unsafe { llvm_asm!(" LDI $0, $1
LSR $0
BRCS .+2
LSR $0
BRCS .+2
BRCS .+2
1: DEC $0
NOP
BRNE 1b"
:"=d"(cnt) :"M"(reg) :: "volatile"); }
}
@cricke:matrix.org
I am pretty sure that is the wrong baud rate I think it should be -b115200
Or 57600. I am not quite sure
ok this worked
avrdude -patmega168 -carduino -P/dev/tty.usbserial-1410 -b19200 -D -Uflash:w:target/atmega168/release/rust-micro.elf:e
Can anybody compile the blink example on the latest nightly? I get the following error
[user blink]$ cargo +nightly build -Z build-std=core --target avr-atmega328p.json --release
Compiling bitflags v0.7.0
Compiling compiler_builtins v0.1.39
Compiling lazy_static v0.2.11
Compiling core v0.0.0 (/home/user/.rustup/toolchains/nightly-x86_64-unknown-linux-gnu/lib/rustlib/src/rust/library/core)
Compiling xml-rs v0.4.1
Compiling xmltree v0.4.0
Compiling avr-mcu v0.2.6
Compiling ruduino v0.2.0
Compiling rustc-std-workspace-core v1.99.0 (/home/user/.rustup/toolchains/nightly-x86_64-unknown-linux-gnu/lib/rustlib/src/rust/library/rustc-std-workspace-core)
LLVM ERROR: Not supported instr: <MCInst 258 <MCOperand Reg:1> <MCOperand Imm:15> <MCOperand Reg:45>>
error: could not compile `compiler_builtins`
To learn more, run the command again with --verbose.
warning: build failed, waiting for other jobs to finish...
error: build failed
ive been looking to do usb stuff, and until recently, i was planning to do it on an stm32, but it seems like the attiny85 is capable of usb?
it doesn't say anything about it on the datasheet, but there's this project: https://digistump.com/wiki/digispark
which suggests that its possible
Only kind of. I think it supports bit banged low speed usb. I think the relevant project is called avr vusb
i dont see anything in the avr-hal, and its not in the datasheet
and the pages ive been looking at are pretty cryptic about how it works
or maybe i just suck at reading
either way, i guess virtual low-speed usb is something that could be implemented as a crate?
also, is atmega32 one of the newer series-x chips? i havent been able to get avrxmega3 compiling on my machine
it looks like they might have been discontinued?
there arent any for sale on mouser
Yes it is confusing. Atmega8, atmega16, and atmega32 are the same series all with usb.
I don't think it's discontinued. It is used on the Arduino micro. It is quite popular among diy keyboards.
Microchip is also known to not discontinue old parts.
Microchip is also known to not discontinue old parts.
hmm yeah i guess ive never heard of a discontinued attiny/mega lol
probably just an idiosynchrasy on mouser's part
As for avr usb support in rust, it is currently lacking. I think it should be possible to implement the traits from the usb-device crate, but it is a bit of work.
Seems that someone has worked more on it than since last I looked into avr usb in rust.
I have a couple more posts up on my blog about my adventures with rust and avr: https://objectdisoriented.evokewonder.com
this time with fewer top-level dancing GIFs :P
@drmorr0: I am not sure which avr device you are working on, but if it is a tinyX, or Dx you can use https://github.com/stemnic/pyAVRdbg to debug with gdb if you have a supported debugger.
The cheapest supposed debuggers is probably a curiosity nano Dev kit or the snap debugger.
The cheapest supposed debuggers is probably a curiosity nano Dev kit or the snap debugger.
It should support most of the common debugging features such as break, single step and read and write variables.
:point_up: Edit: drmorr0 (David): I am not sure which avr device you are working on, but if it is a tinyX, or Dx you can use https://github.com/stemnic/pyAVRdbg to debug with gdb if you have a supported debugger.
The cheapest supported debuggers is probably a curiosity nano Dev kit or the snap debugger.
The cheapest supported debuggers is probably a curiosity nano Dev kit or the snap debugger.
@rahix:matrix.org oooh, that looks like what I want, thanks!
@drmorr0: ok, i guess then you are limited to print debugging or using a simulator. Just wanted to mention it in case you did use one of the supported devices.