【问题标题】：Run code with cargo run on Raspberry Pi Pico using elf2uf2-rs使用 elf2uf2-rs 在 Raspberry Pi Pico 上运行带有货物的代码
【发布时间】：2022-01-01 18:43:16
【问题描述】：

我尝试在 Raspberry Pi Pico 上运行 Rust 代码。一个简单的"blink" example 应用程序已成功（看起来）使用：

cargo build --release --target=thumbv6m-none-eabi

我已经安装了elf2uf2-rs：

cargo install elf2uf2-rs

然后我尝试使用以下命令在 Raspberry Pi Pico 上运行 Blink 应用程序：

cargo run --release --target=thumbv6m-none-eabi

但它失败并显示此消息，其中“rp2”是我的二进制文件的名称：

target/thumbv6m-none-eabi/release/rp2: cannot execute binary file

有什么可能出错的建议吗？

这是我的Cargo.toml：

[package]
name = "rp2"
version = "0.1.0"
edition = "2021"

[dependencies]
rp2040-hal = "0.3.0"
cortex-m = "0.7.2"
embedded-hal = { version = "0.2.5", features = ["unproven"] }
eh1_0_alpha = { version="=1.0.0-alpha.6", package="embedded-hal", optional=true }
embedded-time = "0.12.0"
panic-halt = "0.2.0"
rp2040-boot2 = "0.2.0"
cortex-m-rt = "0.7"
rp-pico = "0.2.0"

[dev-dependencies]
cortex-m-rt = "0.7"
panic-halt = "0.2.0"
rp2040-boot2 = "0.2.0"

[profile.dev]
panic = "abort"

[profile.release]
panic = "abort"

更新

我现在添加了一个文件.cargo/config.toml，内容如下：

# Choose a default "cargo run" tool.
# probe-run is recommended if you have a debugger
# elf2uf2-rs loads firmware over USB when the rp2040 is in boot mode
[target.'cfg(all(target_arch = "arm", target_os = "none"))']
# runner = "probe-run --chip RP2040"
runner = "elf2uf2-rs -d"

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"

还有一个包含此内容的memory.x 文件：

MEMORY {
    BOOT2 : ORIGIN = 0x10000000, LENGTH = 0x100
    FLASH : ORIGIN = 0x10000100, LENGTH = 2048K - 0x100
    RAM   : ORIGIN = 0x20000000, LENGTH = 256K
}

EXTERN(BOOT2_FIRMWARE)

SECTIONS {
    /* ### Boot loader */
    .boot2 ORIGIN(BOOT2) :
    {
        KEEP(*(.boot2));
    } > BOOT2
} INSERT BEFORE .text;

但随后cargo build --release 命令失败并出现以下错误：

error: linking with `rust-lld` failed: exit status: 1
...
= note: rust-lld: error: cannot find linker script defmt.x

我使用的是带有 M1 Apple Silicon 芯片的 MacBook，这可能是一个相关问题 rust-lld problem under AArch64 system。

【问题讨论】：

标签： rust embedded rust-cargo raspberry-pi-pico rp2040

【解决方案1】：

我现在已经在 Raspberry Pi Pico 上运行了代码。

第一个问题是我没有创建包含使用 elf2uf2“运行”的指令的 .cargo/config.toml 文件：

[target.'cfg(all(target_arch = "arm", target_os = "none"))']
runner = "elf2uf2-rs -d"

另一个问题是我的.cargo/config.toml 还包含我系统上没有的对defmt 的引用，所以在注释掉这一行时（在rustflags 下），使用cargo build --release 编译的代码它在 Raspberry Pi Pico 上运行，cargo run --release:

# "-C", "link-arg=-Tdefmt.x",

【讨论】：