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Does it is Possible to Erase & Write Sector 0 in LPC2214

Mustafa Shaikh

Hi,

I am implementing a functionality of IAP in LPC2214, for start up I have written a simple code in which
I am able to ease Sector 0 & other Sectors as Well, but when I try to write any data on sector 0 then it is not written it shows all 0xFF 0xFF .............
But in all the sectors data has been written succesfully only if I comment the sector 0 ERASE & WRITE function...

I have selected the ARM Mode in keil.

Can any one let me know what is the reason why I am not able to write on sector 0 ?
what are the parameters that has to be taken care while writing on sector 0 ?

#include "FlashOS.H"
#define M8(adr) (*((volatile unsigned char  *) (adr)))
void IAP_download(void);
volatile int  ret;
unsigned char TempBuf[1024] = " CMS CMS CMS ";
static unsigned char TempBuf2[1024];
unsigned int Cnt;

void IAP_download (void )
 {
  unsigned long n;
  unsigned short Cnt;
  ret = Init(0, 48000000, 1);
  // Erase Sector 0
  ret |= EraseSector(0x00000000);

  for (Cnt = 0; Cnt < 1024; Cnt++)
  {
    TempBuf2[Cnt] = '*';
  }

ret |=ProgramPage(0x00000000,1024,(unsigned char*)
                                        TempBuf2 );

/* main Function */




int main(void)
{
 IODIR0 = 0xFFFFFFFF;
 IODIR1 = 0xFFFFFFFF;
 // #pragma ARM
 VICIntEnClr = 0xFFFFFFFF;
 IAP_download( );
 // #pragma thumb
 while (1);
}


/* FalshPrg.c*/
#define STACK_SIZE     64      // Stack Size

#define SET_VALID_CODE 1       // Set Valid User Code Signature

unsigned long CCLK;            // CCLK in kHz

struct sIAP {                  // IAP Structure
  unsigned long cmd;           // Command
  unsigned long par[4];        // Parameters
  unsigned long stat;          // Status
} IAP;

void IAP_Execute (struct sIAP *pIAP);

unsigned long GetSecNum (unsigned long adr) {
  unsigned long n;

  n = (adr >> 13) & 0x1F;
  if (n >= 24) {
    n -= 14;
  }
  else if (n >= 8) {
    n  = 8 + (n >> 4);
  }

  return (n);
}

int Init (unsigned long adr, unsigned long clk, unsigned long fnc) {
unsigned int Cntr;

  CCLK  =  (1049*(clk >> 10)) >>10;

  MEMMAP  = 0x01;

  for(Cntr=0; Cntr<50000; Cntr++);
  for(Cntr=0; Cntr<50000; Cntr++);
  return (0);
}

int UnInit (unsigned long fnc) {
  return (0);
}


int EraseChip (void) {

  IAP.cmd    = 50;
  IAP.par[0] = 0;
  IAP.par[1] = 16;
  IAP_Execute (&IAP);
  if (IAP.stat) return (1);

  IAP.cmd    = 52;
  IAP.par[0] = 0;
  IAP.par[1] = 16;
  IAP.par[2] = CCLK;
  IAP_Execute (&IAP);
  if (IAP.stat) return (1);

  return (0);
}

int EraseSector (unsigned long adr) {
   unsigned long n;
   unsigned int Cntr;

   n = GetSecNum(adr);

  IAP.cmd    = 50;
  IAP.par[0] = n;
  IAP.par[1] = n;
  IAP_Execute (&IAP);
  if (IAP.stat) return (1);

  for(Cntr=0; Cntr<50000; Cntr++);
  for(Cntr=0; Cntr<50000; Cntr++);
  IAP.cmd    = 52;
  IAP.par[0] = n;
  IAP.par[1] = n;
  IAP.par[2] = CCLK;
  IAP_Execute (&IAP);
  if (IAP.stat) return (1);

  for(Cntr=0; Cntr<50000; Cntr++);
  for(Cntr=0; Cntr<50000; Cntr++);

  return (0);

}


int ProgramPage (unsigned long adr, unsigned long sz, unsigned char *buf) {
  unsigned long n;
  unsigned int Cntr;

