[Keyboard] Oddball keyboard (#8352)

* Initial commit of oddball keyboard

* Update oddball project url

* Update pointer functions to only run on master side

* Add unique product version

* Capitalise product name

* Convert oddball keymap layer flags to enum

* Remove commented keyboard boilerplate code

* Remove unused keymap config

* Fix incorrect layout in info.json

* Add markdown link text in readme

9 files changed, 917 insertions, 0 deletions

diff --git a/keyboards/oddball/adns.c b/keyboards/oddball/adns.c
new file mode 100644
index 0000000000..35225f042b
--- /dev/null
+++ b/keyboards/oddball/adns.c
@@ -0,0 +1,270 @@
+#include <avr/io.h>
+#include <avr/interrupt.h>
+#include "quantum.h"
+#include "pointing_device.h"
+#include "adns9800_srom_A4.h"
+#include "../../lib/lufa/LUFA/Drivers/Peripheral/SPI.h"
+
+// registers
+#define REG_Product_ID                           0x00
+#define REG_Revision_ID                          0x01
+#define REG_Motion                               0x02
+#define REG_Delta_X_L                            0x03
+#define REG_Delta_X_H                            0x04
+#define REG_Delta_Y_L                            0x05
+#define REG_Delta_Y_H                            0x06
+#define REG_SQUAL                                0x07
+#define REG_Pixel_Sum                            0x08
+#define REG_Maximum_Pixel                        0x09
+#define REG_Minimum_Pixel                        0x0a
+#define REG_Shutter_Lower                        0x0b
+#define REG_Shutter_Upper                        0x0c
+#define REG_Frame_Period_Lower                   0x0d
+#define REG_Frame_Period_Upper                   0x0e
+#define REG_Configuration_I                      0x0f
+#define REG_Configuration_II                     0x10
+#define REG_Frame_Capture                        0x12
+#define REG_SROM_Enable                          0x13
+#define REG_Run_Downshift                        0x14
+#define REG_Rest1_Rate                           0x15
+#define REG_Rest1_Downshift                      0x16
+#define REG_Rest2_Rate                           0x17
+#define REG_Rest2_Downshift                      0x18
+#define REG_Rest3_Rate                           0x19
+#define REG_Frame_Period_Max_Bound_Lower         0x1a
+#define REG_Frame_Period_Max_Bound_Upper         0x1b
+#define REG_Frame_Period_Min_Bound_Lower         0x1c
+#define REG_Frame_Period_Min_Bound_Upper         0x1d
+#define REG_Shutter_Max_Bound_Lower              0x1e
+#define REG_Shutter_Max_Bound_Upper              0x1f
+#define REG_LASER_CTRL0                          0x20
+#define REG_Observation                          0x24
+#define REG_Data_Out_Lower                       0x25
+#define REG_Data_Out_Upper                       0x26
+#define REG_SROM_ID                              0x2a
+#define REG_Lift_Detection_Thr                   0x2e
+#define REG_Configuration_V                      0x2f
+#define REG_Configuration_IV                     0x39
+#define REG_Power_Up_Reset                       0x3a
+#define REG_Shutdown                             0x3b
+#define REG_Inverse_Product_ID                   0x3f
+#define REG_Motion_Burst                         0x50
+#define REG_SROM_Load_Burst                      0x62
+#define REG_Pixel_Burst                          0x64
+
+// pins
+#define NCS 0
+
