MPC5xxx中的主题 Re: Flash MPC55xx

Flash MPC55xx

joesmith — Thu, 21 Mar 2013 12:04:42 GMT

Hi Can Anyone give me some advice on how to program me the flash on mpc55xx, in C.

I have the following code

main()

{

unsigned long* FlashRegister ;

FLASH.HLR.R = 0xB2B22222;

FLASH.HLR.B.HBLOCK = 0b1;

FLASH.HSR.B.HBSEL = 0b1;

FlashRegister = ((unsigned long*)(0x80000));

FLASH.MCR.B.PGM = 1;

*(FlashRegister) = 5;

FLASH.MCR.B.EHV = 1;

while(FLASH.MCR.B.DONE == 0)

{

}

FLASH.MCR.B.EHV = 0;

FLASH.MCR.B.PGM = 0;

}

but when i try and read the address back it still says its 0xffffffff.

It properly something really stupid.

Cheers

Joe

lukaszadrapa — Wed, 17 Apr 2013 16:04:22 GMT

Probably too late but:

FLASH.HLR.B.HBLOCK = 0b1;

"1" means the flash block is locked

"0" means the block can be erase/programmed.

So, it should be changed to:

FLASH.HLR.B.HBLOCK = 0b0; //unlock all high blocks

If you program the flash, it is not necessary to set the HSR register. This line can be deleted:

FLASH.HSR.B.HBSEL = 0b1;

jonr — Mon, 13 May 2013 13:27:36 GMT

You can go to:

for some working flash burning code.