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Update flake.nix and README.md for Raspberry Pi Pico W support

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This commit is contained in:
Kyle J. Turpin
2026-06-04 13:44:22 -05:00
parent b5977d64ed
commit 8543d79960
2 changed files with 8 additions and 25 deletions
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README.md
+6 -14
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@@ -19,7 +19,7 @@ direnv allow
When you enter the devShell (via `direnv allow` or `nix develop`), the following happens automatically: When you enter the devShell (via `direnv allow` or `nix develop`), the following happens automatically:
✓ **Git Repository**: Initializes `.git` if not present ✓ **Git Repository**: Initializes `.git` if not present
✓ **Rust Targets**: Automatically adds common embedded Rust targets (ARM Cortex-M, RISC-V) ✓ **Rust Targets**: Automatically adds the RP2040 (Pico W) target: `thumbv6m-none-eabi`
✓ **Cargo Paths**: Sets up `$HOME/.cargo/bin` in PATH for cargo-installed binaries ✓ **Cargo Paths**: Sets up `$HOME/.cargo/bin` in PATH for cargo-installed binaries
✓ **Welcome Banner**: Displays available tools and quick commands ✓ **Welcome Banner**: Displays available tools and quick commands
@@ -35,16 +35,11 @@ cargo build
## Embedded Rust Support ## Embedded Rust Support
The devShell automatically installs common embedded Rust targets via `rustup`: The devShell automatically installs the Raspberry Pi Pico W target via `rustup`:
| Target | Platform | Use Case | | Target | Platform | Use Case |
|--------|----------|----------| |--------|----------|----------|
| `thumbv6m-none-eabi` | ARM Cortex-M0/M0+ | RP2040 (Pico) | | `thumbv6m-none-eabi` | ARM Cortex-M0/M0+ | RP2040 (Pico W) |
| `thumbv7em-none-eabihf` | ARM Cortex-M4F/M7F | STM32, nRF52840 |
| `riscv32imc-unknown-none-elf` | RISC-V 32-bit | ESP32-C3 (basic) |
| `riscv32imac-unknown-none-elf` | RISC-V 32-bit (atomic) | ESP32-C3 (advanced) |
**Note:** ESP32 Xtensa targets require espup or custom toolchains (see [esp-rs](https://github.com/esp-rs)).
## Flatpak Packaging ## Flatpak Packaging
@@ -84,14 +79,11 @@ flatpak run org.example.rustdevshell
| **rustfmt** | Rust code formatter | | **rustfmt** | Rust code formatter |
| **rust-analyzer** | Language server for IDE integration | | **rust-analyzer** | Language server for IDE integration |
| **rust-src** | Rust source code (for tools like rust-analyzer) | | **rust-src** | Rust source code (for tools like rust-analyzer) |
| **probe-rs** | Embedded debugger/flasher for ARM targets | | **probe-rs** | Embedded debugger/flasher |
| **espflash** | Flashing tool for ESP32 boards | | **openocd** | JTAG/SWD debugger |
| **openocd** | JTAG/SWD debugger for ARM and other targets |
| **minicom** | Serial terminal for device output | | **minicom** | Serial terminal for device output |
| **elf2uf2-rs** | Convert ELF to UF2 format (RP2040) | | **elf2uf2-rs** | Convert ELF to UF2 format (RP2040) |
| **picotool** | Pico-specific firmware operations | | **picotool** | Pico-specific firmware operations |
| **avrdude** | AVR microcontroller programmer |
| **ravedude** | Rapid AVR development utility |
## Testing & Development Features ## Testing & Development Features
@@ -114,7 +106,7 @@ cargo clippy
cargo fmt cargo fmt
# Build for embedded target # Build for embedded target
cargo build --target thumbv7em-none-eabihf --release cargo build --target thumbv6m-none-eabi --release
``` ```
## Project Layout ## Project Layout
flake.nix
+2 -11
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@@ -73,16 +73,11 @@
rustup rustup
# Embedded Rust tooling # Embedded Rust tooling
probe-rs-tools probe-rs-tools
espflash
openocd openocd
minicom minicom
# RP2040 UF2 workflows # RP2040 UF2 workflows
elf2uf2-rs elf2uf2-rs
picotool picotool
avrdude
pkgsCross.avr.buildPackages.libc
pkgsCross.avr.buildPackages.gcc
ravedude
pre-commit pre-commit
]; ];
@@ -102,15 +97,11 @@
export PATH="$HOME/.cargo/bin:$PATH" export PATH="$HOME/.cargo/bin:$PATH"
if command -v rustup >/dev/null 2>&1; then if command -v rustup >/dev/null 2>&1; then
echo "Ensuring common embedded Rust targets are available (idempotent)..." echo "Ensuring Raspberry Pi Pico W target is available (idempotent)..."
rustup target add thumbv6m-none-eabi >/dev/null 2>&1 || true # Cortex-M0/M0+ (RP2040) rustup target add thumbv6m-none-eabi >/dev/null 2>&1 || true # Cortex-M0/M0+ (RP2040)
rustup target add thumbv7em-none-eabihf >/dev/null 2>&1 || true # Cortex-M4F/M7F (many STM32/nRF52)
rustup target add riscv32imc-unknown-none-elf >/dev/null 2>&1 || true
rustup target add riscv32imac-unknown-none-elf >/dev/null 2>&1 || true # ESP32-C3 class
echo "Note: ESP32 Xtensa targets require espup/custom toolchains (see esp-rs)."
fi fi
echo "[rust-template] Welcome to the Rust dev shell!" echo "[rust-template] Welcome to the Rust dev shell!"
echo "Tools: cargo, rustc, clippy, rustfmt, rust-analyzer, probe-rs, espflash, openocd, minicom, elf2uf2-rs, picotool, avrdude, ravedude" echo "Tools: cargo, rustc, clippy, rustfmt, rust-analyzer, probe-rs, openocd, minicom, elf2uf2-rs, picotool"
echo "Run 'cargo build' to build, or 'nix run .#dev-helper' for a tool summary." echo "Run 'cargo build' to build, or 'nix run .#dev-helper' for a tool summary."
echo "See README.md for usage." echo "See README.md for usage."
''; '';