1 files changed, 6 insertions, 2 deletions
diff --git a/wirish/ext_interrupts.h b/wirish/ext_interrupts.h
index 80e2e9e..d44978a 100644
--- a/wirish/ext_interrupts.h
+++ b/wirish/ext_interrupts.h
@@ -34,7 +34,7 @@
 #define _EXT_INTERRUPTS_H_
 
 /**
- * The kind transition on an external pin which should trigger an
+ * The kind of transition on an external pin which should trigger an
  * interrupt.
  */
 typedef enum ExtIntTriggerMode_ {
@@ -56,13 +56,16 @@ extern "C"{
  *
  *  The interrupt will be triggered on a given transition on the pin,
  *  as specified by the mode parameter.  The handler runs in interrupt
- *  context.
+ *  context.  The new handler will replace whatever handler is
+ *  currently registered for the pin, if any.
  *
  *  @param pin Maple pin number
  *  @param handler Function to run upon external interrupt trigger.
+ *  The handler should take no arguments, and have void return type.
  *  @param mode Type of transition to trigger on, e.g. falling, rising, etc.
  *
  *  @sideeffect Registers a handler
+ *  @see detachInterrupt()
  */
 void attachInterrupt(uint8 pin, voidFuncPtr handler, ExtIntTriggerMode mode);
 
@@ -70,6 +73,7 @@ void attachInterrupt(uint8 pin, voidFuncPtr handler, ExtIntTriggerMode mode);
  * @brief Disable any registered external interrupt.
  * @param pin Maple pin number
  * @sideeffect unregisters external interrupt handler
+ * @see attachInterrupt()
  */
 void detachInterrupt(uint8 pin);