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程序运行到ramErrorReal,是什么原因导致?

我在使用TMS570 调用Fapi_doMarginReadByByte()函数时,程序不能运行到该函数结束的断点,而是运行到

ramErrorReal
           b          ramErrorReal ;// branch here forever as continuing operation is not recommended

想请问dabort.asm文件中的程序的大概功能,什么情况下可能导致这些异常,我查询了手册关于exception的讲述,但不是很懂,有可以借鉴的其他中文说明吗?