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2018-12-09 16:50:22 -05:00 · 2018-12-09 16:50:22 -05:00 · c6a25f7286
parent 69b12f31b8
commit c6a25f7286
1 changed files with 2 additions and 1 deletions
--- a/firmware/hw_layer/joystick.cpp
+++ b/firmware/hw_layer/joystick.cpp
@ -5,7 +5,8 @@
 * See void onJoystick(joystick_button_e button)
 *
 * TODO: separate EXTI layer from joystick logic
- * TODO: spell out the limitations of EXTI, can we use multiple pins with same index?
+ * You cannot use two pins with same index for EXTI (for instance PA5 and PE5) since these would
+ * be using same EXTI line. See https://stm32f4-discovery.net/2014/08/stm32f4-external-interrupts-tutorial/
 * See also comments in digital_input_hw.cpp
 *
 * @date Jan 2, 2015