mirror of https://github.com/m-labs/artiq.git
36 lines
703 B
Rust
36 lines
703 B
Rust
use core::ptr::{read_volatile, write_volatile};
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use board;
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const MAILBOX: *mut usize = board::mem::MAILBOX_BASE as *mut usize;
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static mut last: usize = 0;
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pub unsafe fn send(data: usize) {
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last = data;
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write_volatile(MAILBOX, data)
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}
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pub fn acknowledged() -> bool {
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unsafe {
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let data = read_volatile(MAILBOX);
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data == 0 || data != last
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}
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}
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pub fn receive() -> usize {
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unsafe {
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let data = read_volatile(MAILBOX);
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if data == last {
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0
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} else {
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if data != 0 {
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board::flush_cpu_dcache()
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}
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data
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}
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}
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}
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pub fn acknowledge() {
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unsafe { write_volatile(MAILBOX, 0) }
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}
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