+extern const uint16_t firmware_length;
+extern const uint8_t firmware_data[];
+
+enum motion_burst_property{
+    motion = 0,
+    observation,
+    delta_x_l,
+    delta_x_h,
+    delta_y_l,
+    delta_y_h,
+    squal,
+    pixel_sum,
+    maximum_pixel,
+    minimum_pixel,
+    shutter_upper,
+    shutter_lower,
+    frame_period_upper,
+    frame_period_lower,
+    end_data
+};
+
+// used to track the motion delta between updates
+volatile int32_t delta_x;
+volatile int32_t delta_y;
+
+void adns_begin(void){
+    PORTB &= ~ (1 << NCS);
+}
+
+void adns_end(void){
+    PORTB |= (1 << NCS);
+}
+
+void adns_write(uint8_t reg_addr, uint8_t data){
+
+    adns_begin();
+
+    //send address of the register, with MSBit = 1 to indicate it's a write
+    SPI_TransferByte(reg_addr | 0x80 );
+    SPI_TransferByte(data);
+
+    // tSCLK-NCS for write operation
+    wait_us(20);
+
+    adns_end();
+
+    // tSWW/tSWR (=120us) minus tSCLK-NCS. Could be shortened, but is looks like a safe lower bound
+    wait_us(100);
+}
+
+uint8_t adns_read(uint8_t reg_addr){
+
+    adns_begin();
+
+    // send adress of the register, with MSBit = 0 to indicate it's a read
+    SPI_TransferByte(reg_addr & 0x7f );
+    uint8_t data = SPI_TransferByte(0);
+
+    // tSCLK-NCS for read operation is 120ns
+    wait_us(1);
+
+    adns_end();
+
+    //  tSRW/tSRR (=20us) minus tSCLK-NCS
+    wait_us(19);
+
+    return data;
+}
+
+void pointing_device_init(void) {
+
+    if(!is_keyboard_master())
+        return;
+
+    // interrupt 2
+    EICRA &= ~(1 << 4);
+    EICRA |= (1 << 5);
+    EIMSK |= (1<<INT2);
+
+    // mode 3
+    SPI_Init(
+        SPI_SPEED_FCPU_DIV_8 |
+        SPI_ORDER_MSB_FIRST |
+        SPI_SCK_LEAD_FALLING |
+        SPI_SAMPLE_TRAILING |
+        SPI_MODE_MASTER);
+
+    // set B0 output
+    DDRB |= (1 << 0);
+
+    // reset serial port
+    adns_end();
+    adns_begin();
+    adns_end();
+
+    // reboot
+    adns_write(REG_Power_Up_Reset, 0x5a);
+    wait_ms(50);
+
+    // read registers and discard
+    adns_read(REG_Motion);
+    adns_read(REG_Delta_X_L);
+    adns_read(REG_Delta_X_H);
+    adns_read(REG_Delta_Y_L);
+    adns_read(REG_Delta_Y_H);
+
+    // upload firmware
+
+    // set the configuration_IV register in 3k firmware mode
+    // bit 1 = 1 for 3k mode, other bits are reserved
+    adns_write(REG_Configuration_IV, 0x02);
+
+    // write 0x1d in SROM_enable reg for initializing
+    adns_write(REG_SROM_Enable, 0x1d);
+
+    // wait for more than one frame period
+    // assume that the frame rate is as low as 100fps... even if it should never be that low
+    wait_ms(10);
+
+    // write 0x18 to SROM_enable to start SROM download
+    adns_write(REG_SROM_Enable, 0x18);
+
+    // write the SROM file (=firmware data)
+    adns_begin();
+
+    // write burst destination adress
+    SPI_TransferByte(REG_SROM_Load_Burst | 0x80);
+    wait_us(15);
+
+    // send all bytes of the firmware
+    unsigned char c;
+    for(int i = 0; i < firmware_length; i++){
+        c = (unsigned char)pgm_read_byte(firmware_data + i);
+        SPI_TransferByte(c);
+        wait_us(15);
+    }
+
+    adns_end();
+
+    wait_ms(10);
+
+    // enable laser(bit 0 = 0b), in normal mode (bits 3,2,1 = 000b)
+    // reading the actual value of the register is important because the real
