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unify channel assign

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This commit is contained in:
eZio Pan 2023-12-16 02:15:56 +08:00
parent 77e372e842
commit ea1e1973eb
1 changed files with 6 additions and 4 deletions
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10
examples/stm32f4/src/bin/ws2812_pwm_dma.rs
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@ -85,8 +85,10 @@ async fn main(_spawner: Spawner) {
let color_list = [&turn_off, &dim_white]; let color_list = [&turn_off, &dim_white];
let pwm_channel = Channel::Ch1;
// make sure PWM output keep low on first start // make sure PWM output keep low on first start
ws2812_pwm.set_duty(Channel::Ch1, 0); ws2812_pwm.set_duty(pwm_channel, 0);
{ {
use embassy_stm32::dma::{Burst, FifoThreshold, Transfer, TransferOptions}; use embassy_stm32::dma::{Burst, FifoThreshold, Transfer, TransferOptions};
@ -100,7 +102,7 @@ async fn main(_spawner: Spawner) {
loop { loop {
// start PWM output // start PWM output
ws2812_pwm.enable(Channel::Ch1); ws2812_pwm.enable(pwm_channel);
unsafe { unsafe {
Transfer::new_write( Transfer::new_write(
@ -108,7 +110,7 @@ async fn main(_spawner: Spawner) {
&mut dp.DMA1_CH2, &mut dp.DMA1_CH2,
5, 5,
color_list[color_list_index], color_list[color_list_index],
pac::TIM3.ccr(0).as_ptr() as *mut _, pac::TIM3.ccr(pwm_channel.raw()).as_ptr() as *mut _,
dma_transfer_option, dma_transfer_option,
) )
.await; .await;
@ -117,7 +119,7 @@ async fn main(_spawner: Spawner) {
} }
// stop PWM output for saving some energy // stop PWM output for saving some energy
ws2812_pwm.disable(Channel::Ch1); ws2812_pwm.disable(pwm_channel);
// wait another half second, so that we can see color change // wait another half second, so that we can see color change
Timer::after_millis(500).await; Timer::after_millis(500).await;