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Gd32 F3 pin mapping problem SW interface cannot be burned
2022-07-07 15:38:00 【sgmcy】
Used GD32F303 As a development
carelessly , Hardware design , Used PA15 Port as SPI Of CS Pin
When debugging at first , Find out SPI The timing of reading and writing is wrong , No data
Then comment out all the code , Separate settings PA15 The port of
But the discovery software can be set , You can also read this PA15 High level or low level
however , Hardware measurement , It is found that the low level or high level of this pin cannot be grasped , unstable
Finally, I found that ,
PA15 This port , Default as JTDI Use , If you want to use it as a general IO Words of mouth , You need to map it before you can use
gpio_pin_remap_config
Call this function to remap ports .
When calling this port , The parameters initially passed are :GPIO_SWJ_DISABLE_REMAP
This can lead to SWJ Out of commission
Pass this parameter ,GPIO_SWJ_SWDPENABLE_REMAP,SWJ It can be used normally. , Download code
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