使用stm32f103c8t6标准库通过PB10,PB11IIC2读取多个INA3221模块检测电流电压代码

以下是使用stm32f103c8t6标准库通过PB10,PB11IIC2读取多个INA3221模块检测电流电压的示例代码：

#include "stm32f10x.h"
#include "stm32f10x_i2c.h"

#define INA3221_ADDR 0x80 // INA3221地址

void I2C_Configuration(void)
{
    GPIO_InitTypeDef GPIO_InitStructure;
    I2C_InitTypeDef I2C_InitStructure;

    RCC_APB1PeriphClockCmd(RCC_APB1Periph_I2C2, ENABLE);
    RCC_APB2PeriphClockCmd(RCC_APB2Periph_GPIOB, ENABLE);

    GPIO_InitStructure.GPIO_Pin = GPIO_Pin_10 | GPIO_Pin_11;
    GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz;
    GPIO_InitStructure.GPIO_Mode = GPIO_Mode_AF_OD;
    GPIO_Init(GPIOB, &GPIO_InitStructure);

    I2C_DeInit(I2C2);
    I2C_InitStructure.I2C_Mode = I2C_Mode_I2C;
    I2C_InitStructure.I2C_DutyCycle = I2C_DutyCycle_2;
    I2C_InitStructure.I2C_OwnAddress1 = 0x00;
    I2C_InitStructure.I2C_Ack = I2C_Ack_Enable;
    I2C_InitStructure.I2C_AcknowledgedAddress = I2C_AcknowledgedAddress_7bit;
    I2C_InitStructure.I2C_ClockSpeed = 100000;
    I2C_Init(I2C2, &I2C_InitStructure);

    I2C_Cmd(I2C2, ENABLE);
}

uint16_t I2C_ReadRegister(uint8_t addr, uint8_t reg)
{
    uint16_t value = 0;

    while (I2C_GetFlagStatus(I2C2, I2C_FLAG_BUSY));

    I2C_GenerateSTART(I2C2, ENABLE);
    while (!I2C_CheckEvent(I2C2, I2C_EVENT_MASTER_MODE_SELECT));

    I2C_Send7bitAddress(I2C2, INA3221_ADDR | I2C_Direction_Transmitter, ENABLE);
    while (!I2C_CheckEvent(I2C2, I2C_EVENT_MASTER_TRANSMITTER_MODE_SELECTED));

    I2C_SendData(I2C2, reg);
    while (!I2C_CheckEvent(I2C2, I2C_EVENT_MASTER_BYTE_TRANSMITTED));

    I2C_GenerateSTART(I2C2, ENABLE);
    while (!I2C_CheckEvent(I2C2, I2C_EVENT_MASTER_MODE_SELECT));

    I2C_Send7bitAddress(I2C2, INA3221_ADDR | I2C_Direction_Receiver, ENABLE);
    while (!I2C_CheckEvent(I2C2, I2C_EVENT_MASTER_RECEIVER_MODE_SELECTED));

    while (!I2C_CheckEvent(I2C2, I2C_EVENT_MASTER_BYTE_RECEIVED));
    value |= I2C_ReceiveData(I2C2) << 8;

    while (!I2C_CheckEvent(I2C2, I2C_EVENT_MASTER_BYTE_RECEIVED));
    value |= I2C_ReceiveData(I2C2);

    I2C_GenerateSTOP(I2C2, ENABLE);

    return value;
}

void INA3221_GetVoltageAndCurrent(float *voltage, float *current)
{
    uint16_t shunt_voltage = I2C_ReadRegister(INA3221_ADDR, 0x01); // 读取毫伏数值
    uint16_t bus_voltage = I2C_ReadRegister(INA3221_ADDR, 0x02); // 读取总线电压值
    uint16_t current_value = I2C_ReadRegister(INA3221_ADDR, 0x04); // 读取电流值

    *voltage = ((float)bus_voltage / 32768.0) * 16.0; // 计算总线电压值，单位为V
    *current = ((float)current_value / 32768.0) * 4.0; // 计算电流值，单位为A
}

int main(void)
{
    float voltage, current;

    I2C_Configuration();

    while (1)
    {
        INA3221_GetVoltageAndCurrent(&voltage, &current);
    }
}

在这个示例代码中，首先定义了INA3221的I2C地址为0x80。然后在`I2C_Configuration()`函数中初始化了I2C2，使用GPIOB的PB10和PB11引脚作为SCL和SDA。接下来定义了`I2C_ReadRegister()`函数用于读取INA3221的寄存器值，该函数通过I2C总线发送读取请求并接收返回数据。最后在`INA3221_GetVoltageAndCurrent()`函数中读取INA3221的总线电压值、电流值和毫伏数值，并计算出实际电压和电流值。

在`main()`函数中，我们使用`INA3221_GetVoltageAndCurrent()`函数读取INA3221的电压和电流值，并不断循环读取。