[−][src]Crate cortex_m

Low level access to Cortex-M processors

This crate provides:

  • Access to core peripherals like NVIC, SCB and SysTick.
  • Access to core registers like CONTROL, MSP and PSR.
  • Interrupt manipulation mechanisms
  • Safe wrappers around Cortex-M specific instructions like bkpt

Optional features

inline-asm

When this feature is enabled the implementation of all the functions inside the asm and register modules use inline assembly (llvm_asm!) instead of external assembly (FFI into separate assembly files pre-compiled using arm-none-eabi-gcc). The advantages of enabling inline-asm are:

  • Reduced overhead. FFI eliminates the possibility of inlining so all operations include a function call overhead when inline-asm is not enabled.

  • Some of the register API only becomes available only when inline-asm is enabled. Check the API docs for details.

The disadvantage is that inline-asm requires a nightly toolchain.

Minimum Supported Rust Version (MSRV)

This crate is guaranteed to compile on stable Rust 1.36 and up. It might compile with older versions but that may change in any new patch release.

Re-exports

pub use crate::peripheral::Peripherals;

Modules

asm

Miscellaneous assembly instructions

interrupt

Interrupts

itm

Instrumentation Trace Macrocell

peripheral

Core peripherals

register

Processor core registers

Macros

iprint

Macro for sending a formatted string through an ITM channel

iprintln

Macro for sending a formatted string through an ITM channel, with a newline.

singleton

Macro to create a mutable reference to a statically allocated value