W801 Cannot download using serial port

Publish in 2022-06-24 10: 04: 05

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W801 Unable to download the program using the serial port, The serial debugging tool keeps indicating that it needs to be restarted, Pressed reset and still no response, The power circuit is fine, The crystal oscillator is also vibrating, I would like to ask what other reasons may be such a phenomenon?

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isme
isme Certified specialist 2022-06-24
Chilled big watermelon

Take a look at this article, The downloading principle process is described in detail. http: //isme. fun/? log=blog&id=34

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