1 files changed, 38 insertions, 0 deletions
diff --git a/stmhal/exti.h b/stmhal/exti.h
new file mode 100644
index 000000000..a6b50b26e
--- /dev/null
+++ b/stmhal/exti.h
@@ -0,0 +1,38 @@
+// Vectors 0-15 are for regular pins
+// Vectors 16-22 are for internal sources.
+//
+// Use the following constants for the internal sources:
+
+#define EXTI_PVD_OUTPUT         (16)
+#define EXTI_RTC_ALARM          (17)
+#define EXTI_USB_OTG_FS_WAKEUP  (18)
+#define EXTI_ETH_WAKEUP         (19)
+#define EXTI_USB_OTG_HS_WAKEUP  (20)
+#define EXTI_RTC_TIMESTAMP      (21)
+#define EXTI_RTC_WAKEUP         (22)
+
+#define EXTI_NUM_VECTORS        (23)
+
+#define EXTI_MODE_INTERRUPT     (offsetof(EXTI_TypeDef, IMR))
+#define EXTI_MODE_EVENT         (offsetof(EXTI_TypeDef, EMR))
+
+#define EXTI_TRIGGER_RISING         (offsetof(EXTI_TypeDef, RTSR))
+#define EXTI_TRIGGER_FALLING        (offsetof(EXTI_TypeDef, FTSR))
+#define EXTI_TRIGGER_RISING_FALLING (EXTI_TRIGGER_RISING + EXTI_TRIGGER_FALLING)  // just different from RISING or FALLING
+
+void exti_init(void);
+
+uint exti_register(mp_obj_t pin_obj, mp_obj_t mode_obj, mp_obj_t trigger_obj, mp_obj_t callback_obj, void *param);
+
+void exti_enable(uint line);
+void exti_disable(uint line);
+void exti_swint(uint line);
+
+void Handle_EXTI_Irq(uint32_t line);
+
+typedef struct {
+  mp_obj_t callback;
+  void *param;
+} exti_t;
+
+extern const mp_obj_type_t exti_obj_type;