ARM Simulator: Reset Vector Address

Hi Per,

I use a "simulator.ini", currently containing that:

MAP  0x40000000, 0x4000FFFF READ WRITE EXEC       //SRAM intern
MAP  0x80000000, 0x800FFFFF READ EXEC             //Flash Code
MAP  0x82000000, 0x820FFFFF READ WRITE EXEC       //SRAM extern

FUNC void Setup (void) {

  PC = 0x80000000;
}

Setup();

After entering the debug mode, the program counter starts at the right position, but when I make a reset the PC starts at 0.

Best regards
DW

Of course. The processor _always_ starts at address 0 after reset. So you either store a boot loader at the start of the flash, or you make sure to always run your ini script before starting to debug.

Next thing is that the application needs to remap the vector table into RAM, because the other vectors are also at the start of flash. The remap register maps a couple of bytes of RAM to overlap the flash address range - but the remap register gets reset to default too when you reset the processor.

The LPC2220 has no memory at address 0, cause it's a flashless device. It has two boot pins for the configuration of the external memory bank at 0x80000000. So the device boots from that address and the exception vectors are also in that address area.

BR
DW

I would say the simulator ignores the settings I made under
OptionsForTheTarget/Target/ReadOnlyMemoryAreas:

I checked ROM1, start at 0x80000000, Size 0x800000, and I also set the startup radio button for that entry. Why doesn't the compiler use that memory area for startup? I did not specify any further ROM area.

Does anyone know how to handle this without writing a simulator specific application?

BR
Detlef