第一次提交

2026-04-09 10:14:20 +08:00
commit e325a77b42
584 changed files with 279711 additions and 0 deletions
--- a/Common/systick.c
+++ b/Common/systick.c
@@ -0,0 +1,58 @@
+#include "systick.h"
+
+
+__IO uint64_t g_system_tick = 0;
+
+void systick_config(void)
+{
+		/* setup systick timer for 1000Hz interrupts */
+    if(SysTick_Config( system_core_clock / 1000U)) {
+        /* capture error */
+        while(1) {
+        }
+    }
+    /* configure the systick handler priority */
+    NVIC_SetPriority(SysTick_IRQn, 0x00U);
+}
+
+
+
+uint64_t get_system_tick(void)
+{
+		return g_system_tick;
+}
+
+void delay_us(uint32_t _us)
+{
+		uint32_t ticks;
+    uint32_t told, tnow, tcnt = 0;
+
+    // <20><><EFBFBD><EFBFBD><EFBFBD><EFBFBD>Ҫ<EFBFBD><D2AA>ʱ<EFBFBD><CAB1><EFBFBD><EFBFBD> = <20>ӳ<EFBFBD>΢<EFBFBD><CEA2><EFBFBD><EFBFBD> * ÿ΢<C3BF><CEA2><EFBFBD><EFBFBD>ʱ<EFBFBD><CAB1><EFBFBD><EFBFBD>
+    ticks = _us * (SystemCoreClock / 1000000);
+
+    // <20><>ȡ<EFBFBD><C8A1>ǰ<EFBFBD><C7B0>SysTickֵ
+    told = SysTick->VAL;
+
+    while (1)
+    {
+        // <20>ظ<EFBFBD>ˢ<EFBFBD>»<EFBFBD>ȡ<EFBFBD><C8A1>ǰ<EFBFBD><C7B0>SysTickֵ
+        tnow = SysTick->VAL;
+
+        if (tnow != told)
+        {
+            if (tnow < told)
+                tcnt += told - tnow;
+            else
+                tcnt += SysTick->LOAD - tnow + told;
+
+            told = tnow;
+
+            // <20><><EFBFBD><EFBFBD><EFBFBD>ﵽ<EFBFBD><EFB5BD><EFBFBD><EFBFBD>Ҫ<EFBFBD><D2AA>ʱ<EFBFBD><CAB1><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>˳<EFBFBD>ѭ<EFBFBD><D1AD>
+            if (tcnt >= ticks)
+                break;
+        }
+    }
+}
+
+void delay_ms(uint32_t _ms) { delay_us(_ms * 500); }
+