ESP32 偶尔与多个 I2C 设备崩溃，堆问题？

Posted 2023-02-19

【中文标题】ESP32 偶尔与多个 I2C 设备崩溃，堆问题？

【英文标题】：ESP32 sporadically crashing with multiple I2C devices, heap issue?

【发布时间】：2021-09-06 09:56:34

【问题描述】：

我有一个 ESP32（M5Stack Core Grey），它通过 I2C 连接到 PMIC（带有 I2C 寄存器的自定义 IP5306）和加速度计 (MPU9250)。两个库大部分时间同时独立工作。有时，我会遇到 2 个错误之一，我怀疑这是我的代码尝试调用这两个设备时的某种冲突：

assertion "head != NULL" failed: file "/home/runner/work/esp32-arduino-lib-builder/esp32-arduino-lib-builder/esp-idf/components/heap/multi_heap_poisoning.c", line 245, function: multi_heap_realloc
Decoding stack results
0x4008d774: invoke_abort at /home/runner/work/esp32-arduino-lib-builder/esp32-arduino-lib-builder/esp-idf/components/esp32/panic.c line 155
0x4008d9a5: abort at /home/runner/work/esp32-arduino-lib-builder/esp32-arduino-lib-builder/esp-idf/components/esp32/panic.c line 170
0x400ec7ef: __assert_func at ../../../.././newlib/libc/stdlib/assert.c line 63
0x4008d401: multi_heap_free at /home/runner/work/esp32-arduino-lib-builder/esp32-arduino-lib-builder/esp-idf/components/heap/multi_heap_poisoning.c line 214
0x40085456: heap_caps_free at /home/runner/work/esp32-arduino-lib-builder/esp32-arduino-lib-builder/esp-idf/components/heap/heap_caps.c line 268
0x40085c2d: _free_r at /home/runner/work/esp32-arduino-lib-builder/esp32-arduino-lib-builder/esp-idf/components/newlib/syscalls.c line 42
0x400e24fb: i2cFlush at C:\users\quan\.platformio\packages\framework-arduinoespressif32\cores\esp32\esp32-hal-i2c.c line 1604
0x400e2e0c: i2cRead at C:\users\quan\.platformio\packages\framework-arduinoespressif32\cores\esp32\esp32-hal-i2c.c line 1649
0x400dc025: TwoWire::readTransmission(unsigned short, unsigned char*, unsigned short, bool, unsigned int*) at C:\users\quan\.platformio\packages\framework-arduinoespressif32\libraries\Wire\src\Wire.cpp line 139
0x400dc0d9: TwoWire::requestFrom(unsigned short, unsigned char, bool) at C:\users\quan\.platformio\packages\framework-arduinoespressif32\libraries\Wire\src\Wire.cpp line 193
0x400dc155: TwoWire::requestFrom(int, int) at C:\users\quan\.platformio\packages\framework-arduinoespressif32\libraries\Wire\src\Wire.cpp line 296
0x400dafcc: getBatteryGauge() at src\myPower.cpp line 16
0x400daff8: powerLoop(void*) at src\myPower.cpp line 37
0x40089eb1: vPortTaskWrapper at /home/runner/work/esp32-arduino-lib-builder/esp32-arduino-lib-builder/esp-idf/components/freertos/port.c line 143

