topic Re: Bootloader for MC9S12xDP512 to erase and program at a certain area in S12 / MagniV Microcontrollers

Bootloader for MC9S12xDP512 to erase and program at a certain area

serkanakbulut — Wed, 13 Nov 2013 09:39:08 GMT

Hello Everyone,

We are using MC9S12xDP512 controller for our project. Currently we are using Softec and P&E tools to flash our .s19 files.

we were using attached code to erase all are and program all area.(I found the code in community discussion)

But now we need to erase and program at a certain area.

I wrote an example function to do it. I am erasing the area but cant programing :S.

So i think ı am missing somewhere.İf you see please let me now.

Thank You.

Here is the code.; Consider that function is in the attached project ,boot.c.

http://speedy.sh/dZ6n4/S12XBootLoader.zip

uchar MyData= { 0x11,0x22,0x33,0x44,0x55,0x66,0x77, 0x11,0x22,0x33,0x44,0x55,0x66,0x77, 0x11,0x22,0x33,0x44,0x55,0x66,0x77, 0x11,0x22,0x33,0x44,0x55,0x66,0x77, 0x11,0x22,0x33,0x44,0x55,0x66,0x77, 0x11,0x22,0x33,0x44,0x55,0x66,0x77, }; int ProgramCertainArea (void) {  ulong  GlobalAddress=0x7EC000;    uchar *PPAGEWinAddr; if(EraseFlashCmd(GlobalAddress, SectorEraseCmd)==1)  OutStr("E"); else  OutStr("S");  PPAGEVal = (GlobalAddress - 0x400000) / FPageWsize;  PPAGEWinAddr = (uchar *)(((GlobalAddress - 0x400000) % FPageWsize) + FPageWstart); if(ProgFlashBlock(PPAGEVal, (uint *)PPAGEWinAddr, (uint *)&MyData, 21)==1)  OutStr("E"); else  OutStr("S"); }

Re: Bootloader for MC9S12xDP512 to erase and program at a certain area

serkanakbulut — Thu, 14 Nov 2013 06:59:46 GMT

Is ıt about unsecuring the MCU in Special Single Chip Mode?

Or I should look Flash Protection and Flash Security topics.

Re: Re: Bootloader for MC9S12xDP512 to erase and program at a certain area

iggi — Mon, 25 Nov 2013 16:15:01 GMT

Hello,

I'm not sure why you cannot program the MCU after erasing it, but i doubt it's because it is secured.

Anyway, regarding the Flash security feature and how to unsecure an MCU, see this document:
https://community.freescale.com/docs/DOC-93803

Attached is a CodeWarrior example project written for MC9S12XDP512 device demonstrating Flash R/W routines.

Regards,

Ivan