[Solved] Error: Flash Download failed – “Cortex-M3“

I encountered this problem because I reinstalled keil. There was no problem before. There was no problem with my chip selection, memory capacity and debug, so I deleted the chip package pack

The path is generally C: keil5 \ arm \ pack \ keil \ stm32f1xx_ DFP, delete this version 2.2.0

Before downloading the 1.0.5 version, just restart keil5 (for reference only)

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