中断遇到问题，请大侠帮助

sjpu

我最近用103ret6，自己做的板子，调试时系统中断不好用，SysTick和其他的IRQ都不能产生中断。但知不道原因。
请求大侠帮帮忙。以SysTick为例，配置如下：

/* ##################################    SysTick function  ############################################ */
//========================位于core_cm3.h文件==================================

/* SysTick constants */
#define SYSTICK_ENABLE              0                                          /* Config-Bit to start or stop the SysTick Timer                         */
#define SYSTICK_TICKINT             1                                          /* Config-Bit to enable or disable the SysTick interrupt                 */
#define SYSTICK_CLKSOURCE           2                                          /* Clocksource has the offset 2 in SysTick Control and Status Register   */
#define SYSTICK_MAXCOUNT       ((1LOAD  =  (ticks & SYSTICK_MAXCOUNT) - 1;                                         /* set reload register */
  NVIC_SetPriority (SysTick_IRQn, (1CTRL = (1