Dion Dokter
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diondokter.nl
Dion Dokter
@diondokter.nl
520 followers 88 following 640 posts
Embedded tech lead at Tweede golf. I love programming in Rust.

Also at: @diondokter@fosstodon.org

Netherlands
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diondokter.nl
Hmmm, not sure!
Maybe check this toggle?
October 30, 2025 at 3:44 PM
diondokter.nl
This is the setup it's gonna be:
Grid in-line topology with PV inverter with a Multiplus-II GX
October 8, 2025 at 8:01 PM
diondokter.nl
When device-driver starts generating C code, which version of C should it be?

Well, it's not gonna C89 lol!

(Alt in thread)
September 26, 2025 at 8:29 PM
diondokter.nl
Cool! Happy with the playground result.

Love how instant compilation is :D
I've probably committed crimes against the web with my HTML/CSS skills, but it works :)

diondokter.github.io/device-drive...

The home page is super mega WIP, but that wait can until other more important stuff is done.
September 19, 2025 at 9:20 PM
diondokter.nl
Alright, now using webpack and the Monaco (=vscode) editor :)
Still more to do, but the general shape is there now :)
September 14, 2025 at 3:53 PM
diondokter.nl
This was surprisingly easy to get running!

Seems like I can make a device-driver playground pretty easily and serve it as a static website.

Too bad my website-making skills are subpar. But, hopefully that won't get in the way too much :P
Device-driver running in the browser. Input is hardcoded, but output appears in the browser console.
September 13, 2025 at 8:26 PM
diondokter.nl
Love it!
Git line change count: +764 -8513
August 24, 2025 at 4:01 PM
diondokter.nl
Here's an example of a register definition. This ends up generating a nice Rust api to interact with the register.

I'm also using the triple slash comments as doc comments that get forwarded to the generated Rust code.
August 19, 2025 at 8:21 AM
diondokter.nl
You don't want to reach warp 10. The captain and the pilot might just procreate with each other
Tom Paris and captain Janeway as lizards from the Voyager episode Threshold.
August 3, 2025 at 7:25 PM
diondokter.nl
What the hell are merged globals! And why is it breaking the debug info! 😡
Dwarf debug info showing a variable with a linkage name and an address NM output showing that variable doesn't have a symbol, but at the same address is a symbol called .L_MergedGlobals.1067
July 22, 2025 at 12:48 PM
diondokter.nl
Some experimentation later and a new function in the Write macro:
July 11, 2025 at 1:28 PM
diondokter.nl
Gonna be a busy weekend building a new fence. This stuff is heavy!
Fence materials Fence materials
July 9, 2025 at 5:05 PM
diondokter.nl
Heatwave came to end with a big storm! Glad I had the cats inside.

Toilet also overflowed, so guess who can go cleaning 🙃

I'm also soaked because I had to go out and unclog two drains...
July 2, 2025 at 4:07 PM
diondokter.nl
So for example, this register has multiple things wrong with it. And now we get all of the errors at the same time instead of one by one. The errors are also reported using miette, so they're extra nice!
register foo { address -1 repeat count=18_446_744_073_709_551_616 stride=1 allow-address-overlap #true reset-value 0x100 0x00 } error: Value out of range ╭─[tests\cases\device_definition_errors\input.kdl:59:16] 58 │ address -1 59 │ repeat count=18_446_744_073_709_551_616 stride=1 · ────────────────┬─────────────── · ╰── Value is out of the allowable range: 0..=2^64 60 │ allow-address-overlap #true ╰──── help: The count is encoded as a u64 error: Unexpected entries ╭─[tests\cases\device_definition_errors\input.kdl:60:31] 59 │ repeat count=18_446_744_073_709_551_616 stride=1 60 │ allow-address-overlap #true · ──┬── · ╰── This entry is unexpected 61 │ reset-value 0x100 0x00 ╰──── help: Some entries require a name, require to be anonymous or are expected to be of a certain type. Check the book to see the specification These entries may also just be superfluous. Try removing them or check other errors to see what's expected error: Value out of range ╭─[tests\cases\device_definition_errors\input.kdl:61:21] 60 │ allow-address-overlap #true 61 │ reset-value 0x100 0x00 · ──┬── · ╰── Value is out of the allowable range: 0..256 62 │ } ╰──── help: When specifying the reset values as an array, all numbers must be bytes error: Missing child node ╭─[tests\cases\device_definition_errors\input.kdl:57:14] 56 │ } 57 │ register foo { · ─┬─ · ╰── This register is missing the required `fields` node 58 │ address -1 ╰──── help: Check the book to see all required nodes
July 2, 2025 at 2:59 PM
diondokter.nl
Ugh, UI testing is hard and tedious

