Add note that NVIC::request is not available on armv6m
@@ -84,6 +84,8 @@ impl NVIC {
/// Writing a value to the INTID field is the same as manually pending an interrupt by setting
/// the corresponding interrupt bit in an Interrupt Set Pending Register. This is similar to
/// `set_pending`.
+ ///
+ /// This method is not available on ARMv6-M chips.
pub fn request<I>(&mut self, interrupt: I)
where
I: Nr,
