blinky size

Author: diorcety

examples/stm32f4/Cargo.toml

@@ -6,25 +6,23 @@ license = "MIT OR Apache-2.0"
 
 [dependencies]
 # Change stm32f429zi to your chip name, if necessary.
-embassy-stm32 = { version = "0.2.0", path = "../../embassy-stm32", features = ["defmt", "stm32f429zi", "unstable-pac", "memory-x", "time-driver-tim4", "exti", "chrono"] }
-embassy-sync = { version = "0.7.0", path = "../../embassy-sync", features = ["defmt"] }
-embassy-executor = { version = "0.7.0", path = "../../embassy-executor", features = ["arch-cortex-m", "executor-thread", "executor-interrupt", "defmt"] }
-embassy-time = { version = "0.4.0", path = "../../embassy-time", features = ["defmt", "defmt-timestamp-uptime", "tick-hz-32_768"] }
-embassy-usb = { version = "0.4.0", path = "../../embassy-usb", features = ["defmt" ] }
-embassy-net = { version = "0.7.0", path = "../../embassy-net", features = ["defmt", "tcp", "dhcpv4", "medium-ethernet", ] }
+embassy-stm32 = { version = "0.2.0", path = "../../embassy-stm32", features = ["stm32f401re", "unstable-pac", "memory-x", "time-driver-tim4", "exti", "chrono", "rt"], default-features = false }
+embassy-sync = { version = "0.7.0", path = "../../embassy-sync", features = [] }
+embassy-executor = { version = "0.7.0", path = "../../embassy-executor", features = ["arch-cortex-m", "executor-thread", "executor-interrupt"] }
+embassy-time = { version = "0.4.0", path = "../../embassy-time", features = ["defmt-timestamp-uptime", "tick-hz-32_768"] }
+embassy-usb = { version = "0.4.0", path = "../../embassy-usb", features = [] }
+embassy-net = { version = "0.7.0", path = "../../embassy-net", features = ["tcp", "dhcpv4", "medium-ethernet", ] }
 embassy-net-wiznet = { version = "0.2.0", path = "../../embassy-net-wiznet", features = ["defmt"] }
 embassy-futures = { version = "0.1.0", path = "../../embassy-futures" }
 
-defmt = "1.0.1"
-defmt-rtt = "1.0.0"
+panic-halt = "1.0"
 
 cortex-m = { version = "0.7.6", features = ["inline-asm", "critical-section-single-core"] }
 cortex-m-rt = "0.7.0"
 embedded-hal = "0.2.6"
 embedded-hal-bus = { version = "0.2", features = ["async"] }
 embedded-io = { version = "0.6.0" }
 embedded-io-async = { version = "0.6.1" }
-panic-probe = { version = "1.0.0", features = ["print-defmt"] }
 futures-util = { version = "0.3.30", default-features = false }
 heapless = { version = "0.8", default-features = false }
 critical-section = "1.1"
@@ -36,4 +34,8 @@ static_cell = "2"
 chrono = { version = "^0.4", default-features = false}
 
 [profile.release]
-debug = 2
+#opt-level = 1   # optimize for size
+opt-level = "s"   # optimize for size
+codegen-units = 1 # better optimizations
+debug = true      # symbols are nice and they don't increase the size on Flash
+lto = true        # better optimizations

examples/stm32f4/build.rs

@@ -1,5 +1,5 @@
 fn main() {
     println!("cargo:rustc-link-arg-bins=--nmagic");
     println!("cargo:rustc-link-arg-bins=-Tlink.x");
-    println!("cargo:rustc-link-arg-bins=-Tdefmt.x");
+//    println!("cargo:rustc-link-arg-bins=-Tdefmt.x");
 }

examples/stm32f4/src/bin/blinky.rs

@@ -1,25 +1,21 @@
 #![no_std]
 #![no_main]
 
-use defmt::*;
 use embassy_executor::Spawner;
 use embassy_stm32::gpio::{Level, Output, Speed};
 use embassy_time::Timer;
-use {defmt_rtt as _, panic_probe as _};
+use panic_halt as _;
 
 #[embassy_executor::main]
 async fn main(_spawner: Spawner) {
     let p = embassy_stm32::init(Default::default());
-    info!("Hello World!");
 
     let mut led = Output::new(p.PB7, Level::High, Speed::Low);
 
     loop {
-        info!("high");
         led.set_high();
         Timer::after_millis(300).await;
 
-        info!("low");
         led.set_low();
         Timer::after_millis(300).await;
     }