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Quickly set up a `probe-rs` + `defmt` + `flip-link` embedded project

License: Apache License 2.0

Rust 100.00%

embedded-rust ferrous-systems

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Error in README.md

In Step 2 of the Setup has an incorrect command.
probe-rs list chips is not a valid command.
It should be probe-rs chip list instead.

Replace cargo-generate with kickstart

I think it could be better to replace cargo-generate with a similar but more powerful tool kickstart. This tool supports custom template variables. This should free the user of most of the manual actions of replacing {{variables}} that aren't supported by cargo-generate.

If it makes sense to do so, I'll be happy to make a PR for this.

Update to `defmt 0.3`

We should update the template to defmt 0.3 and release the new template at the same time as defmt.

re-enable LTO

when rust-lang/rust#90357 is fixed on stable

`.github/FUNDING.yml` is still included in generated projects

Adding it to cargo-generate.toml's exclude list only means that placeholders inside of it won't be expanded. Instead, we apparently need to create a .genignore and add it there (as per https://github.com/ashleygwilliams/cargo-generate#templates).

move documentation to this repo

right now the setup steps live in https://ferrous-systems.com/blog/defmt/#setup but they should be moved into this repo (README). That way we can keep them updated and also make them easier to find

Use opt-level=z again

This was removed in #2 to work around a rustc bug. It should be restored once that bug is fixed and in stable.

failed to load bc of ...

Hi. Does anyone know what could cause this? Have been using probe-run for a while; got this error on modifying project to be like the template, using defmt and flip-link. Thank you.

warning: Linking globals named '_SEGGER_RTT': symbol multiply defined!

error: failed to load bc of "defmt_rtt-744a0a5cfb69d4e1.defmt_rtt.awuu50kv-cgu.0.rcgu.o":

error: aborting due to previous error; 34 warnings emitted

I'm using Windows.

Cannot find linker script memory.x

Hi! I'm trying out this template on a Bluepill board with STM32F103C8 and stm32f1xx-hal. After following the setup steps (and working around #18) I get a linker error about missing memory.x when running cargo rb hello.

Copying memory.x from the HAL's repository into the root of the project as suggested by their readme solves the problem.
https://github.com/stm32-rs/stm32f1xx-hal/blob/master/memory.x

Is this expected to be part of step 5 ("5. Import your HAL")? I could make a PR on the readme but I'm not sure if this works differently for other HAL's?

error[E0463]: can't find crate for `test`

Have been trying to retrofit defmt::test to a library. Ran into issues, thought I'd better start with something working
Ran through the readme instructions (cargo rb hello builds and runs)
cargo test just complains about "can't find crate test`

Other than readme instructions for device specific bits, no modifications have been made

