Add a-ball handwired trackball based on ADSN9800 (#9015)

* Initial commit of kball

* Pretty much working

* Rename to aball

* Cleanup

* Fix typo and make instructions

* Refactor to use qmk spi

* Suggestions from ZVECR

* Update keyboards/handwired/aball/adns9800_srom_A6.h

* Update keyboards/handwired/aball/adns.c

* Update keyboards/handwired/aball/adns.c

* Update keyboards/handwired/aball/adns.c

* Added copyright and source attribution

* Update keyboards/handwired/aball/rules.mk

Include as quantum lib to help avoid timing issues with LTO

* Only send report on change, adj sensitivity, fix src include

* Fix issue causing constant reports and bad clamping

* Streamline conversion to int, add required wait before burst read

* Changes to track develop

* Update rules with new feature descriptors, add info.json

* Add stub layout

* Rework / cleanup key matrix.  Add missing CS pin define for new ADNS driver

* Add stub keymap to enable compile

keyboards/handwired/aball/aball.c

@@ -0,0 +1,18 @@
+/* Copyright 2020 Richard Sutherland
+ *
+ * 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 "aball.h"
+const uint16_t PROGMEM keymaps[][MATRIX_ROWS][MATRIX_COLS] = { };

keyboards/handwired/aball/aball.h

@@ -0,0 +1,29 @@
+/* Copyright 2020 Richard Sutherland
+ *
+ * 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) {{ KC_NO }}

keyboards/handwired/aball/config.h

@@ -0,0 +1,35 @@
+/*
+Copyright 2020 Richard Sutherland
+
+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 0xFEED
+#define PRODUCT_ID 0xC2F0
+#define DEVICE_VER 0x0001
+#define MANUFACTURER Richard Sutherland
+#define PRODUCT ABall
+
+/* key matrix size */
+#define MATRIX_ROWS 1
+#define MATRIX_COLS 1
+
+#define DIRECT_PINS {{NO_PIN}}
+
+#define ADNS9800_CS_PIN F7

keyboards/handwired/aball/info.json

@@ -0,0 +1,12 @@
+{
+    "keyboard_name": "aball",
+    "url": "https://github.com/brickbots/aball/",
+    "maintainer": "@brickbots",
+    "layouts": {
+        "LAYOUT": {
+            "layout": [
+                {"x":0, "y":0}
+            ]
+        }
+    }
+}

keyboards/handwired/aball/keymaps/default/keymap.c

@@ -0,0 +1,18 @@
+/* Copyright 2020 Richard Sutherland
+ *
+ * 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
+
+

keyboards/handwired/aball/readme.md

@@ -0,0 +1,14 @@
+# ABall
+
+Your keyboard has plenty of buttons, why do you need more on your pointing device? ABall is a buttonless trackball designed to
+fit nicely next to a kyria, or other keyboard which serves as the mouse buttons. For my use I have left, middle and right mouse
+buttons on a layer along with keys for scroll up and down which I operate with my left hand while my right hand uses the ball for pointing.
+
+* Keyboard Maintainer: [Richard Sutherland](https://github.com/brickbots)
+* Special thanks to the Oddball for doing the heavy lifing with ADNS suport: [atulloh.github.io/oddball](https://atulloh.github.io/oddball)
+
+Make example for this keyboard (after setting up your build environment):
+
+    make handwired/aball:default
+
+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/handwired/aball/rules.mk

@@ -0,0 +1,22 @@
+# MCU name
+MCU = atmega32u4
+
+# Bootloader selection
+BOOTLOADER = atmel-dfu
+
+# Build Options
+#   change yes to no to disable
+#
+BOOTMAGIC_ENABLE = no       # Enable Bootmagic Lite
+MOUSEKEY_ENABLE = yes       # Mouse keys
+EXTRAKEY_ENABLE = no        # Audio control and System control
+CONSOLE_ENABLE = no         # Console for debug
+COMMAND_ENABLE = no         # Commands for debug and configuration
+NKRO_ENABLE = no            # Enable N-Key Rollover
+BACKLIGHT_ENABLE = no       # Enable keyboard backlight functionality
+RGBLIGHT_ENABLE = no        # Enable keyboard RGB underglow
+AUDIO_ENABLE = no           # Audio output
+
+# Add trackball support
+POINTING_DEVICE_ENABLE = yes
+POINTING_DEVICE_DRIVER = adns9800