Make runner command selectable (#74)

cargo-generate.toml

@@ -2,6 +2,15 @@
 cargo_generate_version = ">=0.9.0"
 
 [hooks]
-pre = [
-    "cargo-generate/remove_rprs.rhai"
-]
+pre = ["cargo-generate/remove_rprs.rhai"]
+
+[placeholders]
+flash_method = { prompt = "Which flashing method do you intend to use?", choices = [
+  "probe-rs",
+  "elf2uf2-rs",
+  "custom",
+  "none"
+], default = "probe-rs", type = "string" }
+
+[conditional.'flash_method == "custom"'.placeholders]
+flash_method_custom = { prompt = "Enter the runner command to use", type = "string" }

cargo-generate/config.toml

@@ -0,0 +1,36 @@
+[target.'cfg(all(target_arch = "arm", target_os = "none"))']
+# Choose a default "cargo run" tool (see README for more info)
+# - `probe-rs` 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
+# runner = "probe-rs run --chip RP2040 --protocol swd"
+# runner = "elf2uf2-rs -d"
+{% case flash_method -%}
+  {%- when "probe-rs" -%}
+    runner = "probe-rs run --chip RP2040 --protocol swd"
+  {%- when "elf2uf2-rs" -%}
+    runner = "elf2uf2-rs -d"
+  {%- when "none" -%}
+  {%- else -%}
+    {%- if flash_method != "" -%}
+      runner = "{{ flash_method_custom }}"
+    {%- endif -%}
+{%- endcase %}
+rustflags = [
+  "-C", "linker=flip-link",
+  "-C", "link-arg=--nmagic",
+  "-C", "link-arg=-Tlink.x",
+  "-C", "link-arg=-Tdefmt.x",
+
+  # Code-size optimizations.
+  #   trap unreachable can save a lot of space, but requires nightly compiler.
+  #   uncomment the next line if you wish to enable it
+  # "-Z", "trap-unreachable=no",
+  "-C", "inline-threshold=5",
+  "-C", "no-vectorize-loops",
+]
+
+[build]
+target = "thumbv6m-none-eabi"
+
+[env]
+DEFMT_LOG = "debug"

cargo-generate/remove_rprs.rhai

@@ -3,4 +3,5 @@ file::delete("debug_probes.md");
 file::delete("CODE_OF_CONDUCT.md");
 file::delete("Cargo.toml");
 file::rename("cargo-generate/Cargo.toml", "Cargo.toml");
+file::rename("cargo-generate/config.toml", ".cargo/config.toml");
 file::delete("cargo-generate")