'debug.md'
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design_doc/debug.md
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design_doc/debug.md
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1. 问题描述：开机失败，一直遇到Traceback (most recent call last):
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File "/tmp/maixpy_run/main.py", line 525, in <module>
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cmd_str()
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File "/tmp/maixpy_run/main.py", line 102, in cmd_str
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camera_manager.init_camera(640, 480)
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File "/tmp/maixpy_run/camera_manager.py", line 59, in init_camera
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self._camera = camera.Camera(width, height)
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^^^^^^^^^^^^^^^^^^^^^^^^^^^^
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RuntimeError: : Runtime error: mmf vi init failed
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解决方案：
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根据过往经验，极有可能是摄像头的接线有问题。因为在测试环境，摄像头是通过一个24针转22针的线出来的，然后再通过一个接线中继，连接到一个22针
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的fpc线到Maixcam。接线中继如果是24针的，多了两针，需要选好一边然后对连。但这里很容易出错或者松动。可以先用摄像头本身的金色接线直接接到
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Maixcam，然后跑test目录下的test_cammera.py，看看能不能正常启动，如果正常，就确定是中继接线的问题。
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2. 问题描述：202609 批次的拓展版，在连接 202601 批次的电源板，或者不链接电源板的时候，开机后不久，出错，程序退出，日志是：
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[v1.2.10] [INFO] network.py:1078 - [NET] TCP主线程启动
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[v1.2.10] [INFO] network.py:406 - [NET] WiFi不可用或无法连接服务器，使用4G网络
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[v1.2.10] [INFO] network.py:475 - 连接到服务器,使用4G...
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[v1.2.10] [INFO] network.py:527 - [4G-TCP] AT+MIPCLOSE=2 response:
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OK
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+MIPCLOSE: 2
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-- [E] read failed
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Trigger signal, code:SIGSEGV(11)!
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maix multi-media driver released.
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ISP Vipipe(0) Free pa(0x8a52c000) va(0x0x3fbeb5e000)
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program exit failed. exit code: 1.
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解决方案：
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从日志看，就是开始发送登录信息之后就崩溃了。出发了底层的read failed。经过排查，是一定要插上电源板的数据连线，以及电源板要插上电池。这个应该是
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登录时需要读电源电压数据，
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3. 问题描述：202609 批次的拓展版，有一块maixcam的蓝灯常亮，询问maixcam的人，他们觉得应该是卡没有插好。但是拓展版上的激光口挡住了数据卡的出口，
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没法拔出检查，
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解决方案：需要做拓展版的公司（深链鑫创）在做好板子之后，确定系统能正常启动
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4.
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61
test/test_i2c.py
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test/test_i2c.py
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#!/usr/bin/env python3
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# test_i2c_devices.py
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import os
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from maix import i2c
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def list_i2c_devices():
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"""List available I2C device nodes"""
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print("Available I2C devices:")
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# Check /dev directory
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try:
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dev_files = os.listdir("/dev")
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i2c_devices = [f for f in dev_files if "i2c" in f]
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if i2c_devices:
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for dev in sorted(i2c_devices):
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print(f" /dev/{dev}")
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else:
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print(" No /dev/i2c-* devices found!")
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except Exception as e:
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print(f" Error listing /dev: {e}")
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def try_i2c_bus(bus_num):
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"""Try to initialize an I2C bus"""
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try:
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bus = i2c.I2C(bus_num, i2c.Mode.MASTER)
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print(f" I2C bus {bus_num}: OK")
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return True
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except RuntimeError as e:
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print(f" I2C bus {bus_num}: {e}")
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return False
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except Exception as e:
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print(f" I2C bus {bus_num}: Unexpected error: {e}")
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return False
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def main():
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print("=" * 60)
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print("I2C Device Diagnostic")
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print("=" * 60)
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# List kernel devices
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list_i2c_devices()
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# Try common bus numbers
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print("\nTesting I2C buses:")
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working_buses = []
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for bus_num in range(10):
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if try_i2c_bus(bus_num):
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working_buses.append(bus_num)
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print(f"\nWorking buses: {working_buses}")
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if not working_buses:
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print("\nERROR: No I2C buses available!")