installed cargo tools

risc-v support

I'm getting linking errors during cargo build --bin hello

error: linking with `rust-lld` failed: exit code: 1
  |
  = note: "rust-lld" "-flavor" "gnu" "-L" "/home/dkhayes117/.rustup/toolchains/beta-x86_64-unknown-linux-gnu/lib/rustlib/riscv32imac-unknown-none-elf/lib" "/home/dkhayes117/IdeaProjects/defmt_test/target/riscv32imac-unknown-none-elf/debug/deps/hello-a9b45fbc99b62350.hello.1n7pvg5w-cgu.0.rcgu.o" "-o" "/home/dkhayes117/IdeaProjects/defmt_test/target/riscv32imac-unknown-none-elf/debug/deps/hello-a9b45fbc99b62350" "--gc-sections" "-L" "/home/dkhayes117/IdeaProjects/defmt_test/target/riscv32imac-unknown-none-elf/debug/deps" "-L" "/home/dkhayes117/IdeaProjects/defmt_test/target/debug/deps" "-L" "/home/dkhayes117/IdeaProjects/defmt_test/target/riscv32imac-unknown-none-elf/debug/build/defmt-786b78cb5fb56c90/out" "-L" "/home/dkhayes117/IdeaProjects/defmt_test/target/riscv32imac-unknown-none-elf/debug/build/hifive1-12e6de30a7c42179/out" "-L" "/home/dkhayes117/IdeaProjects/defmt_test/target/riscv32imac-unknown-none-elf/debug/build/e310x-c9d6b8bcdebcec36/out" "-L" "/home/dkhayes117/IdeaProjects/defmt_test/target/riscv32imac-unknown-none-elf/debug/build/riscv-b96e58c41469ec83/out" "-L" "/home/dkhayes117/IdeaProjects/defmt_test/target/riscv32imac-unknown-none-elf/debug/build/riscv-rt-7fa43864cbb5bfaa/out" "-L" "/home/dkhayes117/IdeaProjects/defmt_test/target/riscv32imac-unknown-none-elf/debug/build/riscv-rt-7fa43864cbb5bfaa/out" "-L" "/home/dkhayes117/.rustup/toolchains/beta-x86_64-unknown-linux-gnu/lib/rustlib/riscv32imac-unknown-none-elf/lib" "--start-group" "-Bstatic" "/tmp/rustcQiAIxg/libriscv_rt-c7d2a202c972997c.rlib" "/tmp/rustcQiAIxg/libriscv-6fb334952367127a.rlib" "--end-group" "/home/dkhayes117/.rustup/toolchains/beta-x86_64-unknown-linux-gnu/lib/rustlib/riscv32imac-unknown-none-elf/lib/libcompiler_builtins-c1fdd1f60c58bc16.rlib" "-Bdynamic"
  = note: rust-lld: error: undefined symbol: _mp_hook
          >>> referenced by lib.rs:301 (/home/dkhayes117/.cargo/registry/src/github.com-1ecc6299db9ec823/riscv-rt-0.6.2/src/lib.rs:301)
          >>>               /home/dkhayes117/IdeaProjects/defmt_test/target/riscv32imac-unknown-none-elf/debug/deps/hello-a9b45fbc99b62350.hello.1n7pvg5w-cgu.0.rcgu.o:(_start_rust)
          
          rust-lld: error: undefined symbol: __pre_init
          >>> referenced by lib.rs:302 (/home/dkhayes117/.cargo/registry/src/github.com-1ecc6299db9ec823/riscv-rt-0.6.2/src/lib.rs:302)
          >>>               /home/dkhayes117/IdeaProjects/defmt_test/target/riscv32imac-unknown-none-elf/debug/deps/hello-a9b45fbc99b62350.hello.1n7pvg5w-cgu.0.rcgu.o:(_start_rust)
          
          rust-lld: error: undefined symbol: _sbss
          >>> referenced by lib.rs:302 (/home/dkhayes117/.cargo/registry/src/github.com-1ecc6299db9ec823/riscv-rt-0.6.2/src/lib.rs:302)
          >>>               /home/dkhayes117/IdeaProjects/defmt_test/target/riscv32imac-unknown-none-elf/debug/deps/hello-a9b45fbc99b62350.hello.1n7pvg5w-cgu.0.rcgu.o:(_start_rust)
          >>> referenced by lib.rs:302 (/home/dkhayes117/.cargo/registry/src/github.com-1ecc6299db9ec823/riscv-rt-0.6.2/src/lib.rs:302)
          >>>               /home/dkhayes117/IdeaProjects/defmt_test/target/riscv32imac-unknown-none-elf/debug/deps/hello-a9b45fbc99b62350.hello.1n7pvg5w-cgu.0.rcgu.o:(_start_rust)
          
          rust-lld: error: undefined symbol: _ebss
          >>> referenced by lib.rs:302 (/home/dkhayes117/.cargo/registry/src/github.com-1ecc6299db9ec823/riscv-rt-0.6.2/src/lib.rs:302)
          >>>               /home/dkhayes117/IdeaProjects/defmt_test/target/riscv32imac-unknown-none-elf/debug/deps/hello-a9b45fbc99b62350.hello.1n7pvg5w-cgu.0.rcgu.o:(_start_rust)
          >>> referenced by lib.rs:302 (/home/dkhayes117/.cargo/registry/src/github.com-1ecc6299db9ec823/riscv-rt-0.6.2/src/lib.rs:302)
          >>>               /home/dkhayes117/IdeaProjects/defmt_test/target/riscv32imac-unknown-none-elf/debug/deps/hello-a9b45fbc99b62350.hello.1n7pvg5w-cgu.0.rcgu.o:(_start_rust)
          