+    // default value is different from what is said in the datasheet, and if you
+    // change the reserved bytes (like by writing 0x00...) it would not work.
+    uint8_t laser_ctrl0 = adns_read(REG_LASER_CTRL0);
+    adns_write(REG_LASER_CTRL0, laser_ctrl0 & 0xf0);
+
+    wait_ms(1);
+
+    // set the configuration_I register to set the CPI
+    // 0x01 = 50, minimum
+    // 0x44 = 3400, default
+    // 0x8e = 7100
+    // 0xA4 = 8200, maximum
+    adns_write(REG_Configuration_I, 0x04);
+
+    wait_ms(100);
+}
+
+void pointing_device_task(void) {
+
+    if(!is_keyboard_master())
+        return;
+
+    report_mouse_t report = pointing_device_get_report();
+
+    // clamp deltas from -127 to 127
+    report.x = delta_x < -127 ? 127 : delta_x > 127 ? 127 : delta_x;
+    report.x = -report.x;
+
+    report.y = delta_y < -127 ? 127 : delta_y > 127 ? 127 : delta_y;
+
+    // reset deltas
+    delta_x = 0;
+    delta_y = 0;
+
+    pointing_device_set_report(report);
+    pointing_device_send();
+}
+
+int16_t convertDeltaToInt(uint8_t high, uint8_t low){
+
+    // join bytes into twos compliment
+    uint16_t twos_comp = (high << 8) | low;
+
+    // convert twos comp to int
+    if (twos_comp & 0x8000)
+        return -1 * ((twos_comp ^ 0xffff) + 1);
+
+    return twos_comp;
+}
+
+ISR(INT2_vect) {
+    // called on interrupt 2 when sensed motion
+    // copy burst data from the respective registers
+
+    adns_begin();
+
+    // send adress of the register, with MSBit = 1 to indicate it's a write
+    SPI_TransferByte(REG_Motion_Burst & 0x7f);
+
+    uint8_t burst_data[pixel_sum];
+
+    for (int i = 0; i < pixel_sum; ++i) {
+        burst_data[i] = SPI_TransferByte(0);
+    }
+
+    delta_x += convertDeltaToInt(burst_data[delta_x_h], burst_data[delta_x_l]);
+    delta_y += convertDeltaToInt(burst_data[delta_y_h], burst_data[delta_y_l]);
+
+    adns_end();
+}
diff --git a/keyboards/oddball/adns9800_srom_A4.h b/keyboards/oddball/adns9800_srom_A4.h
new file mode 100644
index 0000000000..11958d21ef
--- /dev/null
+++ b/keyboards/oddball/adns9800_srom_A4.h
@@ -0,0 +1,212 @@
+#pragma once
+
+#include <avr/pgmspace.h>
+
+const uint16_t firmware_length = 3070;
+
+const uint8_t firmware_data[] PROGMEM = {
+0x03, 0xa4, 0x6e, 0x16, 0x6d, 0x89, 0x3e, 0xfe, 0x5f, 0x1c, 0xb8, 0xf2, 0x47, 0x0c, 0x7b,
+0x74, 0x6a, 0x56, 0x0f, 0x7d, 0x76, 0x71, 0x4b, 0x0c, 0x97, 0xb6, 0xcf, 0xfd, 0x78, 0x72,
+0x66, 0x2f, 0xbd, 0xf8, 0x53, 0x24, 0xab, 0xd4, 0x2c, 0xb0, 0xe4, 0x32, 0xf1, 0x6a, 0x56,
+0x2e, 0xbf, 0xfc, 0x7a, 0x57, 0x0d, 0x79, 0x70, 0x66, 0x46, 0x0e, 0x7f, 0x5d, 0x19, 0x91,
+0xaa, 0xc2, 0x0d, 0x8e, 0x7f, 0x5d, 0x19, 0xb0, 0xe2, 0x46, 0xef, 0x5c, 0x3a, 0xd7, 0x2c,
+0xbb, 0xf4, 0x6a, 0x37, 0xcd, 0x18, 0xb2, 0xc7, 0x0c, 0x9a, 0x97, 0x8f, 0x52, 0xfd, 0x0d,
+0xb8, 0x41, 0x00, 0x9e, 0x8e, 0x9a, 0x1e, 0x6d, 0x0c, 0xe2, 0xaa, 0x13, 0x93, 0xb8, 0xc1,
+0x2a, 0x29, 0xbb, 0x0b, 0xe3, 0x71, 0x08, 0x6d, 0xfd, 0xb6, 0xd9, 0xcf, 0x65, 0x21, 0x27,
+0x45, 0x1b, 0xbe, 0xe2, 0x61, 0x86, 0x3c, 0xbf, 0x68, 0x9c, 0xd6, 0x75, 0x01, 0x5e, 0xe0,
+0xc6, 0x92, 0x79, 0xf4, 0x6a, 0xa9, 0xbb, 0x2a, 0x79, 0xd0, 0xe1, 0x5c, 0x32, 0xb1, 0x5a,
+0x1b, 0xba, 0xaf, 0x11, 0xea, 0x24, 0x6a, 0x83, 0x4f, 0x8d, 0xed, 0x19, 0x62, 0x70, 0x54,
+0xfb, 0x0e, 0x1f, 0x83, 0xcc, 0xf0, 0xb7, 0xae, 0x05, 0xd3, 0x42, 0x5d, 0x48, 0xa0, 0x7a,
+0x0b, 0x73, 0xb3, 0xc8, 0xa6, 0xb7, 0x1b, 0x08, 0x13, 0x9b, 0x89, 0x44, 0x42, 0xae, 0xd8,
