spectrum70
Newbie level 4
Hello all,
i have developed a little custom board, with a MCF5307, a 16x2MB (word programmable) parallel flash (SST39VF3201B), a 16MegB. SDRAM and some other peripheral.
Anyway, since this is one of my first quite big embedded circuit development, i connected for error the flash memory address bus with A0 -> A0 of the micro, A1->A1, A2->A2 ... instead of A0 to A1, A1->A2 etc.
Running through codewarrior/BDM from internal ram i can read and write it anyway using some C cast + byte swap, like below:
Anyway, i am quite sure that, even if i program the flash, the MCF5307 will not be able to boot reading from the flash.
The board is just a prototype, but anyway, if someone know of some trick for the boot, this is really appreciated.
Many thanks in advance,
Angelo
i have developed a little custom board, with a MCF5307, a 16x2MB (word programmable) parallel flash (SST39VF3201B), a 16MegB. SDRAM and some other peripheral.
Anyway, since this is one of my first quite big embedded circuit development, i connected for error the flash memory address bus with A0 -> A0 of the micro, A1->A1, A2->A2 ... instead of A0 to A1, A1->A2 etc.
Running through codewarrior/BDM from internal ram i can read and write it anyway using some C cast + byte swap, like below:
Code:
volatile unsigned char* baseaddress = 0xFFC0;
unsigned short test = *(unsigned short*)(baseaddress);
// test then need to be swapped to read the correct value
.....Anyway, i am quite sure that, even if i program the flash, the MCF5307 will not be able to boot reading from the flash.
The board is just a prototype, but anyway, if someone know of some trick for the boot, this is really appreciated.
Many thanks in advance,
Angelo
