添加一些关于midi播放的项目

Midi/music-box-nv32-master/nv32lib/common/system_nv32.c

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+/*
+** ###################################################################
+ * @brief Device specific configuration file for MKE02Z2 (implementation file)
+ *
+ * Provides a system configuration function and a global variable that contains
+ * the system frequency. It configures the device and initializes the oscillator
+ * (PLL) that is part of the microcontroller device.
+ */
+
+#include <stdint.h>
+#include "NV32F100.h"
+
+#define DISABLE_WDOG                    1
+
+#define DEFAULT_SYSTEM_CLOCK            20971520u /* Default System clock value */
+
+
+/* ----------------------------------------------------------------------------
+   -- Core clock
+   ---------------------------------------------------------------------------- */
+
+uint32_t SystemCoreClock = DEFAULT_SYSTEM_CLOCK;
+
+/* ----------------------------------------------------------------------------
+   -- SystemInit()
+   ---------------------------------------------------------------------------- */
+#define WDOG_TOVAL                               *((volatile uint16_t *)(&WDOG->TOVALH))
+#define WDOG_CNT                                 *((volatile uint16_t *)(&WDOG->CNTH))
+
+void SystemInit (void) {
+#if (DISABLE_WDOG)
+  /* Disable the WDOG module */
+  WDOG_CNT   = 0x20C5; 
+  WDOG_CNT   = 0x28D9;
+  WDOG_TOVAL = 0xFFFF;
+    //WDOG_WIN = 0; /* NOTE: this will cause HARDFAULT error*/
+  WDOG->WINH = 0xFF;
+  WDOG->WINL = 0xFF;
+
+  WDOG->CS2 = 0x01;
+  WDOG->CS1 = 0x20; /* WDOGA = 1 to allow reconfigure watchdog at any time by executing an unlock sequence */
+#endif
+}
+
+/* ----------------------------------------------------------------------------
+   -- SystemCoreClockUpdate()
+   ---------------------------------------------------------------------------- */
+
+void SystemCoreClockUpdate (void) {
+}