+0x6a, 0xba, 0x9b, 0x84, 0x25, 0x8b, 0xa4, 0x5e, 0x0b, 0x85, 0xb0, 0x8f, 0x8d, 0x80, 0x9c,
+0xd1, 0x52, 0xc7, 0xcb, 0xff, 0x8d, 0x8b, 0xdd, 0x87, 0xf2, 0x63, 0xca, 0xe7, 0x4f, 0x4a,
+0x57, 0x3c, 0xdf, 0xaf, 0xcb, 0x5c, 0xbb, 0x39, 0x0b, 0x01, 0x9c, 0x79, 0x22, 0x15, 0xb8,
+0xa0, 0xd3, 0x72, 0x02, 0x35, 0x20, 0x40, 0xe0, 0x17, 0xde, 0x89, 0x88, 0xce, 0xe9, 0x2b,
+0x75, 0xba, 0xa0, 0x96, 0x24, 0x1e, 0x71, 0xb5, 0x15, 0x00, 0x61, 0xe0, 0x5c, 0x93, 0x4e,
+0xea, 0x53, 0xd0, 0xfc, 0xef, 0xae, 0x2b, 0xeb, 0x8f, 0xc7, 0x69, 0x68, 0xc7, 0xfc, 0x1a,
+0x1f, 0x41, 0x0d, 0xd0, 0xc1, 0x03, 0xaf, 0xc9, 0xfd, 0xe4, 0x21, 0x43, 0xc4, 0xef, 0xc2,
+0xdd, 0x7b, 0x73, 0xbc, 0xca, 0xf4, 0xa5, 0x2e, 0x83, 0x90, 0x1f, 0x78, 0x41, 0xc3, 0x13,
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+0x06, 0x21, 0x55, 0xba, 0xba, 0xda, 0xf9, 0x3b, 0xe9, 0x5d, 0xc9, 0x1f, 0x6f, 0x61, 0x3b,
+0xc2, 0x7e, 0x3d, 0x07, 0xa6, 0x84, 0x91, 0xb7, 0x63, 0x7e, 0x5f, 0xfc, 0xd1, 0x7d, 0x08,
+0xdd, 0x79, 0x07, 0xe1, 0x9e, 0x11, 0x25, 0xe8, 0x10, 0x05, 0x66, 0xfa, 0xca, 0xc3, 0x41,
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+0x4d, 0xe0, 0x03, 0x93, 0xfb, 0xb4, 0xd8, 0x11, 0x21, 0x11, 0x66, 0x97, 0xb9, 0xba, 0x81,
+0x29, 0xc2, 0x8f, 0x8c, 0x14, 0x18, 0x22, 0x94, 0xc4, 0xb0, 0xf1, 0x10, 0xc4, 0x8b, 0x5d,
+0x8d, 0x7f, 0x14, 0xaf, 0x46, 0x19, 0x36, 0xa4, 0x36, 0x22, 0x18, 0x18, 0xe3, 0xab, 0x2c,
+0x91, 0x03, 0xf7, 0xc5, 0xf5, 0xf5, 0x59, 0xc2, 0xd2, 0xf7, 0xc7, 0x64, 0x54, 0x76, 0xfb,
+0x71, 0x70, 0xe8, 0xb2, 0x44, 0xa1, 0x2d, 0x59, 0x17, 0x02, 0xd6, 0x6f, 0x7a, 0xeb, 0xe0,
+0x53, 0x81, 0xf6, 0x5e, 0x7f, 0x37, 0xd4, 0x52, 0x13, 0x04, 0x44, 0xd5, 0xc8, 0xd3, 0xdd,
+0x6f, 0xd5, 0xfb, 0x71, 0x20, 0xe3, 0x0d, 0x0c, 0x47, 0x25, 0xa1, 0x41, 0xd2, 0xc7, 0xe5,
+0xc9, 0xd9, 0x27, 0xa5, 0x38, 0xe4, 0x30, 0xbb, 0x86, 0x07, 0x84, 0xef, 0x24, 0x9f, 0xf9,
+0x52, 0x74, 0xd2, 0x50, 0x73, 0xc4, 0x27, 0x73, 0x3b, 0x8d, 0x9c, 0xa6, 0xf6, 0x4b, 0x25,
+0x91, 0xc5, 0x9e, 0x1e, 0xb2, 0x78, 0x0c, 0x23, 0x80, 0xdd, 0xa3, 0x21, 0xf5, 0xa9, 0x9e,
+0x00, 0x16, 0x19, 0xbc, 0xd9, 0x55, 0x09, 0x90, 0xa2, 0xc6, 0xef, 0x3d, 0xf8, 0x72, 0x66,
+0x2f, 0xdc, 0x3a, 0xf6, 0x4f, 0xfd, 0x59, 0x30, 0xe2, 0x27, 0xcc, 0xfb, 0x55, 0x09, 0x71,
+0x41, 0xe1, 0x21, 0xa1, 0xa1, 0xc0, 0xe3, 0x25, 0xa9, 0xd0, 0x22, 0xc6, 0xef, 0x5c, 0x1b,
+0xb4, 0xea, 0x56, 0x2e, 0xbf, 0xfc, 0x5b, 0x34, 0xcb, 0x14, 0x8b, 0x94, 0xaa, 0xb7, 0xec,
+0x5a, 0x36, 0xcf, 0x1c, 0xba, 0xf6, 0x4d, 0xdb, 0x35, 0xf3 };
diff --git a/keyboards/oddball/config.h b/keyboards/oddball/config.h
new file mode 100644
index 0000000000..b3679bea4c
--- /dev/null
+++ b/keyboards/oddball/config.h
@@ -0,0 +1,255 @@
+/*
+Copyright 2020 Alexander Tulloh
+
+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 0xCA49
+#define DEVICE_VER 0x0001
+#define MANUFACTURER Alexander Tulloh
+#define PRODUCT Oddball
+#define DESCRIPTION A ballin keyboard
+
+/* key matrix size */
+#define MATRIX_ROWS 8
+#define MATRIX_COLS 6
+
+/*
+ * 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 { F6, B5, B6, F7 }
+#define MATRIX_COL_PINS { D6, D7, B4, D3, C6, C7 }
+#define UNUSED_PINS { B7, D4, D5, E6, F0, F1, F4, F5 }
+
+/* COL2ROW, ROW2COL*/
+#define DIODE_DIRECTION COL2ROW
+
+/*
+ * Split Keyboard specific options, make sure you have 'SPLIT_KEYBOARD = yes' in your rules.mk, and define SOFT_SERIAL_PIN.
