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电子商务的网站建设名词解释,wordpress应用商城wpjam,邢台大峡谷,手机网站优化需要注意什么系统连接与工作原理 整个系统的数据流动如下#xff1a;硬件连接 1. INA226 与 STM32 连接 (I2C接口)INA226 引脚STM32 引脚说明VCC3.3V电源正极GNDGND电源地SCLPB6 (或其它I2C SCL引脚)I2C时钟线SDAPB7 (或其它I2C SDA引脚)I2C数据线A0GND或VCC地址选择引脚0A1GND或VCC地址选…系统连接与工作原理整个系统的数据流动如下硬件连接1. INA226 与 STM32 连接 (I2C接口)INA226 引脚STM32 引脚说明VCC3.3V电源正极GNDGND电源地SCLPB6 (或其它I2C SCL引脚)I2C时钟线SDAPB7 (或其它I2C SDA引脚)I2C数据线A0GND或VCC地址选择引脚0A1GND或VCC地址选择引脚1INA226的I2C地址由A0和A1引脚决定两个都接地(GND)0x40 (7位地址)在代码中HAL库通常需要将7位地址左移1位0x40 1 0x802. HMI串口屏与STM32连接 (UART接口)HMI串口屏引脚STM32 引脚说明RXPA2 (USART2_TX)串口接收数据TXPA3 (USART2_RX)串口发送数据可选GNDGND共同地线VCC5V或3.3V电源根据屏规格3. INA226 与被测电路连接INA226 引脚被测电路连接说明V电源正极测量总线电压V-负载输入正极S电源正极电流检测正S-负载输入正极电流检测负注意需要在S和S-之间连接一个分流电阻Shunt Resistor例如0.1Ω/1W的精密电阻。电流通过测量该电阻两端的压降计算得出。STM32代码实现 (HAL库)1. INA226驱动代码 (ina226.c / ina226.h)首先我们需要编写INA226的驱动程序。ina226.h#ifndefINA226_H#defineINA226_H#includestm32f1xx_hal.h// 根据你的STM32系列调整// INA226寄存器地址#defineINA226_CONFIG_REG0x00#defineINA226_SHUNT_VOLTAGE_REG0x01#defineINA226_BUS_VOLTAGE_REG0x02#defineINA226_POWER_REG0x03#defineINA226_CURRENT_REG0x04#defineINA226_CALIBRATION_REG0x05#defineINA226_MASK_ENABLE_REG0x06#defineINA226_ALERT_LIMIT_REG0x07#defineINA226_MANUFACTURER_ID_REG0xFE#defineINA226_DIE_ID_REG0xFF// INA226默认I2C地址A0和A1接地#defineINA226_ADDRESS0x80// (0x40 1)// 配置寄存器设置根据你的需求调整#defineINA226_CONFIG_DEFAULT0x4727// 0100 0111 0010 0111// 函数声明voidINA226_Init(I2C_HandleTypeDef*hi2c);floatINA226_ReadBusVoltage(void);floatINA226_ReadShuntVoltage(void);floatINA226_ReadCurrent(void);floatINA226_ReadPower(void);uint16_tINA226_ReadManufacturerID(void);uint16_tINA226_ReadDieID(void);externI2C_HandleTypeDef hi2c1;// 你的I2C句柄#endifina226.c#includeina226.h#includemath.h// I2C句柄I2C_HandleTypeDef*ina226_i2c;// 校准值需要根据你的分流电阻计算staticuint16_tcalibrationValue0;// 将在Init中计算voidINA226_Init(I2C_HandleTypeDef*hi2c){ina226_i2chi2c;// 验证器件IDuint16_tmanufIDINA226_ReadManufacturerID();uint16_tdieIDINA226_ReadDieID();// 预期值制造商ID应为0x5449芯片ID应为0x2260if(manufID!0x5449||dieID!0x2260){// 器件识别失败处理错误Error_Handler();}// 计算校准值示例分流电阻0.1Ω最大预期电流2A// 公式Cal 0.00512 / (Current_LSB * Rshunt)// Current_LSB 最大预期电流 / 2^15floatmaxExpectedCurrent2.0;// 2AfloatrShunt0.1;// 0.1ΩfloatcurrentLSBmaxExpectedCurrent/32768.0;calibrationValue(uint16_t)(0.00512/(currentLSB*rShunt));// 