diff --git a/ch32v-insert-coin/src/main.rs b/ch32v-insert-coin/src/main.rs
index 9e6ea47..4556f25 100644
--- a/ch32v-insert-coin/src/main.rs
+++ b/ch32v-insert-coin/src/main.rs
@@ -239,6 +239,13 @@ fn systick_init(tick_freq_hz: usize) {
         w.set_stclk(ch32_hal::pac::systick::vals::Stclk::HCLK_DIV8); // HCLK/8 clock source
     });
 }
+fn systick_stop() {
+    let r = &ch32_hal::pac::SYSTICK;
+    // Reset SysTick
+    r.ctlr().write(|w| {
+        // Start with everything disabled
+    });
+}
 
 bind_interrupts!(struct Irqs {
     EXTI7_0 => Test;
@@ -561,6 +568,7 @@ use ch32_hal::timer::Channel;
 
 // fn shutdown_main(p: Peripherals) {
 fn shutdown_main(p: hal::Peripherals) {
+    systick_stop();
     // LED0 output setup
     let led0_pin = OutputOpenDrain::new(p.PC3, Level::Low, Default::default());
     let led1_pin = OutputOpenDrain::new(p.PD2, Level::High, Default::default());
@@ -595,43 +603,6 @@ fn shutdown_main(p: hal::Peripherals) {
             }
         }
     }
-
-    // loop {
-    //     unsafe {
-    //         #[allow(static_mut_refs)]
-    //         INPUT_FLAGS.sense_coin_flag.clear();
-    //         #[allow(static_mut_refs)]
-    //         INPUT_FLAGS.main_btn_flag.clear();
-    //     }
-    //     unsafe { system::enter_standby() };
-    //     riscv::asm::wfi();
-    //     unsafe {
-    //         #[allow(static_mut_refs)]
-    //         if (INPUT_FLAGS.sense_coin_flag.active()
-    //             || (INPUT_FLAGS.main_btn_flag.active() && main_btn_input.is_high_immediate()))
-    //             && app.should_wake()
-    //         {
-    //             break;
-    //         }
-    //     }
-    // }
-    // let mut config = hal::Config::default();
-    // config.rcc = hal::rcc::Config::SYSCLK_FREQ_48MHZ_HSI;
-    // unsafe {
-    //     hal::rcc::init(config.rcc);
-    // }
-    // unsafe {
-    //     use hal::pac::Interrupt;
-    //     use qingke::interrupt::Priority;
-    //     use qingke_rt::CoreInterrupt;
-
-    //     system::clear_interrupt(2, 6);
-
-    //     qingke::pfic::set_priority(CoreInterrupt::SysTick as u8, Priority::P15 as u8);
-
-    //     qingke::pfic::enable_interrupt(Interrupt::EXTI7_0 as u8);
-    //     qingke::pfic::enable_interrupt(CoreInterrupt::SysTick as u8);
-    // }
 }
 
 #[qingke_rt::entry]