EEPW论坛

多谢amine老大的回复.

年月久远,amine老大也有记混的时候啊，呵呵.

excVecInit()函数是有意义的,之前的那个intVecBaseSet()没什么用处.

我在网上也找到了excVecInit()函数的实现,但里面还有对局部全局变量_func_armIrqHandler 的初始化,不然自己直接定义这个函数替掉得了,让我真是恨的牙痒痒的.不知道谁能够提供excVecInit()函数所在的完整c文件么?非常感谢!

STATUS excVecInit (void) { FAST int i; /* initialise ARM exception mode registers */ armInitExceptionModes (); /* initialise hardware exception vectors */ for (i = 0; i < NUM_EXC_VECS; ++i) { /* * Each vector contains a LDR PC,[PC,#offset] instruction to * load the PC from a table of addresses stored at * EXC_VEC_TABLE_BASE. This allows full 32 bit addressing rather * than 12 bit (MOV #) or 24 bit (B). */ *(UINT32 *)excEnterTbl.vecAddr = 0xE59FF000 | (EXC_VEC_TABLE_BASE - 8 - FIRST_VECTOR); *(VOIDFUNCPTR *) (excEnterTbl.vecAddr + EXC_VEC_TABLE_BASE - FIRST_VECTOR) = excEnterTbl.fn; } /* * Branch through zero has to be handled differently if it is * possible for address 0 to be be branched to in ARM and Thumb * states (no LDR pc,[pc,#n] in Thumb state). The following * instruction, installed at address 0, will cause an undefined * instruction exception in both ARM and Thumb states. */ *(UINT32 *)EXC_OFF_RESET = 0xE7FDDEFE; /* now sort out the instruction cache to reflect the changes */ CACHE_TEXT_UPDATE(EXC_OFF_RESET, EXC_OFF_IRQ + 4); /* install default IRQ handler */ _func_armIrqHandler = excIntHandle; return OK; }