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bluepill: fix re-enumeration #62

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bluepill: fix re-enumeration #62

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7 changes: 6 additions & 1 deletion boards/stm32-bluepill.h
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Original file line number Diff line number Diff line change
Expand Up @@ -20,10 +20,15 @@
#define BOARD_PIN_LED GPIO13
#define BOARD_LED_HIGH_IS_BUSY true

/*
* Pull USB D+ low on startup, to re-enumerate.
* Bluepill board lacks dedicated pin for handling this pull-up.
* https://stm32world.com/wiki/STM32_USB_Device_Renumeration
*/
#define BOARD_RCC_USB_PULLUP RCC_GPIOA
#define BOARD_PORT_USB_PULLUP GPIOA
#define BOARD_PIN_USB_PULLUP GPIO12
#define BOARD_USB_HIGH_IS_PULLUP true
#define BOARD_USB_HIGH_IS_PULLUP false

/* Currently you can only use SPI1, since it has highest clock. */

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