目录

1、硬件设计

2、软件设计

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1、硬件设计

HLW8110是一款高精度的电能计量 IC,它采用 CMOS 制造工艺，主要用于单相计量应用。它能够测量线电压和电流，并能计算有功功率，视在功率和功率因素。该器件内部集成了二个∑-Δ型 ADC 和一个高精度的电能计量内核。输入通道支持灵活的 PGA 设置，因此 HLW8110 适合与不同类型的传感器使用，如电流互感器（CT）和低阻值分流器。

项目资源下载请参见：https://download.csdn.net/download/m0_38106923/87775438

HLW8110 电能计量 IC 采用 3.3V 或 5.0V 电源供电，内置 3.579M 振荡器，可以通过 UART 口进行数据通讯，波特率为 9600bps。

HLW8110的典型电路，外围电路简单，外围器件非常少，单路通道可用于检测负载设备的功率、电压、电流和用电量，通过 UART 或接口传输数据至 MCU，HLW8110 内部可以设置功率过载、电压过载和电流过载阀值，通过内部寄存器可以查询，并可以检测电压过零点。

官方测试，使用采样电阻或者互感器的理论数据误差如下所示：

在使用之前先简单设计一块Demo板进行调测，实物模块如下所示：

原理图、PCB如下所示：

2、软件设计

由于代码量较多，部分配置代码不再赘述，仅仅展示核心算法代码。

读取通道电流，实现代码如下所示：

void Read_HLW8110_IA(void)
{	float a;Uart_Read_HLW8110_Reg(REG_RMSIA_ADDR,3);delay_ms(10);if ( u8_RxBuf[u8_RX_Length-1] == HLW8110_checkSum_Read(u8_RX_Length) ){U32_RMSIA_RegData = (unsigned long)(u8_RxBuf[0]<<16) + (unsigned long)(u8_RxBuf[1]<<8) + (unsigned long)(u8_RxBuf[2]); printf("A通道电流寄存器:%lx\n " ,U32_RMSIA_RegData);}else{printf("A通道电流寄存器读取出错\r\n");B_Read_Error = 1;}//A通道电流PGA = 16,电压通道PGA = 1;电流采样电阻1mR,电压采样电阻1M//计算公式,U16_AC_I = (U32_RMSIA_RegData * U16_RMSIAC_RegData)/(电流系数* 2^23）if ((U32_RMSIA_RegData & 0x800000) == 0x800000){F_AC_I = 0;}else{a = (float)U32_RMSIA_RegData;a = a * U16_RMSIAC_RegData;a  = a/0x800000;                     //电流计算出来的浮点数单位是mA,比如5003.12 a = a/1;  								// 1 = 电流系数a = a/1000;              //a= 5003ma,a/1000 = 5.003A,单位转换成Aa = a * D_CAL_A_I;				//D_CAL_A_I是校正系数，默认是1F_AC_I = a;}
}

读取通道电压，实现代码如下所示：

void Read_HLW8110_U(void)
{float a;Uart_Read_HLW8110_Reg(REG_RMSU_ADDR,3);delay_ms(10);if ( u8_RxBuf[u8_RX_Length-1] == HLW8110_checkSum_Read(u8_RX_Length) ){U32_RMSU_RegData = (unsigned long)(u8_RxBuf[0]<<16) + (unsigned long)(u8_RxBuf[1]<<8) + (unsigned long)(u8_RxBuf[2]);printf("电压通道寄存器:%lx\n " ,U32_RMSU_RegData);}else{printf("电压通道寄存器读取出错\r\n");B_Read_Error = 1;}//电压//计算:U16_AC_V = (U32_RMSU_RegData * U16_RMSUC_RegData)/2^23if ((U32_RMSU_RegData &0x800000) == 0x800000){F_AC_V = 0;}else{a =  (float)U32_RMSU_RegData;a = a*U16_RMSUC_RegData;  a = a/0x400000;       a = a/1;  						// 1 = 电压系数a = a/100;    				//计算出a = 22083.12mV,a/100表示220.8312V，电压转换成Va = a*D_CAL_U;				//D_CAL_U是校正系数，默认是1,		F_AC_V = a;}
}

读取通道功率，实现代码如下所示：

void Read_HLW8110_PA(void)
{float a;float b;Uart_Read_HLW8110_Reg(REG_POWER_PA_ADDR,4);delay_ms(10);if ( u8_RxBuf[u8_RX_Length-1] == HLW8110_checkSum_Read(u8_RX_Length) ){U32_POWERPA_RegData = (unsigned long)(u8_RxBuf[0]<<24) + (unsigned long)(u8_RxBuf[1]<<16) + (unsigned long)(u8_RxBuf[2]<<8) + (unsigned long)(u8_RxBuf[3]);printf("A通道功率寄存器:%lx\n " ,U32_POWERPA_RegData);}else{printf("A通道功率寄存器读取出错\r\n");B_Read_Error = 1;}if (U32_POWERPA_RegData > 0x80000000){b = ~U32_POWERPA_RegData;a = (float)b;}elsea =  (float)U32_POWERPA_RegData;//功率需要分正功和负功//计算,U16_AC_P = (U32_POWERPA_RegData * U16_PowerPAC_RegData)/(2^31*电压系数*电流系数)//单位为W,比如算出来5000.123，表示5000.123Wa = a*U16_PowerPAC_RegData;a = a/0x80000000;             a = a/1;  										// 1 = 电流系数a = a/1;  										// 1 = 电压系数a = a * D_CAL_A_P;						//D_CAL_A_P是校正系数，默认是1F_AC_P = a;									//单位为W,比如算出来5000.123，表示5000.123W
}

