行业网站建设价格,剪映导出的视频字幕有乱码,织梦网站联系我们的地图怎么做,亚马逊中国官网登录入口目录 前言1 原理图2 IIC地址说明3 寄存器地址说明4 开始工作前配置5 程序代码1#xff09;驱动程序2#xff09;头文件3) 测试代码 前言
INA219 是一款具备 I2C 或 SMBUS 兼容接口的分流器和功率监测计。该器件监测分流器电压降和总线电源电压#xff0c;转换次数和滤波选项… 目录 前言1 原理图2 IIC地址说明3 寄存器地址说明4 开始工作前配置5 程序代码1驱动程序2头文件3) 测试代码 前言
INA219 是一款具备 I2C 或 SMBUS 兼容接口的分流器和功率监测计。该器件监测分流器电压降和总线电源电压转换次数和滤波选项可通过编程设定。可编程校准值与内部乘法器相结合支持直接读取电流值单位安培。通过附加乘法寄存器可计算功率单位瓦。I2C 或 SMBUS 兼容接口 具有 16 个可编程地址。
INA219 可在 0V 至 26V 范围内感测总线中的分压。该器件由 3V 至 5.5V 单电源供电电源的最大流耗为1mA。INA219 的工作温度范围为 -40°C 至 125°C。
1 原理图 2 IIC地址说明 此测试时A0、A1都下拉接地所以INA219的IIC通信地址为1000000B
3 寄存器地址说明 0x00 配置寄存器用来配置工作模式、采集范围以及其他参数0x01 分流电阻两端的电压0x02 总线电压IN-到GND的电压差0x03 功率0x04 经过分流电阻两端的电流0x05 校准寄存器用于对测量结果进行校准
4 开始工作前配置
0x00 寄存器Bit 13设置检测最大检测电压 0 16V1 32V 此处项目需要测3V到5V的电压故设置Bit 13 为 00x00 寄存器Bit 11-12设置总线分流电阻最大的电压此处项目需要测0A到5A的电流故设置Bit 11-12 为 01即量程±80mV可测电流±8A0x00 寄存器Bit 0-2设置工作模式默认0x05 寄存器设置基准值根据需要测的电压、电流范围再套入公式得出结果
由以下公式可得出0x05的配置值。 C a l t r u n c ( 0.04096 C u r r e n t L S B × R s h u n t ) Cal trunc\left ( \frac{0.04096}{CurrentLSB\times Rshunt} \right ) Caltrunc(CurrentLSB×Rshunt0.04096) C u r r e n t L S B M a x i m u m E x p e c t e d C u r r e n t 2 15 CurrentLSB \frac{Maximum Expected Current}{2^{15}} CurrentLSB215MaximumExpectedCurrent
数据手册说明文档
5 程序代码
1驱动程序
#include main.h
#include ina219aidcnr_helper.huint16_t ina219_calibrationValue;
uint16_t ina219_currentDivider_mA;
float ina219_powerMultiplier_mW;/*** brief The IIC reads 16bit data from the specified register address.* param ina219 Slave configuration structure of the IIC.* param registerAddress Internal memory address.* return 16 bit register data.*/
uint16_t INA219_ReadDataForRegister_16Bits(INA219_t *ina219, uint8_t registerAddress)
{uint8_t Value[2];HAL_I2C_Mem_Read(ina219-ina219_i2c, (INA219_ADDRESS1), registerAddress, 1, Value, 2, 1000);return ((Value[0] 8) | Value[1]);
}/*** brief Writes 16 bits of data to the register.* param ina219 Slave configuration structure of the IIC.* param registerAddress Internal memory address.* param Value 16 bits of data to be written.*/
void INA219_WriteDataToRegister_16Bits(INA219_t *ina219, uint8_t registerAddress, uint16_t Value)
{uint8_t regAddr[2];/* High Byte */regAddr[0] (Value 8) 0xff;/* Low Byte */regAddr[1] (Value 0) 0xff;HAL_I2C_Mem_Write(ina219-ina219_i2c, (INA219_ADDRESS1), registerAddress, 1, (uint8_t*)regAddr, 2, 1000);
}/*** brief Read bus voltage.* param ina219 Slave configuration structure of the IIC.* return Read voltage value, unit mV.*/
uint16_t INA219_ReadBusVoltage(INA219_t *ina219)
{uint16_t result INA219_ReadDataForRegister_16Bits(ina219, INA219_REG_BUS_VOLTAGE);/* return mV */return ((result 3 ) * 4);
}/*** brief Read current register value.* param ina219 Slave configuration structure of the IIC.* return Current register value.*/
uint16_t INA219_ReadCurrentRaw(INA219_t *ina219)
{uint16_t result INA219_ReadDataForRegister_16Bits(ina219, INA219_REG_CURRENT);return (result);
