uart_comm: Report FN state to Dynamic

xingrz · Jan 29, 2023 · f22bf7f · f22bf7f
1 parent d96b724
commit f22bf7f
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Showing 4 changed files with 66 additions and 0 deletions.
diff --git a/config/boards/arm/hw75_keyboard/app/uart_comm/report/CMakeLists.txt b/config/boards/arm/hw75_keyboard/app/uart_comm/report/CMakeLists.txt
@@ -4,3 +4,8 @@
 # report - ping
 
 zephyr_library_sources(report_ping.c)
+
+# report - fn-state
+
+zephyr_library_sources(report_fn_state.c)
+zephyr_library_include_directories(${CMAKE_SOURCE_DIR}/include)
diff --git a/config/boards/arm/hw75_keyboard/app/uart_comm/report/report_fn_state.c b/config/boards/arm/hw75_keyboard/app/uart_comm/report/report_fn_state.c
@@ -0,0 +1,52 @@
+/*
+ * Copyright (c) 2022-2023 XiNGRZ
+ * SPDX-License-Identifier: MIT
+ */
+
+#include <kernel.h>
+#include <device.h>
+
+#include <string.h>
+
+#include <zmk/keymap.h>
+#include <zmk/event_manager.h>
+#include <zmk/events/layer_state_changed.h>
+
+#include "report.h"
+
+#define KEYMAP_NODE DT_INST(0, zmk_keymap)
+#define LAYER_LABEL(node) COND_CODE_0(DT_NODE_HAS_PROP(node, label), (NULL), (DT_LABEL(node))),
+
+static const char *layer_names[] = { DT_FOREACH_CHILD(KEYMAP_NODE, LAYER_LABEL) };
+
+static bool fn_pressed = false;
+
+static void report_fn_state_changed(bool pressed)
+{
+	uart_comm_MessageK2D k2d = uart_comm_MessageK2D_init_zero;
+	k2d.action = uart_comm_Action_FN_STATE_CHANGED;
+	k2d.which_payload = uart_comm_MessageK2D_fn_state_tag;
+	k2d.payload.fn_state.pressed = pressed;
+
+	uart_comm_report(&k2d);
+}
+
+static int report_fn_state_event_listener(const zmk_event_t *eh)
+{
+	if (as_zmk_layer_state_changed(eh)) {
+		uint8_t index = zmk_keymap_highest_layer_active();
+		bool current = strncmp(layer_names[index], "FN", 2) == 0;
+		if (!fn_pressed && current) {
+			report_fn_state_changed(true);
+		} else if (fn_pressed && !current) {
+			report_fn_state_changed(false);
+		}
+		fn_pressed = current;
+		return 0;
+	}
+
+	return -ENOTSUP;
+}
+
+ZMK_LISTENER(report_fn_state, report_fn_state_event_listener);
+ZMK_SUBSCRIPTION(report_fn_state, zmk_layer_state_changed);
diff --git a/config/hw75_keyboard.keymap b/config/hw75_keyboard.keymap
@@ -14,6 +14,7 @@
 	keymap {
 		compatible = "zmk,keymap";
 		base {
+			label = "BASE";
 			bindings = <
 				&kp ESC             &kp F1    &kp F2  &kp F3  &kp F4  &kp F5    &kp F6  &kp F7  &kp F8    &kp F9    &kp F10   &kp F11   &kp F12   &kp PAUSE_BREAK
 				&kp GRAVE &kp N1    &kp N2    &kp N3  &kp N4  &kp N5  &kp N6    &kp N7  &kp N8  &kp N9    &kp N0    &kp MINUS &kp EQUAL &kp BSPC  &kp INSERT
@@ -26,6 +27,7 @@
 		};
 
 		fn {
+			label = "FN";
 			bindings = <
 				&trans                          &kp C_BRI_DEC   &kp C_BRI_INC   &none           &none           &none   &none   &kp C_PREV  &kp C_PP  &kp C_NEXT  &kp C_MUTE  &kp C_VOL_DN  &kp C_VOL_UP  &trans
 				&trans          &trans          &trans          &trans          &trans          &trans          &trans  &trans  &trans      &trans    &trans      &trans      &trans        &trans        &trans

diff --git a/config/proto/uart_comm.proto b/config/proto/uart_comm.proto
@@ -10,6 +10,7 @@ package uart.comm;
 enum Action {
 	NOP = 0;
 	PING = 1;
+	FN_STATE_CHANGED = 2;
 }
 
 message MessageK2D
@@ -18,9 +19,15 @@ message MessageK2D
 	oneof payload
 	{
 		Nop nop = 2;
+		FnState fn_state = 3;
 	}
 }
 
 message Nop
 {
 }
+
+message FnState
+{
+	required bool pressed = 1;
+}