42 lines
1.5 KiB
Plaintext
42 lines
1.5 KiB
Plaintext
Title: Button demo
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Description:
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A simple button demo showcasing the use of GPIO input with interrupts.
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The demo assumes that a push button is connected to one of GPIO
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lines. The sample code is configured to work on boards with user defined
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buttons and that have defined the SW0_* variable in board.h
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After startup, the program looks up a predefined GPIO device,
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and configures the pin in input mode, enabling interrupt generation on
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falling edge. During each iteration of the main loop, the state of
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GPIO line is monitored and printed to the serial console. When the
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input button gets pressed, the interrupt handler will print an
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information about this event along with its timestamp.
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Building and Running Project:
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It can be built for a nucleo_f103rb board as follows:
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make
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The code may need adaption before running the code on another board.
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Troubleshooting:
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Problems caused by out-dated project information can be addressed by
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issuing one of the following commands then rebuilding the project:
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make clean # discard results of previous builds
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# but keep existing configuration info
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or
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make pristine # discard results of previous builds
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# and restore pre-defined configuration info
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