bma423_driver/
├── code/
│   ├── bma423.py         # 核心驱动文件
│   ├── bma423conf.bin    # Bosch 特征引擎二进制配置文件
│   └── main.py           # 测试示例代码
├── package.json          # 包描述文件
├── LICENSE               # MIT 许可证
└── README.md             # 本说明文档

import time
from machine import I2C, Pin
from bma423 import BMA423

I2C_SCL_PIN = 22
I2C_SDA_PIN = 21
I2C_FREQ = 400000
I2C_BUS_ID = 0

device = None

time.sleep(3)
print("FreakStudio: Using BMA423 accelerometer driver ...")

i2c = I2C(I2C_BUS_ID, scl=Pin(I2C_SCL_PIN), sda=Pin(I2C_SDA_PIN), freq=I2C_FREQ)

devices = i2c.scan()
if not devices:
    raise RuntimeError("No I2C device found on bus")
print("I2C devices found: %s" % [hex(d) for d in devices])

device = BMA423(i2c, acc_range=4, debug=False)

try:
    device.load_features_config()
    device.enable_features_detection("step-count")
    print("Feature engine: step counting enabled")
except (OSError, RuntimeError) as e:
    print("Feature engine load failed: %s" % str(e))
    print("Basic acceleration reading still available")

try:
    while True:
        accel = device.get_xyz()
        temp = device.get_temperature()
        steps = device.get_steps()
        print(
            "accel(x,y,z)=(%.3f, %.3f, %.3f)g temp=%.1fC steps=%d" %
            (accel[0], accel[1], accel[2], temp if temp is not None else -999.0, steps)
        )
        time.sleep_ms(500)

except KeyboardInterrupt:
    print("Program interrupted by user")
except OSError as e:
    print("Hardware communication error: %s" % str(e))
except Exception as e:
    print("Unknown error: %s" % str(e))
finally:
    print("Cleaning up resources...")
    if device is not None:
        device.deinit()
    device = None
    print("Program exited")