From a3c8d663b52bb243ddaedcda516c979cbbf9ccd7 Mon Sep 17 00:00:00 2001
From: Per Lindgren <per.lindgren@ltu.se>
Date: Tue, 12 Jan 2021 00:07:43 +0100
Subject: [PATCH] pwm saw
---
examples/rtt-pwm-dma.rs | 31 ++++++++++++++++++-------------
1 file changed, 18 insertions(+), 13 deletions(-)
diff --git a/examples/rtt-pwm-dma.rs b/examples/rtt-pwm-dma.rs
index 36b5477..dc9cc7f 100644
--- a/examples/rtt-pwm-dma.rs
+++ b/examples/rtt-pwm-dma.rs
@@ -8,7 +8,7 @@
use cortex_m::{asm, peripheral::DWT};
use panic_halt as _;
-use rtt_target::{rprintln, rtt_init_print};
+use rtt_target::{rprint, rprintln, rtt_init_print};
use stm32f4xx_hal::{bb, dma, gpio::Speed, prelude::*, pwm, stm32};
#[rtic::app(device = stm32f4xx_hal::stm32, peripherals = true)]
@@ -123,19 +123,24 @@ const APP: () = {
tim1.cr2.write(|w| w.ccpc().set_bit());
tim1.dier.write(|w| w.uie().enabled());
+ tim1.sr.modify(|_, w| w.uif().clear());
- // loop {
- // for i in 0..255 {
- // tim1.ccr1.write(|w| unsafe { w.ccr().bits(i) });
- // tim1.ccr2.write(|w| unsafe { w.ccr().bits(i) });
- // // rprintln!("-");
- // //while tim1.sr.read().uif().is_clear() {
- // while !tim1.sr.read().uif().is_clear() {
- // rprintln!("-");
- // }
- // // rprintln!("!");
- // }
- // }
+ while tim1.sr.read().uif().is_clear() {
+ rprint!("-");
+ }
+ rprintln!("here");
+ tim1.sr.modify(|_, w| w.uif().clear());
+
+ loop {
+ for i in 0..256 {
+ // wait until next update event
+ while tim1.sr.read().uif().is_clear() {}
+ tim1.sr.modify(|_, w| w.uif().clear());
+
+ tim1.ccr1.write(|w| unsafe { w.ccr().bits(i) });
+ tim1.ccr2.write(|w| unsafe { w.ccr().bits(i) });
+ }
+ }
}
#[idle]
--
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