[Keyboard] Add mexsistor/ludmila (#10506)

* Add files via upload

* Update keyboards/mexsistor/ludmila/config.h

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

* Update keyboards/mexsistor/ludmila/ludmila.h

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

* Update ludmila.h

* Update keymap.c

Disable unnecessary code

* Update rules.mk

* Update matrix.c

* Update keyboards/mexsistor/ludmila/rules.mk

Co-authored-by: Ryan <fauxpark@gmail.com>

* Update keymap.c

* Update keyboards/mexsistor/ludmila/readme.md

Co-authored-by: Ryan <fauxpark@gmail.com>

* Update keymap.c

* Update keymap.c

* Update ludmila.h

* Update keyboards/mexsistor/ludmila/readme.md

Co-authored-by: Ryan <fauxpark@gmail.com>

* Update keyboards/mexsistor/ludmila/rules.mk

Co-authored-by: Ryan <fauxpark@gmail.com>

* Update keyboards/mexsistor/ludmila/rules.mk

Co-authored-by: Ryan <fauxpark@gmail.com>

* Update keyboards/mexsistor/ludmila/rules.mk

Co-authored-by: Ryan <fauxpark@gmail.com>

* Update keyboards/mexsistor/ludmila/keymaps/default/keymap.c

Co-authored-by: Ryan <fauxpark@gmail.com>

* Update keyboards/mexsistor/ludmila/readme.md

Co-authored-by: Ryan <fauxpark@gmail.com>

* Add files via upload

* Add files via upload

* Delete config.h

* Delete

* Update readme.md

* Update readme.md

* Delete tapdance timing

* Delete matrix.c

* Create matrix.c

* Deleted ludmila, add ludmila_v1

* Update readme.md

* add ludmila

* delete ludmila_v1, create ludmila

* Create matrix.c

* Change in matrix.c code and sustitute yes/lite custom_matrix in rules.mk

* Update keymap.c

* Add description; Change on RGB PIN

* Revert "Add description; Change on RGB PIN"

This reverts commit cfbe534925.

* config.h and rules.mk update

* Update keyboards/mexsistor/ludmila/info.json

Co-authored-by: James Young <18669334+noroadsleft@users.noreply.github.com>

* Update keyboards/mexsistor/ludmila/info.json

Co-authored-by: James Young <18669334+noroadsleft@users.noreply.github.com>

* Update keyboards/mexsistor/ludmila/rules.mk

Co-authored-by: James Young <18669334+noroadsleft@users.noreply.github.com>

Co-authored-by: Drashna Jaelre <drashna@live.com>
Co-authored-by: Ryan <fauxpark@gmail.com>
Co-authored-by: U-MEXSISTOR\Macropads <Kevin M>
Co-authored-by: James Young <18669334+noroadsleft@users.noreply.github.com>

keyboards/mexsistor/ludmila/config.h

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+/*
+Copyright 2020 Kevin M.
+
+This program is free software: you can redistribute it and/or modify
+it under the terms of the GNU General Public License as published by
+the Free Software Foundation, either version 2 of the License, or
+(at your option) any later version.
+
+This program is distributed in the hope that it will be useful,
+but WITHOUT ANY WARRANTY; without even the implied warranty of
+MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+GNU General Public License for more details.
+
+You should have received a copy of the GNU General Public License
+along with this program.  If not, see <http://www.gnu.org/licenses/>.
+*/
+
+#pragma once
+
+#include "config_common.h"
+
+/* USB Device descriptor parameter */
+#define VENDOR_ID    0x69CC
+#define PRODUCT_ID   0x6BF6
+#define DEVICE_VER   0x0001
+#define MANUFACTURER Kevin M.
+#define PRODUCT      Ludmila Macropad
+#define DESCRIPTION  Ludmila 4 switch + encoder macropad
+
+/* key matrix size */
+#define MATRIX_ROWS 3
+#define MATRIX_COLS 2
+
+/*
+ * Keyboard Matrix Assignments
+ *
+ * Change this to how you wired your keyboard
+ * COLS: AVR pins used for columns, left to right
+ * ROWS: AVR pins used for rows, top to bottom
+ * DIODE_DIRECTION: COL2ROW = COL = Anode (+), ROW = Cathode (-, marked on diode)
+ *                  ROW2COL = ROW = Anode (+), COL = Cathode (-, marked on diode)
+ *
+ */
+#define MATRIX_ROW_PINS { F0, C7, F7 }
+#define MATRIX_COL_PINS { F4, F1 }
+#define UNUSED_PINS
+
+/* COL2ROW, ROW2COL */
+#define DIODE_DIRECTION COL2ROW
+
+#define RGB_DI_PIN D1
+#define RGBLED_NUM 4
+#define RGBLIGHT_SLEEP
+#define RGBLIGHT_ANIMATIONS
+
+// Encoder
+#define ENCODERS_PAD_A { F6 }
+#define ENCODERS_PAD_B { F5 }

