qmk_firmware/keyboards/squiggle/rev1/config.h

#pragma once

#define DEVICE_VER      0x0001

/* key matrix size */
#define MATRIX_ROWS 8
#define MATRIX_COLS 5

/*
 * 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 { B1, B3, B2, B6 }
#define MATRIX_COL_PINS { C6, D7, E6, B4, B5 }

/* COL2ROW, ROW2COL*/
#define DIODE_DIRECTION COL2ROW

#define MASTER_LEFT