#if SET_VALID_CODE != 0
  if (adr == 0) {
    n = *((unsigned long *)(buf + 0x00)) +
        *((unsigned long *)(buf + 0x04)) +
        *((unsigned long *)(buf + 0x08)) +
        *((unsigned long *)(buf + 0x0C)) +
        *((unsigned long *)(buf + 0x10)) +
        *((unsigned long *)(buf + 0x18)) +
        *((unsigned long *)(buf + 0x1C));
        *((unsigned long *)(buf + 0x14)) = 0 - n;
  }
#endif

  n = GetSecNum(adr);

  IAP.cmd    = 50;
  IAP.par[0] = n;
  IAP.par[1] = n;
  IAP_Execute (&IAP);
  if (IAP.stat) return (1);

  for(Cntr=0; Cntr<50000; Cntr++);
  for(Cntr=0; Cntr<50000; Cntr++);

  IAP.cmd    = 51;
  IAP.par[0] = adr;
  IAP.par[1] = (unsigned long)buf;
  IAP.par[2] = 1024;
  IAP.par[3] = CCLK;
  IAP_Execute (&IAP);
  if (IAP.stat) return (1);

  for(Cntr=0; Cntr<50000; Cntr++);
  for(Cntr=0; Cntr<50000; Cntr++);
  return (0);
}

Parents
  • 0 in reply to Mustafa Shaikh

    Hi Mustafa,

    You told us that, you can erase sector 0, but can not write to sector 0. Then, you should check the Return Code of IAP Copy RAM to flash command.

    It means, what is the value of your IAP.stat after you execute the IAP Copy RAM to flash command?

    int ProgramPage (unsigned long adr, unsigned long sz, unsigned char *buf) {
  unsigned long n;
  unsigned int Cntr;

#if SET_VALID_CODE != 0
  if (adr == 0) {
    n = *((unsigned long *)(buf + 0x00)) +
        *((unsigned long *)(buf + 0x04)) +
        *((unsigned long *)(buf + 0x08)) +
        *((unsigned long *)(buf + 0x0C)) +
        *((unsigned long *)(buf + 0x10)) +
        *((unsigned long *)(buf + 0x18)) +
        *((unsigned long *)(buf + 0x1C));
        *((unsigned long *)(buf + 0x14)) = 0 - n;
  }
#endif

  n = GetSecNum(adr);

  IAP.cmd    = 50;
  IAP.par[0] = n;
  IAP.par[1] = n;
  IAP_Execute (&IAP);
  if (IAP.stat) return (1);

/* IAP.stat provides all the information about why you can not write to sector 0. */


  for(Cntr=0; Cntr<50000; Cntr++);
  for(Cntr=0; Cntr<50000; Cntr++);

  IAP.cmd    = 51;
  IAP.par[0] = adr;
  IAP.par[1] = (unsigned long)buf;
  IAP.par[2] = 1024;
  IAP.par[3] = CCLK;
  IAP_Execute (&IAP);
  if (IAP.stat) return (1);

  for(Cntr=0; Cntr<50000; Cntr++);
  for(Cntr=0; Cntr<50000; Cntr++);
  return (0);
}

Reply
  • 0 in reply to Mustafa Shaikh

    Hi Mustafa,

    You told us that, you can erase sector 0, but can not write to sector 0. Then, you should check the Return Code of IAP Copy RAM to flash command.

    It means, what is the value of your IAP.stat after you execute the IAP Copy RAM to flash command?

    int ProgramPage (unsigned long adr, unsigned long sz, unsigned char *buf) {
  unsigned long n;
  unsigned int Cntr;

#if SET_VALID_CODE != 0
  if (adr == 0) {
    n = *((unsigned long *)(buf + 0x00)) +
        *((unsigned long *)(buf + 0x04)) +
        *((unsigned long *)(buf + 0x08)) +
        *((unsigned long *)(buf + 0x0C)) +
        *((unsigned long *)(buf + 0x10)) +
        *((unsigned long *)(buf + 0x18)) +
        *((unsigned long *)(buf + 0x1C));
        *((unsigned long *)(buf + 0x14)) = 0 - n;
  }
#endif

  n = GetSecNum(adr);

  IAP.cmd    = 50;
  IAP.par[0] = n;
  IAP.par[1] = n;
  IAP_Execute (&IAP);
  if (IAP.stat) return (1);

