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Merge pull request #21 from albertskog/main

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Fix #19 - add step for memory.x
This commit is contained in:
Jorge Aparicio
2020-11-10 10:57:00 +01:00
committed by GitHub
parent b131e11257 34ac080256
commit 703c7b4bb6
1 changed files with 14 additions and 3 deletions
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README.md
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@@ -78,7 +78,7 @@ In `.cargo/config.toml`, pick the right compilation target for your board.
+target = "thumbv7em-none-eabihf" # Cortex-M4F (with FPU)
```
### 4. Add a HAL as a dependency
#### 4. Add a HAL as a dependency
In `Cargo.toml`, list the Hardware Abstraction Layer (HAL) for your board as a dependency.
@@ -95,7 +95,7 @@ For the nRF52840 you'll want to use the [`nrf52840-hal`].
#### 5. Import your HAL
Now that you have selected a HAL fix the HAL import in `src/lib.rs`
Now that you have selected a HAL, fix the HAL import in `src/lib.rs`
``` diff
// my-app/src/lib.rs
@@ -103,7 +103,18 @@ Now that you have selected a HAL fix the HAL import in `src/lib.rs`
+use nrf52840_hal as _; // memory layout
```
#### 6. run!
#### (6. Get a linker script)
Some HAL crates require that you manually copy over a file called `memory.x` from the HAL to the root of your project. For nrf52840-hal, this is done automatically so no action is needed. For other HAL crates, you can get it from your local Cargo folder, the default location is under:
```
~/.cargo/registry/src/
```
Not all HALs provide a memory.x file, you may need to write it yourself. Check the documentation for the HAL you are using.
#### 7. Run!
You are now all set to `cargo-run` your first `defmt`-powered application!
There are some examples in the `src/bin` directory.