cortex-m

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asm::delay blocks for 1.5 times longer on 0.6.5

6

``` rust interrupt::disable(); let mut p = defmt::unwrap!(cortex_m::Peripherals::take()); p.DCB.enable_trace(); p.DWT.enable_cycle_counter(); let start = DWT::get_cycle_count(); cortex_m::asm::delay(1_000_000); let end = DWT::get_cycle_count(); defmt::info!("{:?}", end - start); ``` This snippet prints `1_500_000` with cortex-m...

japaric

Due to the semver trick (was that the name?) v0.6.5, and later v0.6.x releases, depend on v0.7.x. This means that if you use v0.6.5 you may observe changes in behavior...

japaric

iprintln!() fails to print after printing certain amount of data

4

Hello :crab:, when running the program below that repeatedly calls `iprintln!()`, it always stops printing at the same point in code, not finishing the printing tasks. It should print "Hello...

JOE1994

Cache maintenance operations require reference to self

1

Various cache maintenance-related operations require a `self` reference, which means that it is not possible for a HAL or other peripherals to clean/invalidate and/or perform other cache related operations without...

ryan-summers

cortex-m-semihosting: Ship a 1.0 release

3

Part of https://github.com/rust-embedded/wg/issues/383 Blockers: * [x] rust-embedded/cortex-m-semihosting#49 – `interrupt::free` is not enough to access `static mut` safely

thejpster

Pull out reusable semihosting code into its own crate

2

or refactor common code into another crate to make it easier to port to other architectures basically the only thing that needs to change to make this semihosting library work...

japaric

Using semihosting with no debugger attached

4

Currently it's not possible to run code that contains semihosting calls without having a debugger attached, since semihosting relies on the debugger catching `bkpt 0xab` and without a debugger, this...

zargony

add virtual unwind info (.debug_frame / CFI) to external assembly

5

virtual unwinders (\*), for example based on `gimli::{DebugFrame,UnwindSection}`, are not able to unwind through external assembly subroutines like `__nop` because these subroutines lack [CFI](https://sourceware.org/binutils/docs/as/CFI-directives.html) (Call Frame Information), which -- when...

japaric

Added arch specific mutex implementation

6

I started the implementation for an arch specific mutex to get discussion going.

korken89

After #232 there are a few outstanding issues: * Should any other (or all) cache maintenance operations be rewritten in assembly? * This is necessary if the branch instructions inserted...

adamgreig