Update runner docs (#49)

* Update cargo-embed instructions

* Add probe-rs-cli run instructions

* Add commented probe-rs-cli runner

.cargo/config.toml

@@ -1,9 +1,11 @@
 [target.'cfg(all(target_arch = "arm", target_os = "none"))']
 # Choose a default "cargo run" tool:
-# - probe-run provides flashing and defmt via a hardware debugger
+# - probe-run provides flashing and defmt via a hardware debugger, and stack unwind on panic
 # - elf2uf2-rs loads firmware over USB when the rp2040 is in boot mode
+# - "probe-rs-cli run" is similar to probe-run but it uses the latest probe-rs lib crate
 runner = "probe-run --chip RP2040"
 # runner = "elf2uf2-rs -d"
+# runner = "probe-rs-cli run --chip RP2040 --protocol swd"
 
 rustflags = [
   "-C", "linker=flip-link",

README.md

@@ -134,23 +134,15 @@ Some of the options for your `runner` are listed below:
   $ cargo install cargo-embed
   ```
 
-  *Step 2* - Make sure your .cargo/config contains the following
-
-  ```toml
-  [target.thumbv6m-none-eabi]
-  runner = "cargo embed"
-  ```
-
-  *Step 3* - Update settings in [Embed.toml](./Embed.toml)  
+  *Step 2* - Update settings in [Embed.toml](./Embed.toml)  
   - The defaults are to flash, reset, and start a defmt logging session
   You can find all the settings and their meanings [in the cargo-embed repo](https://github.com/probe-rs/probe-rs/blob/master/cargo-embed/src/config/default.toml)
 
-  *Step 4* - Use `cargo run`, which will compile the code and start the
-  specified 'runner'. As the 'runner' is cargo embed, it will flash the device
-  and start running immediately
+  *Step 3* - Use the command `cargo embed`, which will compile the code, flash the device
+  and start running the configuration specified in Embed.toml
 
   ```console
-  $ cargo run --release
+  $ cargo embed --release
   ```
 
 * **probe-rs-debugger**
@@ -171,6 +163,28 @@ Some of the options for your `runner` are listed below:
 
   *Step 5* - Launch a debug session by choosing `Run`>`Start Debugging` (or press F5)
 
+* **probe-rs-cli**  
+  *Step 1* - Install [`probe-rs-cli`](https://crates.io/crates/probe-rs-cli):
+
+  ```console
+  $ cargo install probe-rs-cli
+  ```
+
+  *Step 2* - Make sure your .cargo/config contains the following
+
+  ```toml
+  [target.thumbv6m-none-eabi]
+  runner = "probe-rs-cli run --chip RP2040 --protocol swd"
+  ```
+
+  *Step 3* - Use `cargo run`, which will compile the code and start the
+  specified 'runner'. As the 'runner' is cargo embed, it will flash the device
+  and start running immediately
+
+  ```console
+  $ cargo run --release
+  ```
+
 * **Loading a UF2 over USB**  
   *Step 1* - Install [`elf2uf2-rs`](https://github.com/JoNil/elf2uf2-rs):