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timer: increase rate to 500 Hz

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timestamp precision: 0.002s
This commit is contained in:
Astro 2020-03-21 00:07:18 +01:00
parent 8e41c44303
commit 9c3485d05f
2 changed files with 9 additions and 8 deletions
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4
src/main.rs
View File

@ -119,14 +119,14 @@ fn main() -> ! {
net::run(dp.ETHERNET_MAC, dp.ETHERNET_DMA, hwaddr, |iface| { net::run(dp.ETHERNET_MAC, dp.ETHERNET_DMA, hwaddr, |iface| {
Server::<Session>::run(iface, |server| { Server::<Session>::run(iface, |server| {
loop { loop {
let now = timer::now().0; let instant = Instant::from_millis(i64::from(timer::now()));
let instant = Instant::from_millis(i64::from(now));
cortex_m::interrupt::free(net::clear_pending); cortex_m::interrupt::free(net::clear_pending);
server.poll(instant) server.poll(instant)
.unwrap_or_else(|e| { .unwrap_or_else(|e| {
warn!("poll: {:?}", e); warn!("poll: {:?}", e);
}); });
let instant = Instant::from_millis(i64::from(timer::now()));
// ADC input // ADC input
adc.data_ready().unwrap().map(|channel| { adc.data_ready().unwrap().map(|channel| {
let data = adc.read_data().unwrap(); let data = adc.read_data().unwrap();

13
src/timer.rs
View File

@ -1,15 +1,16 @@
use core::cell::RefCell; use core::cell::RefCell;
use core::ops::Deref;
use cortex_m::interrupt::Mutex; use cortex_m::interrupt::Mutex;
use cortex_m_rt::exception; use cortex_m_rt::exception;
use stm32f4xx_hal::{ use stm32f4xx_hal::{
rcc::Clocks, rcc::Clocks,
time::{U32Ext, MilliSeconds}, time::U32Ext,
timer::{Timer, Event as TimerEvent}, timer::{Timer, Event as TimerEvent},
stm32::SYST, stm32::SYST,
}; };
/// Rate in Hz /// Rate in Hz
const TIMER_RATE: u32 = 20; const TIMER_RATE: u32 = 500;
/// Interval duration in milliseconds /// Interval duration in milliseconds
const TIMER_DELTA: u32 = 1000 / TIMER_RATE; const TIMER_DELTA: u32 = 1000 / TIMER_RATE;
/// Elapsed time in milliseconds /// Elapsed time in milliseconds
@ -31,10 +32,10 @@ fn SysTick() {
} }
/// Obtain current time in milliseconds /// Obtain current time in milliseconds
pub fn now() -> MilliSeconds { pub fn now() -> u32 {
let ms = cortex_m::interrupt::free(|cs| { cortex_m::interrupt::free(|cs| {
*TIMER_MS.borrow(cs) *TIMER_MS.borrow(cs)
.borrow() .borrow()
}); .deref()
ms.ms() })
} }