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|
//! Miscellaneous assembly instructions
/// Puts the processor in Debug state. Debuggers can pick this up as a
/// "breakpoint".
///
/// Optionally, an "immediate" value (in the 0-255 range) can be passed to
/// `bkpt!`. The debugger can then read this value using the Program Counter
/// (PC).
#[cfg(target_arch = "arm")]
#[macro_export]
macro_rules! bkpt {
() => {
asm!("bkpt"
:
:
:
: "volatile");
};
($imm:expr) => {
asm!(concat!("bkpt #", stringify!($imm))
:
:
:
: "volatile");
};
}
/// Puts the processor in Debug state. Debuggers can pick this up as a
/// "breakpoint".
///
/// Optionally, an "immediate" value (in the 0-255 range) can be passed to
/// `bkpt!`. The debugger can then read this value using the Program Counter
/// (PC).
#[cfg(not(target_arch = "arm"))]
#[macro_export]
macro_rules! bkpt {
() => {
asm!("");
};
($e:expr) => {
asm!("");
};
}
/// Wait For Event
pub fn wfe() {
match () {
#[cfg(target_arch = "arm")]
() => unsafe {
asm!("wfe"
:
:
:
: "volatile")
},
#[cfg(not(target_arch = "arm"))]
() => {}
}
}
/// Wait For Interrupt
pub fn wfi() {
match () {
#[cfg(target_arch = "arm")]
() => unsafe{
asm!("wfi"
:
:
:
: "volatile")
},
#[cfg(not(target_arch = "arm"))]
() => {}
}
}
/// A no-operation. Useful to prevent delay loops from being optimized away.
pub fn nop() {
unsafe {
asm!("nop"
:
:
:
: "volatile");
}
}
|
