KasperskyOS Community Edition 1.1

gpio_input example

Example use of the GPIO driver.

This example lets you verify the functionality of GPIO input pins. The "gpio0" port is used. All pins except those indicated in exceptionPinArr array are set for input by default. The voltage on the pins corresponds to the state of the registers of the pull-up resistors. The state of all pins, starting from GPIO0 (accounting for the pins indicated in the exceptionPinArr array), will be read in succession. Messages about the state of the pins will be displayed on the console. The delay between the readings of adjacent pins is determined by the DELAY_S macro (the time is indicated in seconds).

exceptionPinArr is an array of GPIO pin numbers that need to be excluded from the example. This may be necessary if some pins are already being used for other functions, e.g. if pins are being used for a UART connection during debugging.

If you build and run this example on QEMU, an error will occur. This is the expected behavior, because there is no GPIO driver for QEMU.

If you build and run this example on Raspberry Pi 4 B, an error will occur.

Example files

The code of the example and build scripts are available at the following path:

Building and running example

See Building and running examples section.