用STM32进行交流电流电压的测量监控_bl0942 stm32

作者：繁依Fanyi0 | 2024-03-16 13:37:40

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bl0942 stm32

本文介绍通过STM32和BL0942进行交流电流的测量和监控
能脉冲。
本文介绍如何通过STM32 以串口模式对BL0942进行配置读取，同时通过CF1监控过流，不多废话，直接上代码
**

1.宏定义


#define Addr_I_WAVE			0x01		 //电流通道波形			*
#define Addr_V_WAVE			0x02		//电压通道波形*
#define Addr_I_RMS			0x03		//电流有效值
#define Addr_V_RMS			0x04		//电压有效值
#define Addr_I_FAST_RMS		0x05		//电流快速有效值*
#define Addr_WATT			0x06		//有功功率
#define Addr_CF_CNT			0x07		//有功电能脉冲计数
#define	Addr_FREQ			0x08		//工频频率
#define Addr_STATUS			0x09		//状态
#define Addr_VERSION		0x0F		//版本
//用户操作寄存器
#define Addr_I_CHOS			0x11		//电流通道直流偏置校正
#define Addr_I_RMSOS		0x12		//电流通道有效值小信号校正
#define Addr_WA_CREEP		0x14		//有功功率防潜阈值
#define Addr_FAST_RMS_TH	0x15		//
#define Addr_FAST_RMS_CYC	0x16
#define Addr_FREQ_CYC		0x17
#define Addr_MASK			0x18
#define Addr_MODE			0x19
#define Addr_GAIN_CR		0x1A
#define Addr_SOFT_RESET		0x1C		//软复位
#define Addr_WRPROT			0x1D		//用户写保护设置

//注意 BL0940的读命令字节固定为0x58+ICAddr，写命令字节固定为0xA8+ICAddr；SOP10封装芯片的IC_Addr地址固定为0
//     BL0942 TSSOP14封装带地址选择管脚，需根据A1~A2地址选择管脚的电平配置命令字节，可以进行多机并联通信     
#define BL0942_Addr_R           0x58
#define BL0942_Addr_w           0xA8

//出厂校准芯片，增益控制1%以内，外围器件精度控制1%以内，采用同一系数，不用 EEPROM保存参数
// 电流采用1毫欧电阻采样，电压采用390K*5+0.51K进行分压，实际测试发现电阻存在偏差，进行微调
//BL0942评估版，立创直接贴片合金电阻(台湾厚声MS121WF100NT4E  )，实际测量比1毫欧偏小，约0.93毫欧					

#define Power_K			5798;//580;//		// 3537*1毫欧*0.51K*1000/(1.218*1.218)/(390K*5+0.51K)	功率转换系数
#define Current_K		23362;//233628;//23362	        // 305978*1毫欧/1.218																					电流转换系数
#define Voltage_K		15883; 		// 73989*0.51K*1000/1.218/(390K*5+0.51K)										电压转换系数		
#define Energy_K		4976;		// 3600000*Power_K/16384/256  电能转换系数，电能脉冲计数，对应于1度电的脉冲计数

//采用美隆0.001毫欧贴片合金电阻，实际比1毫欧偏大，约1.023毫欧
/*
#define Power_K			6378;	//	功率转换系数
#define Current_K		25699;	//	电流转换系数
#define Voltage_K		15883; 	//	电压转换系数		
#define Energy_K		5474;   //	
*/
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2.寄存器读写驱动

