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Change usage example for statically allocated heap #53

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merged 1 commit into from
Feb 12, 2022
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Change usage example for statically allocated heap #53

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9 changes: 6 additions & 3 deletions examples/global_alloc.rs
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Original file line number Diff line number Diff line change
Expand Up @@ -16,9 +16,12 @@ static ALLOCATOR: CortexMHeap = CortexMHeap::empty();
#[entry]
fn main() -> ! {
// Initialize the allocator BEFORE you use it
let start = cortex_m_rt::heap_start() as usize;
let size = 1024; // in bytes
unsafe { ALLOCATOR.init(start, size) }
{
use core::mem::MaybeUninit;
const HEAP_SIZE: usize = 1024;
static mut HEAP: [MaybeUninit<u8>; HEAP_SIZE] = [MaybeUninit::uninit(); HEAP_SIZE];
unsafe { ALLOCATOR.init((&mut HEAP).as_ptr() as usize, HEAP_SIZE) }
}

let mut xs = Vec::new();
xs.push(1);
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