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在以ARM S3C44B0X为核心处理器的新型流量积算仪表的设计中,利用ARM自带的I2C总线接口模块扩展了A/D转换芯片ADS1110,构成高精度数据采集系统。针对高精度数模转换的特点,优化设计了外围电路并给出了相应的软件设计流程。通过软件设计和硬件电路的结合,实现了数据采集电路的模块化设计,提高了系统的精度和可靠性。
In the design of a new flow totalizer with ARM S3C44B0X as the core processor, the ADS1110 A / D converter chip is expanded by using I2C bus interface module embedded in ARM to form a high-precision data acquisition system. For the characteristics of high-precision digital-to-analog conversion, the peripheral circuits are optimized and the corresponding software design flow is given. Through the combination of software design and hardware circuit, the modular design of data acquisition circuit is realized, which improves the accuracy and reliability of the system.