use crate::timer::Timer;
use crate::time::U32Ext;
use cast::u32;
use embedded_hal::blocking::delay::{DelayMs, DelayUs};
use embedded_hal::timer::CountDown;
use gd32vf103_pac::{TIMER0, TIMER1, TIMER2, TIMER3, TIMER4, TIMER5, TIMER6};
use crate::rcu::Clocks;
#[derive(Copy, Clone)]
pub struct McycleDelay {
core_frequency: u32
}
impl McycleDelay {
pub fn new(clocks: &Clocks) -> Self {
Self {
core_frequency: clocks.sysclk().0
}
}
}
impl DelayUs<u64> for McycleDelay {
fn delay_us(&mut self, us: u64) {
let t0 = riscv::register::mcycle::read64();
let clocks = (us * (self.core_frequency as u64)) / 1_000_000;
while riscv::register::mcycle::read64().wrapping_sub(t0) <= clocks { }
}
}
impl DelayUs<u32> for McycleDelay {
#[inline(always)]
fn delay_us(&mut self, us: u32) {
self.delay_us(us as u64)
}
}
impl DelayUs<i32> for McycleDelay {
#[inline(always)]
fn delay_us(&mut self, us: i32) {
assert!(us >= 0);
self.delay_us(us as u32);
}
}
impl DelayUs<u16> for McycleDelay {
#[inline(always)]
fn delay_us(&mut self, us: u16) {
self.delay_us(us as u32)
}
}
impl DelayUs<u8> for McycleDelay {
#[inline(always)]
fn delay_us(&mut self, us: u8) {
self.delay_us(us as u32)
}
}
impl DelayMs<u32> for McycleDelay {
fn delay_ms(&mut self, ms: u32) {
self.delay_us((ms as u64) * 1000)
}
}
impl DelayMs<i32> for McycleDelay {
#[inline(always)]
fn delay_ms(&mut self, ms: i32) {
assert!(ms >= 0);
self.delay_ms(ms as u32);
}
}
impl DelayMs<u16> for McycleDelay {
#[inline(always)]
fn delay_ms(&mut self, ms: u16) {
self.delay_ms(ms as u32)
}
}
impl DelayMs<u8> for McycleDelay {
#[inline(always)]
fn delay_ms(&mut self, ms: u8) {
self.delay_ms(ms as u32)
}
}
pub struct Delay<TIMER> where Timer<TIMER>: CountDown {
timer: Timer<TIMER>,
}
macro_rules! delay {
($($TIMER:ident,)+) => {
$(
impl Delay<$TIMER> {
pub fn new(timer: Timer<$TIMER>) -> Self {
Delay { timer, }
}
pub fn free(self) -> Timer<$TIMER> {
self.timer
}
}
impl DelayMs<u32> for Delay<$TIMER> {
fn delay_ms(&mut self, ms: u32) {
self.delay_us(ms * 1_000);
}
}
impl DelayMs<u16> for Delay<$TIMER> {
fn delay_ms(&mut self, ms: u16) {
self.delay_ms(u32(ms));
}
}
impl DelayMs<u8> for Delay<$TIMER> {
fn delay_ms(&mut self, ms: u8) {
self.delay_ms(u32(ms));
}
}
impl DelayUs<u32> for Delay<$TIMER> {
fn delay_us(&mut self, us: u32) {
let freq = 1_000_000 / us;
self.timer.start(freq.hz());
while let Err(_) = self.timer.wait() { }
self.timer.tim.ctl0.modify(|_, w| w.cen().clear_bit());
}
}
impl DelayUs<u16> for Delay<$TIMER> {
fn delay_us(&mut self, us: u16) {
self.delay_us(u32(us))
}
}
impl DelayUs<u8> for Delay<$TIMER> {
fn delay_us(&mut self, us: u8) {
self.delay_us(u32(us))
}
}
)+
}
}
delay! {
TIMER0,
TIMER1,
TIMER2,
TIMER3,
TIMER4,
TIMER5,
TIMER6,
}