/**
  * @brief Read Bl0942 register.
  * @note  the reslt will be stored in BL0942_Elect,the converted I/V Parameter will be stored in BL0942_Elect
  * @param ICAddr       Uart address of BL0942 .
  * @param Reg          Target register to read data from.
  * @param Timeout      Timeout duration.
  * @retval Flag_BL0942_R
  */
uint8_t BL0942_Uart1_R(uint8_t ICAddr,uint8_t Reg,uint32_t Timeout)
{
  uint8_t tmp_2,aTxBuffer[2] = {0},aRxBuffer[4] = {0};
  FourBytes_Type  tmp_D;
  tmp_2=huart1.Instance->RDR;//???  
  aTxBuffer[0]= ICAddr;
  aTxBuffer[1]= Reg;
  if(HAL_UART_Transmit(&huart1, (uint8_t*)aTxBuffer, 2, Timeout)!= HAL_OK)
  {
    Error_Handler(); 
  }
  if(HAL_UART_Receive(&huart1, (uint8_t *)aRxBuffer, 4, Timeout) != HAL_OK)
  {
    Error_Handler();  
  }
  tmp_D.uByte[0]=aRxBuffer[0];
  tmp_D.uByte[1]=aRxBuffer[1];
  tmp_D.uByte[2]=aRxBuffer[2];
  tmp_2 = aTxBuffer[0] + aTxBuffer[1] + aRxBuffer[0] + aRxBuffer[1] + aRxBuffer[2];
  tmp_2=~tmp_2;		//计算的校验和字节 
  if (aRxBuffer[3]==tmp_2)
  {
    Flag_BL0942_R = 1;
    switch (Reg)
    {
      case Addr_I_RMS:
           tmp_D.uLongs=tmp_D.uLongs*100/Current_K;
           BL0942_Elect.Current_Value=tmp_D.uLongs;
      break;              
      case Addr_V_RMS:	
           tmp_D.uLongs=tmp_D.uLongs*100/Voltage_K;
           BL0942_Elect.Voltage_Value=tmp_D.uLongs;                
      break;
      case Addr_WATT:	
           tmp_D.uLongs=tmp_D.uLongs*100/Power_K;
           BL0942_Elect.Power_Value=tmp_D.uLongs;
      break;  
      case Addr_FREQ:	
           tmp_D.uLongs=100000000/tmp_D.uLongs;		//转换为实际频率
           BL0942_Elect.Freq=tmp_D.uLongs;
      break;   
      case Addr_I_FAST_RMS:	                        //I_FAST_RMS
           tmp_D.uLongs=tmp_D.uLongs*100/Current_K;
           BL0942_Elect.F_Current_Value=tmp_D.uLongs;
      break;  
      case Addr_CF_CNT:	                                //电能脉冲计数	
           if (tmp_D.uLongs>=BL0942_Elect.Fir_CF_CNT)		
           {
             BL0942_Elect.Mid_CF_CNT+=(tmp_D.uLongs-BL0942_Elect.Fir_CF_CNT);
           }
           else		//电能脉冲计数累积满出现溢出情况
           {
             BL0942_Elect.Mid_CF_CNT+=(tmp_D.uLongs+(0xFFFFFF-BL0942_Elect.Fir_CF_CNT));
           }
           BL0942_Elect.Fir_CF_CNT=tmp_D.uLongs;
           //判断是否累积超过1度电的脉冲数,需要确保读取时间间隔内的电量不超过1度电，否则用整除
           tmp_D.uLongs=Energy_K;
           if (BL0942_Elect.Mid_CF_CNT>=tmp_D.uLongs)
           {
             BL0942_Elect.Energy_kwh++;
             BL0942_Elect.Mid_CF_CNT-=Energy_K;
           }
      break;                
      case Addr_WA_CREEP:
           if( tmp_D.uByte[0] == 11)
            {
              //communication success between WB55 and BL0942
            }
            else
            {
              //communication fail between WB55 and BL0942
            }
      break;
      case Addr_MASK:
           BL0942_Uart_Buffer[2] = tmp_D.uByte[0] |0x01;
      break;
      case Addr_MODE:
           BL0942_Uart_Buffer[2] = tmp_D.uByte[0];
           BL0942_Uart_Buffer[3] = tmp_D.uByte[1] | 0x03;                 
      break;              
      case Addr_FAST_RMS_TH:              
      break;              
      default:
      break;
    }                    		
  }
  else
  {
    Flag_BL0942_R = 0;
  }
  return Flag_BL0942_R;
}

/**
  * @brief Write  Bl0942 user configuraetion register.
  * @note  
  * @param PData[0]             Uart address of BL0942 .
  * @param PData[1]             Target register to be written.
  * @param PData[2...4]         the config data.
  * @param PData[5]             CHSUM.
  * @param Timeout              Timeout duration.
  * @retval 
  */

void BL0942_Uart1_W(uint8_t *pData,uint32_t Timeout)
{
  //send ICAddr & Reg address
  if(HAL_UART_Transmit(&huart1, (uint8_t*)pData, 6, Timeout)!= HAL_OK)
  {
    Error_Handler(); 
  }  
}

void USART1_BaudRate_Reconfig(uint32_t baud)
{
  huart1.Instance = USART1;
  huart1.Init.BaudRate = baud;
  huart1.Init.WordLength = UART_WORDLENGTH_8B;
  huart1.Init.StopBits = UART_STOPBITS_1;
  huart1.Init.Parity = UART_PARITY_NONE;
  huart1.Init.Mode = UART_MODE_TX_RX;
  huart1.Init.HwFlowCtl = UART_HWCONTROL_NONE;
  huart1.Init.OverSampling = UART_OVERSAMPLING_8;
  huart1.Init.OneBitSampling = UART_ONE_BIT_SAMPLE_DISABLE;
  huart1.Init.ClockPrescaler = UART_PRESCALER_DIV1;
  huart1.AdvancedInit.AdvFeatureInit = UART_ADVFEATURE_NO_INIT;
  if (HAL_UART_Init(&huart1) != HAL_OK)
  {
    Error_Handler();
  }
}

