Confused in my Program

[chowjun]

 I want to use data flash in s12xs128 

void Dflash_Wt(uint paddr,unsigned dat){  while(FSTAT_CCIF == 0);       //Waiting Complete  FSTAT   = 0X30;               //Clear ACC PVI  FCCOBIX = 0;                  //step 0   FCCOBHI = 0X11;               //0X11  FCCOBLO = 0x10;               //D-FLASH block address  FCCOBIX = 1;                  //step 1  FCCOB   = paddr;              //Global Address Of Word To Be Program  FCCOBIX = 2;                  //step 2  FCCOB   = dat;                //Word 0 program value  FSTAT |=0X80;                 //lunch command  while(FSTAT_CCIF == 0);       //Waiting Complete}

paddr = 0;

dat    = 0x55;

after functoning this program  , the the word 0x55 can't be written , I look the address 0x100000 ,but it is empty.  I don't know which part of the code is wrong?

thanks!

[jsmcortina]

Is the flash erased?

Have you initialised FCLKDIV ?

What bitsize is "unsigned" ?

Have you checked the assembly output?

James

[nandu · Accepted solution]

Apart from the points mentioned by James, if you are using Codewarrior Compiler and the debugger is "True-Time Simulator & Real-Time Debugger", then right click on the "Memory" window and select the

"Adress  Space" option to 'Global'. In general this debugger sets this option as 'Logical'. So, this can be reason that you could not see any data at memory location, because debugger shows the logical address when the "Address Space" is selected as 'Logical'.

Hopes this helps

[chowjun]

Thanks for James and Nandu, I confiuse Logical with Global Space.

thanks

chowjun