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maybe don't steal peripherals?

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This commit is contained in:
Jörn-Michael Miehe 2024-03-24 23:51:08 +00:00
parent cd8b254375
commit 57a49d0021
2 changed files with 38 additions and 59 deletions
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46
bluepill-rs/src/dmx2.rs
View file

@ -1,4 +1,4 @@
use stm32f1xx_hal::{dma, pac, prelude::*, serial};
use stm32f1xx_hal::{afio, dma, pac, prelude::*, rcc, serial};
type TxDma = dma::TxDma<serial::Tx<pac::USART1>, dma::dma1::C4>;
type DMXUniverse<const DMX_LEN: usize> = &'static mut [u8; DMX_LEN];
@ -79,7 +79,18 @@ pub struct DMX<const DMX_LEN: usize> {
}
impl<const DMX_LEN: usize> DMX<DMX_LEN> {
pub fn new<PINS>(mem: &'static mut [u8]) -> Self {
pub fn new<PINS>(
mem: &'static mut [u8],
mut dma_channel: dma::dma1::C4,
nvic: &mut pac::NVIC,
usart: pac::USART1,
pins: PINS,
mapr: &mut afio::MAPR,
clocks: &rcc::Clocks,
) -> Self
where
PINS: serial::Pins<pac::USART1>,
{
// use provided memory region
assert!(mem.len() >= DMX_LEN * 2);
@ -93,39 +104,16 @@ impl<const DMX_LEN: usize> DMX<DMX_LEN> {
(tx_universe, tx_buffer)
};
// Peripherals
let dp = unsafe { pac::Peripherals::steal() };
let mut cp = unsafe { pac::CorePeripherals::steal() };
let clocks = dp
.RCC
.constrain()
.cfgr
.freeze(&mut dp.FLASH.constrain().acr);
let mut gpioa = dp.GPIOA.split();
let mut afio = dp.AFIO.constrain();
let mut dma1 = dp.DMA1.split();
// setup DMA1_CHANNEL4 interrupt on TransferComplete
dma1.4.listen(dma::Event::TransferComplete);
unsafe { cp.NVIC.set_priority(pac::Interrupt::DMA1_CHANNEL4, 1) };
dma_channel.listen(dma::Event::TransferComplete);
unsafe { nvic.set_priority(pac::Interrupt::DMA1_CHANNEL4, 1) };
// Serial config
let serial = serial::Serial::new(
dp.USART1,
(
gpioa.pa9.into_alternate_open_drain(&mut gpioa.crh),
gpioa.pa10, //.into_pull_up_input(&mut gpioa.crh),
),
&mut afio.mapr,
250_000.bps(),
&clocks,
);
let serial = serial::Serial::new(usart, pins, mapr, 250_000.bps(), &clocks);
Self {
tx_universe,
sender: TxDMA::new(serial.tx.with_dma(dma1.4), tx_buffer),
sender: TxDMA::new(serial.tx.with_dma(dma_channel), tx_buffer),
}
}

43
bluepill-rs/src/main.rs
View file

@ -4,7 +4,7 @@
// mod i2c_reg_slave;
// mod i2c_slave;
mod dmx;
// mod dmx;
mod dmx2;
// extern crate panic_halt;
@ -12,13 +12,12 @@ extern crate panic_semihosting;
#[rtic::app(device = stm32f1xx_hal::pac, dispatchers = [SPI1, SPI2, SPI3])]
mod app {
use crate::dmx::DMX;
use cortex_m::singleton;
use crate::dmx2::DMX;
use stm32f1xx_hal::{
gpio::{self, ExtiPin},
pac,
prelude::*,
serial, timer,
timer,
};
use systick_monotonic::Systick;
@ -30,9 +29,8 @@ mod app {
#[shared]
struct Shared {
buffer: &'static mut [u8],
delay_us: timer::DelayUs<pac::TIM2>,
dmx: DMX<DMX_LEN>,
delay_us: timer::DelayUs<pac::TIM2>,
int_led: gpio::gpiob::PB0<gpio::Output<gpio::OpenDrain>>,
}
@ -42,7 +40,7 @@ mod app {
int_pin: gpio::gpiob::PB10<gpio::Input<gpio::PullUp>>,
}
#[init]
#[init(local = [buffer: [u8; DMX_LEN * 2] = [0b01010101; DMX_LEN * 2]])]
fn init(mut cx: init::Context) -> (Shared, Local, init::Monotonics) {
// Take ownership over the raw flash and rcc devices and convert them into the corresponding
// HAL structs
@ -68,7 +66,7 @@ mod app {
let mut gpioc = cx.device.GPIOC.split();
let mut afio = cx.device.AFIO.constrain();
let mut dma1 = cx.device.DMA1.split();
let dma1 = cx.device.DMA1.split();
// setup EXTI10 for Pin B10
let mut int_pin = gpiob.pb10.into_pull_up_input(&mut gpiob.crh);
@ -77,33 +75,26 @@ mod app {
int_pin.trigger_on_edge(&mut cx.device.EXTI, gpio::Edge::Falling);
unsafe { cx.core.NVIC.set_priority(pac::Interrupt::EXTI15_10, 1) }; // EXTI10 priority
// setup DMA1_CHANNEL4 interrupt on TransferComplete
dma1.4.listen(stm32f1xx_hal::dma::Event::TransferComplete);
unsafe { cx.core.NVIC.set_priority(pac::Interrupt::DMA1_CHANNEL4, 1) };
sender::spawn().unwrap();
// Serial config
let serial = serial::Serial::new(
(
Shared {
dmx: DMX::new(
cx.local.buffer,
dma1.4,
&mut cx.core.NVIC,
cx.device.USART1,
(
gpioa.pa9.into_alternate_open_drain(&mut gpioa.crh),
gpioa.pa10, //.into_pull_up_input(&mut gpioa.crh),
),
&mut afio.mapr,
serial::Config::default(),
&clocks,
);
sender::spawn().unwrap();
(
Shared {
buffer: singleton!(: [u8; DMX_LEN] = [0b01010101; DMX_LEN]).unwrap(),
),
// Configure timer
delay_us: cx.device.TIM2.delay_us(&clocks),
dmx: DMX::new(serial, dma1.4, &clocks),
int_led: gpiob
.pb0
.into_open_drain_output_with_state(&mut gpiob.crl, gpio::PinState::Low),
@ -128,9 +119,9 @@ mod app {
}
}
#[task(local = [led], shared = [&buffer, delay_us, dmx])]
#[task(local = [led], shared = [delay_us, dmx])]
fn sender(mut cx: sender::Context) {
cx.shared.dmx.lock(|dmx| dmx.send(cx.shared.buffer));
cx.shared.dmx.lock(|dmx| dmx.start_tx());
cx.local.led.toggle();
cx.shared.delay_us.lock(|d| d.delay(1.secs()));
@ -141,7 +132,7 @@ mod app {
#[task(binds = DMA1_CHANNEL4, shared = [dmx, int_led])]
fn waiter(cx: waiter::Context) {
(cx.shared.dmx, cx.shared.int_led).lock(|dmx, int_led| {
dmx.wait();
assert!(dmx.tx_is_idle());
int_led.toggle();
});
}