TI中文支持网Other Parts Discussed in Thread:TMS570LS1227
请问TMS570LS1227芯片内部是否有软件陷阱中断？如计算除法时，除数是0产生了错误，堆栈溢出时……等此类问题是否会产生错误的中断？
Susan Yang：
TMS570LS1227的话，这些软件陷阱中断是包含在ARM® Cortex®-R4F的处理中的
如除数是0等许多FPU错误情况，ARM提供可屏蔽的CPU输出，然后TI将这些输出组合并连接到VIM中断控制器。如果启用，FP除以零将导致在FPDZC CPU输出上驱动输出，然后将导致对VIM 47号线的中断请求（FPU中断）。
Table 4-25 Secondary Auxiliary Control Register bit functions
为了在FPU中生成未定义的异常，ARM在R4 TRM中给出了一些提示：
section 12.1.1 – "Any data processing instruction that operates on a vector generates an UNDEFINED exception."
section 12.1.2 – "An instruction which attempts to access any of the registers D16-D31 generates an UNDEFINED exception"
section 12.3 – "When a privileged mode is required, an instruction that attempts to access a register in a nonprivileged mode takes the UNDEFINED exception"
section 12.3.3 – "Clearing EN disables VFP functionality, causing all VFP instructions apart from privileged system register accesses to generate an UNDEFINED exception"建议尝试使用ARM指出的任何一种情况来生成异常。
DDI0363E_cortexr4_r1p3_trm.pdf