}/*** brief Read current register value, unit mA.* param ina219 Slave configuration structure of the IIC.* return Current value.*/
uint16_t INA219_ReadCurrent_mA(INA219_t *ina219)
{uint16_t result INA219_ReadCurrentRaw(ina219);return (result / ina219_currentDivider_mA);
}/*** brief Read current register value, unit mV.* param ina219 Slave configuration structure of the IIC.* return Shunt Voltage value.*/
uint16_t INA219_ReadShuntVoltage_mV(INA219_t *ina219)
{uint16_t result INA219_ReadDataForRegister_16Bits(ina219, INA219_REG_SHUNT_VOLTAGE);/* When multiple sign bits are present, they will all be the same value.* Negative numbers are represented in 2s complement format.* Generate the 2s complement of a negative number by complementing the absolute value binary number and adding 1.* Extend the sign, denoting a negative number by setting the MSB 1.* Extend the sign to any additional sign bits to form the 16-bit word. */if(result MAX_SHUNT_RANGE){result 65536 - MAX_SHUNT_RANGE;}/* Shunt voltage, unit mV. */return (result / 100);
}/*** brief INA219 system reset.* param ina219 Slave configuration structure of the IIC.*/
void INA219_Reset(INA219_t *ina219)
{INA219_WriteDataToRegister_16Bits(ina219, INA219_REG_CONFIG, INA219_CONFIG_RESET);HAL_Delay(1);
}/*** brief Set calibration register.* param ina219 Slave configuration structure of the IIC.* param calibrationData Calibrated data.*/
void INA219_SetCalibration(INA219_t *ina219, uint16_t calibrationData)
{INA219_WriteDataToRegister_16Bits(ina219, INA219_REG_CALIBRATION, calibrationData);
}/*** brief Gets the value of the configuration register.* param ina219 Slave configuration structure of the IIC.* return Configuration Register value.*/
uint16_t INA219_GetConfigInfo(INA219_t *ina219)
{uint16_t result INA219_ReadDataForRegister_16Bits(ina219, INA219_REG_CONFIG);return result;
}/*** brief Set configuration register.* param ina219 Slave configuration structure of the IIC.* param configData Configuration data.*/
void INA219_SetConfig(INA219_t *ina219, uint16_t configData)
{INA219_WriteDataToRegister_16Bits(ina219, INA219_REG_CONFIG, configData);
}/*** brief The measurement results are calibrated. Voltage range is 16V, Current range is 8A.* param ina219 Slave configuration structure of the IIC.*/
void INA219_SetCalibration_16V_8A(INA219_t *ina219)
{uint16_t configInfo INA219_CONFIG_VOLTAGE_RANGE_16V |INA219_CONFIG_GAIN_2_80MV | INA219_CONFIG_BADCRES_12BIT |INA219_CONFIG_SADCRES_12BIT_1S_532US |INA219_CONFIG_MODE_SANDBVOLT_CONTINUOUS;// Current_LSB Maximum Expected Current / 2^15 (80 / 10) / 2^15 0.0002// Cal 0.04096 / (Current_LSB / R) 0.04096 / (0.0002A * 0.01R) 20480 0x5000// Calibration Register 20480ina219_calibrationValue 20480;// 1mA Current_LSB * bits 200uA * 5bit (5 bit/mA)ina219_currentDivider_mA 5;// 1mW Power_LSB * bits 4mW * 0.25bit (0.25f bit/mW)ina219_powerMultiplier_mW 0.25f;INA219_SetCalibration(ina219, ina219_calibrationValue);INA219_SetConfig(ina219, configInfo);
