RIOT/boards/common/gd32v/include/cfg_i2c_default.h

/*
 * Copyright (C) 2023 Gunar Schorcht <gunar@schorcht.net>
 *
 * This file is subject to the terms and conditions of the GNU Lesser
 * General Public License v2.1. See the file LICENSE in the top level
 * directory for more details.
 */

/**
 * @ingroup     boards_common_gd32v
 * @{
 *
 * @file
 * @brief       Default I2C configuration for GD32VF103 boards
 *
 * @author      Gunar Schorcht <gunar@schorcht.net>
 */

#ifndef CFG_I2C_DEFAULT_H
#define CFG_I2C_DEFAULT_H

#include "periph_cpu.h"

#ifdef __cplusplus
extern "C" {
#endif

/**
 * @name    I2C configuration
 *
 * @note    This board may require external pullup resistors for i2c operation.
 * @{
 */

/**
 * @brief   Enable the second I2C device `I2C_DEV(1)` by default
 *
 */
#ifndef I2C_DEV_1_USED
#define I2C_DEV_1_USED
#endif

/**
 * @brief   Default I2C device configuration
 *
 * The default I2C device configuration allows to define up to two I2C devices
 * `I2C_DEV(0)` and `I2C_DEV(1)`. `I2C_DEV(0)` is always defined if the I2C
 * peripheral is enabled by the module `periph_spi`. The second I2C device
 * `I2C_DEV(1)` is only defined if `I2C_DEV_1_USED` is defined by the board.
 * This allows to use the default configuration with one or two I2C devices
 * depending on whether other peripherals are enabled that would collide with
 * the I2C devices.
 */
static const i2c_conf_t i2c_config[] = {
    {
        .dev            = I2C0,
        .speed          = I2C_SPEED_NORMAL,
        .scl_pin        = GPIO_PIN(PORT_B, 6),
        .sda_pin        = GPIO_PIN(PORT_B, 7),
        .rcu_mask       = RCU_APB1EN_I2C0EN_Msk,
        .irqn           = I2C0_EV_IRQn,
    },
    {
        .dev            = I2C1,
        .speed          = I2C_SPEED_NORMAL,
        .scl_pin        = GPIO_PIN(PORT_B, 10),
        .sda_pin        = GPIO_PIN(PORT_B, 11),
        .rcu_mask       = RCU_APB1EN_I2C1EN_Msk,
        .irqn           = I2C1_EV_IRQn,
    }
};

#define I2C_NUMOF   ARRAY_SIZE(i2c_config)
/** @} */

#ifdef __cplusplus
}
#endif

#endif /* CFG_I2C_DEFAULT_H */
/** @} */