添加一些关于midi播放的项目

2025-03-24 14:30:56 +08:00
parent e31eb22077
commit 498b4ef13b
699 changed files with 186162 additions and 1 deletions
@@ -0,0 +1,89 @@
+/******************************************************************************
+*
+* @brief provide systick utility routines.
+*
+*******************************************************************************/
+
+#include "common.h"
+#include "systick.h"
+//#include "stdint.h"
+uint32_t cnt_start_value;
+uint32_t cnt_end_value;
+uint32_t overhead;
+SysTick_CallbackType SysTick_Callback[1] = {NULL};
+#if 0
+  __IO uint32_t CTRL;                    /*!< Offset: 0x000 (R/W)  SysTick Control and Status Register */
+  __IO uint32_t LOAD;                    /*!< Offset: 0x004 (R/W)  SysTick Reload Value Register       */
+  __IO uint32_t VAL;                     /*!< Offset: 0x008 (R/W)  SysTick Current Value Register      */
+  __I  uint32_t CALIB;                   /*!< Offset: 0x00C (R/ )  SysTick Calibration Register        */
+#endif
+void systick_init(void)
+{
+  
+	  SysTick->VAL = 0x0;	/* clear current ETMer value */
+    SysTick->LOAD = 0x00FFFFFF;
+    SysTick->CTRL = SysTick_CTRL_CLKSOURCE_Msk | SysTick_CTRL_ENABLE_Msk;   
+}
+
+void SysTick_SetCallBack(SysTick_CallbackType pSysTick_CallBack)
+{
+    SysTick_Callback[0] = pSysTick_CallBack;
+}
+
+/***
+void delay_us(int n)//微秒级别的延时
+{		
+	int temp;	    	 
+	SysTick->LOAD= 48 *n; //????	  		 
+	SysTick->VAL=0x00000000;        //?????
+	SysTick->CTRL=0x00000005;
+  while(SysTick->CTRL&0x00010000);	//???? 	 
+	SysTick->CTRL=0x00000004;
+}
+***/
+
+/****
+void delay_ms(int n)//毫秒级别的延时
+{		
+	int temp;	    	 
+	SysTick->LOAD= 48000 *n; //????	  		 
+	SysTick->VAL=0x00000000;        //?????
+	SysTick->CTRL=0x00000005;
+  while(SysTick->CTRL&0x00010000);	//???? 	 
+	SysTick->CTRL=0x00000004;
+}******////
+
+void systick_disable(void)
+{
+    SysTick->CTRL &= ~SysTick_CTRL_ENABLE_Msk;
+}
+
+void cal_systick_read_overhead(void)
+{
+  	uint32_t cnt_start_value;
+    uint32_t cnt_end_value;
+	
+	cnt_start_value = SysTick->VAL;
+  
+    cnt_end_value = SysTick->VAL;
+	
+	overhead = cnt_start_value - cnt_end_value;
+	
+#ifdef DEBUG_PRINT
+	printf("systick start value: 0x%x\n\r", (unsigned int)cnt_start_value);
+	printf("systick end value: 0x%x\n\r", (unsigned int) cnt_end_value);
+	printf("systick current value read overhead: 0x%x\n\r", (unsigned int)overhead);
+#endif
+
+}
+
+
+void SysTick_Isr(void)
+{ 
+	//printf("input any character to start a new conversion!\n");
+    if( SysTick_Callback[0] )
+    {
+        SysTick_Callback[0]();
+    }
+}
+