. Mu class Suzhou University of embedded development and application of Chapter 3 Basic module .GPIO applications - Keyboard
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3 basic modules
3.4 GPIO applications - Keyboard
3.4.1 focus on classroom
3.4.2 Test job
The following basic problems are not programming keyboard is ()
A. B. encoding key recognition problem jitter problems D. C. key issue multiple bond
The correct answer: B you picked the right
14 × 5 keyboard arrangements () keys.
A.4B.8C.16D.20
The correct answer: D
2 under normal circumstances, common keyboard scanning can be obtained with a correct key
A. random scan keyboard
B. keyboard scan program idle
C. timing of scanning the keyboard
D. scanning the keyboard interrupt service routine
The correct answer: B, C, D
3 applies only to keyboard driver member KL25, KL26 series MCU.
AB
The correct answer: B
45 × 5 keyboard keys to use at least () represents bytes.
The correct answer: 2
4 The next chapter
