feat: only send HID reports to one endpoint

app/CMakeLists.txt

@@ -37,11 +37,13 @@ target_sources(app PRIVATE src/events/keycode_state_changed.c)
 target_sources(app PRIVATE src/events/modifiers_state_changed.c)
 target_sources(app PRIVATE src/events/sensor_event.c)
 target_sources_ifdef(CONFIG_ZMK_BLE app PRIVATE src/events/ble_active_profile_changed.c)
+target_sources_ifdef(CONFIG_USB app PRIVATE src/events/usb_conn_state_changed.c)
 if (NOT CONFIG_ZMK_SPLIT_BLE_ROLE_PERIPHERAL)
   target_sources(app PRIVATE src/behaviors/behavior_key_press.c)
   target_sources(app PRIVATE src/behaviors/behavior_reset.c)
   target_sources(app PRIVATE src/behaviors/behavior_hold_tap.c)
   target_sources(app PRIVATE src/behaviors/behavior_momentary_layer.c)
+  target_sources(app PRIVATE src/behaviors/behavior_outputs.c)
   target_sources(app PRIVATE src/behaviors/behavior_toggle_layer.c)
   target_sources(app PRIVATE src/behaviors/behavior_transparent.c)
   target_sources(app PRIVATE src/behaviors/behavior_none.c)

app/dts/behaviors.dtsi

@@ -10,3 +10,4 @@
 #include <behaviors/rgb_underglow.dtsi>
 #include <behaviors/bluetooth.dtsi>
 #include <behaviors/ext_power.dtsi>
+#include <behaviors/outputs.dtsi>

app/dts/behaviors/outputs.dtsi

@@ -0,0 +1,9 @@
+/ {
+    behaviors {
+        out: behavior_outputs {
+            compatible = "zmk,behavior-outputs";
+            label = "OUTPUTS";
+            #binding-cells = <1>;
+        };
+    };
+};

app/dts/bindings/behaviors/zmk,behavior-outputs.yaml

@@ -0,0 +1,10 @@
+#
+# Copyright (c) 2020, The ZMK Contributors
+# SPDX-License-Identifier: MIT
+#
+
+description: Output Selection Behavior
+
+compatible: "zmk,behavior-outputs"
+
+include: one_param.yaml

app/include/dt-bindings/zmk/outputs.h

@@ -0,0 +1,9 @@
+/*
+ * Copyright (c) 2020 The ZMK Contributors
+ *
+ * SPDX-License-Identifier: MIT
+ */
+
+#define OUT_TOG 0
+#define OUT_USB 1
+#define OUT_BLE 2

app/include/zmk/ble.h

@@ -15,6 +15,7 @@ int zmk_ble_prof_prev();
 int zmk_ble_prof_select(u8_t index);
 
 bt_addr_le_t *zmk_ble_active_profile_addr();
+bool zmk_ble_active_profile_is_connected();
 char *zmk_ble_active_profile_name();
 
 int zmk_ble_unpair_all();

app/include/zmk/endpoints.h

@@ -9,4 +9,12 @@
 #include <zmk/keys.h>
 #include <zmk/hid.h>
 
+enum zmk_endpoint {
+    ZMK_ENDPOINT_USB,
+    ZMK_ENDPOINT_BLE,
+};
+
+int zmk_endpoints_select(enum zmk_endpoint endpoint);
+int zmk_endpoints_toggle();
+
 int zmk_endpoints_send_report(u8_t usage_report);

app/include/zmk/events/usb-conn-state-changed.h

@@ -0,0 +1,20 @@
+/*
+ * Copyright (c) 2020 The ZMK Contributors
+ *
+ * SPDX-License-Identifier: MIT
+ */
+
+#pragma once
+
+#include <zephyr.h>
+#include <usb/usb_device.h>
+
+#include <zmk/event-manager.h>
+#include <zmk/usb.h>
+
+struct usb_conn_state_changed {
+    struct zmk_event_header header;
+    enum zmk_usb_conn_state conn_state;
+};
+
+ZMK_EVENT_DECLARE(usb_conn_state_changed);

app/include/zmk/hid.h

@@ -165,9 +165,11 @@ int zmk_hid_register_mods(zmk_mod_flags modifiers);
 int zmk_hid_unregister_mods(zmk_mod_flags modifiers);
 int zmk_hid_keypad_press(zmk_key key);
 int zmk_hid_keypad_release(zmk_key key);
+void zmk_hid_keypad_clear();
 
 int zmk_hid_consumer_press(zmk_key key);
 int zmk_hid_consumer_release(zmk_key key);
+void zmk_hid_consumer_clear();
 
 struct zmk_hid_keypad_report *zmk_hid_get_keypad_report();
 struct zmk_hid_consumer_report *zmk_hid_get_consumer_report();

app/include/zmk/usb.h

@@ -12,8 +12,18 @@
 #include <zmk/keys.h>
 #include <zmk/hid.h>
 
+enum zmk_usb_conn_state {
+    ZMK_USB_CONN_NONE,
+    ZMK_USB_CONN_POWERED,
+    ZMK_USB_CONN_HID,
+};
+
 enum usb_dc_status_code zmk_usb_get_status();
+enum zmk_usb_conn_state zmk_usb_get_conn_state();
+
+static inline bool zmk_usb_is_powered() { return zmk_usb_get_conn_state() != ZMK_USB_CONN_NONE; }
+static inline bool zmk_usb_is_hid_ready() { return zmk_usb_get_conn_state() == ZMK_USB_CONN_HID; }
 
