Rust challenge 56/100 - first steps with stm32L0 and rust
Table of content
What is this 
The rules of the game are explained in my original.
56th Challenge
Challenge
Use yesterdays preperation and run an example on things network generic node
Solution 
Lets start from a template again, same folder as yesterday.
cargo generate \
--git https://github.com/stm32-rs/stm32wlxx-hal\
--name stm32
The template, looks like this, when running tree -L 3
.
├── CHANGELOG.md
├── Cargo.lock
├── Cargo.toml
├── LICENSE-APACHE
├── LICENSE-MIT
├── README.md
├── examples
│ ├── Cargo.toml
│ ├── examples
│ └── src
├── hal
│ ├── Cargo.toml
│ └── src
├── lora-e5-bsp
│ ├── Cargo.toml
│ ├── README.md
│ └── src
├── memory.x
├── nucleo-wl55jc-bsp
│ ├── Cargo.toml
│ ├── README.md
│ └── src
├── rustfmt.toml
└── testsuite
├── Cargo.toml
├── README.md
├── runall.py
└── src
Now we need an ST-Link to flash the device. We remove the two jumpers on the Nucelo STM32L0 so we can use the ST Link on the nucleo to flash the generic node. Hooking things up is simple, just check the datasheet of the nucleo and of the generic node and connect VCC,GND, NRST, SWD CLK.
Next We try the info example to get the board info by running DEFMT_LOG=trace cargo run-ex info and the output prints some information about the board, namly its package and its UID from which some production info could be read for example.
$ DEFMT_LOG=trace cargo run-ex info
Compiling defmt-macros v0.3.2
Compiling defmt v0.3.2
Compiling panic-probe v0.3.0
Compiling defmt-rtt v0.3.2
Compiling stm32wlxx-hal v0.6.1 (/Volumes/data/4_github/learn-rust/100-rust-snippets/stm32/hal)
Compiling examples v0.1.0 (/Volumes/data/4_github/learn-rust/100-rust-snippets/stm32/examples)
Finished dev [optimized + debuginfo] target(s) in 7.09s
Running `probe-run --chip STM32WLE5JCIx --connect-under-reset target/thumbv7em-none-eabi/debug/examples/info`
(HOST) INFO flashing program (9 pages / 9.00 KiB)
(HOST) INFO success!
────────────────────────────────────────────────────────────────────────────────
Flash size: 256 KiB
└─ info::__cortex_m_rt_main @ examples/examples/info.rs:15
Package: Ok(UFQFPN48)
└─ info::__cortex_m_rt_main @ examples/examples/info.rs:16
UID64: Uid64 { uid: 3635363406995733 }
└─ info::__cortex_m_rt_main @ examples/examples/info.rs:17
UID: Uid { uid: [3080236, 1110528013, 540422710] }
└─ info::__cortex_m_rt_main @ examples/examples/info.rs:18
────────────────────────────────────────────────────────────────────────────────
(HOST) INFO device halted without error
See the repo on github. The setup looks something like the following:
