Got a very basic external interrupt to work.

1 files changed, 35 insertions, 0 deletions

diff --git a/include/arch/stm32l4xxx/peripherals/exti.h b/include/arch/stm32l4xxx/peripherals/exti.h
new file mode 100644
index 0000000..6776d10
--- /dev/null
+++ b/include/arch/stm32l4xxx/peripherals/exti.h
@@ -0,0 +1,35 @@
+#ifndef PERIPHERALS_EXTI_H_
+#define PERIPHERALS_EXTI_H_
+
+#include "arch.h"
+
+#define EXTI (*(exti_regs_t*)(EXTI_BASE))
+
+typedef struct {
+#define exti_im_n(n) (1 << (n))
+  uint32_t im_r1; /* Interrupt mask register 1. */
+
+#define exti_em_n(n) (1 << (n))
+  uint32_t em_r1; /* Event mask register 1. */
+
+#define exti_rt_n(n) (1 << (n))
+  uint32_t rts_r1; /* Rising trigger selection register 1. */
+
+#define exti_ft_n(n) (1 << (n))
+  uint32_t fts_r1; /* Falling trigger selection register 1. */
+
+#define exti_swi_n(n) (1 << (n))
+  uint32_t swie_r1; /* Software interrupt event register 1. */
+
+#define exti_pif_n(n) (1 << (n))
+  uint32_t p_r1; /* Pending register 1. */
+
+  uint32_t im_r2;   /* Interrupt mask register 2. */
+  uint32_t em_r2;   /* Event mask register 2. */
+  uint32_t rts_r2;  /* Rising trigger selection register 2. */
+  uint32_t fts_r2;  /* Falling trigger selection register 2. */
+  uint32_t swie_r2; /* Software interrupt event register 2. */
+  uint32_t p_r2;    /* Pending register 2. */
+} exti_regs_t;
+
+#endif /* PERIPHERALS_EXTI_H_ */