initial commit

.cargo/config

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+[target.thumbv6m-none-eabi]
+runner = 'arm-none-eabi-gdb'
+
+rustflags = [
+	"-C", "link-arg=-Tlink.x",
+	# "-C", "link-arg=-s",
+]
+
+[build]
+target = "thumbv6m-none-eabi"

.gdbinit

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+target remote :3333
+monitor arm semihosting enable
+set print asm-demangle on
+load
+break main
+continue

.gitignore

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+/target
+**/*.rs.bk

Cargo.toml

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+[package]
+name = "uart-buster"
+version = "0.1.0"
+authors = ["Ben Lichtman"]
+edition = "2018"
+
+# See more keys and their definitions at https://doc.rust-lang.org/cargo/reference/manifest.html
+
+[dependencies]
+# panic-halt = "0.2.0"
+panic-semihosting = "0.5.3"
+embedded-hal = "0.2.3"
+nrf51-hal = "0.7.1"
+cortex-m-rt = "0.6.12"
+cortex-m-semihosting = "0.3.5"
+cortex-m = "0.6.1"
+nb = "0.1.2"
+alloc-cortex-m = "0.3.5"
+
+[profile.dev]
+debug = true
+opt-level = 3
+
+[profile.release]
+debug = false
+lto = "fat"
+opt-level = 3

build.rs

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+use std::env;
+use std::fs::File;
+use std::io::Write;
+use std::path::PathBuf;
+
+fn main() {
+	// Put the linker script somewhere the linker can find it
+	let out = &PathBuf::from(env::var_os("OUT_DIR").unwrap());
+	File::create(out.join("memory.x"))
+		.unwrap()
+		.write_all(include_bytes!("memory.x"))
+		.unwrap();
+	println!("cargo:rustc-link-search={}", out.display());
+
+	// Only re-run the build script when memory.x is changed,
+	// instead of when any part of the source code changes.
+	println!("cargo:rerun-if-changed=memory.x");
+}

debug_client.sh

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+arm-none-eabi-gdb -q target/thumbv6m-none-eabi/debug/microbit-rust

debug_server.sh

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+openocd -f interface/cmsis-dap.cfg -f target/nrf51.cfg

memory.x

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+MEMORY
+{
+	/* NOTE K = KiBi = 1024 bytes */
+	FLASH : ORIGIN = 0x00000000, LENGTH = 256K
+	RAM : ORIGIN = 0x20000000, LENGTH = 16K
+}
+
+/* This is where the call stack will be allocated. */
+/* The stack is of the full descending type. */
+/* NOTE Do NOT modify `_stack_start` unless you know what you are doing */
+_stack_start = ORIGIN(RAM) + LENGTH(RAM);

microbit.cfg

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+source [find interface/cmsis-dap.cfg]
+source [find target/nrf51.cfg]
+
+init
+flash probe 0