keyboards/mexsistor/ludmila/info.json

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+{
+    "keyboard_name": "ludmila",
+    "url": "",
+    "maintainer": "Kevin M.",
+    "width": 4,
+    "height": 2,
+    "layouts": {
+        "LAYOUT": {
+            "layout": [
+                {"label": "SW1", "x": 0, "y": 0},
+                {"label": "SW3", "x": 1, "y": 0},
+                {"label": "Encoder", "x": 3, "y": 0},
+
+                {"label": "SW2", "x": 0, "y": 1},
+                {"label": "SW4", "x": 1, "y": 1}
+            ]
+        }
+    }
+}

keyboards/mexsistor/ludmila/keymaps/default/keymap.c

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+/* Copyright 2020 Kevin M.
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program.  If not, see <http://www.gnu.org/licenses/>.
+ */
+#include QMK_KEYBOARD_H
+
+// Defines names for use in layer keycodes and the keymap
+enum keyboard_layers{
+    _BASE = 0,
+    _CONTROL
+};
+
+const uint16_t PROGMEM keymaps[][MATRIX_ROWS][MATRIX_COLS] = {
+  [_BASE] = LAYOUT( /* Base */
+    KC_COPY, KC_PSCREEN, KC_MUTE,
+    KC_PASTE, KC_ENTER
+
+  ),
+
+};
+
+void encoder_update_user(uint8_t index, bool clockwise) {
+    if (index == 0) {
+        if (clockwise) {
+            tap_code(KC_VOLU);
+        } else {
+            tap_code(KC_VOLD);
+        }
+    }
+}

keyboards/mexsistor/ludmila/keymaps/default/readme.md

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+# The default keymap for ludmila

keyboards/mexsistor/ludmila/ludmila.c

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+/* Copyright 2020 Kevin M.
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program.  If not, see <http://www.gnu.org/licenses/>.
+ */
+
+#include "ludmila.h"

keyboards/mexsistor/ludmila/ludmila.h

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+/* Copyright 2020 Kevin M.
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program.  If not, see <http://www.gnu.org/licenses/>.
+ */
+
+#pragma once
+
+#include "quantum.h"
+
+/* This is a shortcut to help you visually see your layout.
+ *
+ * The first section contains all of the arguments representing the physical
+ * layout of the board and position of the keys.
+ *
+ * The second converts the arguments into a two-dimensional array which
+ * represents the switch matrix.
+ */
+#define LAYOUT( \
+    k00, k01, k20, \
+    k10, k11 \
+) { \
+    { k00, k01, }, \
+    { k10, k11, }, \
+    { k20 }  \
+  }

