【MCXA156开发板测评】+P3T1755温度检测与显示

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【MCXA156开发板测评】+P3T1755温度检测与显示 [复制链接]

在MCXA156开发板上配有温度传感器P3T1755，该传感器以I2C方式工作，其电路如图1所示。

 

图1 传感器电路

 

 

进行传感器测试的主程序为：

int main(void)
{
    status_t result = kStatus_Success;
    i3c_master_config_t masterConfig;
    p3t1755_config_t p3t1755Config;
    double temperature;
    CLOCK_SetClockDiv(kCLOCK_DivI3C0_FCLK, 4U);
    CLOCK_AttachClk(kFRO_HF_DIV_to_I3C0FCLK);
    BOARD_InitPins();
    BOARD_InitBootClocks();
    BOARD_InitDebugConsole();
    PRINTF("\r\nI3C master read sensor data example.\r\n");
    I3C_MasterGetDefaultConfig(&masterConfig);
    masterConfig.baudRate_Hz.i2cBaud          = EXAMPLE_I2C_BAUDRATE;
    masterConfig.baudRate_Hz.i3cPushPullBaud  = EXAMPLE_I3C_PP_BAUDRATE;
    masterConfig.baudRate_Hz.i3cOpenDrainBaud = EXAMPLE_I3C_OD_BAUDRATE;
    masterConfig.enableOpenDrainStop          = false;
    masterConfig.disableTimeout               = true;
    I3C_MasterInit(EXAMPLE_MASTER, &masterConfig, I3C_MASTER_CLOCK_FREQUENCY);
    I3C_MasterTransferCreateHandle(EXAMPLE_MASTER, &g_i3c_m_handle, &masterCallback, NULL);
    result = p3t1755_set_dynamic_address();
    if (result != kStatus_Success)
    {
        PRINTF("\r\nP3T1755 set dynamic address failed.\r\n");
    }
    p3t1755Config.writeTransfer = I3C_WriteSensor;
    p3t1755Config.readTransfer  = I3C_ReadSensor;
    p3t1755Config.sensorAddress = SENSOR_ADDR;
    P3T1755_Init(&p3t1755Handle, &p3t1755Config);
    while (1)
    {
        result = P3T1755_ReadTemperature(&p3t1755Handle, &temperature);
        if (result != kStatus_Success)
        {
            PRINTF("\r\nP3T1755 read temperature failed.\r\n");
        }
        else
        {
            PRINTF("\r\nTemperature:%f \r\n", temperature);
        }
        SDK_DelayAtLeastUs(1000000, CLOCK_GetCoreSysClkFreq());
    }
}

 

经程序的编译与下载，其测试结果如图2所示。

 

图2 检测效果

 

由此可见，P3T1755这款温度传感器的精度还是蛮高的。