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Hi,everyone ,I'm trying to access my function using its absolute address.It works when I debug it in KEIL step by step,but it jump to hard fault when runs. my code is as below:
ptr=(int(*)(int))0x240; //0x240 is the address my function locates. c=ptr(2);
And I've also met a very similar problem.The program jumps to hard fault when I have function(placed in a single file)placed in a special section .And the placement is fulfilled by sct file like this(fsk_tx.c):
; *************************************************************
LR_IROM1 0x00000000 0x00008000 { ; load region size_region ER_IROM1 0x00000000 0x00007000 { ; load address = execution address *.o (RESET, +First) *(InRoot$$Sections) .ANY (+RO)
} ER_ROM 0x00007000 0X1000 { fsk_tx.o } ER_RAM 0x1FFFFB00 0X100 {
} RW_IRAM1 0x1FFFFD00 0x00000300 { ; RW data .ANY (+RW +ZI) } RW_IRAM2 0x20000000 0x00000C00 { .ANY (+RW +ZI) *(runinram) } }
And the program works if I comment the fsk_tx.o in the sct file.
I'm really puzzled about it ,and I have to make it work soon. Thanks !
I don't know what else should I copy from.The assembly code in flash is almost the same besides address. Maybe I can transfer the question as:I want to have the function load in flash but execute in ram,meanwhile I want to know where is it loaded.Can I change the scatter file or should I get to know how does the keil do when execute __main? Thanks!