stm32g030f6p6读取ina3221

uint16_t INA3221_GetShuntVoltage(uint8_t channel)
{
    uint32_t temp = 0;
    switch (channel)
    {
    case 1:
        temp = INA3221_ReadData(INA3221_ADDR, INA3221_CH1SHUNT_REG);
        break;
    case 2:
        temp = INA3221_ReadData(INA3221_ADDR, INA3221_CH2SHUNT_REG);
        break;
    case 3:
        temp = INA3221_ReadData(INA3221_ADDR, INA3221_CH3SHUNT_REG);
        break;
    default:
        break;
    }
		
    if (temp & 0x8000)
        temp = ~(temp - 1);
		//   // 1 LSB = 40uV
    return (uint16_t)(temp>>3)*40;
}

参考：https://www.ti.com/lit/ds/symlink/ina3221.pdf

注意 1lsb是40uv，需要乘以40uv，得到的单位是是uV，除以取样电阻就是电流

((float)INA3221_GetShuntVoltage(i+1))/1000/1000/0.005; //current_A

uint16_t INA3221_GetVoltage(uint8_t channel)
{
    uint32_t temp = 0;
    switch (channel)
    {
    case 1:
        temp = INA3221_ReadData(INA3221_ADDR, INA3221_CH1BUS_REG);
        break;
    case 2:
        temp = INA3221_ReadData(INA3221_ADDR, INA3221_CH2BUS_REG);
        break;
    case 3:
        temp = INA3221_ReadData(INA3221_ADDR, INA3221_CH3BUS_REG);
        break;
    default:
        break;
    }
    if (temp & 0x8000)
        temp = ~(temp - 1);
    return (uint16_t)(temp>>3)*8;
}

电压同理 1lsb 8mV，右移三位再乘8 其实就是寄存器值

(float)INA3221_GetVoltage(i+1)/1000; //voltage_V