+ */
+// #define SOFT_SERIAL_PIN D0  // or D1, D2, D3, E6
+#define USE_I2C
+#define SPLIT_USB_DETECT
+#define MASTER_RIGHT
+
+// #define BACKLIGHT_PIN B7
+// #define BACKLIGHT_BREATHING
+// #define BACKLIGHT_LEVELS 3
+
+// #define RGB_DI_PIN E2
+// #ifdef RGB_DI_PIN
+//   #define RGBLED_NUM 16
+//   #define RGBLIGHT_HUE_STEP 8
+//   #define RGBLIGHT_SAT_STEP 8
+//   #define RGBLIGHT_VAL_STEP 8
+//   #define RGBLIGHT_LIMIT_VAL 255 /* The maximum brightness level */
+//   #define RGBLIGHT_SLEEP  /* If defined, the RGB lighting will be switched off when the host goes to sleep */
+// /*== all animations enable ==*/
+//   #define RGBLIGHT_ANIMATIONS
+// /*== or choose animations ==*/
+//   #define RGBLIGHT_EFFECT_BREATHING
+//   #define RGBLIGHT_EFFECT_RAINBOW_MOOD
+//   #define RGBLIGHT_EFFECT_RAINBOW_SWIRL
+//   #define RGBLIGHT_EFFECT_SNAKE
+//   #define RGBLIGHT_EFFECT_KNIGHT
+//   #define RGBLIGHT_EFFECT_CHRISTMAS
+//   #define RGBLIGHT_EFFECT_STATIC_GRADIENT
+//   #define RGBLIGHT_EFFECT_RGB_TEST
+//   #define RGBLIGHT_EFFECT_ALTERNATING
+// /*== customize breathing effect ==*/
+//   /*==== (DEFAULT) use fixed table instead of exp() and sin() ====*/
+//   #define RGBLIGHT_BREATHE_TABLE_SIZE 256      // 256(default) or 128 or 64
+//   /*==== use exp() and sin() ====*/
+//   #define RGBLIGHT_EFFECT_BREATHE_CENTER 1.85  // 1 to 2.7
+//   #define RGBLIGHT_EFFECT_BREATHE_MAX    255   // 0 to 255
+// #endif
+
+/* Debounce reduces chatter (unintended double-presses) - set 0 if debouncing is not needed */
+#define DEBOUNCE 5
+
+/* define if matrix has ghost (lacks anti-ghosting diodes) */
+//#define MATRIX_HAS_GHOST
+
+/* Mechanical locking support. Use KC_LCAP, KC_LNUM or KC_LSCR instead in keymap */
+#define LOCKING_SUPPORT_ENABLE
+/* Locking resynchronize hack */
+#define LOCKING_RESYNC_ENABLE
+
+/* If defined, GRAVE_ESC will always act as ESC when CTRL is held.
+ * This is userful for the Windows task manager shortcut (ctrl+shift+esc).
+ */
+// #define GRAVE_ESC_CTRL_OVERRIDE
+
+/*
+ * Force NKRO
+ *
+ * Force NKRO (nKey Rollover) to be enabled by default, regardless of the saved
+ * state in the bootmagic EEPROM settings. (Note that NKRO must be enabled in the
+ * makefile for this to work.)
+ *
+ * If forced on, NKRO can be disabled via magic key (default = LShift+RShift+N)
+ * until the next keyboard reset.
+ *
+ * NKRO may prevent your keystrokes from being detected in the BIOS, but it is
+ * fully operational during normal computer usage.
+ *
+ * For a less heavy-handed approach, enable NKRO via magic key (LShift+RShift+N)
+ * or via bootmagic (hold SPACE+N while plugging in the keyboard). Once set by
+ * bootmagic, NKRO mode will always be enabled until it is toggled again during a
+ * power-up.
+ *
+ */
+//#define FORCE_NKRO
+
+/*
+ * Magic Key Options
+ *
+ * Magic keys are hotkey commands that allow control over firmware functions of
+ * the keyboard. They are best used in combination with the HID Listen program,
+ * found here: https://www.pjrc.com/teensy/hid_listen.html
+ *
+ * The options below allow the magic key functionality to be changed. This is
+ * useful if your keyboard/keypad is missing keys and you want magic key support.
