Multi CP210x USB port used in fixed com port number on the PC Windows
首先插上設備的USB(想要變更的設備)到PC USB port(只要是使用CP21xx IC 都可以), 目的就是要變更裝置的SN號碼使driver 可以分辨在同一個VID/PID下的USB IC, 如此就可以共用同一個電腦下的同一隻driver可以擁有各自獨立的Port number; 或是依CP21xx出貨標準, SN統一為0001 這樣是浮動的COM port, 不同用使用方法.
按原廠指示的確可以完成這樣的訴求:
https://www.cubeatsystems.com/ifx-49/resources/datasheets/AN721.pdf
軟件下載地址:
https://www.silabs.com/support/resources.ct-application-notes.ct-example-code.p-interface
AN721: CP210x/CP211x Device Customization Guide 6.7.5 Example Code
執行Utility變更SN number(其他都不要變更), 操作上一張圖解決了你的疑問:
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