Add features for rp2040 and rp2350

.cargo/config.toml

@@ -1,12 +1,7 @@
 [target.'cfg(all(target_arch = "arm", target_os = "none"))']
-# Choose a default "cargo run" tool:
+runner = "picotool load -u -v -x -t elf"
-# - probe-run provides flashing and defmt via a hardware debugger
+# runner = "elf2uf2-rs -d" # rp2040
-# - cargo embed offers flashing, rtt, defmt and a gdb server via a hardware debugger
-#     it is configured via the Embed.toml in the root of this project
-# - elf2uf2-rs loads firmware over USB when the rp2040 is in boot mode
-# runner = "probe-run --chip RP2040"
-# runner = "cargo embed"
-runner = "elf2uf2-rs -d"
 
 [build]
 target = "thumbv8m.main-none-eabihf"
+# target = "thumbv6m-none-eabi" # rp2040

.gitea/workflows/pull_request.yaml

@@ -10,7 +10,20 @@ jobs:
     steps:
       - uses: https://github.com/actions/checkout@main
 
+      - uses: https://github.com/SebRollen/toml-action@v1.2.0
+        id: read_rust_toolchain
+        with:
+          file: rust-toolchain
+          field: toolchain.targets
+        id: read_rust_components
+        with:
+          file: rust-toolchain
+          field: toolchain.components
+
       - uses: https://github.com/dtolnay/rust-toolchain@stable
+        with:
+          toolchain: ${{ steps.read_rust_toolchain.outputs.value }}
+          components: ${{ steps.read_rust_components.outputs.value }}
 
       - name: Build
         run: cargo build

Cargo.toml

@@ -22,3 +22,9 @@ embassy-futures = { version = "0.1.1" }
 
 cortex-m-rt = "0.7.5"
 cortex-m = { version = "0.7.7", features = ["inline-asm"] }
+
+[features]
+rp2350 = ["embassy-rp/rp235xa"]
+rp2040 = ["embassy-rp/rp2040"]
+
+default = ["rp2350"]

build.rs

@@ -17,10 +17,19 @@ fn main() {
     // Put `memory.x` in our output directory and ensure it's
     // on the linker search path.
     let out = &PathBuf::from(env::var_os("OUT_DIR").unwrap());
+
+    #[cfg(feature = "rp2040")]
     File::create(out.join("memory.x"))
         .unwrap()
-        .write_all(include_bytes!("memory.x"))
+        .write_all(include_bytes!("rp_2040_memory.x"))
         .unwrap();
+
+    #[cfg(feature = "rp2350")]
+    File::create(out.join("memory.x"))
+        .unwrap()
+        .write_all(include_bytes!("rp_2350_memory.x"))
+        .unwrap();
+
     println!("cargo:rustc-link-search={}", out.display());
 
     // By default, Cargo will re-run a build script whenever
@@ -31,4 +40,7 @@ fn main() {
 
     println!("cargo:rustc-link-arg-bins=--nmagic");
     println!("cargo:rustc-link-arg-bins=-Tlink.x");
+
+    #[cfg(feature = "rp2040")]
+    println!("cargo:rustc-link-arg-bins=-Tlink-rp.x");
 }

rp_2040_memory.x

@@ -0,0 +1,17 @@
+MEMORY {
+    BOOT2 : ORIGIN = 0x10000000, LENGTH = 0x100
+    FLASH : ORIGIN = 0x10000100, LENGTH = 2048K - 0x100
+
+    /* Pick one of the two options for RAM layout     */
+
+    /* OPTION A: Use all RAM banks as one big block   */
+    /* Reasonable, unless you are doing something     */
+    /* really particular with DMA or other concurrent */
+    /* access that would benefit from striping        */
+    RAM   : ORIGIN = 0x20000000, LENGTH = 264K
+
+    /* OPTION B: Keep the unstriped sections separate */
+    /* RAM: ORIGIN = 0x20000000, LENGTH = 256K        */
+    /* SCRATCH_A: ORIGIN = 0x20040000, LENGTH = 4K    */
+    /* SCRATCH_B: ORIGIN = 0x20041000, LENGTH = 4K    */
+}

rust-toolchain.toml

@@ -1,3 +1,4 @@
 [toolchain]
-components = [ "rust-src", "rustfmt", "llvm-tools" ]
+components = ["rust-src", "rustfmt", "llvm-tools"]
-targets = ["thumbv6m-none-eabi"]
+targets = ["thumbv8m.main-none-eabihf"]
+# targets = ["thumbv6m-none-eabi"]

src/main.rs

@@ -1,6 +1,12 @@
 #![no_std]
 #![no_main]
 
+#[cfg(not(all(
+    not(all(feature = "rp2040", feature = "rp2350")),
+    any(feature = "rp2040", feature = "rp2350")
+)))]
+compile_error!("Enable either feature rp2040 (pico 1) or feature rp2350 (pico 2)");
+
 use core::panic::PanicInfo;
 
 use embassy_executor::Spawner;
@@ -11,6 +17,11 @@ fn panic(_info: &PanicInfo) -> ! {
     loop {}
 }
 
+#[cfg(feature = "rp2350")]
+#[link_section = ".start_block"]
+#[used]
+pub static IMAGE_DEF: embassy_rp::block::ImageDef = embassy_rp::block::ImageDef::secure_exe();
+
 #[embassy_executor::main]
 async fn main(_spawner: Spawner) {
     let p = embassy_rp::init(Default::default());