[Keyboard] Add Synth Labs Solo keyboard (#16103)

Co-authored-by: Drashna Jaelre <drashna@live.com>
Co-authored-by: Ryan <fauxpark@gmail.com>

keyboards/synthlabs/solo/keymaps/default/keymap.c

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+// Copyright 2022 Aaron Hong (@hongaaronc)
+// SPDX-License-Identifier: GPL-2.0-or-later
+
+#include QMK_KEYBOARD_H
+
+const uint16_t PROGMEM keymaps[][MATRIX_ROWS][MATRIX_COLS] = {
+    [0] = LAYOUT_all(
+                                       KC_J,    KC_U,    KC_K,    KC_I,    KC_L,    KC_O, KC_SCLN,
+        _______, KC_MUTE, _______,
+                                       KC_J,    KC_U,    KC_K,    KC_I,    KC_L,    KC_O, KC_SCLN
+    )
+};

keyboards/synthlabs/solo/keymaps/default/readme.md

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+# Default Synth Labs Solo Layout
+
+This keymap is intended for usage as a macropad.

keyboards/synthlabs/solo/keymaps/gamepad/keymap.c

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+// Copyright 2022 Aaron Hong (@hongaaronc)
+// SPDX-License-Identifier: GPL-2.0-or-later
+
+#include QMK_KEYBOARD_H
+
+#include "joystick.h"
+
+const uint16_t PROGMEM keymaps[][MATRIX_ROWS][MATRIX_COLS] = {
+    [0] = LAYOUT_all(
+                                    JS_BUTTON0,JS_BUTTON1,JS_BUTTON2,JS_BUTTON3,JS_BUTTON4,JS_BUTTON5,JS_BUTTON6,
+          KC_NO,   JS_BUTTON7,  KC_NO,
+                                    JS_BUTTON0,JS_BUTTON1,JS_BUTTON2,JS_BUTTON3,JS_BUTTON4,JS_BUTTON5,JS_BUTTON6
+    )
+};
+
+#if defined(JOYSTICK_ENABLE) && defined(ENCODER_ENABLE)
+
+int16_t joystick_position = 0;
+int16_t pulses_per_revolution = 24;     // Depends on encoder model. Usually 18ppr or 24ppr for Bourns EC11s.
+int16_t full_joystick_value = 32767;    // Equivalent to max value of int16. +full_joystick_value is +1.0 axis output. -full_joystick_value is -1.0 axis output.
+joystick_config_t joystick_axes[JOYSTICK_AXES_COUNT] = {
+    [0] = JOYSTICK_AXIS_VIRTUAL
+};
+
+bool encoder_update_kb(uint8_t index, bool clockwise) {
+    joystick_position += (clockwise ? 2 : -2) * (full_joystick_value / pulses_per_revolution);  // +2 and -2 are used, since +1.0 and -1.0 axis output refers to positions at half of a full rotation
+
+    if (joystick_position != joystick_status.axes[0]) {
+        joystick_status.axes[0] = joystick_position;
+        joystick_status.status |= JS_UPDATED;
+    }
+    return true;
+}
+
+#endif

keyboards/synthlabs/solo/keymaps/gamepad/readme.md

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+# Gamepad Synth Labs Solo Layout
+
+This keymap is intended for usage as a IIDX controller. The rotary encoder is mapped as a virtual 1-axis joystick.

keyboards/synthlabs/solo/keymaps/gamepad/rules.mk

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+JOYSTICK_ENABLE = yes
+DEBOUNCE_TYPE = sym_eager_pk

keyboards/synthlabs/solo/keymaps/via/keymap.c

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+// Copyright 2022 Aaron Hong (@hongaaronc)
+// SPDX-License-Identifier: GPL-2.0-or-later
+
+#include QMK_KEYBOARD_H
+
+const uint16_t PROGMEM keymaps[][MATRIX_ROWS][MATRIX_COLS] = {
+    [0] = LAYOUT_all(
+                                       KC_J,    KC_U,    KC_K,    KC_I,    KC_L,    KC_O, KC_SCLN,
+        KC_VOLD, KC_MUTE, KC_VOLU,
+                                       KC_J,    KC_U,    KC_K,    KC_I,    KC_L,    KC_O, KC_SCLN
+    ),
+    [1] = LAYOUT_all(
+                                    _______, _______, _______, _______, _______, _______, _______,
+        _______, _______, _______,
+                                    _______, _______, _______, _______, _______, _______, _______
+    ),
+    [2] = LAYOUT_all(
+                                    _______, _______, _______, _______, _______, _______, _______,
+        _______, _______, _______,
+                                    _______, _______, _______, _______, _______, _______, _______
+    ),
+    [3] = LAYOUT_all(
+                                    _______, _______, _______, _______, _______, _______, _______,
+        _______, _______, _______,
+                                    _______, _______, _______, _______, _______, _______, _______
+    )
+};
+
+#if defined(VIA_ENABLE) && defined(ENCODER_ENABLE)
+
+#ifdef ENCODERS
+static uint8_t encoder_state[] = {0};
+static keypos_t encoder_cw[] = ENCODERS_CW_KEY;
+static keypos_t encoder_ccw[] = ENCODERS_CCW_KEY;
+#endif
+
+void encoder_action_unregister(void) {
+#ifdef ENCODERS
+    for (int index = 0; index < ENCODERS; ++index) {
+        if (encoder_state[index]) {
+            keyevent_t encoder_event = (keyevent_t) {
+                .key = encoder_state[index] >> 1 ? encoder_cw[index] : encoder_ccw[index],
+                .pressed = false,
+                .time = (timer_read() | 1)
+            };
+            encoder_state[index] = 0;
+            action_exec(encoder_event);
+        }
+    }
+#endif
+}
+
+void encoder_action_register(uint8_t index, bool clockwise) {
+#ifdef ENCODERS
+    keyevent_t encoder_event = (keyevent_t) {
+        .key = clockwise ? encoder_cw[index] : encoder_ccw[index],
+        .pressed = true,
+        .time = (timer_read() | 1)
+    };
+    encoder_state[index] = (clockwise ^ 1) | (clockwise << 1);
+    action_exec(encoder_event);
+#endif
+}
+
+void matrix_scan_user(void) {
+    encoder_action_unregister();
+}
+
+bool encoder_update_user(uint8_t index, bool clockwise) {
+    encoder_action_register(index, clockwise);
+    return false;
+}
+
+#endif

keyboards/synthlabs/solo/keymaps/via/rules.mk

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+VIA_ENABLE = yes