}/*** brief Ina219 driver initialization* param ina219 Slave configuration structure of the IIC.* param i2c Pointer to a I2C_HandleTypeDef structure that contains* the configuration information for the specified I2C.* param Address Configuration data.* return status.*/
uint8_t INA219_Init(INA219_t *ina219, I2C_HandleTypeDef *i2c, uint8_t Address)
{ina219-ina219_i2c i2c;ina219-Address Address;ina219_currentDivider_mA 0;ina219_powerMultiplier_mW 0;uint8_t ina219_isReady HAL_I2C_IsDeviceReady(i2c, (Address 1), 3, 2);if(ina219_isReady HAL_OK){INA219_Reset(ina219);INA219_SetCalibration_16V_8A(ina219);return 1;}else{return 0;}
}2头文件 #ifndef INA219AIDCNR_HELPER_H
#define INA219AIDCNR_HELPER_H#define INA219_ADDRESS (0x40)
#define MAX_SHUNT_RANGE (0x0FA0)/* Register */
#define INA219_REG_CONFIG (0x00)
#define INA219_REG_SHUNT_VOLTAGE (0x01)
#define INA219_REG_BUS_VOLTAGE (0x02)
#define INA219_REG_POWER (0x03)
#define INA219_REG_CURRENT (0x04)
#define INA219_REG_CALIBRATION (0x05)
//
#define INA219_CONFIG_RESET (0x8000)
//
#define INA219_CONFIG_VOLTAGE_RANGE_16V (0x0000) // 0-16V Range
#define INA219_CONFIG_VOLTAGE_RANGE_32V (0x2000) // 0-32V Range#define INA219_CONFIG_GAIN_1_40MV (0x0000) // Gain 1, 40mV Range
#define INA219_CONFIG_GAIN_2_80MV (0x0800) // Gain 2, 80mV Range
#define NA219_CONFIG_GAIN_4_160MV (0x1000) // Gain 4, 160mV Range
#define INA219_CONFIG_GAIN_8_320MV (0x1800) // Gain 8, 320mV Range#define INA219_CONFIG_BADCRES_9BIT (0x0000) // 9-bit bus res 0..511
#define INA219_CONFIG_BADCRES_10BIT (0x0080) // 10-bit bus res 0..1023
#define INA219_CONFIG_BADCRES_11BIT (0x0100) // 11-bit bus res 0..2047
#define INA219_CONFIG_BADCRES_12BIT (0x0180) // 12-bit bus res 0..4097
#define INA219_CONFIG_BADCRES_12BIT_2S_1060US (0x0480) // 2 x 12-bit bus samples averaged together
#define INA219_CONFIG_BADCRES_12BIT_4S_2130US (0x0500) // 4 x 12-bit bus samples averaged together
#define INA219_CONFIG_BADCRES_12BIT_8S_4260US (0x0580) // 8 x 12-bit bus samples averaged together
#define INA219_CONFIG_BADCRES_12BIT_16S_8510US (0x0600) // 16 x 12-bit bus samples averaged together
#define INA219_CONFIG_BADCRES_12BIT_32S_17MS (0x0680) // 32 x 12-bit bus samples averaged together
#define INA219_CONFIG_BADCRES_12BIT_64S_34MS (0x0700) // 64 x 12-bit bus samples averaged together
#define INA219_CONFIG_BADCRES_12BIT_128S_69MS (0x0780) // 128 x 12-bit bus samples averaged together#define INA219_CONFIG_SADCRES_9BIT_1S_84US (0x0000) // 1 x 9-bit shunt sample
#define INA219_CONFIG_SADCRES_10BIT_1S_148US (0x0008) // 1 x 10-bit shunt sample
#define INA219_CONFIG_SADCRES_11BIT_1S_276US (0x0010) // 1 x 11-bit shunt sample
#define INA219_CONFIG_SADCRES_12BIT_1S_532US (0x0018) // 1 x 12-bit shunt sample
#define INA219_CONFIG_SADCRES_12BIT_2S_1060US (0x0048) // 2 x 12-bit shunt samples averaged together
