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-rw-r--r--src/stm32f4/internal.h4
1 files changed, 2 insertions, 2 deletions
diff --git a/src/stm32f4/internal.h b/src/stm32f4/internal.h
index 0cfb2664..f1c2fd66 100644
--- a/src/stm32f4/internal.h
+++ b/src/stm32f4/internal.h
@@ -10,12 +10,12 @@
#define GPIO_INPUT 0
#define GPIO_OUTPUT 1
-#define GPIO_FUNCTION 2
+#define GPIO_FUNCTION(fn) (2 | ((fn) << 4))
#define GPIO_ANALOG 3
void enable_pclock(uint32_t periph_base);
uint32_t get_pclock_frequency(uint32_t periph_base);
void clock_setup(void);
-void gpio_peripheral(uint32_t gpio, uint32_t mode, uint32_t func, int pullup);
+void gpio_peripheral(uint32_t gpio, uint32_t mode, int pullup);
#endif // internal.h