diff --git a/firmware/src/main.rs b/firmware/src/main.rs
index d03a242..617a03f 100644
--- a/firmware/src/main.rs
+++ b/firmware/src/main.rs
@@ -3,9 +3,46 @@
 
 use ch32v00x_hal as hal;
 
+use hal::debug::SDIPrint;
+use hal::gpio::PinState;
+use hal::i2c::{I2c, I2cConfig};
+use hal::pac::Peripherals;
+use hal::prelude::*;
+use hal::serial::Config as SerialConfig;
+
 use panic_halt as _;
 
 #[qingke_rt::entry]
 fn main() -> ! {
+    SDIPrint::enable();
+
+    let p = Peripherals::take().unwrap();
+
+    let mut rcc = p.RCC.constrain();
+    let clocks = rcc.config.freeze();
+
+    let gpioa = p.GPIOA.split(&mut rcc);
+    let mut _fan = gpioa.pa2.into_push_pull_output_in_state(PinState::High);
+
+    let gpioc = p.GPIOC.split(&mut rcc);
+    let _i2c = I2c::i2c1(
+        p.I2C1,
+        gpioc.pc2.into_alternate_open_drain(),
+        gpioc.pc1.into_alternate_open_drain(),
+        I2cConfig::fast_mode(),
+        &mut rcc,
+        &clocks,
+    );
+    let mut _tec = gpioc.pc4.into_push_pull_output();
+
+    let gpiod = p.GPIOD.split(&mut rcc);
+    let mut _usart = p.USART1.usart(
+        gpiod.pd5.into_alternate(),
+        gpiod.pd6.into_floating_input(),
+        SerialConfig::default(),
+        &mut rcc,
+        &clocks,
+    );
+
     loop {}
 }