+ *
+ */
+
+/* key combination for magic key command */
+/* defined by default; to change, uncomment and set to the combination you want */
+// #define IS_COMMAND() (get_mods() == MOD_MASK_SHIFT)
+
+/* control how magic key switches layers */
+//#define MAGIC_KEY_SWITCH_LAYER_WITH_FKEYS  true
+//#define MAGIC_KEY_SWITCH_LAYER_WITH_NKEYS  true
+//#define MAGIC_KEY_SWITCH_LAYER_WITH_CUSTOM false
+
+/* override magic key keymap */
+//#define MAGIC_KEY_SWITCH_LAYER_WITH_FKEYS
+//#define MAGIC_KEY_SWITCH_LAYER_WITH_NKEYS
+//#define MAGIC_KEY_SWITCH_LAYER_WITH_CUSTOM
+//#define MAGIC_KEY_HELP           H
+//#define MAGIC_KEY_HELP_ALT       SLASH
+//#define MAGIC_KEY_DEBUG          D
+//#define MAGIC_KEY_DEBUG_MATRIX   X
+//#define MAGIC_KEY_DEBUG_KBD      K
+//#define MAGIC_KEY_DEBUG_MOUSE    M
+//#define MAGIC_KEY_VERSION        V
+//#define MAGIC_KEY_STATUS         S
+//#define MAGIC_KEY_CONSOLE        C
+//#define MAGIC_KEY_LAYER0         0
+//#define MAGIC_KEY_LAYER0_ALT     GRAVE
+//#define MAGIC_KEY_LAYER1         1
+//#define MAGIC_KEY_LAYER2         2
+//#define MAGIC_KEY_LAYER3         3
+//#define MAGIC_KEY_LAYER4         4
+//#define MAGIC_KEY_LAYER5         5
+//#define MAGIC_KEY_LAYER6         6
+//#define MAGIC_KEY_LAYER7         7
+//#define MAGIC_KEY_LAYER8         8
+//#define MAGIC_KEY_LAYER9         9
+//#define MAGIC_KEY_BOOTLOADER     B
+//#define MAGIC_KEY_BOOTLOADER_ALT ESC
+//#define MAGIC_KEY_LOCK           CAPS
+//#define MAGIC_KEY_EEPROM         E
+//#define MAGIC_KEY_EEPROM_CLEAR   BSPACE
+//#define MAGIC_KEY_NKRO           N
+//#define MAGIC_KEY_SLEEP_LED      Z
+
+/*
+ * Feature disable options
+ *  These options are also useful to firmware size reduction.
+ */
+
+/* disable debug print */
+//#define NO_DEBUG
+
+/* disable print */
+//#define NO_PRINT
+
+/* disable action features */
+//#define NO_ACTION_LAYER
+//#define NO_ACTION_TAPPING
+//#define NO_ACTION_ONESHOT
+
+/* disable these deprecated features by default */
+#ifndef LINK_TIME_OPTIMIZATION_ENABLE
+  #define NO_ACTION_MACRO
+  #define NO_ACTION_FUNCTION
+#endif
+/*
+ * MIDI options
+ */
+
+/* Prevent use of disabled MIDI features in the keymap */
+//#define MIDI_ENABLE_STRICT 1
+
+/* enable basic MIDI features:
+   - MIDI notes can be sent when in Music mode is on
+*/
+//#define MIDI_BASIC
+
+/* enable advanced MIDI features:
+   - MIDI notes can be added to the keymap
+   - Octave shift and transpose
+   - Virtual sustain, portamento, and modulation wheel
+   - etc.
+*/
+//#define MIDI_ADVANCED
+
+/* override number of MIDI tone keycodes (each octave adds 12 keycodes and allocates 12 bytes) */
+//#define MIDI_TONE_KEYCODE_OCTAVES 1
+
+/*
+ * HD44780 LCD Display Configuration
+ */
+/*
+#define LCD_LINES           2     //< number of visible lines of the display
+#define LCD_DISP_LENGTH    16     //< visibles characters per line of the display
+
+#define LCD_IO_MODE      1            //< 0: memory mapped mode, 1: IO port mode
+
+#if LCD_IO_MODE
+#define LCD_PORT         PORTB        //< port for the LCD lines
+#define LCD_DATA0_PORT   LCD_PORT     //< port for 4bit data bit 0
+#define LCD_DATA1_PORT   LCD_PORT     //< port for 4bit data bit 1
+#define LCD_DATA2_PORT   LCD_PORT     //< port for 4bit data bit 2
+#define LCD_DATA3_PORT   LCD_PORT     //< port for 4bit data bit 3
+#define LCD_DATA0_PIN    4            //< pin for 4bit data bit 0
+#define LCD_DATA1_PIN    5            //< pin for 4bit data bit 1
+#define LCD_DATA2_PIN    6            //< pin for 4bit data bit 2
+#define LCD_DATA3_PIN    7            //< pin for 4bit data bit 3
+#define LCD_RS_PORT      LCD_PORT     //< port for RS line
+#define LCD_RS_PIN       3            //< pin  for RS line
