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-rw-r--r--src/stm32/internal.h1
1 files changed, 1 insertions, 0 deletions
diff --git a/src/stm32/internal.h b/src/stm32/internal.h
index b5971ed7..0422bf65 100644
--- a/src/stm32/internal.h
+++ b/src/stm32/internal.h
@@ -32,6 +32,7 @@ extern GPIO_TypeDef * const digital_regs[];
#define GPIO_INPUT 0
#define GPIO_OUTPUT 1
#define GPIO_OPEN_DRAIN 0x100
+#define GPIO_HIGH_SPEED 0x200
#define GPIO_FUNCTION(fn) (2 | ((fn) << 4))
#define GPIO_ANALOG 3
void gpio_peripheral(uint32_t gpio, uint32_t mode, int pullup);