}
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3.调用驱动进行串口波特率、过流阀值、CF1功能配置

/enable Reg modification
    BL0942_Uart_Buffer[1] = Addr_WRPROT;
    BL0942_Uart_Buffer[2] = 0x55;
    BL0942_Uart_Buffer[3] = 0x00;
    BL0942_Uart_Buffer[4] = 0x00;
    BL0942_Uart_Buffer[5] = ~( BL0942_Uart_Buffer[0] + BL0942_Uart_Buffer[1] + BL0942_Uart_Buffer[2] + BL0942_Uart_Buffer[3] + BL0942_Uart_Buffer[4]);
    BL0942_Uart1_W((uint8_t*)BL0942_Uart_Buffer,TIMEOUT); 
    //modify the Baudrate to 38400
    BL0942_Uart1_R(BL0942_Addr_R,Addr_MODE,TIMEOUT); //read the Mode_Reg
    BL0942_Uart_Buffer[1] = Addr_MODE;
    BL0942_Uart_Buffer[4] = 0x00;
    BL0942_Uart_Buffer[5] = ~( BL0942_Uart_Buffer[0] + BL0942_Uart_Buffer[1] + BL0942_Uart_Buffer[2] + BL0942_Uart_Buffer[3] + BL0942_Uart_Buffer[4]);
    BL0942_Uart1_W((uint8_t*)BL0942_Uart_Buffer,TIMEOUT);
    HAL_Delay(1);
    USART1_BaudRate_Reconfig(38400); //set the MCU USART1 BAUDRATE to 38400
    //modify the target reg  
    BL0942_Uart_Buffer[1] = Addr_FAST_RMS_TH;
    BL0942_Uart_Buffer[2] = 0x21;
    BL0942_Uart_Buffer[3] = 0x02;
    BL0942_Uart_Buffer[4] = 0x00;
    BL0942_Uart_Buffer[5] = ~( BL0942_Uart_Buffer[0] + BL0942_Uart_Buffer[1] + BL0942_Uart_Buffer[2] + BL0942_Uart_Buffer[3] + BL0942_Uart_Buffer[4]);
    BL0942_Uart1_W((uint8_t*)BL0942_Uart_Buffer,TIMEOUT); //set the overcurrent point: 0x221:1.5A
    BL0942_Uart1_R(BL0942_Addr_R,Addr_MASK,TIMEOUT);  //Read the OT_FUNX_Reg 
    BL0942_Uart_Buffer[1] = Addr_MASK;  
    BL0942_Uart_Buffer[3] = 0x00;
    BL0942_Uart_Buffer[4] = 0x00;
    BL0942_Uart_Buffer[5] = ~( BL0942_Uart_Buffer[0] + BL0942_Uart_Buffer[1] + BL0942_Uart_Buffer[2] + BL0942_Uart_Buffer[3] + BL0942_Uart_Buffer[4]);
    BL0942_Uart1_W((uint8_t*)BL0942_Uart_Buffer,TIMEOUT); //set the CF1 out to overcurrent indicator
    //lock 
    BL0942_Uart_Buffer[1] = Addr_WRPROT;
    BL0942_Uart_Buffer[2] = 0x00;
    BL0942_Uart_Buffer[3] = 0x00;
    BL0942_Uart_Buffer[4] = 0x00;
    BL0942_Uart_Buffer[5] = ~( BL0942_Uart_Buffer[0] + BL0942_Uart_Buffer[1] + BL0942_Uart_Buffer[2] + BL0942_Uart_Buffer[3] + BL0942_Uart_Buffer[4]);
    BL0942_Uart1_W((uint8_t*)BL0942_Uart_Buffer,TIMEOUT); 
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4.读取电流有效值及验证寄存器配置值，

    BL0942_Uart1_R(BL0942_Addr_R,Addr_FAST_RMS_TH,TIMEOUT); 
    BL0942_Uart1_R(BL0942_Addr_R,Addr_MASK,TIMEOUT);
    BL0942_Uart1_R(BL0942_Addr_R,Addr_I_RMS,TIMEOUT);
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**注意：
        1. BL0942自身不带保存功能，每次上电都要重新配置
        2. 串口波特率4800 和9600是通过外部条线的方式配置，19200 和38400则需要统通MODE寄存器进行配置**
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