摘要
基于温度检测系统的设计要求,介绍了以LPC935单片机实现系统的设计思路;设计中主要针对目前单片机内嵌A/D分辨率普遍不高的缺点,提出了一种独特的、简便易行的软硬件设计方法,在使用LPC935内部8位A/D的情况下,将系统的分辨率提高至12位,并在此基础上采用过采样算法再次提高分辨率至16位,保证了系统的低成本和高测量精度;实践证明,该方法具有使用和推广价值。
The thoughtway and methods that based on LPC935 MCU and the criterion of temperature measuring system are introduced. Due to low resolution of built--in ADC in the present MCU, a unique and easy design approach of software and hardware is proposed in this system design. Although system uses built--in ADC of LPC935, which has 8bits resolution, but resolution of system can reach upwards to 12bits from 8bits, and it is reincreased to 16bits by oversampling arithmetic. The designs guarantees the system lower cost and higher measurement accuracy.
出处
《计算机测量与控制》
CSCD
2007年第10期1273-1275,共3页
Computer Measurement &Control
