2024-05-20 13:32:00 +00:00
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# nRF52840 DK I<sup>2</sup>C Scanner
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Quick and simple program to scan for used I<sup>2</sup>C addresses on an
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2024-05-20 13:35:59 +00:00
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[nRF52840 DK](https://www.nordicsemi.com/Products/Development-hardware/nRF52840-DK).
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2024-05-20 13:32:00 +00:00
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# Setup
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Connect I<sup>2</sup>C as follows:
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```
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GND -> GND
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VCC -> VDD
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SDA -> P0.03
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SCL -> P0.04
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```
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## Software
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Either use [nix](https://nixos.org/download/) and enter the dev shell with
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`nix develop` or ensure that at least the following is installed:
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- [rust](https://www.rust-lang.org/learn/get-started)
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- [probe-rs](https://probe.rs/)
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Attach the dev-kit with USB, turn it on and run `probe-rs list` to verify the
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connection. It should show something akin to the following:
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```
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The following debug probes were found:
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[0]: J-Link (J-Link) (VID: 1366, PID: 1051, Serial: 001050288663, JLink)
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```
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Run `cargo run` to compile the software and flash it. The resulting output will
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tell you at which addresses I<sup>2</sup>C devices were found.
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_Example output with a device at 0x27_
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```
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0.014221 INFO i2c device at 0x27
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```
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