Initial commit, simple configuration with 2 layers.

Remember to tap the OUT_BLE key at least once; default output destination is USB.

.github/workflows/build.yml

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+on: [push, pull_request, workflow_dispatch]
+
+jobs:
+  build:
+    uses: zmkfirmware/zmk/.github/workflows/build-user-config.yml@main

build.yaml

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+# This file generates the GitHub Actions matrix
+# For simple board + shield combinations, add them
+# to the top level board and shield arrays, for more
+# control, add individual board + shield combinations to
+# the `include` property, e.g:
+#
+# board: [ "nice_nano_v2" ]
+# shield: [ "corne_left", "corne_right" ]
+# include:
+#   - board: bdn9_rev2
+#   - board: nice_nano_v2
+#     shield: reviung41
+#
+---
+include:
+  - board: nice_nano_v2
+    shield: bsag_nine_nano
+  - board: nice_nano_v2
+    shield: settings_reset
+

config/boards/shields/bsag_nine_nano/Kconfig.defconfig

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+# Copyright (c) 2022 The ZMK Contributors
+# SPDX-License-Identifier: MIT
+#
+# Remember: for BT keyboards, the length of ZMK_KEYBOARD_NAME has to be under 16 characters.
+
+if SHIELD_BSAG_NINE_NANO
+
+config ZMK_KEYBOARD_NAME
+    default "BSAG NineNano L"
+
+endif
+
+

config/boards/shields/bsag_nine_nano/Kconfig.shield

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+# Copyright (c) 2022 The ZMK Contributors
+# SPDX-License-Identifier: MIT
+
+config SHIELD_BSAG_NINE_NANO
+    def_bool $(shields_list_contains,bsag_nine_nano)
+
+

config/boards/shields/bsag_nine_nano/bsag_nine_nano.conf

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+CONFIG_BT_CTLR_TX_PWR_PLUS_8=y
+

config/boards/shields/bsag_nine_nano/bsag_nine_nano.dtsi

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+/*
+ * Copyright (c) 2020 The ZMK Contributors
+ *
+ * SPDX-License-Identifier: MIT
+ */
+
+#include <dt-bindings/zmk/matrix_transform.h>
+
+/ {
+
+	chosen {
+		zmk,kscan = &kscan0;
+		zmk,matrix_transform = &default_transform;
+	};
+
+	default_transform: keymap_transform_0 {
+		compatible = "zmk,matrix-transform";
+		columns = <9>;
+		rows = <1>;
+		map = <
+		         RC(0,0)  RC(0,1)  RC(0,2)
+		RC(0,3)  RC(0,4)  RC(0,5)  RC(0,6)
+		                                   RC(0,7)   RC(0,8)
+		>;
+	};
+
+	kscan0: kscan {
+		compatible = "zmk,kscan-gpio-direct";
+		label = "KSCAN";
+		input-gpios
+		= <&gpio0 2  (GPIO_ACTIVE_LOW | GPIO_PULL_UP)>
+		, <&gpio0 29 (GPIO_ACTIVE_LOW | GPIO_PULL_UP)>
+		, <&gpio0 31 (GPIO_ACTIVE_LOW | GPIO_PULL_UP)>
+		, <&gpio1 4  (GPIO_ACTIVE_LOW | GPIO_PULL_UP)>
+		, <&gpio0 11 (GPIO_ACTIVE_LOW | GPIO_PULL_UP)>
+		, <&gpio1 0  (GPIO_ACTIVE_LOW | GPIO_PULL_UP)>
+		, <&gpio0 24 (GPIO_ACTIVE_LOW | GPIO_PULL_UP)>
+		, <&gpio1 13 (GPIO_ACTIVE_LOW | GPIO_PULL_UP)>
+		, <&gpio1 11 (GPIO_ACTIVE_LOW | GPIO_PULL_UP)>
+		;
+	};
+
+};

config/boards/shields/bsag_nine_nano/bsag_nine_nano.keymap

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+/*
+ * Copyright (c) 2020 The ZMK Contributors
+ *
+ * SPDX-License-Identifier: MIT
+ */
+
+#include <behaviors.dtsi>
+#include <dt-bindings/zmk/keys.h>
+#include <dt-bindings/zmk/bt.h>
+#include <dt-bindings/zmk/outputs.h>
+
+
+//                  0       1       2
+//          3       4       5       6
+//                                  7       8
+
+
+/ { 
+    behaviors {
+        td: tapdance {
+            compatible = "zmk,behavior-hold-tap";
+            label = "TAPDANCE";
+            #binding-cells = <2>;
+            tapping-term-ms = <190>;
+            quick-tap-ms = <250>;
+            flavor = "tap-preferred";
+            bindings = <&kp>, <&kp>;
+        };
+    };
+
+    keymap {
+        compatible = "zmk,keymap";
+
+        base {
+            label = "Base";
+            bindings = <
+                    &kp W  &kp E  &kp R
+             &kp A  &kp S  &kp D  &kp F
+                                     &kp SPACE  &tog 1
+            >;
+        };
+
+        system {
+            label = "System";
+            bindings = <
+                        &kp TAB   &kp UP    &kp RET
+             &bt BT_CLR &kp LEFT  &kp DOWN  &kp RIGHT
+                                     &out OUT_BLE  &trans
+
+            >;
+        };
+    };
+};

config/boards/shields/bsag_nine_nano/bsag_nine_nano.overlay

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+/*
+ * Copyright (c) 2022 The ZMK Contributors
+ *
+ * SPDX-License-Identifier: MIT
+ */
+
+#include "bsag_nine_nano.dtsi"
+

config/boards/shields/bsag_nine_nano/bsag_nine_nano.zmk.yml

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+file_format: "1"
+id: bsag_nine_nano
+name: bsag_nine_nano
+type: shield
+url: https://github.com/bsag/
+requires: [pro_micro]
+features:
+  - keys

config/west.yml

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+manifest:
+  remotes:
+    - name: zmkfirmware
+      url-base: https://github.com/zmkfirmware
+  projects:
+    - name: zmk
+      remote: zmkfirmware
+      revision: main
+      import: app/west.yml
+  self:
+    path: config