写入校准寄存器uint8_tcalibData[3]{INA226_CALIBRATION_REG,(uint8_t)(calibrationValue8),(uint8_t)(calibrationValue0xFF)};HAL_I2C_Master_Transmit(ina226_i2c,INA226_ADDRESS,calibData,3,HAL_MAX_DELAY);// 写入配置寄存器uint8_tconfigData[3]{INA226_CONFIG_REG,(uint8_t)(INA226_CONFIG_DEFAULT8),(uint8_t)(INA226_CONFIG_DEFAULT0xFF)};HAL_I2C_Master_Transmit(ina226_i2c,INA226_ADDRESS,configData,3,HAL_MAX_DELAY);}// 读取总线电压单位伏特floatINA226_ReadBusVoltage(){uint8_tregINA226_BUS_VOLTAGE_REG;uint8_tdata[2];HAL_I2C_Master_Transmit(ina226_i2c,INA226_ADDRESS,reg,1,HAL_MAX_DELAY);HAL_I2C_Master_Receive(ina226_i2c,INA226_ADDRESS,data,2,HAL_MAX_DELAY);uint16_tvoltageRaw(data[0]8)|data[1];returnvoltageRaw*0.00125;// 1.25mV/LSB}// 读取电流值单位安培floatINA226_ReadCurrent(){uint8_tregINA226_CURRENT_REG;uint8_tdata[2];HAL_I2C_Master_Transmit(ina226_i2c,INA226_ADDRESS,reg,1,HAL_MAX_DELAY);HAL_I2C_Master_Receive(ina226_i2c,INA226_ADDRESS,data,2,HAL_MAX_DELAY);int16_tcurrentRaw(data[0]8)|data[1];// 计算Current_LSBfloatmaxExpectedCurrent2.0;// 与初始化时一致floatcurrentLSBmaxExpectedCurrent/32768.0;returncurrentRaw*currentLSB;}// 读取其他数据的函数类似实现...uint16_tINA226_ReadManufacturerID(){uint8_tregINA226_MANUFACTURER_ID_REG;uint8_tdata[2];HAL_I2C_Master_Transmit(ina226_i2c,INA226_ADDRESS,reg,1,HAL_MAX_DELAY);HAL_I2C_Master_Receive(ina226_i2c,INA226_ADDRESS,data,2,HAL_MAX_DELAY);return(data[0]8)|data[1];}uint16_tINA226_ReadDieID(){uint8_tregINA226_DIE_ID_REG;uint8_tdata[2];HAL_I2C_Master_Transmit(ina226_i2c,INA226_ADDRESS,reg,1,HAL_MAX_DELAY);HAL_I2C_Master_Receive(ina226_i2c,INA226_ADDRESS,data,2,HAL_MAX_DELAY);return(data[0]8)|data[1];}2. 主程序代码 (main.c)#includemain.h#includestm32f1xx_hal.h#includeina226.h#includestdio.h#includestring.h// 全局变量I2C_HandleTypeDef hi2c1;UART_HandleTypeDef huart2;// 函数声明voidSystemClock_Config(void);staticvoidMX_GPIO_Init(void);staticvoidMX_I2C1_Init(void);staticvoidMX_USART2_UART_Init(void);voidSendToHMI(constchar*variable,floatvalue);intmain(void){HAL_Init();SystemClock_Config();MX_GPIO_Init();MX_I2C1_Init();MX_USART2_UART_Init();// 初始化INA226INA226_Init(hi2c1);// 给INA226和HMI屏一点启动时间HAL_Delay(100);charmsg[50];sprintf(msg,System Started\r\n);HAL_UART_Transmit(huart2,(uint8_t*)msg,strlen(msg),HAL_MAX_DELAY);while(1){// 读取电流值floatcurrentINA226_ReadCurrent();// 发送到HMI串口屏SendToHMI(current,current);// 