qmk_firmware/keyboards/drop/cstm80/config.h

// Copyright 2023 Massdrop, Inc.
// SPDX-License-Identifier: GPL-2.0-or-later
#pragma once

#define I2C1_SCL_PIN B8
#define I2C1_SDA_PIN B9

#define EXTERNAL_EEPROM_I2C_BASE_ADDRESS 0b10101000
#define EXTERNAL_EEPROM_WP_PIN B7
#define EEPROM_I2C_24LC256

#define DRIVER_ADDR_1 0b1010000
#define DRIVER_ADDR_2 0b1011111
#define DRIVER_COUNT 2
#define RGB_MATRIX_LED_COUNT 88
#define ISSI_PWM_FREQUENCY 0b010 // 26k

#define RGB_DISABLE_WHEN_USB_SUSPENDED
#define RGB_MATRIX_KEYPRESSES
#define RGB_MATRIX_FRAMEBUFFER_EFFECTS

#define RGB_MATRIX_CAPS_LOCK_INDEX 48