Updated 4X4 keypad code that works on STM32F407 and Mbed-OS-5. InterruptIn on STM32F4 MCUs seem to float without PullDown/Up, without forced PullDown the original code doesn't work on STM32F407 and most likely other STM32 MCUs as well.

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Files at revision 11:75328ab1acf4

Name Size Actions
FPointer.h 6005 Revisions Annotate
Keypad.cpp 2902 Revisions Annotate
Keypad.h 4071 Revisions Annotate