BQ769x0 的库问题

Question

我正在对 BMS 进行逆向工程。我已经关闭了所有硬件连接。它有一个 stm32f103c8 和带有 CRC 的 bq7693003。该芯片有 2 个库，但都不起作用！这是 BMS 的图片。这是 BMS 的模型。我正在使用 github 存储库中的示例代码。我正在使用的库称为：10s_Ti_BQ76930_BMS

将其中一个 GPIO 作为 BQ7693003 的启动引脚后，它会启动并在串行控制台中显示以下内容：

8
0x08
Starting BMS object
Starting wire.begin
starting variable initialization
Starting boot pin check
Determining i2c address and whether CRC is enabled
Address and CRC detection successful
Address:  8
CRC Enabled:  1

它被卡在那里。

在

bq769x0.cpp

中，我取消注释了 BootPin 代码以自动启动我的 bq7693003。在它没有打开之前。但现在它确实如此，并且如上所述陷入困境。

  // Boot IC if pin is defined (else: manual boot via push button has to be 
  // done before calling this method)
  Serial.println("Starting boot pin check");
  if (bootPin >= 0)
  {
    pinMode(bootPin, OUTPUT);
    digitalWrite(bootPin, HIGH);
    delay(5);   // wait 5 ms for device to receive boot signal (datasheet: max. 2 ms)
    //pinMode(bootPin, INPUT);     // don't disturb temperature measurement
    delay(1000);  // wait for device to boot up completely (datasheet: max. 10 ms)
  }

还有另一个问题，因此无法编译：

      // check for overrun of millis() or very slow running program
      if (abs(secSinceInterrupt - secSinceErrorCounter) > 2) {
        secSinceErrorCounter = secSinceInterrupt;
      }

我想我通过使用

fabs

而不是

abs

解决了这个问题。

我在代码中添加了各种延迟，但它仍然无法正常工作。

我真的不知道该怎么做，因为我不知道如何为 I2C 和这个芯片编写代码。另外，我尝试过 LibreSolar 库，它可以很好地清除各种错误，例如 XR、Alert、UV、OV .. 等，但在清除 XR 错误后会卡住。

问候

Answer 1

因此，在从头开始部分重写整个库后，我意识到原作者有一些错误或我不确定的东西......如果有人知道请分享，以便此修复背后有一个原因。

首先我在

byte bq769x0::updateBalancingSwitches(void)

中将

void bq769x0::updateBalancingSwitches(void)

更改为

bq769x0.cpp

然后我在

byte updateBalancingSwitches(void);

中将

void updateBalancingSwitches(void);

更改为

bq769x0.h

最后我改变了这部分代码：

if (determineAddressAndCrc())
    {
        //debug prints to show that initial comms were successful
        Serial.println("Address and CRC detection successful");
        Serial.print("Address:  ");
        Serial.println(I2CAddress, HEX);
        Serial.print("CRC Enabled:  ");
        Serial.println(crcEnabled);
        

        // initial settings for bq769x0
        writeRegister(SYS_CTRL1, 0b00010000);  // Turn ADC on and use internal die temp
        writeRegister(SYS_CTRL2, 0b01000000);  // switch CC_EN on

            // attach ALERT interrupt to this instance
    instancePointer = this;  //taken from arduino compatible code
    attachInterrupt(digitalPinToInterrupt(alertPin), bq769x0::alertISR, RISING); //taken from arduino compatible code
        
        // get ADC offset and gain
        adcOffset = (signed int) readRegister(ADCOFFSET);  // convert from 2's complement
        adcGain = 365 + (((readRegister(ADCGAIN1) & 0b00001100) << 1) |
            ((readRegister(ADCGAIN2) & 0b11100000) >> 5)); // uV/LSB
    }
    else {
        // TODO: do something else... e.g. set error flag
#if BQ769X0_DEBUG
        Serial.println("BMS communication error\n");
#endif
    }



/*  // From original arduino startup code
  if (readRegister(CC_CFG) == 0x19)
  {
      Serial.println("Inside readregister for cc_cfg if");
    // initial settings for bq769x0
    writeRegister(SYS_CTRL1, B00011000);  // switch external thermistor and ADC on
    writeRegister(SYS_CTRL2, B01000000);  // switch CC_EN on

    // attach ALERT interrupt to this instance
    instancePointer = this;
    attachInterrupt(digitalPinToInterrupt(alertPin), bq769x0::alertISR, RISING);

    // get ADC offset and gain
    adcOffset = (signed int) readRegister(ADCOFFSET);  // convert from 2's complement
    adcGain = 365 + (((readRegister(ADCGAIN1) & B00001100) << 1) | 
      ((readRegister(ADCGAIN2) & B11100000) >> 5)); // uV/LSB
    
    return 0;
  }

bq769x0.cpp 文件中的这一点：

 if (determineAddressAndCrc())
    {
        //debug prints to show that initial comms were successful
        Serial.println("Address and CRC detection successful");
        Serial.print("Address:  ");
        Serial.println(I2CAddress, HEX);
        Serial.print("CRC Enabled:  ");
        Serial.println(crcEnabled);
    }



  // From original arduino startup code
  if (readRegister(CC_CFG) == 0x19)
  {
      Serial.println("Inside readregister for cc_cfg if");
    // initial settings for bq769x0
    writeRegister(SYS_CTRL1, B00011000);  // switch external thermistor and ADC on
    writeRegister(SYS_CTRL2, B01000000);  // switch CC_EN on

    // attach ALERT interrupt to this instance
    instancePointer = this;
    attachInterrupt(digitalPinToInterrupt(alertPin), bq769x0::alertISR, RISING);

    // get ADC offset and gain
    adcOffset = (signed int) readRegister(ADCOFFSET);  // convert from 2's complement
    adcGain = 365 + (((readRegister(ADCGAIN1) & B00001100) << 1) | 
      ((readRegister(ADCGAIN2) & B11100000) >> 5)); // uV/LSB
    
    return 0;
  }