#rustlang #device-driver
Windows style slashes are diffed with linux style slashes
June 20, 2025 at 3:24 PM
diondokter.nl
Started adding KDL input to device-driver. I'm taking the opportunity to revamp the error reporting based on miette.
I'm also making it so it doesn't stop on the first error, but keeps going.

Preview!
June 15, 2025 at 2:48 PM
diondokter.nl
In other news, apparently my solar inverter has a modbus interface available over wifi!
Modbus registers showing the current voltage, amps, hertz and power levels
June 8, 2025 at 2:40 PM
diondokter.nl
To prove how much like XML KDL is, here's a quick translation chatgpt was able to do. Except for the comments used as description, the rest is the same.

KDL has a notable feature of 'anonymous' properties. This XML has had to give them a name.
May 31, 2025 at 5:00 PM
diondokter.nl
Hmmm yes, KDL vs YAML, same information
May 31, 2025 at 1:08 PM
diondokter.nl
This is the most 'inbetween' I think I can make it. No more config keyword, but you would have the 'fields' node in the register
May 30, 2025 at 8:23 PM
diondokter.nl
Same, but with the syntax highlighting you'd see in e.g. vscode
May 30, 2025 at 8:18 PM
diondokter.nl
Little nesting but you have to use the 'config' keyword in many places?

or

more nesting?

Which one do you prefer? I need some bikeshedding :P
device Foo { config register-address-type u8 config default-byte-order LE register Foo { config address 0x20 config repeat count=4 stride=4 config size-bits 24 value @23:0 } command Bar { config address 0x10 config size-bits-in 8 config size-bits-out 16 in { value @7:0 } out { value @15:0 } } } device Foo { register-address-type u8 default-byte-order LE objects { register Foo { address 0x20 repeat count=4 stride=4 fields size-bits=24 { value @23:0 } } command Bar { address 0x10 in size-bits=8 { value @7:0 } out size-bits=16 { value @15:0 } } } }
May 30, 2025 at 7:56 PM
diondokter.nl
Sweet, Askama PR is merged!

Pretty happy with the result. It's also net -900 LOC, which is always nice to see.
Github LOC changes
May 24, 2025 at 1:48 PM
diondokter.nl
Is (jinja-like) templating perfect?

Well no. It can get pretty messy. But it's messy in a structured way I guess.
I think this is easier to touch by a newcomer than the current quote and syn backend.
A messy looking jinja template snippet. ``` {% for method in block.methods %} {{ method.doc_attr }} {% match method.kind %} {% when BlockMethodKind::Normal %} {% when BlockMethodKind::Repeated { count, .. } %} /// Valid index range: 0..{{count}} {% endmatch %} {{ method.cfg_attr }} pub fn {{ method.name }}( &mut self, {% match method.kind %} {% when BlockMethodKind::Normal %} {% when BlockMethodKind::Repeated { .. } %} index: usize {% endmatch %} ) -> {% match method.method_type %} {% when BlockMethodType::Block { .. } %} () {% when BlockMethodType::Register { field_set_name, access, address_type, .. } %} ::device_driver::RegisterOperation<'_, I, {{address_type}}, field_sets::{{field_set_name}}, ::device_driver::{{access}}> {% when BlockMethodType::Command { .. } %} () {% when BlockMethodType::Buffer { access, address_type } %} ::device_driver::BufferOperation<'_, I, {{address_type}}, ::device_driver::{{access}}> {% endmatch %} ``` Etcetera
May 22, 2025 at 12:24 PM
diondokter.nl
🐝
A bee in a bed of white flowers
May 20, 2025 at 12:09 PM