Hi Barber,
Good timing of question. I've just helped someone else get this running with FSLMQX3.7 and M52259DEMO.
I found issue that I haven't found the root cause of yet but did find workaround to get the jump table working correctly.
I simple created a new "C" file to contain:
asm void jumptable(void);
extern unsigned long __boot;
#pragma define_section jump_rom ".jumprom" far_absolute R
__declspec (jump_rom) asm void jumptable(void)
{
nop
jmp __boot
}
Then added it to the application I want to load into FLASH.
The linker is updated with the following:
MEMORY
{
jumprom (RX): ORIGIN = 0x00004000, LENGTH = 0x00000010
...
KEEP_SECTION { .jumprom, .vectors_rom, .vectors_ram, .cfmconfig }
.jumprom :
{
___JUMP_ROM_START = .; # Jump table
jump_rom.c(.jumprom)
. = ALIGN (0x4);
} > jumprom
Lastly with the above changes you DO NOT need to have the following code used:
#pragma define_section jump_rom ".jump_rom" far_absolute R
__declspec(jump_rom) const unsigned char _UserEntry[] @ USER_ENTRY_ADDRESS = {
0x4E,
0x71,
0x4E,
0xF9 //asm NOP(0x4E71), asm JMP(0x4EF9)
};
__declspec(jump_rom) void (* const _UserEntry2[])()@(USER_ENTRY_ADDRESS+4)=
{
__boot,
};
This is the code snippet that doesn't seem to be working as it did with the older CW7.1. But I think my workaround is a bit more straightfoward and understandablle...at least to me.
I'm currently at a week long training event and will look to get Appnpte and other documentation generated to help others.
Hope this helps.
Regards,
David
PS
Trying to attach a ZIP that has the files I modified for my projects but if it doesn't show up its because I seem to had issues with getting attachments to load.
