| Title: Button demo |
| |
| Description: |
| |
| A simple button demo showcasing the use of GPIO input with interrupts. |
| |
| The demo assumes that a push button is connected to one of GPIO |
| lines. The sample code is configured to work on Nucleo-64 F103RB |
| board with button B1 providing the input. |
| |
| After startup, the program looks up a predefined GPIO device (GPIOC), |
| and configures pin 13 in input mode, enabling interrupt generation on |
| falling edge. During each iteration of the main loop, the state of |
| GPIO line is monitored and printed to the serial console. When the |
| input button gets pressed, the interrupt handler will print an |
| 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: |
| |
| Problems caused by out-dated project information can be addressed by |
| issuing one of the following commands then rebuilding the project: |
| |
| make clean # discard results of previous builds |
| # but keep existing configuration info |
| or |
| make pristine # discard results of previous builds |
| # and restore pre-defined configuration info |
| |
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