Setup defmt and probe run (#58)

* Update dependencies for using defmt/probe-run

Setup probe-run configuration for easier running of examples

Update vscode settings for rust analyzer

Add panic example for testing defmt panic logging setup

Author: kevswims

.cargo/config

@@ -1,7 +1,8 @@
 [target.thumbv7em-none-eabihf]
-runner = 'arm-none-eabi-gdb -q -x openocd.gdb'
+runner = 'probe-run --connect-under-reset'
 rustflags = [
-  "-C", "link-arg=-Tlink.x"
+  "-C", "link-arg=-Tlink.x",
+  "-C", "link-arg=-Tdefmt.x",
 ]
 
 [build]

.vscode/settings.json

@@ -1,9 +1,11 @@
 {
-  "rust.all_targets": false,
-  "rust.target": "thumbv7em-none-eabihf",
-  "rust.all_features": false,
-  "rust.features": [
-    "rt",
-    "stm32g431"
+  "rust-analyzer.check.allTargets": false,
+  "rust-analyzer.check.extraArgs": [
+    "--examples",
+  ],
+  "rust-analyzer.cargo.target": "thumbv7em-none-eabihf",
+  "rust-analyzer.cargo.features": [
+    "stm32g473",
+    "defmt-logging",
   ]
 }

Cargo.toml

@@ -12,14 +12,17 @@ repository = "https://github.com/stm32-rs/stm32g4xx-hal"
 version = "0.0.0"
 
 [dependencies]
-cortex-m = "0.7.1"
 nb = "0.1.1"
 stm32g4 = "0.14.0"
 paste = "1.0"
 bitflags = "1.2"
 vcell = "0.1"
 static_assertions = "1.1"
 
+[dependencies.cortex-m]
+version = "0.7.7"
+features = ["critical-section-single-core"]
+
 [dependencies.cast]
 version = "0.2.7"
 default-features = false
@@ -44,13 +47,15 @@ default-features = false
 version = "1.1"
 
 [dependencies.defmt]
-version = "0.3.0"
+version = "0.3.2"
 optional = true
 
 [dev-dependencies]
-cortex-m-rt = "0.6.10"
-cortex-m-rtfm = "0.5.1"
+cortex-m-rt = "0.7.2"
+defmt-rtt = "0.4.0"
+cortex-m-rtic = "0.5.8"
 cortex-m-semihosting = "0.3.5"
+panic-probe = { version = "0.3.0", features = ["print-defmt"] }
 panic-semihosting = "0.5.3"
 panic-halt = "0.2.0"
 panic-itm = "0.4.2"
@@ -80,7 +85,7 @@ stm32g4a1 = ["stm32g4/stm32g4a1"]
 log-itm = ["cortex-m-log/itm"]
 log-rtt = []
 log-semihost = ["cortex-m-log/semihosting"]
-unstable-defmt = ["defmt"]
+defmt-logging = ["defmt"]
 
 [profile.dev]
 codegen-units = 1

README.md

@@ -29,9 +29,26 @@ If you are compiling the crate on its own for development or running examples,
 specify your microcontroller on the command line. For example:
 
 ```
-cargo build --example blinky
+cargo build --example blinky --features stm32g473
 ```
 
+## Running examples
+
+Examples can be built and run using `cargo run`. It is necessary to provide any
+required features followed by the name of the chip. 
+
+```
+cargo run --example usb_serial --features stm32g473 --features usb_fs --release -- --chip STM32G473RETx
+```
+
+A list of chips supported by probe-rs can be found by running
+
+```
+probe-run --list-chips
+```
+
+For furher information, see the documentation for [probe-run](https://github.com/knurling-rs/probe-run).
+
 ### Using as a Dependency
 
 When using this crate as a dependency in your project, the microcontroller can 

examples/panic.rs

@@ -0,0 +1,29 @@
+#![no_main]
+#![no_std]
+
+use defmt_rtt as _;
+
+use panic_probe as _;
+
+use stm32g4 as _;
+
+use defmt::Format;
+
+#[defmt::panic_handler]
+fn panic() -> ! {
+    cortex_m::asm::udf()
+}
+
+pub fn exit() -> ! {
+    loop {
+        cortex_m::asm::bkpt();
+    }
+}
+
+#[cortex_m_rt::entry]
+fn main() -> ! {
+    defmt::info!("main");
+
+    panic!("Something bad");
+    // defmt::panic!()
+}