keyboards/mexsistor/ludmila/matrix.c

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+/*
+Copyright 2012-2018 Jun Wako, Jack Humbert, Yiancar
+
+This program is free software: you can redistribute it and/or modify
+it under the terms of the GNU General Public License as published by
+the Free Software Foundation, either version 2 of the License, or
+(at your option) any later version.
+
+This program is distributed in the hope that it will be useful,
+but WITHOUT ANY WARRANTY; without even the implied warranty of
+MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+GNU General Public License for more details.
+
+You should have received a copy of the GNU General Public License
+along with this program.  If not, see <http://www.gnu.org/licenses/>.
+*/
+#include <stdint.h>
+#include <stdbool.h>
+#include "wait.h"
+#include "util.h"
+#include "matrix.h"
+#include "quantum.h"
+
+// Encoder things
+#define ENC_SW F7
+static bool read_encoder_switches(matrix_row_t current_matrix[], uint8_t current_row);
+
+static const pin_t row_pins[MATRIX_ROWS] = MATRIX_ROW_PINS;
+static const pin_t col_pins[MATRIX_COLS] = MATRIX_COL_PINS;
+
+/* matrix state(1:on, 0:off) */
+extern matrix_row_t raw_matrix[MATRIX_ROWS];  // raw values
+extern matrix_row_t matrix[MATRIX_ROWS];      // debounced values
+
+
+static void select_row(uint8_t row) {
+    setPinOutput(row_pins[row]);
+    writePinLow(row_pins[row]);
+}
+
+static void unselect_row(uint8_t row) { setPinInputHigh(row_pins[row]); }
+
+static void unselect_rows(void) {
+    for (uint8_t x = 0; x < MATRIX_ROWS; x++) {
+        setPinInputHigh(row_pins[x]);
+    }
+}
+
+static void init_pins(void) {
+    unselect_rows();
+    for (uint8_t x = 0; x < MATRIX_COLS; x++) {
+        setPinInputHigh(col_pins[x]);
+    }
+}
+
+static bool read_cols_on_row(matrix_row_t current_matrix[], uint8_t current_row) {
+    // Store last value of row prior to reading
+    matrix_row_t last_row_value = current_matrix[current_row];
+
+    // Clear data in matrix row
+    current_matrix[current_row] = 0;
+
+    // Select row and wait for row selecton to stabilize
+    select_row(current_row);
+    wait_us(30);
+
+    // For each col...
+    for (uint8_t col_index = 0; col_index < MATRIX_COLS; col_index++) {
+        // Select the col pin to read (active low)
+        uint8_t pin_state = readPin(col_pins[col_index]);
+
+        // Populate the matrix row with the state of the col pin
+        current_matrix[current_row] |= pin_state ? 0 : (MATRIX_ROW_SHIFTER << col_index);
+    }
+
+    // Unselect row
+    unselect_row(current_row);
+
+    return (last_row_value != current_matrix[current_row]);
+}
+
+
+void matrix_init_custom(void) {
+    // initialize key pins
+    setPinInput(ENC_SW);
+    init_pins();
+}
+
+bool matrix_scan_custom(void) {
+    bool changed = false;
+
+    // Set row, read cols
+    for (uint8_t current_row = 0; current_row < MATRIX_ROWS; current_row++) {
+        changed |= read_cols_on_row(raw_matrix, current_row);
+    }
+
+    // Read encoder switches, already debounced
+    changed |= read_encoder_switches(matrix, 2);
+
+    return changed;
+}
+
+static bool read_encoder_switches(matrix_row_t current_matrix[], uint8_t current_row) {
+    // Store last value of row prior to reading
+    matrix_row_t last_row_value = current_matrix[current_row];
+
+    // Clear data in matrix row
+    current_matrix[current_row] = 0;
+
+    // Debounce the encoder buttons using a shift register
+    static uint8_t btn_1_array;
+    bool           btn_1_pressed = 0;
+    btn_1_array <<= 1;
+    btn_1_array |= readPin(ENC_SW);
+    (btn_1_array == 0b11111111) ? (btn_1_pressed = 1) : (btn_1_pressed = 0);
+
+    // Populate the matrix row with the state of the encoder
+    current_matrix[current_row] |= btn_1_pressed ? (1 << 0) : 0;
+
+    return (last_row_value != current_matrix[current_row]);
+}

keyboards/mexsistor/ludmila/readme.md

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+# ludmila
+
+![ludmila](https://mexsistor.com/wp-content/uploads/2020/09/IMG_2249-scaled.jpg)
+
+Ludmila v1 is a 4 Key Macropad with one rotary encoder.
+
+* Keyboard Maintainer: [Kevin M.](https://github.com/mexsistor)
+* Hardware Supported: Ludmila PCB (atmega32u4)
+* Hardware Availability: [Kevin M.](https://mexsistor.com/producto/ludmilapad/)
+
+Make example for this keyboard (after setting up your build environment):
+
+    make mexsistor/ludmila:default
+
+Flashing example for this keyboard:
+
+    make mexsistor/ludmila:default:flash
+
+See the [build environment setup](https://docs.qmk.fm/#/getting_started_build_tools) and the [make instructions](https://docs.qmk.fm/#/getting_started_make_guide) for more information. Brand new to QMK? Start with our [Complete Newbs Guide](https://docs.qmk.fm/#/newbs).

keyboards/mexsistor/ludmila/rules.mk

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+# MCU name
+MCU = atmega32u4
+
+# Bootloader selection
+BOOTLOADER = atmel-dfu
+
+# Build Options
+#   change yes to no to disable
+#
+CUSTOM_MATRIX = lite
+SRC = matrix.c
+BOOTMAGIC_ENABLE = lite     # Virtual DIP switch configuration
+MOUSEKEY_ENABLE = yes       # Mouse keys
+EXTRAKEY_ENABLE = yes       # Audio control and System control
+CONSOLE_ENABLE = no         # Console for debug
+COMMAND_ENABLE = no         # Commands for debug and configuration
+# Do not enable SLEEP_LED_ENABLE. it uses the same timer as BACKLIGHT_ENABLE
+SLEEP_LED_ENABLE = no       # Breathing sleep LED during USB suspend
+# if this doesn't work, see here: https://github.com/tmk/tmk_keyboard/wiki/FAQ#nkro-doesnt-work
+NKRO_ENABLE = no            # USB Nkey Rollover
+BACKLIGHT_ENABLE = no       # Enable keyboard backlight functionality
+RGBLIGHT_ENABLE = yes        # Enable keyboard RGB underglow
+BLUETOOTH_ENABLE = no       # Enable Bluetooth
+AUDIO_ENABLE = no           # Audio output
+ENCODER_ENABLE = yes