The Rust language now has AVR support baked in. Rust isn’t quite C# but it has lots of developer experience things that are missing in C, supposedly without any performance trade offs.
It looks like it supports loads of ATTiny at ATMega CPUs avrd - Rust
Do you have any information about how size-efficient are AVR binaries written in Rust compared to C ones? Because it’s a major limitation…
I can’t find any information on it and I haven’t tried myself. On x86 CPUs Rust binaries are often bigger than C or C.
Would be interesting to try porting FSM to Rust, just to see. There’s automated tools like Porting Code · A Guide to Porting C and C++ code to Rust but it looks like they wouldn’t be as good as porting it manually.
This is a different case. Rust binaries are statically linked which makes them comparatively very large.
But in the embedded space everything is statically linked, so no difference here.
On the other hand is LLVM as good as gcc in optimizing for size? I played with that years ago on a different target and it was not. But this experience may not be relevant now.
Also, how does the higher level nature of rust lend itself to space optimizations? It works well for performance which is a good sign. But it is not a certainty.
BTW, modern MCUs tend to have much more flash. So dropping compatibility with older lights (as well as many modern ones that still use older MCUs) would make things much easier. I don’t expect our greatest firmware developers to go this way any time soon but I wouldn’t surprised to see someone else experimenting with Rust either.
Please help me make things clear with branches. I’m really not familiar with launchpad. What is the difference between lp:flashlight-firmware and lp:~toykeeper/flashlight-firmware/fsm. Second one seems newer, so I assume I should use this branch to get latest Andruil?
Yes, fsm is the main development branch. You can also try anduril2, the next version of Anduril.
Is there an Anduril version that uses only the FET and no 7135’s? I would need one for 6V and 12V drivers.
You can use any single channel config (often “nofet”) and use the corresponding pin.
Please help. I tried to flash an fw3a driver with narsil and got this error… “Event not declared”
Cannot see the picture. Have you modified narsil to run on the driver?
I’m a numpty so I didn’t realise narsil needs to be modified to work on this driver. It’s the pic visible now?
It is. I highly doubt that you can compile and flash Anduril or Narsil with the Arduino IDE. 
You’ll need comman line avr-gcc and avrdude for compiling and flashing. There are several tutorials how to do it.
Does Narsil work with three channels? Does the pinout match?
Damit this stuff is way too complicated for me. I can’t even get the name right. It was andruil.c from toykeepers launchpad. I just tried with command prompt / avrdude and i get a file directory error. I appreciate your willingness to help SammysHP but this is already irritating the c^@p out of me
I don’t know if I’m a step closer but in command prompt i got the directory sorted but the hex file cannot be opened or read
Have you got it to compile? How does the command prompt look when you run the build-all script?
I finally got it to flash. It turns out the directory was the issue. I moved the hex file and it worked fine 
Now that i got it to work (once at least 
) i need to learn how to modify the hex file 
Thank you SammysHP. To change the pin you need to modify the file, right? I was hoping for a complete hex file. Maybe I will need to figure out how to create a hex file myself. Last time I tried it just showed me a bunch of errors.
No, just use the FET on the 7135 pin of the MCU.
I have flashed drivers in the past. But after 2 computer crashes and many motorcycle crashes I can’t seam to put it all together again.
I have used ToyKeepers README file.
I believe I have downloaded all the necessary files to my HOME folder.
I have connected with an Attiny85.
After compiling an untouched rampingiosv3.c just to test.
I get 6 pages of errors.
Basically a few #warning “device type not defined and #error Requested EEPROM_BYTES too big
then about 5 pages of undeclared and implicit declaration.
I believe I am missing a library, or don’t have library in path.
Linux or Windows? I’m guessing Linux since you referenced a Home folder. If Linux, are you using the “build-all.sh” script or are you trying to build a single config? When downloading the files, did you maintain all of the folder structures? If not and you just stuck all of the files in the same folder, you’d need to fix the directories for all of the #includes.
