Added missing documentation to EXTI fields (#2)

hal/stmicro/stm32f411cc/exti.zig

@@ -59,13 +59,15 @@ const EXTI = packed struct {
         /// If 0, the interrupt request on EXTI line 18 is masked,
         /// if 1, it isn't.
         line_18: bool,
+        /// This field is reserved. DO NOT ACCESS IT!
         _reserved1: u2,
         /// If 0, the interrupt request on EXTI line 21 is masked,
         /// if 1, it isn't.
         line_21: bool,
         /// If 0, the interrupt request on EXTI line 22 is masked,
         /// if 1, it isn't.
         line_22: bool,
+        /// This field is reserved. DO NOT ACCESS IT!
         _reserved2: u9,
     },
     /// Event mask register.
@@ -127,13 +129,15 @@ const EXTI = packed struct {
         /// If 0, the event request on EXTI line 18 is masked,
         /// if 1, it isn't.
         line_18: bool,
+        /// This field is reserved. DO NOT ACCESS IT!
         _reserved1: u2,
         /// If 0, the event request on EXTI line 21 is masked,
         /// if 1, it isn't.
         line_21: bool,
         /// If 0, the event request on EXTI line 22 is masked,
         /// if 1, it isn't.
         line_22: bool,
+        /// This field is reserved. DO NOT ACCESS IT!
         _reserved2: u9,
     },
     /// Rising trigger selection register.
@@ -195,13 +199,15 @@ const EXTI = packed struct {
         /// If 0, the rising trigger for EXTI line 18 is disabled,
         /// if 1, it is enabled.
         line_18: bool,
+        /// This field is reserved. DO NOT ACCESS IT!
         _reserved1: u2,
         /// If 0, the rising trigger for EXTI line 21 is disabled,
         /// if 1, it is enabled.
         line_21: bool,
         /// If 0, the rising trigger for EXTI line 22 is disabled,
         /// if 1, it is enabled.
         line_22: bool,
+        /// This field is reserved. DO NOT ACCESS IT!
         _reserved2: u9,
     },
     /// Falling trigger selection register.
@@ -263,13 +269,15 @@ const EXTI = packed struct {
         /// If 0, the falling trigger for EXTI line 18 is disabled,
         /// if 1, it is enabled.
         line_18: bool,
+        /// This field is reserved. DO NOT ACCESS IT!
         _reserved1: u2,
         /// If 0, the falling trigger for EXTI line 21 is disabled,
         /// if 1, it is enabled.
         line_21: bool,
         /// If 0, the falling trigger for EXTI line 22 is disabled,
         /// if 1, it is enabled.
         line_22: bool,
+        /// This field is reserved. DO NOT ACCESS IT!
         _reserved2: u9,
     },
     /// Software interrupt event register.
@@ -407,6 +415,7 @@ const EXTI = packed struct {
         /// This bit is cleared indirectly when the corresponding
         /// bit in the PR register is cleared.
         line_18: bool,
+        /// This field is reserved. DO NOT ACCESS IT!
         _reserved1: u2,
         /// If this line's interrupt is enabled (corresponding bit
         /// in the IMR register is set), writing a 1 to this bit triggers
@@ -422,6 +431,7 @@ const EXTI = packed struct {
         /// This bit is cleared indirectly when the corresponding
         /// bit in the PR register is cleared.
         line_22: bool,
+        /// This field is reserved. DO NOT ACCESS IT!
         _reserved2: u9,
     },
     /// Pending interrupt register.
@@ -540,6 +550,7 @@ const EXTI = packed struct {
         ///
         /// This bit is cleared by writing a 1 to it.
         line_18: bool,
+        /// This field is reserved. DO NOT ACCESS IT!
         _reserved1: u2,
         /// If this bit is set to 0, then no events came to the
         /// EXTI line 21.
@@ -553,6 +564,7 @@ const EXTI = packed struct {
         ///
         /// This bit is cleared by writing a 1 to it.
         line_22: bool,
+        /// This field is reserved. DO NOT ACCESS IT!
         _reserved2: u9,
     },
 };