mirror of
https://github.com/ferrous-systems/embedded-trainings-2020.git
synced 2024-06-26 09:00:35 +00:00
20 lines
1.1 KiB
Markdown
20 lines
1.1 KiB
Markdown
|
# PAC Exercise
|
||
|
|
|
||
|
|
In this exercise you will generate a PAC (Peripheral Access Crate) from an svd file.
|
||
|
|
|
||
|
|
Install `svd2rust` via cargo
|
||
|
|
Download https://github.com/NordicSemiconductor/nrfx/blob/master/mdk/nrf52.svd (or some tagged version)
|
||
|
|
|
||
|
|
Run svd2rust with the SVD file to generate a PAC using the `cortex-m` flag
|
||
|
|
Notice how it's one long line of text in the source file. (mine is clean?!)
|
||
|
|
Look at the PAC docs with cargo doc --open. (this needs a cargo.toml, make one yourself??, what do we want folks to see?)
|
||
|
|
cargo fmt the crate. No change to the docs, but a bit more readable.
|
||
|
|
cargo install form, use form to process the one-big-file into one-file-per-module.
|
||
|
|
form -i src/lib.rs -o src/ Re-run cargo fmt.
|
||
|
|
Find the definition of the ENABLE register for UARTE0, in the PDF datasheet and in the SVD file, and in the svd2rust generated code.
|
||
|
|
Write a simple program which uses the PAC to enable the UART. See how writing arbitrary values to the ENABLE field in the ENABLE register is unsafe, because only values 0 or 8 should be used.
|
||
|
|
|
||
|
|
base address Uarte0 0x40002000
|
||
|
|
enable UARTE 0x500
|
||
|
|
|
||
|
|
add pac to cargo.toml
|