RIOT-OS/RIOT
RIOT-OS/RIOT
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RIOT/tests/periph/uart_locate_pins/README.md

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tests/periph/uart_locate_pins: new test/utility app This application uses `soft_uart` to bit-bang the name of a number of configured GPIO pins via said pins at 9600 Bd. This way attaching an USB UART bridge to one pin at a time easily reveals which MCU GPIO pin a given pin on a board corresponds to. This is useful when no schematic and no silkscreen labeling is available, or when the information is misleading or outright incorrect (looking at the E180-ZG120B-TB).
2024-01-14 17:15:19 +01:00
# Utility to locate GPIO pins
This application bit-bangs the name of every GPIO pin via `soft_uart` on each
GPIO. Connect an UART adapter to one pin at a time configured at symbol rate
of 9600 Bd and check the output to know which pin you are connected to.
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