然后有时我会得到以下信息：

assertion "head != NULL" failed: file "/home/runner/work/esp32-arduino-lib-builder/esp32-arduino-lib-builder/esp-idf/components/heap/multi_heap_poisoning.c", line 245, function: multi_heap_realloc
Decoding stack results
0x4008d774: invoke_abort at /home/runner/work/esp32-arduino-lib-builder/esp32-arduino-lib-builder/esp-idf/components/esp32/panic.c line 155
0x4008d9a5: abort at /home/runner/work/esp32-arduino-lib-builder/esp32-arduino-lib-builder/esp-idf/components/esp32/panic.c line 170
0x400ec7eb: __assert_func at ../../../.././newlib/libc/stdlib/assert.c line 59
0x4008d459: multi_heap_realloc at /home/runner/work/esp32-arduino-lib-builder/esp32-arduino-lib-builder/esp-idf/components/heap/multi_heap_poisoning.c line 245
0x400854c6: heap_caps_realloc at /home/runner/work/esp32-arduino-lib-builder/esp32-arduino-lib-builder/esp-idf/components/heap/heap_caps.c line 297
0x4008552a: heap_caps_realloc_default at /home/runner/work/esp32-arduino-lib-builder/esp32-arduino-lib-builder/esp-idf/components/heap/heap_caps.c line 163
0x40085c3d: _realloc_r at /home/runner/work/esp32-arduino-lib-builder/esp32-arduino-lib-builder/esp-idf/components/newlib/syscalls.c line 47
0x400e22ca: i2cAddQueue at C:\users\quan\.platformio\packages\framework-arduinoespressif32\cores\esp32\esp32-hal-i2c.c line 1057
0x400e234f: i2cAddQueueWrite at C:\users\quan\.platformio\packages\framework-arduinoespressif32\cores\esp32\esp32-hal-i2c.c line 1081
0x400e2d4c: i2cWrite at C:\users\quan\.platformio\packages\framework-arduinoespressif32\cores\esp32\esp32-hal-i2c.c line 1617
0x400dc001: TwoWire::writeTransmission(unsigned short, unsigned char*, unsigned short, bool) at C:\users\quan\.platformio\packages\framework-arduinoespressif32\libraries\Wire\src\Wire.cpp line 133
0x400dc055: TwoWire::endTransmission(bool) at C:\users\quan\.platformio\packages\framework-arduinoespressif32\libraries\Wire\src\Wire.cpp line 158
0x400dc558: CommUtil::readByte(unsigned char, unsigned char, unsigned char*) at C:\users\quan\.platformio\lib\M5Stack_ID1851\src\utility\CommUtil.cpp line 98
0x400dfcf6: MPU9250::readByte(unsigned char, unsigned char) at C:\users\quan\.platformio\lib\M5Stack_ID1851\src\utility\MPU9250.cpp line 438
0x400d1bce: readIMU(void*) at src\accelerometer.cpp line 75
0x40089eb1: vPortTaskWrapper at /home/runner/work/esp32-arduino-lib-builder/esp32-arduino-lib-builder/esp-idf/components/freertos/port.c line 143

这两个错误看起来很相似，但它们是从不同的地方调用的。我已将 PMIC 和 IMU 读取放在单独的 FreeRTOS 任务中。我是否需要确保在每次 I2C 读取之前获取信号量并在完成后将其返回？我已经把它放在我明确读取值的代码中，但可能遗漏了一些地方。大多数 M5Stack 代码一次只演示一个模块，因此当您组合多个传感器时，我不确定最佳实践。非常感谢任何指导。

【问题讨论】：

这是代码中某处缓冲区溢出的症状。如果您使用的是 RTOS，最好使用信号量。该错误似乎来自传感器读取缓冲区溢出。

【参考方案1】：

您需要使用互斥锁从不同的任务访问硬件。

  //GLOBAL
  SemaphoreHandle_t xI2CSemaphore;            //Shared I2C Resource Mutex
  
  //PROGRAM SETUP
  if ( xI2CSemaphore == NULL )
  
    xI2CSemaphore = xSemaphoreCreateMutex();
    if ( ( xI2CSemaphore ) != NULL )
      xSemaphoreGive( ( xI2CSemaphore ) );
  



 //WHEN USING IN A TASK...
 if ( xSemaphoreTake( xI2CSemaphore, ( TickType_t ) 250 ) == pdTRUE )
 

 xSemaphoreGive( xI2CSemaphore ); // Now free or "Give" the Serial Port for others.