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TMS570LC4357: 程序运行时跳转到 HL_sys_intvecs.asm里的 b dataEntry

Part Number: TMS570LC4357
Other Parts Discussed in Thread: TMDX570LC43HDK

用的是官方开发套件TMDX570LC43HDK, 前面的程序功能,使得在某个内存区域的连续8个字节存的是一个double型数据(位于RAM区),只是目前只有一个uinit8* 指针DataPtr 指向它,接下来我想提取这个浮点数,于是先

double* ptoDouble = (double*)(DataPtr);  再执行  double tmp = *ptoDouble; 这一句时程序跳转到 HL_sys_intvecs.asm里的 b dataEntry,请问这是什么类型错误,该怎么解决?