          rust-lld: error: undefined symbol: _sdata
          >>> referenced by lib.rs:0 (/home/dkhayes117/.cargo/registry/src/github.com-1ecc6299db9ec823/r0-0.2.2/src/lib.rs:0)
          >>>               /home/dkhayes117/IdeaProjects/defmt_test/target/riscv32imac-unknown-none-elf/debug/deps/hello-a9b45fbc99b62350.hello.1n7pvg5w-cgu.0.rcgu.o:(_start_rust)
          >>> referenced by lib.rs:0 (/home/dkhayes117/.cargo/registry/src/github.com-1ecc6299db9ec823/r0-0.2.2/src/lib.rs:0)
          >>>               /home/dkhayes117/IdeaProjects/defmt_test/target/riscv32imac-unknown-none-elf/debug/deps/hello-a9b45fbc99b62350.hello.1n7pvg5w-cgu.0.rcgu.o:(_start_rust)
          
          rust-lld: error: undefined symbol: _sidata
          >>> referenced by lib.rs:0 (/home/dkhayes117/.cargo/registry/src/github.com-1ecc6299db9ec823/r0-0.2.2/src/lib.rs:0)
          >>>               /home/dkhayes117/IdeaProjects/defmt_test/target/riscv32imac-unknown-none-elf/debug/deps/hello-a9b45fbc99b62350.hello.1n7pvg5w-cgu.0.rcgu.o:(_start_rust)
          >>> referenced by lib.rs:0 (/home/dkhayes117/.cargo/registry/src/github.com-1ecc6299db9ec823/r0-0.2.2/src/lib.rs:0)
          >>>               /home/dkhayes117/IdeaProjects/defmt_test/target/riscv32imac-unknown-none-elf/debug/deps/hello-a9b45fbc99b62350.hello.1n7pvg5w-cgu.0.rcgu.o:(_start_rust)
          
          rust-lld: error: undefined symbol: trap_handler
          >>> referenced by lib.rs:329 (/home/dkhayes117/.cargo/registry/src/github.com-1ecc6299db9ec823/riscv-rt-0.6.2/src/lib.rs:329)
          >>>               /home/dkhayes117/IdeaProjects/defmt_test/target/riscv32imac-unknown-none-elf/debug/deps/hello-a9b45fbc99b62350.hello.1n7pvg5w-cgu.0.rcgu.o:(_start_trap_rust)
          
          rust-lld: error: undefined symbol: _max_hart_id
          >>> referenced by riscv-rt.o:(.init+0x52) in archive /tmp/rustcQiAIxg/libriscv_rt-c7d2a202c972997c.rlib
          >>> referenced by riscv-rt.o:(.init+0x56) in archive /tmp/rustcQiAIxg/libriscv_rt-c7d2a202c972997c.rlib
          
          rust-lld: error: undefined symbol: _stack_start
          >>> referenced by riscv-rt.o:(.init+0x5E) in archive /tmp/rustcQiAIxg/libriscv_rt-c7d2a202c972997c.rlib
          
          rust-lld: error: undefined symbol: _hart_stack_size
          >>> referenced by riscv-rt.o:(.init+0x66) in archive /tmp/rustcQiAIxg/libriscv_rt-c7d2a202c972997c.rlib
          >>> referenced by riscv-rt.o:(.init+0x6A) in archive /tmp/rustcQiAIxg/libriscv_rt-c7d2a202c972997c.rlib
          

error: aborting due to previous error

error: could not compile `defmt_test`.

To learn more, run the command again with --verbose.

Linked blog post has security issues

semihosting on the "blue pill" board

Hello knurling-rs,

I can't seem to get semihosting to work with the app-template and my STM32F103C8T6 "blue pill" board. I'm using VSCode and the "Debugger for probe-rs" behind an STLink V2:

$ probe-rs list
The following debug probes were found:
[0]: STLink V2 (VID: 0483, PID: 3748, Serial: [...], StLink)

$ probe-rs info
Probing target via JTAG

ARM Chip:
Debug Port: Version 1, DP Designer: ARM Ltd
└── 0 MemoryAP
    └── ROM Table (Class 1)
        ├── Cortex-M3 SCS   (Generic IP component)
        │   └── CPUID
        │       ├── IMPLEMENTER: ARM Ltd
        │       ├── VARIANT: 1
        │       ├── PARTNO: 3107
        │       └── REVISION: 1
        ├── Cortex-M3 DWT   (Generic IP component)
        ├── Cortex-M3 FBP   (Generic IP component)
        ├── Cortex-M3 ITM   (Generic IP component)
        └── Cortex-M3 TPIU  (Coresight Component)

[...]

