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TMS320F2812: TMS320F2812芯片程序跑飞的问题

Part Number: TMS320F2812

使用2812做开发,原程序中有CPU_Timer0固定周期的定时器中断,以及SCIA/B串口通信中断和上位机实时通信,原程序运行稳定。

新程序增加了PWM,T1PINT和T3PINT两个中断,有时程序会正常运行一段时间后跑飞,请问出现这个原因是什么?