汽车ABS系统车速显示和自动空调系统温度显示，采用周立功的7290芯片开发，单片机完成数据采集，通过串口向外发送，在上位机处理和显示-Automotive ABS systems speed display and automatic air conditioning system temperature showed that the use of weeks of the 7290 chip Ligong development, complete single-chip data acqu