.cargo/config.toml

@@ -1,7 +1,16 @@
 [target.'cfg(all(target_arch = "arm", target_os = "none"))']
-runner = "picotool load -u -v -x -t elf"
+# Choose a default "cargo run" tool:
-# runner = "elf2uf2-rs -d" # rp2040
+# - probe-run provides flashing and defmt via a hardware debugger
+# - 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"
+# Cortex-M0 and Cortex-M0+
-# target = "thumbv6m-none-eabi" # rp2040
+target = "thumbv6m-none-eabi"
+
+[env]
+# DEFMT_LOG = "debug"

.gitea/workflows/pull_request.yaml

@@ -0,0 +1,16 @@
+name: Merge Build
+run_name: Test successful build on merge request
+
+on:
+  pull_request:
+    types: [opened, reopened, edited, review_requested, synchronize]
+
+jobs:
+  Build:
+    steps:
+      - uses: https://github.com/actions/checkout@main
+
+      - uses: https://github.com/dtolnay/rust-toolchain@stable
+
+      - name: Build
+        run: cargo build

.gitea/workflows/push_master.yaml

@@ -1,30 +0,0 @@
-name: Build on master branch
-run_name: Test successful build on push
-
-on:
-  push:
-    branches:
-      - master
-
-jobs:
-  Build:
-    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

.gitea/workflows/push_non_master.yaml

@@ -1,30 +0,0 @@
-name: Build on feature branch
-run_name: Test successful build on push
-
-on:
-  push:
-    branches-ignore:
-      - master
-
-jobs:
-  Build:
-    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

@@ -6,25 +6,8 @@ edition = "2021"
 # See more keys and their definitions at https://doc.rust-lang.org/cargo/reference/manifest.html
 
 [dependencies]
-embassy-executor = { version = "0.7.0", features = [
+embassy-executor = { version = "0.5.0", features = ["task-arena-size-32768", "arch-cortex-m", "executor-thread", "executor-interrupt", "integrated-timers"] }
-    "task-arena-size-32768",
+embassy-rp = { version = "0.1.0", features = ["unstable-pac", "time-driver", "critical-section-impl"] }
-    "arch-cortex-m",
-    "executor-thread",
-    "executor-interrupt",
-] }
-embassy-rp = { version = "0.3.1", features = [
-    "unstable-pac",
-    "time-driver",
-    "critical-section-impl",
-    "rp235xa",
-] }
 embassy-futures = { version = "0.1.1" }
 
-cortex-m-rt = "0.7.5"
+cortex-m-rt = "0.7.4"
-cortex-m = { version = "0.7.7", features = ["inline-asm"] }
-
-[features]
-rp2350 = ["embassy-rp/rp235xa"]
-rp2040 = ["embassy-rp/rp2040"]
-
-default = ["rp2350"]

build.rs

@@ -17,19 +17,10 @@ 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!("rp_2040_memory.x"))
+        .write_all(include_bytes!("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
@@ -40,7 +31,6 @@ 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");
+    // println!("cargo:rustc-link-arg-bins=-Tdefmt.x");
 }

rp_2350_memory.x

@@ -1,75 +0,0 @@
-MEMORY {
-    /*
-     * The RP2350 has either external or internal flash.
-     *
-     * 2 MiB is a safe default here, although a Pico 2 has 4 MiB.
-     */
-    FLASH : ORIGIN = 0x10000000, LENGTH = 2048K
-    /*
-     * RAM consists of 8 banks, SRAM0-SRAM7, with a striped mapping.
-     * This is usually good for performance, as it distributes load on
-     * those banks evenly.
-     */
-    RAM : ORIGIN = 0x20000000, LENGTH = 512K
-    /*
-     * RAM banks 8 and 9 use a direct mapping. They can be used to have
-     * memory areas dedicated for some specific job, improving predictability
-     * of access times.
-     * Example: Separate stacks for core0 and core1.
-     */
-    SRAM4 : ORIGIN = 0x20080000, LENGTH = 4K
-    SRAM5 : ORIGIN = 0x20081000, LENGTH = 4K
-}
-
-SECTIONS {
-    /* ### Boot ROM info
-     *
-     * Goes after .vector_table, to keep it in the first 4K of flash
-     * where the Boot ROM (and picotool) can find it
-     */
-    .start_block : ALIGN(4)
-    {
-        __start_block_addr = .;
-        KEEP(*(.start_block));
-        KEEP(*(.boot_info));
-    } > FLASH
-
-} INSERT AFTER .vector_table;
-
-/* move .text to start /after/ the boot info */
-_stext = ADDR(.start_block) + SIZEOF(.start_block);
-
-SECTIONS {
-    /* ### Picotool 'Binary Info' Entries
-     *
-     * Picotool looks through this block (as we have pointers to it in our
-     * header) to find interesting information.
-     */
-    .bi_entries : ALIGN(4)
-    {
-        /* We put this in the header */
-        __bi_entries_start = .;
-        /* Here are the entries */
-        KEEP(*(.bi_entries));
-        /* Keep this block a nice round size */
-        . = ALIGN(4);
-        /* We put this in the header */
-        __bi_entries_end = .;
-    } > FLASH
-} INSERT AFTER .text;
-
-SECTIONS {
-    /* ### Boot ROM extra info
-     *
-     * Goes after everything in our program, so it can contain a signature.
-     */
-    .end_block : ALIGN(4)
-    {
-        __end_block_addr = .;
-        KEEP(*(.end_block));
-    } > FLASH
-
-} INSERT AFTER .uninit;
-
-PROVIDE(start_to_end = __end_block_addr - __start_block_addr);
-PROVIDE(end_to_start = __start_block_addr - __end_block_addr);

rust-toolchain.toml

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

src/main.rs

@@ -1,12 +1,6 @@
 #![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;
@@ -17,11 +11,6 @@ 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());