filipriec/stm32_rust
1
0
Fork 0
Code Issues Pull Requests Actions Packages Projects Releases Wiki Activity

standby from C HAL is working

Browse Source
This commit is contained in:
Priec
2025-12-03 13:05:13 +01:00
parent 60d1ae9a45
commit 9ab8f94f92
1 changed files with 43 additions and 69 deletions
Download Patch File Download Diff File Expand all files Collapse all files

112
semestralka_2/src/bin/main.rs
View File

@@ -9,8 +9,10 @@ use embassy_executor::Spawner;
use embassy_futures::yield_now;
use embassy_stm32::bind_interrupts;
use embassy_stm32::peripherals;
use embassy_stm32::usart::{BufferedUart, Config, BufferedInterruptHandler};
use embassy_stm32::Config;
use embassy_stm32::usart::{BufferedUart, Config as UsartConfig, BufferedInterruptHandler};
use embassy_stm32::gpio::{Output, Level, Speed};
use embassy_stm32::wdg::IndependentWatchdog;
use embassy_time::{Duration, Timer};
use static_cell::StaticCell;
@@ -25,52 +27,34 @@ bind_interrupts!(struct Irqs {
});
unsafe extern "C" {
fn HAL_Init();
fn HAL_PWR_EnterSTANDBYMode();
fn HAL_IWDG_Init(handle: *mut ());
fn HAL_IWDG_Refresh(handle: *mut ());
fn __HAL_PWR_GET_FLAG(flag: u32) -> u32;
fn __HAL_PWR_CLEAR_FLAG(flag: u32);
}
const PWR_FLAG_SBF: u32 = 1 << 1;
#[repr(C)]
struct IWDG_InitTypeDef {
prescaler: u32,
reload: u32,
window: u32,
ewi: u32,
}
#[repr(C)]
struct IWDG_HandleTypeDef {
instance: *mut u32,
init: IWDG_InitTypeDef,
}
const IWDG_PRESCALER_256: u32 = 0x06; // prescaler divider
const IWDG_BASE: u32 = 0x4000_3000; // IWDG base address (STM32U5)
static mut IWDG_HANDLE: IWDG_HandleTypeDef = IWDG_HandleTypeDef {
instance: IWDG_BASE as *mut u32,
init: IWDG_InitTypeDef {
prescaler: IWDG_PRESCALER_256,
reload: 125, // ~1s timeout with 32kHz LSI
window: 0xFFF, // disabled window
ewi: 0, // no early wake-up interrupt
},
};
#[embassy_executor::main]
async fn main(spawner: Spawner) {
info!("boot");
let p = embassy_stm32::init(Default::default());
let mut led = Output::new(p.PB0, Level::Low, Speed::Low);
let mut config = Config::default();
config.enable_debug_during_sleep = true;
let p = embassy_stm32::init(config);
let mut led = Output::new(p.PA3, Level::Low, Speed::Low);
let _led_ground = Output::new(p.PB0, Level::Low, Speed::Low);
info!("init m8");
// Clearing after the wakeup
let rcc = pac::RCC;
rcc.csr().write(|w| w.set_rmvf(true));
// Check wake source
let pwr = pac::PWR;
if pwr.sr().read().sbf() {
info!("Woke from Standby via watchdog");
pwr.sr().write(|w| w.set_sbf(true));
}
// HARDWARE UART to the PC
let mut cfg = Config::default();
let mut cfg = UsartConfig::default();
cfg.baudrate = BAUD;
static TX_BUF: StaticCell<[u8; 256]> = StaticCell::new();
static RX_BUF: StaticCell<[u8; 256]> = StaticCell::new();
@@ -87,42 +71,32 @@ async fn main(spawner: Spawner) {
spawner.spawn(uart_task(uart, &PIPE_HW_TX, &PIPE_HW_RX).unwrap());
// END OF HARDWARE UART to the PC
let pwr = pac::PWR;
let dbg = pac::DBGMCU;
let cr = dbg.cr().read();
info!("DBGMCU CR: dbg_stop={}, dbg_standby={}", cr.dbg_stop(), cr.dbg_standby());
let from_standby = pwr.sr().read().sbf();
if from_standby {
info!("Wake from Standby");
pwr.sr().write(|w| w.set_sbf(true));
}
let rcc = pac::RCC;
let csr = rcc.csr().read();
if csr.iwdgrstf() {
info!("Reset source: IWDG");
}
rcc.csr().write(|w| w.set_rmvf(true)); // clear reset flags
info!("Iwdg 1 init");
// MAIN LOOP
info!("tick start");
led.set_high();
info!("LED IS HIGH");
Timer::after(Duration::from_millis(500)).await;
led.set_low();
info!("LED IS LOW");
Timer::after(Duration::from_millis(500)).await;
led.set_high();
info!("LED IS HIGH");
info!("Iwdg init");
let mut watchdog = IndependentWatchdog::new(p.IWDG, 2_000_000); // 2 seconds
watchdog.unleash();
Timer::after(Duration::from_millis(10)).await;
unsafe {
HAL_IWDG_Init(addr_of_mut!(IWDG_HANDLE) as *mut ());
info!("Standby...");
HAL_PWR_EnterSTANDBYMode();
}
info!("Iwdg 2 init");
loop {
info!("tick start");
led.set_high();
info!("LED IS HIGH");
Timer::after(Duration::from_millis(500)).await;
led.set_low();
info!("LED IS LOW");
Timer::after(Duration::from_millis(500)).await;
led.set_high();
info!("LED IS HIGH");
unsafe {
info!("Standby...");
led.set_low();
HAL_IWDG_Refresh(addr_of_mut!(IWDG_HANDLE) as *mut ());
HAL_PWR_EnterSTANDBYMode();
}
yield_now().await;
cortex_m::asm::wfi();
}
}