the led isn't lighting up :'(

.cargo/config.toml

@@ -1,33 +1,10 @@
-[target.thumbv7m-none-eabi]
-# uncomment this to make `cargo run` execute programs on QEMU
-# runner = "qemu-system-arm -cpu cortex-m3 -machine lm3s6965evb -nographic -semihosting-config enable=on,target=native -kernel"
+[build]
+target = "thumbv7em-none-eabihf"
 
-[target.'cfg(all(target_arch = "arm", target_os = "none"))']
-# uncomment ONE of these three option to make `cargo run` start a GDB session
-# which option to pick depends on your system
-# runner = "arm-none-eabi-gdb -q -x openocd.gdb"
-# runner = "gdb-multiarch -q -x openocd.gdb"
-# runner = "gdb -q -x openocd.gdb"
+[target.thumbv7em-none-eabihf]
+# Using probe-rs for flashing
+runner = "probe-rs run --chip STM32F469NIx"
 
 rustflags = [
-  # LLD (shipped with the Rust toolchain) is used as the default linker
-  "-C", "link-arg=-Tlink.x",
-
-  # if you run into problems with LLD switch to the GNU linker by commenting out
-  # this line
-  # "-C", "linker=arm-none-eabi-ld",
-
-  # if you need to link to pre-compiled C libraries provided by a C toolchain
-  # use GCC as the linker by commenting out both lines above and then
-  # uncommenting the three lines below
-  # "-C", "linker=arm-none-eabi-gcc",
-  # "-C", "link-arg=-Wl,-Tlink.x",
-  # "-C", "link-arg=-nostartfiles",
+    "-C", "link-arg=-Tlink.x",
 ]
-
-[build]
-# Pick ONE of these compilation targets
-# target = "thumbv6m-none-eabi"    # Cortex-M0 and Cortex-M0+
-# target = "thumbv7m-none-eabi"    # Cortex-M3
-target = "thumbv7em-none-eabi"   # Cortex-M4 and Cortex-M7 (no FPU)
-# target = "thumbv7em-none-eabihf" # Cortex-M4F and Cortex-M7F (with FPU)

Cargo.lock

@@ -259,6 +259,12 @@ version = "0.2.1"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "c6673768db2d862beb9b39a78fdcb1a69439615d5794a1be50caa9bc92c81967"
 
+[[package]]
+name = "panic-halt"
+version = "1.0.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "a513e167849a384b7f9b746e517604398518590a9142f4846a32e3c2a4de7b11"
+
 [[package]]
 name = "panic-probe"
 version = "1.0.0"
@@ -385,6 +391,7 @@ dependencies = [
  "defmt",
  "defmt-rtt",
  "embedded-hal 1.0.0",
+ "panic-halt",
  "panic-probe",
  "stm32f4xx-hal",
 ]

Cargo.toml

@@ -10,11 +10,16 @@ embedded-hal = "1.0.0"
 defmt-rtt = "1.1.0"
 defmt = "1.0.1"
 panic-probe = {version = "1.0.0", features = ["print-defmt"]}
+panic-halt = "1.0.0"
 
 [dependencies.stm32f4xx-hal]
 version = "0.23.0"
 features = ["stm32f469"]
 
+[features]
+default = []
+ccmram = []
+
 [[bin]]
 name = "stm32f469ni"
 test = false

build.rs

@@ -0,0 +1,19 @@
+// I totally understand this and it's not copied from
+// https://github.com/cyang812/rust_stm32f469i/blob/main/led_blinky/
+// hehe
+use std::env;
+use std::fs;
+use std::path::PathBuf;
+
+fn main() {
+    let out = &PathBuf::from(env::var_os("OUT_DIR").unwrap());
+    fs::write(out.join("memory.x"), include_bytes!("memory.x")).unwrap();
+    println!("cargo:rustc-link-search={}", out.display());
+
+    // Only link CCM script when the feature is enabled.
+    // Enable with: cargo build --features ccmram
+    if env::var_os("CARGO_FEATURE_CCMRAM").is_some() {
+        fs::write(out.join("ccmram.x"), include_bytes!("ccmram.x")).unwrap();
+        println!("cargo:rustc-link-arg=-Tccmram.x");
+    }
+}