Now, whenever I start debugging anything, I end up in line 212 of cortex-m-semihosting/src/lib.rs, indicative of a failed semihosting attempt.

In a more "bare" setup (without knurling-rs, using the "Cortex-Debug" VSC extension and a manually setup "cargo build" prelaunch task) I was able to resolve the same issue leveraging "preLaunchCommands" for the gdb process, i.e. "monitor arm semihosting enable". I can't seem to find a similar setting with the arguably better approach using probe-rs and knurling.

I've selfhosted both experimental projects in my gitea instance and added a containers.dev config for convenience.

With knurling + probe-rs (failed semihosting): https://code.yavook.de/jmm/bluepill-knurling-rs
With manual setup + Cortex-Debug: https://code.yavook.de/jmm/bluepill-rust-blinky/src/commit/4132b45631b65d326b8f4ad85acfbc752b64c18a

Any ideas forward?

Crossposted at probe-rs/vscode/issues/89

vscode error `can't find crate for `test``

Hi. After I used app-template to generate a project and opened it with vscode, the rust extension emitted an error can't find crate for test. Could you tell me how to avoid this.

Max number of RTT attach retries exceeded

I followed the defmt setup guide from this post and finished the todos. However I get the following when running the hello example. The repo is here: https://github.com/hamptokr/voltron-testing

  (HOST) INFO  flashing program
  (HOST) INFO  success!
────────────────────────────────────────────────────────────────────────────────
  (HOST) ERROR Max number of RTT attach retries exceeded.
Error: RTT control block not found in target memory. Make sure RTT is initialized on the target.

Here are some versions of things I am using

cargo 1.46.0 (149022b1d 2020-07-17)
rustc 1.46.0 (04488afe3 2020-08-24)
stm32f4xx-hal = { version = "0.8.3", features = ["rt", "stm32f429"] }
probe-run 0.1.3 (from master branch)

defmt error trying to install as per instructions

I tried to do the following:

 cargo install \
    --git https://github.com/knurling-rs/probe-run \
    --branch main \
    --features defmt --force
cargo install cargo-generate --force
cargo install flip-link --force
cargo generate \
    --git https://github.com/knurling-rs/app-template \
    --branch main \
    --name knurling-template

I then performed the edits suggested from the README.md file: https://github.com/knurling-rs/app-template

and when I do:

cargo run --bin hello

I get the following error:

     Running `probe-run --chip nRF52840_xxAA --defmt target/thumbv7em-none-eabihf/debug/hello`
Error: defmt version mismatch (firmware is using 148009e3bb1d99b5a1938a1a816ad0b0b6423aeb, host is using 28c1afb4d3bad747ef47737a83f5c8b13928cb8a); are you using the same git version of defmt and related tools?
Try `cargo install`-ing the latest git version of `probe-run` AND updating your project's `Cargo.lock` with `cargo update`

I even did cargo uninstall probe-run and reran the install command above with no change.

We are on vacation ⛄

Dear Knurling-rs community,

Most of us maintainers of Knurling-rs will be on vacation from this week until the beginning of January. Therefore please do not expect too much activity in our repositories and issue tracker.

We wish you a great holiday season (if you have it) or, otherwise, just a good time.

Best, your Knurling-rs team ❄️

bump all dependencies to v0.2.0 in the template

also worth noting that v0.2.0 of probe-run must be used
perhaps delete the next branch after that

Print-defmt feature results into linker error

The print-defmt feature, which is enabled by default here:

app-template/testsuite/Cargo.toml

Line 25 in b131e11

features = ["print-defmt"]

is not enabled in the root Cargo.toml

app-template/Cargo.toml

Lines 19 to 21 in b131e11

 [dependencies.panic-probe] 

 git = "https://github.com/knurling-rs/probe-run" 

 branch = "main"

which results into this linker error on my machine, when envoking cargo test -p testsuite:

