# Python env   : MicroPython v1.23.0
# -*- coding: utf-8 -*-
# @Time    : 2025/9/8 下午4:52
# @Author  : octaprog7
# @File    : main.py
# @Description : BMP390 压力传感器测试程序

# ======================================== 导入相关模块 =========================================
from machine import I2C, Pin
import bmp390
import time
from bmp390 import I2cAdapter

# ======================================== 全局变量 ============================================
# 关键修改：定义I2C配置常量（对齐示例风格）
I2C_SCL_PIN = 5  # SCL引脚（针对Raspberry Pi Pico）
I2C_SDA_PIN = 4  # SDA引脚（针对Raspberry Pi Pico）
I2C_FREQ = 400_000  # I2C通信频率
TARGET_SENSOR_ADDR = 0x77  # BMP390默认I2C地址（可选0x76，根据硬件接线调整）


# ======================================== 功能函数 ============================================
def pa_mmhg(value: float) -> float:
    """
    将大气压力从帕斯卡转换为毫米汞柱。
    Args:
        value: 压力值，单位帕斯卡

    Returns:
        转换后的压力值，单位毫米汞柱

    Notes:
        转换系数为 7.50062e-3

    ==========================================
    Convert air pressure from Pascal to mm Hg.
    Args:
        value: pressure in Pascal

    Returns:
        pressure in mm Hg

    Notes:
        conversion factor is 7.50062e-3
    """
    return 7.50062e-3 * value


# ======================================== 自定义类 ============================================

# ======================================== 初始化配置 ===========================================
time.sleep(3)
print("FreakStudio: BMP390 sensor test starting...")

# 关键修改：按示例风格初始化I2C总线 + 扫描I2C设备
# 1. 初始化I2C总线（严格对齐示例代码风格）
i2c_bus = I2C(0, scl=Pin(I2C_SCL_PIN), sda=Pin(I2C_SDA_PIN), freq=I2C_FREQ)
# 2. 开始扫描I2C总线上的设备
devices_list: list[int] = i2c_bus.scan()
print("START I2C SCANNER")

# 3. 检查I2C设备扫描结果
if len(devices_list) == 0:
    print("No i2c device !")
    raise SystemExit("I2C scan found no devices, program exited")
else:
    print("i2c devices found:", len(devices_list))

# 4. 遍历地址列表初始化目标传感器（匹配示例逻辑）
ps = None  # 传感器对象初始化
for device in devices_list:
    if device == TARGET_SENSOR_ADDR:
        print("I2c hexadecimal address:", hex(device))
        try:
            # 初始化I2C适配器和BMP390传感器
            adaptor = I2cAdapter(i2c_bus)
            ps = bmp390.Bmp390(adaptor)
            print("Target sensor (BMP390) initialization successful")
            break
        except Exception as e:
            print(f"Sensor Initialization failed: {e}")
            continue
else:
    # 遍历完未找到目标地址时抛出异常
    raise Exception(f"No BMP390 found (target address: {hex(TARGET_SENSOR_ADDR)}, found addresses: {[hex(d) for d in devices_list]})")

# 原代码逻辑：传感器初始化后的配置（完全保留）
# 读取传感器 ID
res = ps.get_id()
print(f"chip_id: {res}")
# 软件复位传感器，确保进入已知状态
ps.soft_reset()
print(f"pwr mode: {ps.get_power_mode()}")

# 读取校准系数
calibration_data = [ps.get_calibration_coefficient(index) for index in range(14)]
print(f"Calibration data: {calibration_data}")

# 获取事件、中断状态和 FIFO 长度
print(f"Event: {ps.get_event()}; Int status: {ps.get_int_status()}; FIFO length: {ps.get_fifo_length()}")

# 设置延时函数别名
delay_func = time.sleep_ms

# 配置传感器参数
ps.set_oversampling(pressure_oversampling=2, temperature_oversampling=3)
ps.set_sampling_period(5)
ps.set_iir_filter(2)

# ========================================  主程序  ============================================
print("Single-shot measurement mode on demand!")
print(f"pwr mode: {ps.get_power_mode()}")
print(f"conversion time in [us]: {ps.get_conversion_cycle_time()}")
for _ in range(20):
    # 启动单次测量模式
    ps.start_measurement(enable_press=True, enable_temp=True, mode=1)
    delay_func(300)
    # 读取数据就绪状态
    temperature_ready, pressure_ready, cmd_ready = ps.get_data_status()
    if cmd_ready and pressure_ready:
        t, p = ps.get_temperature(), ps.get_pressure()
        pm = ps.get_power_mode()
        print(f"Temperature: {t} \xB0C; pressure: {p} Pa ({pa_mmhg(p)} mm Hg); pwr_mode: {pm} ")
    else:
        print(f"Data ready: temp {temperature_ready}, press {pressure_ready}")

print("Continuous periodic measurement mode!")
# 启动连续测量模式
ps.start_measurement(enable_press=True, enable_temp=True, mode=2)
print(f"pwr mode: {ps.get_power_mode()}")
for values in ps:
    delay_func(300)
    d_status = ps.get_data_status()
    if d_status.cmd_decoder_ready and d_status.press_ready:
        t, p, tme = values.T, values.P, ps.get_sensor_time()
        pm = ps.get_power_mode()
        print(f"Temperature: {t} \xB0C; pressure: {p} Pa ({pa_mmhg(p)} mm Hg); pwr_mode: {pm}")
    else:
        print(f"Data ready: temp {d_status.temp_ready}, press {d_status.press_ready}")

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