#define INA219_CONFIG_SADCRES_12BIT_4S_2130US (0x0050) // 4 x 12-bit shunt samples averaged together
#define INA219_CONFIG_SADCRES_12BIT_8S_4260US (0x0058) // 8 x 12-bit shunt samples averaged together
#define INA219_CONFIG_SADCRES_12BIT_16S_8510US (0x0060) // 16 x 12-bit shunt samples averaged together
#define INA219_CONFIG_SADCRES_12BIT_32S_17MS (0x0068) // 32 x 12-bit shunt samples averaged together
#define INA219_CONFIG_SADCRES_12BIT_64S_34MS (0x0070) // 64 x 12-bit shunt samples averaged together
#define INA219_CONFIG_SADCRES_12BIT_128S_69MS (0x0078) // 128 x 12-bit shunt samples averaged together#define INA219_CONFIG_MODE_MASK 0x07
#define INA219_CONFIG_MODE_POWERDOWN 0x00
#define INA219_CONFIG_MODE_SVOLT_TRIGGERED 0x01
#define INA219_CONFIG_MODE_BVOLT_TRIGGERED 0x02
#define INA219_CONFIG_MODE_SANDBVOLT_TRIGGERED 0x03
#define INA219_CONFIG_MODE_ADCOFF 0x04
#define INA219_CONFIG_MODE_SVOLT_CONTINUOUS 0x05
#define INA219_CONFIG_MODE_BVOLT_CONTINUOUS 0x06
#define INA219_CONFIG_MODE_SANDBVOLT_CONTINUOUS 0x07typedef struct
{I2C_HandleTypeDef *ina219_i2c;uint8_t Address;
} INA219_t;uint8_t INA219_Init(INA219_t *ina219, I2C_HandleTypeDef *i2c, uint8_t Address);
uint16_t INA219_ReadBusVoltage(INA219_t *ina219);
uint16_t INA219_ReadCurrent_mA(INA219_t *ina219);
uint16_t INA219_ReadCurrent_raw(INA219_t *ina219);
uint16_t INA219_ReadShuntVoltage_mV(INA219_t *ina219);
uint16_t INA219_ReadDataForRegister_16Bits(INA219_t *ina219, uint8_t registerAddress);
uint16_t INA219_GetConfigInfo(INA219_t *ina219);void INA219_Reset(INA219_t *ina219);
void INA219_SetCalibration(INA219_t *ina219, uint16_t calibrationData);
void INA219_SetConfig(INA219_t *ina219, uint16_t configData);
void INA219_SetCalibration_16V_8A(INA219_t *ina219);
void INA219_WriteDataToRegister_16Bits(INA219_t *ina219, uint8_t registerAddress, uint16_t Value);#endif //INA219AIDCNR_HELPER_H3) 测试代码
int main(void)
{/* USER CODE BEGIN 1 */uint16_t vbus, vshunt, current;/* USER CODE END 1 *//* MCU Configuration--------------------------------------------------------*//* Reset of all peripherals, Initializes the Flash interface and the Systick. */HAL_Init();/* USER CODE BEGIN Init *//* USER CODE END Init *//* Configure the system clock */SystemClock_Config();/* USER CODE BEGIN SysInit *//* USER CODE END SysInit *//* Initialize all configured peripherals */MX_GPIO_Init();MX_USART1_UART_Init();MX_I2C2_Init();/* USER CODE BEGIN 2 */while(!INA219_Init(ina219, hi2c2, INA219_ADDRESS)){}/* USER CODE END 2 *//* Infinite loop *//* USER CODE BEGIN WHILE */while (1){/* USER CODE END WHILE *//* USER CODE BEGIN 3 */vbus INA219_ReadBusVoltage(ina219);vshunt INA219_ReadShuntVoltage_mV(ina219);current INA219_ReadCurrent_mA(ina219);sprintf(strBuffer, INA219 param: vbus:%d mV; current:%d mA\r\n, vbus, current);HAL_UART_Transmit(huart1, strBuffer, strlen(strDataBuf), 0xff);UserDelay_ms(500);}
