Accessing Flash memory of C8051F120 chip

[ajfreak]

flash_read silicon labs

Hi der,
Can ne1 plz suggest me a proper code to access flash memory of C8051F120 in Keil C.m not sure how to conver d MOVX n MOVC instructions in C. Also m kinda uncertain abt d proper order of d sfr assignments...
:!:

 

[walygat]

i try this with F310 silicon Labs and it work well.


in variables declaration zone for example

xdata unsigned int toto[20];

in use toto[6]=0X55;

i hope this will help you.

 

[ajfreak]

HEY THANKX FOR TAT SOLN.
BUT COULD U PLZ TELL ME HOW EXACTLY U USED IT IN UR CODE ...
PLZ GO THRU D FOLLOWING ROUTINES N TELL ME WER M GOIN WRONG....


void Flash_erase()
{


//Disable interrupts

PSBANK = 0X11; //BANK 1
FLSCL = 0X01; ///ENABLE FLASH WRITE/ERASE
PSCTL = 0X02; //ERASE LOC PRIOR TO WRITING
PSCTL = 0X01; //ERASE LOC PRIOR TO WRITING
DPH = 0X80;
DPL = 0X00;
PSCTL = 0X00; //disable flash erase by clearing PSEE
// PSCTL = 0X00; //clear pswe to redirect movx to xram
FLSCL = 0X00; //disable flash write
//re-enable interrupts

}


void Flash_write(unsigned char *s)
{

xdata unsigned char inp_reg2[20];


while(*s != '\0')
{
ACC = *s;

IE = 0X00; //Disable interrupts
CCH0CN = 0x00;
PSBANK = 0X11; //BANK 1
FLSCL = 0X01; ///ENABLE FLASH WRITE/ERASE
PSCTL = 0X01; //ERASE LOC PRIOR TO WRITING
inp_reg2[6]= 0x0080;
// DPH = 0X80;
// DPL = 0X00;
FLSTAT = 0X01;
//inp_reg1=P1;

*inp_reg2=ACC;

// DPL++;

// DPL = ACC;
// XBYTE[0x1234] = 0x55;
PSCTL = 0X00; //disable flash erase by clearing PSEE
// PSCTL = 0X00; //clear pswe to redirect movx to xram
FLSCL = 0X00; //disable flash write
//re-enable interrupts

}

}



unsigned char *Flash_read()
{
unsigned char xdata inp_reg2;


//Disable interrupts
PSBANK = 0X11; //BANK 1
FLSCL = 0X00; ///ENABLE FLASH WRITE/ERASE
PSCTL = 0X01; //ERASE LOC PRIOR TO WRITING
DPH = 0X80;
DPL = 0X00;
FLSTAT = 0X00;
ACC=inp_reg2;

// ACC = DPL;
// XBYTE[0x1234] = 0x55;
// PSCTL = 0X01; //disable flash erase by clearing PSEE
PSCTL = 0X00; //clear pswe to redirect movx to xram
FLSCL = 0X00; //disable flash write

return ACC;
}


HOPEFULLY DIS WILL HELP IN TROUBLESHOOTING MA PROB....

 

[prasadsrkrec]

I am using this code for flash erase flash write and flash read..

i am storing succesfully in one value by using this instruction. but problem is
i want to store another value in another location of flash memory.. but i am confusing their addresses..

kindly help me..
Plss