  Updating git repository `https://github.com/knurling-rs/defmt.git`
   Compiling testsuite v0.1.0 (/home/fabian/Projects/probe-rs-test/testsuite)
error: linking with `rust-lld` failed: exit code: 1
  |
  = note: "rust-lld" "-flavor" "gnu" "--eh-frame-hdr" "-L" "/home/fabian/.rustup/toolchains/stable-x86_64-unknown-linux-gnu/lib/rustlib/thumbv7em-none-eabihf/lib" "/home/fabian/Projects/probe-rs-test/target/thumbv7em-none-eabihf/debug/deps/test-daf5c426a107f9de.3f85ep5l4tmq4cjz.rcgu.o" "-o" "/home/fabian/Projects/probe-rs-test/target/thumbv7em-none-eabihf/debug/deps/test-daf5c426a107f9de" "--gc-sections" "-L" "/home/fabian/Projects/probe-rs-test/target/thumbv7em-none-eabihf/debug/deps" "-L" "/home/fabian/Projects/probe-rs-test/target/debug/deps" "-L" "/home/fabian/Projects/probe-rs-test/target/thumbv7em-none-eabihf/debug/build/cortex-m-9e8e16258a49aff5/out" "-L" "/home/fabian/Projects/probe-rs-test/target/thumbv7em-none-eabihf/debug/build/cortex-m-rt-de80db1368e4e709/out" "-L" "/home/fabian/Projects/probe-rs-test/target/thumbv7em-none-eabihf/debug/build/defmt-63ffe4a8f615f792/out" "-L" "/home/fabian/Projects/probe-rs-test/target/thumbv7em-none-eabihf/debug/build/defmt-9193441bd5229fe0/out" "-L" "/home/fabian/Projects/probe-rs-test/target/thumbv7em-none-eabihf/debug/build/stm32f3-79ff9fbfd025df4d/out" "-L" "/home/fabian/.rustup/toolchains/stable-x86_64-unknown-linux-gnu/lib/rustlib/thumbv7em-none-eabihf/lib" "-Bstatic" "/home/fabian/Projects/probe-rs-test/target/thumbv7em-none-eabihf/debug/deps/libprobe_rs_test-fc8a21b9535a2bb9.rlib" "/home/fabian/Projects/probe-rs-test/target/thumbv7em-none-eabihf/debug/deps/libstm32f3xx_hal-969d10ed50bf8cb0.rlib" "/home/fabian/Projects/probe-rs-test/target/thumbv7em-none-eabihf/debug/deps/libheapless-937b344ffad95b46.rlib" "/home/fabian/Projects/probe-rs-test/target/thumbv7em-none-eabihf/debug/deps/libhash32-43140fd7893bf3c5.rlib" "/home/fabian/Projects/probe-rs-test/target/thumbv7em-none-eabihf/debug/deps/libbyteorder-6fad586717fa02c4.rlib" "/home/fabian/Projects/probe-rs-test/target/thumbv7em-none-eabihf/debug/deps/libembedded_hal_can-87549cd3a05caaee.rlib" "/home/fabian/Projects/probe-rs-test/target/thumbv7em-none-eabihf/debug/deps/libstm32_usbd-86e8030cdc26258d.rlib" "/home/fabian/Projects/probe-rs-test/target/thumbv7em-none-eabihf/debug/deps/libusb_device-b72e166c77966672.rlib" "/home/fabian/Projects/probe-rs-test/target/thumbv7em-none-eabihf/debug/deps/libcfg_if-90796c704deea078.rlib" "/home/fabian/Projects/probe-rs-test/target/thumbv7em-none-eabihf/debug/deps/librtcc-9eb407e85b02babd.rlib" "/home/fabian/Projects/probe-rs-test/target/thumbv7em-none-eabihf/debug/deps/libchrono-a670157da5d0ae28.rlib" "/home/fabian/Projects/probe-rs-test/target/thumbv7em-none-eabihf/debug/deps/libnum_integer-c618218e6106f58c.rlib" "/home/fabian/Projects/probe-rs-test/target/thumbv7em-none-eabihf/debug/deps/libnum_traits-13c286d7d20ca587.rlib" "/home/fabian/Projects/probe-rs-test/target/thumbv7em-none-eabihf/debug/deps/libembedded_dma-dcfaf13f8f551ee0.rlib" "/home/fabian/Projects/probe-rs-test/target/thumbv7em-none-eabihf/debug/deps/libcast-44574ff949e37aae.rlib" "/home/fabian/Projects/probe-rs-test/target/thumbv7em-none-eabihf/debug/deps/libstm32f3-68ec9081389bd82f.rlib" "/home/fabian/Projects/probe-rs-test/target/thumbv7em-none-eabihf/debug/deps/libembedded_hal-f7e699ffe96e3c2e.rlib" "/home/fabian/Projects/probe-rs-test/target/thumbv7em-none-eabihf/debug/deps/libvoid-6f3bc16521189212.rlib" "/home/fabian/Projects/