MPC5xxx中的主题 Re: DFlash writing MPC560D40

DFlash writing MPC560D40

liviuc — Tue, 04 Oct 2016 13:09:56 GMT

Hello,

How is it possible to write 64 bit in the DFLASH with one High Voltage operation?

I try like this:

PGM = 1

(0x00800000) = 0x1122334455667788;

EHV = 1

wait for DONE

EHV = 0

PGM = 0

The result is:

0x00800000 = 0xFFFFFFFF;

0x00800004 = 0x11223344;

What am I doing wrong?

I know that on the 5604 the writing was possible and since it is the same architecture it should be pretty straight forward. Also, the datasheet specifies it is possible (check attachment).

Thank you for your support.

Re: DFlash writing MPC560D40

lukaszadrapa — Tue, 11 Oct 2016 06:00:14 GMT

Hi,

this piece of code works as expected:

/* unlock */
DFLASH.LML.R = 0xA1A11111;   //write password
DFLASH.LML.R = 0x00000000;   //unlock all 4 16k blocks
DFLASH.SLL.R = 0xC3C33333;   //write password
DFLASH.SLL.R = 0x00000000;   //unlock all 4 16k blocks

/* erase */
DFLASH.MCR.B.ERS = 1;   //erase operation
DFLASH.LMS.R = 0xF;       //select all 4 block for erase
*(unsigned int *)0x00800000 = 0xFFFFFFFF;   //interlock write
DFLASH.MCR.B.EHV = 1;   while(DFLASH.MCR.B.DONE == 0);
DFLASH.MCR.B.EHV = 0;
DFLASH.MCR.B.ERS = 0;

/* program one double word */
DFLASH.MCR.B.PGM = 1;   //erase operation
*(unsigned int *)0x00800000 = 0xAABBCCDD;   //interlock write
*(unsigned int *)0x00800004 = 0x11223344;
DFLASH.MCR.B.EHV = 1;
while(DFLASH.MCR.B.DONE == 0);
DFLASH.MCR.B.EHV = 0;
DFLASH.MCR.B.PGM = 0;

/* read */
data1 = *(unsigned int *)0x00800000;
data2 = *(unsigned int *)0x00800004;

Regards,

Lukas

Re: DFlash writing MPC560D40

liviuc — Tue, 11 Oct 2016 14:19:07 GMT

Hi Lukas,

Thank you for your help and interest into this problem.

This is the first solution that I tried after reading the datasheet.

Tried it again today just for confirming my problem was still there.

The specific behavior is as follows:

PGM =1

...

*(unsigned int *)0x00800000 = 0xAABBCCDD;

- interlock write not done -> only address latching

*(unsigned int *)0x00800004 = 0x11223344;

- this value gets written into latched address (0x00800000)

- address 0x00800004 is untouched

Watched the behavior using disassembly and the operations are executed as expected so I exclude the compiler making any optimizations.

Thank again for your reply.

Re: DFlash writing MPC560D40

lukaszadrapa — Thu, 13 Oct 2016 05:38:47 GMT

Could you send me the project to be able to reproduce the issue?

Thanks,

Lukas