jamesmunns

[profile.dev]
opt-level = 0
debug = true

[profile.release]
codegen-units = 1
lto           = true
opt-level     = 3

jamesmunns

Graphical Debugging for Embedded Rust

So, I recently re-discovered gdbgui - a python tool that attaches to a GDB server and provides a graphical frontend in your browser. It turns out, this works really well for Embedded Rust Development! This also works across Windows, Mac, and Linux, which means it should be handy for most embedded devs out there!

I noticed a couple small tweaks that were necessary to get this working for me, and I wanted to share. Here are my suggestions for getting started:

1. Install

Check out their installation instructions. In addition, you will also need:

jamesmunns

diff --git a/build.rs b/build.rs
index 73d61f7..d7dfb04 100644
--- a/build.rs
+++ b/build.rs
@@ -45,6 +45,7 @@ handlers.");
     Build::new().file("exceptions.s").compile("asm");

     println!("cargo:rustc-link-search={}", out.display());
+    println!("cargo:rustc-link-lib=static=asm");

jamesmunns

pub fn new() -> PeripheralX {
    // Syntax could look a little like this:
    let int_handle = interrupt!(UARTE0_UART0, |mut cons: Consumer| {
        // Do some interrupty things here
        cons.read();
        // ...
    });

    // Enable the interrupt, but do not pend
    int_handle.spawn();

jamesmunns

diff --git a/src/libcore/cell.rs b/src/libcore/cell.rs
index ec7d366c3f..421b741a3a 100644
--- a/src/libcore/cell.rs
+++ b/src/libcore/cell.rs
@@ -1512,6 +1512,18 @@ impl<T: ?Sized> UnsafeCell<T> {
     }
 }

+// TODO: correct stable attribute
+#[stable(feature = "rust1", since = "1.0.0")]

jamesmunns

Install ARCH Linux with encrypted file-system and UEFI

The official installation guide (https://wiki.archlinux.org/index.php/Installation_Guide) contains a more verbose description.

Download the Arch ISO

• Image from https://www.archlinux.org/

Copy to a USB drive

jamesmunns

➜  tinyrocket git:(james-hack) ✗ ls -hal target/x86_64-unknown-linux-gnu/release/tinyrocket                     
-rwxr-xr-x 2 james users 1.2M Mar 30 14:53 target/x86_64-unknown-linux-gnu/release/tinyrocket
➜  tinyrocket git:(james-hack) ✗ strip target/x86_64-unknown-linux-gnu/release/tinyrocket 
➜  tinyrocket git:(james-hack) ✗ ls -hal target/x86_64-unknown-linux-gnu/release/tinyrocket
-rwxr-xr-x 2 james users 816K Mar 30 14:53 target/x86_64-unknown-linux-gnu/release/tinyrocket
➜  tinyrocket git:(james-hack) ✗ ldd target/x86_64-unknown-linux-gnu/release/tinyrocket
	linux-vdso.so.1 (0x00007ffdb3fe8000)
	libdl.so.2 => /usr/lib/libdl.so.2 (0x00007fd659240000)
	librt.so.1 => /usr/lib/librt.so.1 (0x00007fd659038000)
	libpthread.so.0 => /usr/lib/libpthread.so.0 (0x00007fd658e1a000)

jamesmunns

# ! [ cfg_attr ( feature = "rt" , feature ( global_asm ) ) ] # ! [ cfg_attr ( feature = "rt" , feature ( macro_reexport ) ) ] # ! [ cfg_attr ( feature = "rt" , feature ( used ) ) ] # ! [ doc = "Peripheral access API for LPC43XX microcontrollers (generated using svd2rust v0.12.0)\n\nYou can find an overview of the API [here].\n\n[here]: https://docs.rs/svd2rust/0.12.0/svd2rust/#peripheral-api" ] # ! [ allow ( private_no_mangle_statics ) ] # ! [ deny ( missing_docs ) ] # ! [ deny ( warnings ) ] # ! [ allow ( non_camel_case_types ) ] # ! [ feature ( const_fn ) ] # ! [ feature ( try_from ) ] # ! [ no_std ]
extern crate bare_metal;
extern crate cortex_m;
#[macro_reexport(default_handler, exception)]
#[cfg(feature = "rt")]
extern crate cortex_m_rt;
extern crate vcell;
use core::ops::Deref;
use core::marker::PhantomData;
#[doc = r" Number available in the NVIC for configuring priority"]

jamesmunns

# ! [ cfg_attr ( feature = "rt" , feature ( global_asm ) ) ] # ! [ cfg_attr ( feature = "rt" , feature ( macro_reexport ) ) ] # ! [ cfg_attr ( feature = "rt" , feature ( used ) ) ] # ! [ doc = "Peripheral access API for ATSAMD21E15A microcontrollers (generated using svd2rust v0.12.0)\n\nYou can find an overview of the API [here].\n\n[here]: https://docs.rs/svd2rust/0.12.0/svd2rust/#peripheral-api" ] # ! [ allow ( private_no_mangle_statics ) ] # ! [ deny ( missing_docs ) ] # ! [ deny ( warnings ) ] # ! [ allow ( non_camel_case_types ) ] # ! [ feature ( const_fn ) ] # ! [ no_std ]
extern crate bare_metal;
extern crate cortex_m;
#[macro_reexport(default_handler, exception)]
#[cfg(feature = "rt")]
extern crate cortex_m_rt;
extern crate vcell;
use core::ops::Deref;
use core::marker::PhantomData;
#[doc = r" Number available in the NVIC for configuring priority"]

jamesmunns

--- ficr-before.rs	2018-02-27 15:45:28.375958754 +0100
+++ ficr-after.rs	2018-02-27 15:44:11.041326001 +0100
@@ -1,413 +1,2311 @@
 #[doc = "Factory Information Configuration Registers"]
 pub struct FICR {
     _marker: PhantomData<*const ()>,
 }
 unsafe impl Send for FICR {}
 impl FICR {
     #[doc = r" Returns a pointer to the register block"]