+#define LCD_RW_PORT      LCD_PORT     //< port for RW line
+#define LCD_RW_PIN       2            //< pin  for RW line
+#define LCD_E_PORT       LCD_PORT     //< port for Enable line
+#define LCD_E_PIN        1            //< pin  for Enable line
+#endif
+*/
+
+/* Bootmagic Lite key configuration */
+// #define BOOTMAGIC_LITE_ROW 0
+// #define BOOTMAGIC_LITE_COLUMN 0
diff --git a/keyboards/oddball/info.json b/keyboards/oddball/info.json
new file mode 100644
index 0000000000..8b38c9fa83
--- /dev/null
+++ b/keyboards/oddball/info.json
@@ -0,0 +1,21 @@
+{
+    "keyboard_name": "Oddball",
+    "url": "https://atulloh.github.io/oddball",
+    "maintainer": "Alexander Tulloh",
+    "width": 14,
+    "height": 4.75,
+    "layouts": {
+        "LAYOUT": {
+            "layout": [
+                {"label":"sw1", "x":0, "y":0.37}, {"label":"sw2", "x":1, "y":0.37}, {"label":"sw3", "x":2, "y":0.12}, {"label":"sw4", "x":3, "y":0}, {"label":"sw5", "x":4, "y":0.12}, {"label":"sw6", "x":5, "y":0.25},
+                {"label":"sw6", "x":8 , "y":0.25}, {"label":"sw5", "x":9 , "y":0.12}, {"label":"sw4", "x":10, "y":0}, {"label":"sw3", "x":11, "y":0.12}, {"label":"sw2", "x":12, "y":0.37}, {"label":"sw1", "x":13, "y":0.37},
+                {"label":"sw7", "x":0, "y":1.37}, {"label":"sw8", "x":1, "y":1.37}, {"label":"sw9", "x":2, "y":1.12}, {"label":"sw10", "x":3, "y":1}, {"label":"sw11", "x":4, "y":1.12}, {"label":"sw12", "x":5, "y":1.25},
+                {"label":"sw12", "x":8, "y":1.25}, {"label":"sw11", "x":9, "y":1.12}, {"label":"sw10", "x":10, "y":1}, {"label":"sw9", "x":11, "y":1.12}, {"label":"sw8", "x":12, "y":1.37}, {"label":"sw7", "x":13, "y":1.37},
+                {"label":"sw13", "x":0, "y":2.37}, {"label":"sw14", "x":1, "y":2.37}, {"label":"sw15", "x":2, "y":2.12}, {"label":"sw16", "x":3, "y":2}, {"label":"sw17", "x":4, "y":2.12}, {"label":"sw18", "x":5, "y":2.25},
+                {"label":"sw18", "x":8, "y":2.25}, {"label":"sw17", "x":9, "y":2.12}, {"label":"sw16", "x":10, "y":2}, {"label":"sw15", "x":11, "y":2.12}, {"label":"sw14", "x":12, "y":2.37}, {"label":"sw13", "x":13, "y":2.37},
+                {"label":"sw19", "x":4.5, "y":3.5, "h":1.25}, {"label":"sw20", "x":5.5, "y":3.5, "h":1.25},
+                {"label":"sw20", "x":7.5, "y":3.5, "h":1.25}, {"label":"sw19", "x":8.5, "y":3.5, "h":1.25}
+            ]
+        }
+    }
+}
diff --git a/keyboards/oddball/keymaps/default/keymap.c b/keyboards/oddball/keymaps/default/keymap.c
new file mode 100644
index 0000000000..439e63cd63
--- /dev/null
+++ b/keyboards/oddball/keymaps/default/keymap.c
@@ -0,0 +1,46 @@
+/* Copyright 2020 Alexander Tulloh
+ *
+ * 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
+
+enum layer_names {
+    _QWERTY,
+    _LOWER,
+    _RAISE
+};
+
+const uint16_t PROGMEM keymaps[][MATRIX_ROWS][MATRIX_COLS] = {
+
+  [_QWERTY] = LAYOUT(
+     KC_BSPC,   KC_Q,    KC_W,    KC_E,    KC_R,       KC_T,          KC_Y,     KC_U,     KC_I,    KC_O,    KC_P,    KC_TAB,
+     KC_LALT,   KC_A,    KC_S,    KC_D,    KC_F,       KC_G,          KC_H,     KC_J,     KC_K,    KC_L,    KC_SCLN, KC_SPC,
+     KC_LSFT,   KC_Z,    KC_X,    KC_C,    KC_V,       KC_B,          KC_N,     KC_M,     KC_COMM, KC_DOT,  KC_SLSH, KC_RSFT,
+                                           MO(_LOWER), KC_LCTL,       _______,  MO(_RAISE)
+  ),
+
+  [_LOWER] = LAYOUT(
+     KC_DEL,    KC_EXLM, KC_AT,   KC_LCBR, KC_RCBR, KC_BTN3,       KC_DQUO,  KC_7,    KC_8,    KC_9,    KC_ASTR, KC_UNDS,
+     _______,   KC_HASH, KC_DLR,  KC_LPRN, KC_RPRN, KC_BTN2,       KC_QUOT,  KC_4,    KC_5,    KC_6,    KC_PLUS, KC_ENT,
+     _______,   KC_PERC, KC_CIRC, KC_LBRC, KC_RBRC, KC_BTN1,       KC_0,     KC_1,    KC_2,    KC_3,    KC_MINS, _______,