 #ifdef CONFIG_ZMK_USB
-int zmk_usb_hid_send_report(u8_t *report, size_t len);
+int zmk_usb_hid_send_report(const u8_t *report, size_t len);
 #endif /* CONFIG_ZMK_USB */

app/src/behaviors/behavior_outputs.c

@@ -0,0 +1,44 @@
+/*
+ * Copyright (c) 2020 The ZMK Contributors
+ *
+ * SPDX-License-Identifier: MIT
+ */
+
+#define DT_DRV_COMPAT zmk_behavior_outputs
+
+#include <device.h>
+#include <devicetree.h>
+#include <drivers/behavior.h>
+
+#include <dt-bindings/zmk/outputs.h>
+
+#include <zmk/behavior.h>
+#include <zmk/endpoints.h>
+
+#include <logging/log.h>
+LOG_MODULE_DECLARE(zmk, CONFIG_ZMK_LOG_LEVEL);
+
+static int on_keymap_binding_pressed(struct zmk_behavior_binding *binding,
+                                     struct zmk_behavior_binding_event event) {
+    switch (binding->param1) {
+    case OUT_TOG:
+        return zmk_endpoints_toggle();
+    case OUT_USB:
+        return zmk_endpoints_select(ZMK_ENDPOINT_USB);
+    case OUT_BLE:
+        return zmk_endpoints_select(ZMK_ENDPOINT_BLE);
+    default:
+        LOG_ERR("Unknown output command: %d", binding->param1);
+    }
+
+    return -ENOTSUP;
+}
+
+static int behavior_out_init(struct device *dev) { return 0; }
+
+static const struct behavior_driver_api behavior_outputs_driver_api = {
+    .binding_pressed = on_keymap_binding_pressed,
+};
+
+DEVICE_AND_API_INIT(behavior_out, DT_INST_LABEL(0), behavior_out_init, NULL, NULL, APPLICATION,
+                    CONFIG_KERNEL_INIT_PRIORITY_DEFAULT, &behavior_outputs_driver_api);

app/src/ble.c

@@ -94,6 +94,12 @@ static void raise_profile_changed_event() {
     ZMK_EVENT_RAISE(ev);
 }
 
+static void raise_profile_changed_event_callback(struct k_work *work) {
+    raise_profile_changed_event();
+}
+
+K_WORK_DEFINE(raise_profile_changed_event_work, raise_profile_changed_event_callback);
+
 static bool active_profile_is_open() {
     return !bt_addr_le_cmp(&profiles[active_profile].peer, BT_ADDR_LE_ANY);
 }
@@ -111,7 +117,7 @@ void set_profile_address(u8_t index, const bt_addr_le_t *addr) {
     raise_profile_changed_event();
 }
 
-bool active_profile_is_connected() {
+bool zmk_ble_active_profile_is_connected() {
     struct bt_conn *conn;
     bt_addr_le_t *addr = zmk_ble_active_profile_addr();
     if (!bt_addr_le_cmp(addr, BT_ADDR_LE_ANY)) {
@@ -163,9 +169,9 @@ int update_advertising() {
     struct bt_conn *conn;
     enum advertising_type desired_adv = ZMK_ADV_NONE;
 
-    if (active_profile_is_open() || !active_profile_is_connected()) {
+    if (active_profile_is_open()) {
         desired_adv = ZMK_ADV_CONN;
-    } else if (!active_profile_is_connected()) {
+    } else if (!zmk_ble_active_profile_is_connected()) {
         desired_adv = ZMK_ADV_CONN;
         // Need to fix directed advertising for privacy centrals. See
         // https://github.com/zephyrproject-rtos/zephyr/pull/14984 char
@@ -327,6 +333,10 @@ static int ble_profiles_handle_set(const char *name, size_t len, settings_read_c
 struct settings_handler profiles_handler = {.name = "ble", .h_set = ble_profiles_handle_set};
 #endif /* IS_ENABLED(CONFIG_SETTINGS) */
 
+static bool is_conn_active_profile(const struct bt_conn *conn) {
+    return bt_addr_le_cmp(bt_conn_get_dst(conn), &profiles[active_profile].peer) == 0;
+}
+
 static void connected(struct bt_conn *conn, u8_t err) {
     char addr[BT_ADDR_LE_STR_LEN];
     bt_addr_le_to_str(bt_conn_get_dst(conn), addr, sizeof(addr));
@@ -352,6 +362,11 @@ static void connected(struct bt_conn *conn, u8_t err) {
     }
 
     update_advertising();
+
+    if (is_conn_active_profile(conn)) {
+        LOG_DBG("Active profile connected");
+        raise_profile_changed_event();
+    }
 }
 
 static void disconnected(struct bt_conn *conn, u8_t reason) {
@@ -364,6 +379,11 @@ static void disconnected(struct bt_conn *conn, u8_t reason) {
     // We need to do this in a work callback, otherwise the advertising update will still see the
     // connection for a profile as active, and not start advertising yet.
     k_work_submit(&update_advertising_work);
+
+    if (is_conn_active_profile(conn)) {
+        LOG_DBG("Active profile disconnected");
+        k_work_submit(&raise_profile_changed_event_work);
+    }
 }
 
 static void security_changed(struct bt_conn *conn, bt_security_t level, enum bt_security_err err) {