feat: it blinks super slow!

Cargo.lock

@@ -61,7 +61,6 @@ checksum = "8ec610d8f49840a5b376c69663b6369e71f4b34484b9b2eb29fb918d92516cb9"
 dependencies = [
  "bare-metal 0.2.5",
  "bitfield",
- "critical-section",
  "embedded-hal",
  "volatile-register",
 ]
@@ -86,12 +85,6 @@ dependencies = [
  "syn",
 ]
 
-[[package]]
-name = "critical-section"
-version = "1.2.0"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "790eea4361631c5e7d22598ecd5723ff611904e3344ce8720784c93e3d83d40b"
-
 [[package]]
 name = "embedded-hal"
 version = "0.2.7"
@@ -130,10 +123,8 @@ checksum = "8d5439c4ad607c3c23abf66de8c8bf57ba8adcd1f129e699851a6e43935d339d"
 name = "nucleo-l053r8-blink"
 version = "0.1.0"
 dependencies = [
- "cortex-m",
  "cortex-m-rt",
- "panic-rtt-target",
+ "panic-halt",
- "rtt-target",
  "stm32l0xx-hal",
 ]
 
@@ -200,14 +191,10 @@ dependencies = [
 ]
 
 [[package]]
-name = "panic-rtt-target"
+name = "panic-halt"
-version = "0.1.3"
+version = "1.0.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "608d1d809dd8960d5e8364981279c7ab280a13d98b99eae049885a7ab2b1cbfe"
+checksum = "a513e167849a384b7f9b746e517604398518590a9142f4846a32e3c2a4de7b11"
-dependencies = [
- "critical-section",
- "rtt-target",
-]
 
 [[package]]
 name = "proc-macro2"
@@ -236,16 +223,6 @@ dependencies = [
  "chrono",
 ]
 
-[[package]]
-name = "rtt-target"
-version = "0.5.0"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "10b34c9e6832388e45f3c01f1bb60a016384a0a4ad80cdd7d34913bed25037f0"
-dependencies = [
- "critical-section",
- "ufmt-write",
-]
-
 [[package]]
 name = "rustc_version"
 version = "0.2.3"
@@ -317,12 +294,6 @@ dependencies = [
  "unicode-ident",
 ]
 
-[[package]]
-name = "ufmt-write"
-version = "0.1.0"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "e87a2ed6b42ec5e28cc3b94c09982969e9227600b2e3dcbc1db927a84c06bd69"
-
 [[package]]
 name = "unicode-ident"
 version = "1.0.18"

Cargo.toml

@@ -3,27 +3,11 @@ name = "nucleo-l053r8-blink"
 version = "0.1.0"
 edition = "2024"
 
+
 [dependencies]
-cortex-m = { version = "0.7.7", features = ["critical-section-single-core"] }
+cortex-m-rt = "0.7.5"
-cortex-m-rt = "0.7.3"
+panic-halt = "1.0.0"
-panic-rtt-target = "0.1.3"
+stm32l0xx-hal = { version = "0.10.0", features = [
-rtt-target = "0.5.0"
-hal = { package = "stm32l0xx-hal", version = "0.10.0", features = [
-	"rt",
-	# "stm32l0x3",
-	# "flash-192",
-	# "ram-20",
-	# "io-STM32L051",
-	# "mcu-STM32L053R8", # does not exist in that crate
-	# "disable-linker-script",
 	"mcu-STM32L053R8Hx",
-] }
+	"rt",
-
+] } # mcu-STM32L053R8Hx or mcu-STM32L053R8Tx not sure
-[[bin]]
-name = "nucleo-l053r8-blink"
-test = false
-bench = false
-
-[profile.release]
-opt-level = 'z' # turn on maximum optimizations. We only have 64kB
-lto = true      # Link-time-optimizations for further size reduction

Embed.toml

@@ -1,13 +0,0 @@
-# i dont think this is used anywhere but am paranoid
-
-[default.general]
-chip = "STM32L053R8"
-
-[default.rtt]
-enabled = true
-
-[default.probe]
-protocol = "Swd"
-
-[default.gdb]
-enabled = false

build.rs

@@ -1,17 +1,3 @@
-use std::env;
-use std::fs::File;
-use std::io::Write;
-use std::path::PathBuf;
-
 fn main() {
-    // Put the linker script somewhere the linker can find it
+    println!("cargo:rustc-link-arg-bins=-Tlink.x");
-    let out = &PathBuf::from(env::var_os("OUT_DIR").unwrap());
-    File::create(out.join("memory.x"))
-        .unwrap()
-        .write_all(include_bytes!("memory.x"))
-        .unwrap();
-    println!("cargo:rustc-link-search={}", out.display());
-
-    println!("cargo:rerun-if-changed=build.rs");
-    println!("cargo:rerun-if-changed=memory.x");
 }

memory.x

@@ -1,8 +0,0 @@
-# FLASH 0x08000000 - 0x0802FFFF 192K
-# RAM   0x20000000 - 0x20004FFF 20K
-
-MEMORY
-{
-  FLASH : ORIGIN = 0x08000000, LENGTH = 192K
-  RAM   : ORIGIN = 0x20000000, LENGTH = 20K
-}

src/main.rs

@@ -1,20 +1,12 @@
-#![no_std]
+#![deny(unsafe_code)]
 #![no_main]
+#![no_std]
 
-// We need to use cortex_m here so the linker can find it's critical-section, but we import is as
+extern crate panic_halt;
-// an underscore since we don't directly use any of its symbols.
-extern crate cortex_m;
 
-// The entry import gives us a macro to indicate where the microcontroller should start the
-// program, and also sets up the FPU on our Cortex-M4F.
 use cortex_m_rt::entry;
+use stm32l0xx_hal::{pac, prelude::*, rcc::Config};
 
-use hal::{pac, prelude::*, rcc::Config};
-// Provides functions that allow printing back to probe-rs.
-use panic_rtt_target as _;
-// use rtt_target::{rprintln, rtt_init_print};
-
-// Start here, and don't ever return from this function.
 #[entry]
 fn main() -> ! {
     let dp = pac::Peripherals::take().unwrap();
@@ -27,7 +19,7 @@ fn main() -> ! {
     let gpioa = dp.GPIOA.split(&mut rcc);
 
     // Configure PA1 as output.
-    let mut led = gpioa.pa3.into_push_pull_output();
+    let mut led = gpioa.pa5.into_push_pull_output();
 
     loop {
         // Set the LED high one million times in a row.