PC机利用MSCOMM控件通过串口访问下位机，下位机实现DS18B20温度采集，采集数据通过串口上传PC机，PC机利用NTGRAPH控件绘制出温度曲线图！-PC, via serial port access control using MSCOMM the lower position, the next crew to achieve DS18B20 the temperature acquisition, collecting data through serial port PC, up

2440 linux system serial communication routines