读取通道有功电量，实现代码如下所示：

void Read_HLW8110_EA(void)
{float a;Uart_Read_HLW8110_Reg(REG_ENERGY_PA_ADDR,3); delay_ms(10);if ( u8_RxBuf[u8_RX_Length-1] == HLW8110_checkSum_Read(u8_RX_Length) ){U32_ENERGY_PA_RegData = (unsigned long)(u8_RxBuf[0]<<16) + (unsigned long)(u8_RxBuf[1]<<8) + (unsigned long)(u8_RxBuf[2]);printf("A通道有功电量寄存器:%lx\n " ,U32_ENERGY_PA_RegData);}else{printf("A通道有功电量寄存器读取出错\r\n");B_Read_Error = 1;}Uart_Read_HLW8110_Reg(REG_HFCONST_ADDR,2); delay_ms(10);if ( u8_RxBuf[u8_RX_Length-1] == HLW8110_checkSum_Read(u8_RX_Length) ){U16_HFConst_RegData = (unsigned int)(u8_RxBuf[0]<<8) + (unsigned int)(u8_RxBuf[1]);printf("HFCONST常数 = :%d\n " ,U16_HFConst_RegData);}else{printf("HFCONST常数寄存器读取出错\r\n");B_Read_Error = 1;}//电量计算,电量 = (U32_ENERGY_PA_RegData * U16_EnergyAC_RegData * HFCONST) /(K1*K2 * 2^29 * 4096)//HFCONST:默认值是0x1000, HFCONST/(2^29 * 4096) = 0x20000000a =  (float)U32_ENERGY_PA_RegData;	a = a*U16_EnergyAC_RegData;a = a/0x20000000;             //电量单位是0.001KWH,比如算出来是2.002,表示2.002KWH    a = a/1;  										// 1 = 电流系数a = a/1;  										// 1 = 电压系数a = a * D_CAL_A_E;     			//D_CAL_A_E是校正系数，默认是1F_AC_E = a;F_AC_BACKUP_E = F_AC_E;	
}

读取通道的线性频率，实现代码如下所示：

void Read_HLW8110_LineFreq(void)
{float a;unsigned long b;Uart_Read_HLW8110_Reg(REG_UFREQ_ADDR,2);delay_ms(10);if ( u8_RxBuf[u8_RX_Length-1] == HLW8110_checkSum_Read(u8_RX_Length) ){b = (unsigned long)(u8_RxBuf[0]<<8) + (unsigned long)(u8_RxBuf[1]);printf("A通道线性频率寄存器:%ld\n " ,b);}else{printf("A通道线性频率寄存器读取出错\r\n");B_Read_Error = 1;}a = (float)b;a = 3579545/(8*a);    F_AC_LINE_Freq = a;
}

读取通道功率因素，实现代码如下所示：

void Read_HLW8110_PF(void)
{float a;unsigned long b;//测量A通道的功率因素，需要发送EA+5A命令
//测量B通道的功率因素，需要发送EA+A5命令	Uart_Read_HLW8110_Reg(REG_PF_ADDR,3);delay_ms(10);if ( u8_RxBuf[u8_RX_Length-1] == HLW8110_checkSum_Read(u8_RX_Length) ){b = (unsigned long)(u8_RxBuf[0]<<16) + (unsigned long)(u8_RxBuf[1]<<8) + (unsigned long)(u8_RxBuf[2]);printf("A通道功率因素寄存器:%ld\n " ,b);}else{printf("读取A通道功率因素寄存器出错\r\n");B_Read_Error = 1;}if (b>0x800000)       //为负，容性负载{a = (float)(0xffffff-b + 1)/0x7fffff;}else{a = (float)b/0x7fffff;}if (F_AC_P < 0.3) // 小于0.3W，空载或小功率，PF不准a = 0; //功率因素*100，最大为100，最小负100F_AC_PF = a;
}

读取通道相位角，实现代码如下所示：

void Read_HLW8110_Angle(void)
{float a;	unsigned long b;Uart_Read_HLW8110_Reg(REG_ANGLE_ADDR,2);delay_ms(10);if ( u8_RxBuf[u8_RX_Length-1] == HLW8110_checkSum_Read(u8_RX_Length) ){b =(unsigned long)(u8_RxBuf[0]<<8) + (unsigned long)(u8_RxBuf[1]);printf("A通道线相角寄存器:%ld\n " ,b);}else{printf("A通道线相角寄存器出错\r\n");B_Read_Error = 1;}if ( F_AC_PF < 55)	//线性频率50HZ{a = b;a = a * 0.0805;F_Angle = a;}else{//线性频率60HZa = b;a = a * 0.0965;F_Angle = a;}if (F_AC_P < 0.5)		//功率小于0.5时，说明没有负载，相角为0{F_Angle = 0;}if (F_Angle < 90){a = F_Angle;printf("电流超前电压:%f\n " ,a);}else if (F_Angle < 180){a = 180-F_Angle;printf("电流滞后电压:%f\n " ,a);	}else if (F_Angle < 360){a = 360 - F_Angle;printf("电流滞后电压:%f\n " ,a);	}else{a = F_Angle -360;printf("电流超前电压:%f\n " ,a);	}
}

项目资源下载请参见：https://download.csdn.net/download/m0_38106923/87775438