可选读取并发送其他值floatvoltageINA226_ReadBusVoltage();SendToHMI(voltage,voltage);// 每秒更新一次可根据需要调整HAL_Delay(1000);}}// 发送数据到HMI串口屏的函数voidSendToHMI(constchar*variable,floatvalue){charbuffer[50];if(strcmp(variable,current)0){// 发送电流值到HMI的n0组件数值显示sprintf(buffer,n0.val%d\xFF\xFF\xFF,(int)(value*1000));// 转换为毫安HAL_UART_Transmit(huart2,(uint8_t*)buffer,strlen(buffer),HAL_MAX_DELAY);// 可选同时发送到文本组件显示更详细的信息sprintf(buffer,t0.txt\%.2fA\\xFF\xFF\xFF,value);HAL_UART_Transmit(huart2,(uint8_t*)buffer,strlen(buffer),HAL_MAX_DELAY);}elseif(strcmp(variable,voltage)0){// 发送电压值到HMI的n1组件sprintf(buffer,n1.val%d\xFF\xFF\xFF,(int)(value*1000));// 转换为毫伏HAL_UART_Transmit(huart2,(uint8_t*)buffer,strlen(buffer),HAL_MAX_DELAY);sprintf(buffer,t1.txt\%.2fV\\xFF\xFF\xFF,value);HAL_UART_Transmit(huart2,(uint8_t*)buffer,strlen(buffer),HAL_MAX_DELAY);}}// 系统时钟配置voidSystemClock_Config(void){// 根据你的STM32型号配置}// I2C初始化staticvoidMX_I2C1_Init(void){hi2c1.InstanceI2C1;hi2c1.Init.ClockSpeed400000;// 400kHzhi2c1.Init.DutyCycleI2C_DUTYCYCLE_2;hi2c1.Init.OwnAddress10;hi2c1.Init.AddressingModeI2C_ADDRESSINGMODE_7BIT;hi2c1.Init.DualAddressModeI2C_DUALADDRESS_DISABLE;hi2c1.Init.OwnAddress20;hi2c1.Init.GeneralCallModeI2C_GENERALCALL_DISABLE;hi2c1.Init.NoStretchModeI2C_NOSTRETCH_DISABLE;HAL_I2C_Init(hi2c1);}// USART2初始化用于HMI串口屏staticvoidMX_USART2_UART_Init(void){huart2.InstanceUSART2;huart2.Init.BaudRate9600;// 或115200根据你的HMI屏设置huart2.Init.WordLengthUART_WORDLENGTH_8B;huart2.Init.StopBitsUART_STOPBITS_1;huart2.Init.ParityUART_PARITY_NONE;huart2.Init.ModeUART_MODE_TX_RX;huart2.Init.HwFlowCtlUART_HWCONTROL_NONE;huart2.Init.OverSamplingUART_OVERSAMPLING_16;HAL_UART_Init(huart2);}// GPIO初始化staticvoidMX_GPIO_Init(void){// GPIO初始化代码}HMI串口屏配置HMI串口屏通常使用USART HMI或类似的软件进行配置。1. 在HMI屏上创建显示元件添加一个数值显示元件如n0用于显示电流值添加一个文本显示元件如t0用于显示带单位的电流值2. HMI屏指令格式STM32需要按照HMI屏的协议格式发送数据指令格式组件ID.属性值[0xFF 0xFF 0xFF] 示例n0.val1000\xFF\xFF\xFF设置n0组件的值为1000参考代码 STM32读取INA226的电流值 并用串口发送给HMI串口屏显示www.3dddown.com/csa/56677.html调试与优化建议I2C通信调试如果读取不到INA226的数据先用逻辑分析仪或示波器检查I2C信号。确认INA226的地址是否正确A0和A1引脚电平决定地址。检查I2C线路上是否有适当的上拉电阻通常4.7kΩ。电流测量校准INA226的测量精度高度依赖校准寄存器的设置。校准公式为CAL 0.00512 / (Current_LSB × Rshunt)其中Current_LSB 最大预期电流 / 32768可以用万用表测量实际电流与INA226读数对比微调校准值。串口通信调试确保STM32与HMI屏的波特率、数据位、停止位和校验位设置一致。HMI指令必须以0xFF 0xFF 0xFF结尾。抗干扰处理电流检测路径特别是分流电阻连接应尽量短而直接减少噪声干扰。在INA226的电源引脚附近添加去耦电容100nF。功能扩展可以增加功率计算和电能累计功能。添加阈值报警功能当电流超过设定值时在HMI屏上显示警告。