probe-rs-test/target/thumbv7em-none-eabihf/debug/deps/libnb-47a67e8f2360fe58.rlib" "/home/fabian/Projects/probe-rs-test/target/thumbv7em-none-eabihf/debug/deps/libnb-5a5434ccd7996659.rlib" "--start-group" "/home/fabian/Projects/probe-rs-test/target/thumbv7em-none-eabihf/debug/deps/libpanic_probe-79dd64c85d461f83.rlib" "/home/fabian/Projects/probe-rs-test/target/thumbv7em-none-eabihf/debug/deps/libdefmt-875d097bce3c0ced.rlib" "/home/fabian/Projects/probe-rs-test/target/thumbv7em-none-eabihf/debug/deps/libdefmt_common-ff5cd0653fae5eee.rlib" "/home/fabian/Projects/probe-rs-test/target/thumbv7em-none-eabihf/debug/deps/libdefmt_rtt-c5ca225d2c9d8903.rlib" "/home/fabian/Projects/probe-rs-test/target/thumbv7em-none-eabihf/debug/deps/libdefmt-15d46e343b789076.rlib" "/home/fabian/Projects/probe-rs-test/target/thumbv7em-none-eabihf/debug/deps/libcortex_m-0eb7bb1de769cc23.rlib" "/home/fabian/Projects/probe-rs-test/target/thumbv7em-none-eabihf/debug/deps/libvolatile_register-b6339df8b54634ba.rlib" "/home/fabian/Projects/probe-rs-test/target/thumbv7em-none-eabihf/debug/deps/libvcell-9695512adac47d45.rlib" "/home/fabian/Projects/probe-rs-test/target/thumbv7em-none-eabihf/debug/deps/libbare_metal-b5b81c0dc4b2d60b.rlib" "/home/fabian/Projects/probe-rs-test/target/thumbv7em-none-eabihf/debug/deps/libaligned-75df737b2ac89ff7.rlib" "/home/fabian/Projects/probe-rs-test/target/thumbv7em-none-eabihf/debug/deps/libas_slice-5fd1956ac6d2cddc.rlib" "/home/fabian/Projects/probe-rs-test/target/thumbv7em-none-eabihf/debug/deps/libstable_deref_trait-fcdcb203a2b90bb3.rlib" "/home/fabian/Projects/probe-rs-test/target/thumbv7em-none-eabihf/debug/deps/libgeneric_array-fda4f9a3eb1be905.rlib" "/home/fabian/Projects/probe-rs-test/target/thumbv7em-none-eabihf/debug/deps/libgeneric_array-25409c8c76176d2e.rlib" "/home/fabian/Projects/probe-rs-test/target/thumbv7em-none-eabihf/debug/deps/libgeneric_array-02caaeed88b43efc.rlib" "/home/fabian/Projects/probe-rs-test/target/thumbv7em-none-eabihf/debug/deps/libtypenum-94045a785496a94d.rlib" "/home/fabian/Projects/probe-rs-test/target/thumbv7em-none-eabihf/debug/deps/libcortex_m_rt-148379300858178c.rlib" "/home/fabian/Projects/probe-rs-test/target/thumbv7em-none-eabihf/debug/deps/libr0-31ea11b2b4afebea.rlib" "/home/fabian/.rustup/toolchains/stable-x86_64-unknown-linux-gnu/lib/rustlib/thumbv7em-none-eabihf/lib/librustc_std_workspace_core-cd2885036a83a85f.rlib" "/home/fabian/.rustup/toolchains/stable-x86_64-unknown-linux-gnu/lib/rustlib/thumbv7em-none-eabihf/lib/libcore-638f4f8c5b5e5844.rlib" "--end-group" "/home/fabian/.rustup/toolchains/stable-x86_64-unknown-linux-gnu/lib/rustlib/thumbv7em-none-eabihf/lib/libcompiler_builtins-93db0b79f9e8c6f2.rlib" "-Tlink.x" "-Tdefmt.x" "-Bdynamic"
  = note: rust-lld: error: duplicate symbol: __defmt_default_timestamp
          >>> defined at lib.rs:444 (/home/fabian/.cargo/git/checkouts/defmt-7f5b74b4e6ff55d4/be7f4a7/src/lib.rs:444)
          >>>            defmt-875d097bce3c0ced.defmt.m7gzhem3-cgu.0.rcgu.o:(__defmt_default_timestamp) in archive /home/fabian/Projects/probe-rs-test/target/thumbv7em-none-eabihf/debug/deps/libdefmt-875d097bce3c0ced.rlib
          >>> defined at lib.rs:442 (/home/fabian/.cargo/git/checkouts/defmt-7f5b74b4e6ff55d4/77bef85/src/lib.rs:442)
          >>>            defmt-15d46e343b789076.defmt.1dquk1wd-cgu.0.rcgu.o:(.text.__defmt_default_timestamp+0x1) in archive /home/fabian/Projects/probe-rs-test/target/thumbv7em-none-eabihf/debug/deps/libdefmt-15d46e343b789076.rlib

