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pga900 IAR 调试 问题

Other Parts Discussed in Thread: PGA900

IAR下,PGA900软件写好,REMAP定位后,用j_link下载程序到DEVRAM (0X21000000)正常,中断向量也正常。DEBUG调试主程序执行正常,可用GPIO输出测试证明。问题是一打开中断(现在也只允许PADC和TADC)程序就飞了,

提示

    HardFault exception.

    Exception occured at PC = 0x0, LR = 0xfffffff9

肯定是没有进入正常的中断服务程序,因为中断里设置断点根本没用,这是怎么回事呀?怎么解决这个问题?