Please note: We are aware of an issue affecting replies on the Arm Community forums, which may not be loading as expected.
We apologize for any inconvenience and appreciate your patience while we investigate and work to resolve the issue.
Thank you for your understanding.
Hi, Now, I'm doing the IAP function in LPC2138 using the keil 3.05. Rebuild is ok. But when I debug it, it will have a PreFetch Abort. The wrong message is "Prefetch Abort: Thumb Instruction at 80000000H".This happens at every function about IAP ,such as ReadParID,BootCodeID and so on.
I have browsed many material from the internet without a result.
Did anybody encounter this matter?
I know from experience with the LPC2478 that trying to use external RAM as the data source for IAP will fail. One must use internal RAM.
this is iap.c
#define IAP_ENTER_ADR 0x7ffffff1 #define iap_entry(a,b) ((void(*)())(IAP_ENTER_ADR))(a,b) #define IAP_FCCLK 48000 uint32 ReadParID(void) { paramin[0] = IAP_READPARTID; iap_entry(paramin,paramout); return (paramout[0]); } this is main.c int main (void) { uint8 err; VICIntEnClr=0xffffffff; MAMCR = 0; PLLCON = 0; PLLFEED = 0xaa; PLLFEED = 0x55; err =ReadParID(); //............................. }
. When I debug to ReadRarID(),it will prefetch abort.
I choose "use thumb code".