Removing or disabling the print-defmt feature resolves the issue.

Hard fault crash after 1-2 minutes of running

I've written a simple button application based on the app-template. However, after some time of firmware being run on the STM32F027B-DISCO board, it stopped. I started to dig in and found HardFault occurred. The breakpoint in the HardFault handler in lib.rs never hit even if I press Run after the automatic stop caused by the debugger.
The repo: https://github.com/itxs/embedded_rust_learning
The screenshot of an issue:

Cannot build with nrf51-hal

When I try to build for nrf51822 (cortex-m0) with nrf-51-hal crate the build never ends.

Steps to reproduce:

rustup target add thumbv6m-none-eabi
cargo generate --git https://github.com/knurling-rs/app-template --branch main --name my-app
Add nrf51-hal = "0.14" to Cargo.toml dependencies
cargo build

cargo build output:
Compiling proc-macro2 v1.0.34
Compiling unicode-xid v0.2.2
Compiling syn v1.0.82
Compiling semver-parser v0.7.0
Compiling cortex-m v0.7.3
Compiling version_check v0.9.3
Compiling nb v1.0.0
Compiling vcell v0.1.3
Compiling void v1.0.2
Compiling cortex-m-rt v0.7.1
Compiling bitfield v0.13.2
Compiling defmt v0.3.0
Compiling az v1.2.0
Compiling typenum v1.14.0
Compiling defmt-macros v0.3.1
Compiling fixed v1.11.0
Compiling nrf51-pac v0.10.1
Compiling defmt-parser v0.3.0
Compiling half v1.8.2
Compiling stable_deref_trait v1.2.0
Compiling bitflags v1.3.2
Compiling nrf-hal-common v0.14.0
Compiling bytemuck v1.7.3
Compiling cast v0.3.0
Compiling rand_core v0.6.3
Compiling cfg-if v1.0.0
Compiling defmt-rtt v0.3.1
Compiling panic-probe v0.3.0
Compiling nrf51-hal v0.14.0
Compiling embedded-storage v0.2.0
Compiling volatile-register v0.2.1
Compiling nb v0.1.3
Compiling semver v0.9.0
Compiling embedded-dma v0.1.2
Compiling proc-macro-error-attr v1.0.4
Compiling proc-macro-error v1.0.4
Compiling embedded-hal v0.2.6
Compiling rustc_version v0.2.3
Compiling bare-metal v0.2.5
Compiling quote v1.0.10
Compiling cortex-m-rt-macros v0.7.0
Compiling my-app v0.1.0 (/home/honza/tmp/my-app)
Building [=======================> ] 75/82: fixed

In readme flip-link CI patch link is broken.

This is in readme and returns 404: https://github.com/knurling-rs/flip-link/blob/main/.github/workflows/0001-configure-test-flip-link-app-for-nrf52840.patch

	[dependencies.panic-probe]
	git = "https://github.com/knurling-rs/probe-run"
	branch = "main"

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