PC机与智能仪器串口通信,通过串口对温度值进行采样，计算最小值，最大值，平均值,PC machines and intelligent serial communication apparatus through the serial port on the sample temperature to calculate the minimum, maximum, average

linux下S3C2440控制PCF8591，读取4通道数据并计算平均值。关键点是，每次读取必须抛掉第一个数据，有效数据从第二个算起-S3C2440 linux under control PCF8591, 4-channel data read and calculate the average. The key point is that each read data to discard the first valid data the second counting! ! ! ! !