From ab932d16987bb600a77e282d8fbe7e0029acfa8a Mon Sep 17 00:00:00 2001
From: Filipriec <filippriec@gmail.com>
Date: Tue, 2 Dec 2025 15:40:13 +0100
Subject: [PATCH] hal working

---
 semestralka_2/build.rs        |  9 ++++++---
 semestralka_2/src/bin/main.rs | 14 ++++++++++++++
 2 files changed, 20 insertions(+), 3 deletions(-)

diff --git a/semestralka_2/build.rs b/semestralka_2/build.rs
index ba9dd9a..6e6dd89 100644
--- a/semestralka_2/build.rs
+++ b/semestralka_2/build.rs
@@ -1,4 +1,5 @@
-use std::env;
+// build.rs
+
 use std::path::PathBuf;
 
 fn main() {
@@ -7,9 +8,9 @@ fn main() {
     let hal_driver = cube_path.join("Drivers/STM32U5xx_HAL_Driver");
     let cmsis = cube_path.join("Drivers/CMSIS");
     let device = cmsis.join("Device/ST/STM32U5xx");
-
     let example_inc = cube_path.join("Projects/NUCLEO-U575ZI-Q/Examples/GPIO/GPIO_IOToggle/Inc");
 
+    // HAL source files
     let hal_srcs = [
         "stm32u5xx_hal.c",
         "stm32u5xx_hal_rcc.c",
@@ -27,6 +28,9 @@ fn main() {
     ];
 
     let mut build = cc::Build::new();
+
+    // system_stm32u5xx.c adds SystemCoreClock, tables, etc.
+    build.file(device.join("Source/Templates/system_stm32u5xx.c"));
     for src in hal_srcs {
         build.file(hal_driver.join("Src").join(src));
     }
@@ -38,7 +42,6 @@ fn main() {
         .include(&example_inc)
         .define("USE_HAL_DRIVER", None)
         .define("STM32U575xx", None)
-        // flags
         .flag("-mthumb")
         .flag("-march=armv8-m.main+fp.dp")
         .flag("-mfloat-abi=hard")
diff --git a/semestralka_2/src/bin/main.rs b/semestralka_2/src/bin/main.rs
index 9f1d04a..ae994b5 100644
--- a/semestralka_2/src/bin/main.rs
+++ b/semestralka_2/src/bin/main.rs
@@ -20,6 +20,12 @@ bind_interrupts!(struct Irqs {
     USART1 => BufferedInterruptHandler<peripherals::USART1>;
 });
 
+unsafe extern "C" {
+    fn HAL_Init();
+    fn HAL_PWR_EnterSTANDBYMode();
+    fn HAL_PWREx_EnterSHUTDOWNMode();
+}
+
 #[embassy_executor::main]
 async fn main(spawner: Spawner) {
     info!("boot");
@@ -44,11 +50,19 @@ async fn main(spawner: Spawner) {
     spawner.spawn(uart_task(uart, &PIPE_HW_TX, &PIPE_HW_RX).unwrap());
     // END OF HARDWARE UART to the PC
 
+    unsafe {
+        HAL_Init();
+        HAL_PWR_EnterSTANDBYMode();
+
+        // Example 2 (unreachable if above executes): enter Shutdown
+        // HAL_PWREx_EnterSHUTDOWNMode();
+    }
     loop {
         info!("tick start");
         // Timer::after(Duration::from_millis(100)).await;
         // info!("tick end");
 
+
         yield_now().await;
     }
 }