mirror of https://github.com/m-labs/artiq
39 lines
898 B
Rust
39 lines
898 B
Rust
use core::i64;
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use csr;
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const INIT: u64 = i64::MAX as u64;
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const FREQ: u64 = csr::CONFIG_CLOCK_FREQUENCY as u64;
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pub fn init() {
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unsafe {
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csr::timer0::en_write(0);
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csr::timer0::load_write(INIT);
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csr::timer0::reload_write(INIT);
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csr::timer0::en_write(1);
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}
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}
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pub fn get_us() -> u64 {
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unsafe {
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csr::timer0::update_value_write(1);
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(INIT - csr::timer0::value_read()) / (FREQ / 1_000_000)
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}
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}
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pub fn get_ms() -> u64 {
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unsafe {
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csr::timer0::update_value_write(1);
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(INIT - csr::timer0::value_read()) / (FREQ / 1_000)
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}
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}
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pub fn spin_us(interval: u64) {
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unsafe {
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csr::timer0::update_value_write(1);
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let threshold = csr::timer0::value_read() - interval * (FREQ / 1_000_000);
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while csr::timer0::value_read() > threshold {
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csr::timer0::update_value_write(1)
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}
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}
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}
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