i broke it

src/systick.c

@@ -1,32 +1,22 @@
 #include "systick.h"
 
-#include <stdint.h>
-
 #include "ch32v003fun.h"
+#include "debug.h"
 
 // ms counter
 volatile uint32_t systick_millis = 0;
 
-void systick_init(void) {
-  // Reset any pre-existing configuration
-  SysTick->CTLR = 0x0000;
-
-  // Set the compare register to trigger once per millisecond
+void init_systick(void) {
+  SysTick->CTLR = 0;
   SysTick->CMP = SYSTICK_ONE_MILLISECOND - 1;
-
-  // Reset the Count Register and variables
-  SysTick->CNT = 0x00000000;
-  systick_millis = 0x00000000;
-
-  // Set the SysTick Configuration
-  // NOTE: By not setting SYSTICK_CTLR_STRE, we maintain compatibility with
-  // busywait delay funtions used by ch32v003_fun.
-  SysTick->CTLR |= SYSTICK_CTLR_STE |   // Enable Counter
-                   SYSTICK_CTLR_STIE |  // Enable Interrupts
-                   SYSTICK_CTLR_STCLK;  // Set Clock Source to HCLK/1
+  SysTick->CNT = 0;
+  systick_millis = 0;
 
   // Enable the SysTick IRQ
+  NVIC_SetPriority(SysTicK_IRQn, 0xf0);
   NVIC_EnableIRQ(SysTicK_IRQn);
+  /* Enable SysTick counter, IRQ, HCLK/1 */
+  SysTick->CTLR = SYSTICK_CTLR_STE | SYSTICK_CTLR_STIE | SYSTICK_CTLR_STCLK;
 }
 
 /*
@@ -42,9 +32,7 @@ void SysTick_Handler(void) {
   // (Make sure the IQR is lightweight and CMP value is reasonable)
   SysTick->CMP += SYSTICK_ONE_MILLISECOND;
 
-  // Clear the trigger state for the next IRQ
-  SysTick->SR = 0x00000000;
-
-  // Increment the milliseconds count
+  // clear irq
+  SysTick->SR = 0;
   systick_millis++;
 }