERGLOW_HUE_START,
+        saturation : CONFIG_ZMK_RGB_UNDERGLOW_SAT_START,
+        brightness : CONFIG_ZMK_RGB_UNDERGLOW_BRT_START,
+        animation_speed : CONFIG_ZMK_RGB_UNDERGLOW_SPD_START,
+        current_effect : CONFIG_ZMK_RGB_UNDERGLOW_EFF_START,
         animation_step : 0,
-        on : true
+        on : IS_ENABLED(CONFIG_ZMK_RGB_UNDERGLOW_ON_START)
     };
 
+#if IS_ENABLED(CONFIG_SETTINGS)
+    settings_register(&rgb_conf);
+#endif
+
     k_timer_start(&underglow_tick, K_NO_WAIT, K_MSEC(50));
 
     return 0;
 }
 
+int zmk_rgb_underglow_save_state() {
+#if IS_ENABLED(CONFIG_SETTINGS)
+    return settings_save_one("rgb/underglow/state", &state, sizeof(state));
+#else
+    return 0;
+#endif
+}
+
 int zmk_rgb_underglow_cycle_effect(int direction) {
     if (!led_strip)
         return -ENODEV;
@@ -228,7 +280,7 @@ int zmk_rgb_underglow_cycle_effect(int direction) {
 
     state.animation_step = 0;
 
-    return 0;
+    return zmk_rgb_underglow_save_state();
 }
 
 int zmk_rgb_underglow_toggle() {
@@ -241,17 +293,12 @@ int zmk_rgb_underglow_toggle() {
         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);
+        zmk_rgb_underglow_off();
 
         k_timer_stop(&underglow_tick);
     }
 
-    return 0;
+    return zmk_rgb_underglow_save_state();
 }
 
 int zmk_rgb_underglow_change_hue(int direction) {
@@ -259,17 +306,15 @@ int zmk_rgb_underglow_change_hue(int direction) {
         return -ENODEV;
 
     if (state.hue == 0 && direction < 0) {
-        state.hue = 350;
+        state.hue = 360 - CONFIG_ZMK_RGB_UNDERGLOW_HUE_STEP;
         return 0;
     }
 
     state.hue += direction * CONFIG_ZMK_RGB_UNDERGLOW_HUE_STEP;
 
-    if (state.hue > 350) {
-        state.hue = 0;
-    }
+    state.hue = state.hue % 360;
 
-    return 0;
+    return zmk_rgb_underglow_save_state();
 }
 
 int zmk_rgb_underglow_change_sat(int direction) {
@@ -286,7 +331,7 @@ int zmk_rgb_underglow_change_sat(int direction) {
         state.saturation = 100;
     }
 
-    return 0;
+    return zmk_rgb_underglow_save_state();
 }
 
 int zmk_rgb_underglow_change_brt(int direction) {
@@ -303,7 +348,7 @@ int zmk_rgb_underglow_change_brt(int direction) {
         state.brightness = 100;
     }
 
-    return 0;
+    return zmk_rgb_underglow_save_state();
 }
 
 int zmk_rgb_underglow_change_spd(int direction) {
@@ -320,7 +365,7 @@ int zmk_rgb_underglow_change_spd(int direction) {
         state.animation_speed = 5;
     }
 
-    return 0;
+    return zmk_rgb_underglow_save_state();
 }
 
 SYS_INIT(zmk_rgb_underglow_init, APPLICATION, CONFIG_APPLICATION_INIT_PRIORITY);

app/src/settings.c

@@ -0,0 +1,8 @@
+#include <device.h>
+#include <init.h>
+#include <kernel.h>
+#include <settings/settings.h>
+
+static int zmk_settings_init(struct device *_arg) { return settings_load(); }
+
+SYS_INIT(zmk_settings_init, APPLICATION, CONFIG_APPLICATION_INIT_PRIORITY);

docs/docs/feature/underglow.md

@@ -35,11 +35,17 @@ If your board or shield does not have RGB underglow configured, refer to [Adding
 
 There are various Kconfig options used to configure the RGB underglow feature. These can all be set in the `.conf` file.
 
-| Option                       | Description                                    | Default |
-| ---------------------------- | ---------------------------------------------- | ------- |
-| `ZMK_RGB_UNDERGLOW_HUE_STEP` | Hue step in degrees of 360 used by RGB actions | `10`    |
-| `ZMK_RGB_UNDERGLOW_SAT_STEP` | Saturation step in percent used by RGB actions | `10`    |
-| `ZMK_RGB_UNDERGLOW_BRT_STEP` | Brightness step in percent used by RGB actions | `10`    |
+| Option                        | Description                                    | Default |
+|-------------------------------|------------------------------------------------|---------|
+| `ZMK_RGB_UNDERGLOW_HUE_STEP`  | Hue step in degrees of 360 used by RGB actions | 10      |
+| `ZMK_RGB_UNDERGLOW_SAT_STEP`  | Saturation step in percent used by RGB actions | 10      |
+| `ZMK_RGB_UNDERGLOW_BRT_STEP`  | Brightness step in percent used by RGB actions | 10      |
+| `ZMK_RGB_UNDERGLOW_HUE_START` | Default hue 0-359 in degrees                   | 0       |
+| `ZMK_RGB_UNDERGLOW_SAT_START` | Default saturation 0-100 in percent            | 100     |
+| `ZMK_RGB_UNDERGLOW_BRT_START` | Default brightness 0-100 in percent            | 100     |
+| `ZMK_RGB_UNDERGLOW_SPD_START` | Default effect speed 1-5                       | 3       |
+| `ZMK_RGB_UNDERGLOW_EFF_START` | Default effect integer from the effect enum    | 0       |
+| `ZMK_RGB_UNDERGLOW_ON_START`  | Default on state                               | y       |
 
 ## Adding RGB Underglow to a Board