m5_unit_imu_wiring.hpp

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/*
 * SPDX-FileCopyrightText: 2026 M5Stack Technology CO LTD
 *
 * SPDX-License-Identifier: MIT
 */
#ifndef M5_UNIT_IMU_WIRING_M5_UNIT_IMU_WIRING_HPP
#define M5_UNIT_IMU_WIRING_M5_UNIT_IMU_WIRING_HPP
 
#include <M5Unified.h>
#include <M5UnitUnified.h>
 
// HP (high-performance) I2C port count: IDF >= 5.2 splits HP/LP counts (SOC_HP_I2C_NUM); older
// cores (e.g. Arduino core 2.x on IDF 4.4) only define SOC_I2C_NUM, which IS the HP count there.
#if defined(SOC_HP_I2C_NUM)
#define M5_UNIT_IMU_HP_I2C_NUM SOC_HP_I2C_NUM
#else
#define M5_UNIT_IMU_HP_I2C_NUM SOC_I2C_NUM
#endif
 
namespace m5 {
namespace unit {
namespace imu {
namespace wiring {
 
inline bool i2cPortC(m5::unit::UnitUnified& units, m5::unit::Component& u, const bool bus_ready = false)
{
    const int sda = M5.getPin(m5::pin_name_t::port_c_pin2);
    const int scl = M5.getPin(m5::pin_name_t::port_c_pin1);
    if (sda < 0 || scl < 0) {
        return false;  // no Port C on this board (needs the M5GO/Fire base)
    }
#if M5_UNIT_IMU_HP_I2C_NUM >= 2
    static m5::I2C_Class port_c_i2c;
    if (!bus_ready && !port_c_i2c.begin(I2C_NUM_1, sda, scl)) {
        return false;
    }
    return units.add(u, port_c_i2c);
#else
    (void)units;
    (void)bus_ready;
    return false;  // single-HP-I2C SoC: never a classic Core
#endif
}
 
}  // namespace wiring
}  // namespace imu
}  // namespace unit
}  // namespace m5
#endif