ColdFire/68K Microcontrollers and ProcessorsのトピックRe: Interrupts on 5282 (VBR)

Interrupts on 5282 (VBR)

SVC1 — Thu, 29 Oct 2020 09:08:48 GMT

Hi,

When I burn my application in internal flash
at address 0x0, and copy vector table in
internal SRAM (address 0x20000000), timer
interrupt works fine.

Code:

void initialize_exceptions(void){   // Memory map definitions from linker command files used by mcf5xxx_startup   register uint32 n;    //* Copy the vector table to RAM    for (n = 0; n < 256; n++) __VECTOR_RAM[n] = (uint32)VECTOR_TABLE[n];  // __VECTOR_RAM is set to 0x20000000  mcf5xxx_wr_vbr((uint32)__VECTOR_RAM); }

When I burn the same application in internal flash
at address 0x8000, and copy vector table in
internal SRAM (address 0x20000000), timer
interrupt does NOT work.

Any clue?

Thanks,

Simon

Re: Interrupts on 5282 (VBR)

UK_CF_FAE — Tue, 10 Jun 2008 06:21:08 GMT

0x8000 is not on a 1Mbyte boundary.

Re: Interrupts on 5282 (VBR)

SVC1 — Tue, 10 Jun 2008 20:04:46 GMT

I am copying the vector table in SRAM at address 0x2000_0000 and setting the VBR to this address!

Simon

Re: Interrupts on 5282 (VBR)

JimDon — Thu, 29 Oct 2020 09:08:50 GMT

Ya, but if your vector tabel is not at 0 during a reset, not going to work.
Did you change this?

Code:

   vectorrom   (RX)  : ORIGIN = 0x00000000, LENGTH = 0x00000400