Design of a Data Recorder Based on a RISC-V MCU

Addressing the demands for real-time data storage in industrial environments and considering electromagnetic interference, the design of a data recorder is presented in this paper. Taking advantage of the CH32V307's connectivity features, the data recorder adopts this RISC-V SoC chip as the main controller and implies functions, including receiving data through the RS422 serial port, writing data into the microSD card, and exporting data to the authorized U-disks, which makes further offline data analysis possible and convenient. Experimental results demonstrate that the recorder, equipped with the real-time OS, RT-Thread, achieves timely data recording from the serial port. Additionally, the write speed to the microSD card is no less than 16MB/s, with a read speed of 8MB/s at least. The write speed to the U-disks is no less than 19MB/s, and the read speed is 26MB/s at least. Furthermore, by employing electrically isolated electronic components, the data bus is isolated from the system, ensuring system safety. In conclusion, the design proposed meets the application requirements and offers a reference solution for real-time data recording in industrial environments with a high safety level.