+                                           _______, _______,       _______,  _______
+  ),
+
+  [_RAISE] = LAYOUT(
+     _______,   KC_ESC,  KC_F7,   KC_F9,   KC_F9,   KC_F10,        KC_PIPE,  KC_PGUP, KC_UP,   KC_PGDN, KC_GRAVE, _______,
+     _______,   KC_LGUI, KC_F4,   KC_F5,   KC_F6,   KC_F11,        KC_AMPR,  KC_LEFT, KC_DOWN, KC_RGHT, KC_TILD,  _______,
+     _______,   KC_INS,  KC_F1,   KC_F2,   KC_F3,   KC_F12,        KC_EQUAL, KC_HOME, _______, KC_END,  KC_BSLS,  _______,
+                                           _______, _______,       _______,  _______
+  )
+};
diff --git a/keyboards/oddball/oddball.c b/keyboards/oddball/oddball.c
new file mode 100644
index 0000000000..5a2ce5ea0e
--- /dev/null
+++ b/keyboards/oddball/oddball.c
@@ -0,0 +1,17 @@
+/* Copyright 2020 Alexander Tulloh
+ *
+ * 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 "oddball.h"
diff --git a/keyboards/oddball/oddball.h b/keyboards/oddball/oddball.h
new file mode 100644
index 0000000000..1f52271dbd
--- /dev/null
+++ b/keyboards/oddball/oddball.h
@@ -0,0 +1,44 @@
+/* Copyright 2020 Alexander Tulloh
+ *
+ * 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( \
+    L00, L01, L02, L03, L04, L05,   R00, R01, R02, R03, R04, R05, \
+    L10, L11, L12, L13, L14, L15,   R10, R11, R12, R13, R14, R15, \
+    L20, L21, L22, L23, L24, L25,   R20, R21, R22, R23, R24, R25, \
+                        LT1, LT2,   RT1, RT2 \
+    ) \
+    { \
+        { L00, L01, L02, L03, L04, L05 }, \
+        { L10, L11, L12, L13, L14, L15 }, \
+        { L20, L21, L22, L23, L24, L25 }, \
+        { KC_NO, KC_NO, KC_NO, KC_NO, LT1, LT2 }, \
+        { R05, R04, R03, R02, R01, R00 }, \
+        { R15, R14, R13, R12, R11, R10 }, \
+        { R25, R24, R23, R22, R21, R20 }, \
+        { KC_NO, KC_NO, KC_NO, KC_NO, RT2, RT1 } \
+    }
diff --git a/keyboards/oddball/readme.md b/keyboards/oddball/readme.md
new file mode 100644
index 0000000000..3f4a4a1b23
--- /dev/null
+++ b/keyboards/oddball/readme.md
@@ -0,0 +1,13 @@
+# Oddball
+
+A split keyboard with trackball support.
+
+* Keyboard Maintainer: [Alexander Tulloh](https://github.com/atulloh)
+* Hardware Supported: Oddball PCB and plates, and using an [ADNS9800 and breakout board for mouse](https://www.tindie.com/products/jkicklighter/adns-9800-laser-motion-sensor/)
+* Hardware Availability: [atulloh.github.io/oddball](https://atulloh.github.io/oddball)
+
+Make example for this keyboard (after setting up your build environment):
+
+    make oddball: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).
diff --git a/keyboards/oddball/rules.mk b/keyboards/oddball/rules.mk
new file mode 100644
index 0000000000..af8c3d31d4
--- /dev/null
+++ b/keyboards/oddball/rules.mk
@@ -0,0 +1,39 @@
+# MCU name
+MCU = atmega32u4
+
+# Bootloader selection
+#   Teensy       halfkay
+#   Pro Micro    caterina
+#   Atmel DFU    atmel-dfu
+#   LUFA DFU     lufa-dfu
+#   QMK DFU      qmk-dfu
+#   ATmega32A    bootloadHID
+#   ATmega328P   USBasp
+BOOTLOADER = halfkay
+
+# Build Options
+#   change yes to no to disable
+#
+BOOTMAGIC_ENABLE = no       # 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 = yes        # 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 = no        # Enable keyboard RGB underglow
+MIDI_ENABLE = no            # MIDI support
+BLUETOOTH_ENABLE = no       # Enable Bluetooth with the Adafruit EZ-Key HID
+AUDIO_ENABLE = no           # Audio output on port C6
+FAUXCLICKY_ENABLE = no      # Use buzzer to emulate clicky switches
+HD44780_ENABLE = no         # Enable support for HD44780 based LCDs
+
+DEBOUNCE_TYPE = eager_pk
+SPLIT_KEYBOARD = yes
+
+# Add trackball support
+POINTING_DEVICE_ENABLE = yes
+SRC += adns.c