ccmram.x

@@ -0,0 +1,10 @@
+/* Extra linker script to place data into CCM SRAM */
+SECTIONS
+{
+    .ccmram (NOLOAD) :
+    {
+        . = ALIGN(4);
+        *(.ccmram .ccmram.*)
+        . = ALIGN(4);
+    } > CCMRAM
+} INSERT AFTER .rodata;

memory.x

@@ -1,37 +1,12 @@
+/* Memory layout of the STM32F469NI */
 MEMORY
 {
-  /* NOTE 1 K = 1 KiBi = 1024 bytes */
-  
-  /* STM32F302R8T6 from STM32F302R8Tx_FLASH.ld in the STM32Cube archive */
-  /* or the reference doc at */
-  /* https://www.st.com/en/microcontrollers-microprocessors/stm32f302.html#resource */
-
-  FLASH : ORIGIN = 0x08000000, LENGTH = 2M 
-  RAM : ORIGIN = 0x20000000, LENGTH = 320k
+    FLASH : ORIGIN = 0x08000000, LENGTH = 2048K
+    RAM : ORIGIN = 0x20000000, LENGTH = 256K
+    /* Core Coupled Memory (CCM) SRAM: 128KB at 0x10000000 */
+    CCMRAM : ORIGIN = 0x10000000, LENGTH = 128K
 }
 
 /* This is where the call stack will be allocated. */
-/* The stack is of the full descending type. */
-/* You may want to use this variable to locate the call stack and static
-   variables in different memory regions. Below is shown the default value */
-/* _stack_start = ORIGIN(RAM) + LENGTH(RAM); */
-
-/* You can use this symbol to customize the location of the .text section */
-/* If omitted the .text section will be placed right after the .vector_table
-   section */
-/* This is required only on microcontrollers that store some configuration right
-   after the vector table */
-/* _stext = ORIGIN(FLASH) + 0x400; */
-
-/* Example of putting non-initialized variables into custom RAM locations. */
-/* This assumes you have defined a region RAM2 above, and in the Rust
-   sources added the attribute `#[link_section = ".ram2bss"]` to the data
-   you want to place there. */
-/* Note that the section will not be zero-initialized by the runtime! */
-/* SECTIONS {
-     .ram2bss (NOLOAD) : ALIGN(4) {
-       *(.ram2bss);
-       . = ALIGN(4);
-     } > RAM2
-   } INSERT AFTER .bss;
-*/
+/* The stack is of the full size of the RAM, minus the size of the .data section */
+_stack_start = ORIGIN(RAM) + LENGTH(RAM);

src/main.rs

@@ -4,7 +4,7 @@ use cortex_m_rt::entry;
 use defmt_rtt as _;
 use hal::prelude::*;
 use panic_probe as _;
-use stm32f4xx_hal as hal;
+use stm32f4xx_hal::{self as hal, ltdc::DisplayController};
 
 defmt::timestamp!("{=u32}", 0u32);
 
@@ -14,6 +14,7 @@ fn main() -> ! {
     let mut rcc = peripherals.RCC.constrain();
     let ltdc = peripherals.LTDC;
     let dma2d = peripherals.DMA2D;
+
     let display_config = hal::ltdc::DisplayConfig {
         active_width: 480,
         active_height: 800,
@@ -30,7 +31,7 @@ fn main() -> ! {
         pixel_clock_pol: false,
     };
 
-    let display = hal::ltdc::DisplayController::new(
+    let mut display: DisplayController<u8> = hal::ltdc::DisplayController::new(
         ltdc,
         dma2d,
         None,
@@ -39,11 +40,26 @@ fn main() -> ! {
         None,
     );
 
+    display.draw_pixel(hal::ltdc::Layer::L1, 50, 50, 1);
+
     let gpiog = peripherals.GPIOG.split(&mut rcc);
+    let gpiod = peripherals.GPIOD.split(&mut rcc);
 
     let mut led1 = gpiog.pg6.into_push_pull_output();
+    let mut led2 = gpiod.pd4.into_push_pull_output();
 
-    led1.set_high();
+    led1.set_low();
+    led2.set_low();
 
-    loop {}
+    loop {
+        for _ in 0..100000 {
+            led1.set_low();
+            led2.set_high();
+        }
+
+        for _ in 0..100000 {
+            led1.set_high();
+            led2.set_low();
+        }
+    }
 }