S12 / MagniV MicrocontrollersのトピックRe: Working on D-flash in s12x

Working on D-flash in s12x

rajad — Fri, 19 Dec 2008 15:06:33 GMT

I want to read and write NVM data to d-flash in s12x board.I have doubt on global addressing.

Sample code:
The global addresses are required. i.e. 0x10_0C00 must be used in this case

    FCCOBIX =  0x00;
    FCCOBHI =  0x12;    /* Erase D-Flash sector command */
->  FCCOBLO =  0x10;    /* Global address = 10 */

Memory mapping registers gpage is need to set any value or above code is enough.any one having sample project dealing with d-flash.Can u pls share it? this is urgent pls

Thanks in advance

Re: Working on D-flash in s12x

nandu — Sat, 20 Dec 2008 20:16:57 GMT

Hi Rajad,

I feel you don't need to set/configure any value specially to G-page.

Yes, you are right. we must use Global address scheme in the D-flash command registers..

The sample code that was given by you is OK (Thinking that you must have already configured your flack clock register (FCLKDIV) before doing any kind of flash operations)

But to erase a D-Flash sector successfully, you should mention the logical sector addres also..(may be you know this ..) like..

FCCOBIX   = 0x00;       /* index 0 */
FCCOBHI   = 0x12;       /* D-Flash Erase command */
FCCOBLO = 0x10;       /* Global address value i.e. G-Page value */
FCCOBIX   = 0x01;       /* index 1 */
FCCOB      = 0x0100;   /* sector address of a D-Flash */

please check the attached file, it may help you..

Re: Working on D-flash in s12x

rajad — Sun, 15 Feb 2009 11:50:36 GMT

Hi nandu,

Thnks for help regarding previous quiry response.working on d-flash in s12xf
I have few queries

1.On MCU protection :if it is in protection mode,we can't execute some commands.If it in single chip mode,then it allows some commands.For working d-flash,is need to consider abt this protection.Pls help regarding this.

2.which memory system(small,banked,large) we need to select for working on global memory address

regards,

Raja