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print("Possible causes:")
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print(" 1. I2C kernel driver not loaded")
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print(" 2. Device tree doesn't enable I2C")
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print(" 3. Different kernel version with different device naming")
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if __name__ == "__main__":
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main()
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130
test/test_power.py
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test/test_power.py
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#!/usr/bin/env python3
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# test_power_with_init.py
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from maix import i2c, time
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import sys
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# INA226 register addresses
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INA226_ADDR = 0x40
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REG_CONFIGURATION = 0x00
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REG_BUS_VOLTAGE = 0x02
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REG_CURRENT = 0x04
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REG_CALIBRATION = 0x05
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# Configuration values
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CONFIG_VALUE = 0x4527 # Configuration: 16 averages, 1.1ms conversion time, continuous mode
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CALIBRATION_VALUE = 0x1400 # Calibration value
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def write_register(bus, reg, value):
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"""Write to INA226 register"""
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data = [(value >> 8) & 0xFF, value & 0xFF]
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bus.writeto_mem(INA226_ADDR, reg, bytes(data))
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def read_register(bus, reg):
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"""Read from INA226 register"""
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data = bus.readfrom_mem(INA226_ADDR, reg, 2)
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return (data[0] << 8) | data[1]
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def init_ina226(bus):
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"""Initialize INA226 chip"""
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try:
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# Write configuration register
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write_register(bus, REG_CONFIGURATION, CONFIG_VALUE)
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time.sleep_ms(10)
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# Write calibration register
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write_register(bus, REG_CALIBRATION, CALIBRATION_VALUE)
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time.sleep_ms(10)
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# Verify configuration by reading it back
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config_read = read_register(bus, REG_CONFIGURATION)
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if config_read != CONFIG_VALUE:
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print(f" Warning: Config readback mismatch: 0x{config_read:04X} != 0x{CONFIG_VALUE:04X}")
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return True
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except Exception as e:
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print(f" Init failed: {e}")
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return False
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def read_voltage(bus):
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"""Read bus voltage"""
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raw = read_register(bus, REG_BUS_VOLTAGE)
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voltage = raw * 1.25 / 1000
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return voltage
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def read_current(bus):
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"""Read current"""
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raw = read_register(bus, REG_CURRENT)
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# Handle signed value
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if raw & 0x8000:
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raw = raw - 0x10000
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current_lsb = 0.001 * CALIBRATION_VALUE / 4096
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current = raw * current_lsb * 1000 # mA
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return current
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def test_i2c_bus(bus_num):
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"""Test a single I2C bus with full initialization"""
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print(f"\n{'='*60}")
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print(f"Testing I2C Bus {bus_num}")
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print(f"{'='*60}")
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try:
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# Step 1: Initialize I2C bus
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print(f" 1. Initializing I2C bus...")
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bus = i2c.I2C(bus_num, i2c.Mode.MASTER)
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print(f" OK")
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# Step 2: Initialize INA226
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print(f" 2. Initializing INA226...")
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if not init_ina226(bus):
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print(f" FAILED")
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return False
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print(f" OK")
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# Step 3: Read voltage multiple times
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print(f" 3. Reading voltage...")
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for i in range(5):
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try:
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voltage = read_voltage(bus)
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current = read_current(bus)
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print(f" Read {i+1}: {voltage:.3f}V, {current:.1f}mA")
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time.sleep_ms(100)
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except Exception as e:
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print(f" Read {i+1} failed: {e}")
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print(f" SUCCESS")
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return True
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except Exception as e:
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print(f" FAILED: {e}")
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import traceback
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traceback.print_exc()
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return False
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def main():
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"""Test all I2C buses"""
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print("INA226 Test with Proper Initialization")
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print("=" * 60)
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# Test buses in order of likelihood
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test_order = [5, 1, 3, 4, 0, 2]
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success_buses = []
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for bus_num in test_order:
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if test_i2c_bus(bus_num):
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success_buses.append(bus_num)
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# If we found a working bus, stop testing others
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break
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print(f"\n{'='*60}")
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print(f"Summary:")
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print(f" Working buses: {success_buses}")
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if not success_buses:
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print(f" ERROR: No working I2C bus found!")
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return 1
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return 0
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if __name__ == "__main__":
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sys.exit(main())
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