[demo] Add README.md

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armink
2020-06-26 23:35:23 +08:00
parent 6c26c22070
commit cbad6efc67
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| folder name | flash type |
| :-------------------- | :------------ |
| stm32f405rg | stm32 on-chip |
| stm32f405rg_spi_flash | spi flash |