/* IAP.stat provides all the information about why you can not write to sector 0. */


  for(Cntr=0; Cntr<50000; Cntr++);
  for(Cntr=0; Cntr<50000; Cntr++);

  IAP.cmd    = 51;
  IAP.par[0] = adr;
  IAP.par[1] = (unsigned long)buf;
  IAP.par[2] = 1024;
  IAP.par[3] = CCLK;
  IAP_Execute (&IAP);
  if (IAP.stat) return (1);

  for(Cntr=0; Cntr<50000; Cntr++);
  for(Cntr=0; Cntr<50000; Cntr++);
  return (0);
}

Children
  • 0 in reply to John Linq

    Sorry, let me try again.

    int ProgramPage (unsigned long adr, unsigned long sz, unsigned char *buf) {
  unsigned long n;
  unsigned int Cntr;

#if SET_VALID_CODE != 0
  if (adr == 0) {
    n = *((unsigned long *)(buf + 0x00)) +
        *((unsigned long *)(buf + 0x04)) +
        *((unsigned long *)(buf + 0x08)) +
        *((unsigned long *)(buf + 0x0C)) +
        *((unsigned long *)(buf + 0x10)) +
        *((unsigned long *)(buf + 0x18)) +
        *((unsigned long *)(buf + 0x1C));
        *((unsigned long *)(buf + 0x14)) = 0 - n;
  }
#endif

  n = GetSecNum(adr);

  IAP.cmd    = 50;
  IAP.par[0] = n;
  IAP.par[1] = n;
  IAP_Execute (&IAP);
  if (IAP.stat) return (1);

/* IAP.stat provides all the information about why you can not write to sector 0. */


  for(Cntr=0; Cntr<50000; Cntr++);
  for(Cntr=0; Cntr<50000; Cntr++);

  IAP.cmd    = 51;
  IAP.par[0] = adr;
  IAP.par[1] = (unsigned long)buf;
  IAP.par[2] = 1024;
  IAP.par[3] = CCLK;
  IAP_Execute (&IAP);
  if (IAP.stat) return (1);

/* IAP.stat provides all the information about why you can not write to sector 0. */


  for(Cntr=0; Cntr<50000; Cntr++);
  for(Cntr=0; Cntr<50000; Cntr++);
  return (0);
}

  • 0 in reply to John Linq

    I have tired to erase sector 0, but It does not return from the IAP_Execute (&IAP); function i.e the code in the RED ?

    int EraseSector (unsigned long adr) {
  unsigned long n;
  unsigned long int Cntr;

  n = GetSecNum(adr);

  IAP.cmd    = 50;
  IAP.par[0] = n;
  IAP.par[1] = n;
  IAP_Execute (&IAP);

    // call LED Blink function
    LEDBlink(ON);
   // Add Delay
  for(Cntr=0; Cntr<5000000; Cntr++);
  for(Cntr=0; Cntr<5000000; Cntr++);
    LEDBlink(OFF);
  for(Cntr=0; Cntr<5000000; Cntr++);
  for(Cntr=0; Cntr<5000000; Cntr++);

  if (IAP.stat)
    {
     // call LED Blink function
     LEDBlink(ON);
     // Add Delay
    for(Cntr=0; Cntr<5000000; Cntr++);
    for(Cntr=0; Cntr<5000000; Cntr++);
     LEDBlink(OFF);
    for(Cntr=0; Cntr<5000000; Cntr++);
    for(Cntr=0; Cntr<5000000; Cntr++);
     return (1);
     }

  IAP.cmd    = 52;
  IAP.par[0] = n;
  IAP.par[1] = n;
  IAP.par[2] = CCLK;

     LEDBlink(ON);
  for(Cntr=0; Cntr<5000000; Cntr++);
  for(Cntr=0; Cntr<5000000; Cntr++);
     LEDBlink(OFF);
  for(Cntr=0; Cntr<5000000; Cntr++);
  for(Cntr=0; Cntr<5000000; Cntr++);

  IAP_Execute (&IAP);
  
  /* It does not execute below function if we try to erase sector 0 */
  
  
    LEDBlink(ON);
  for(Cntr=0; Cntr<5000000; Cntr++);
  for(Cntr=0; Cntr<5000000; Cntr++);
    LEDBlink(OFF);
  for(Cntr=0; Cntr<5000000; Cntr++);
  for(Cntr=0; Cntr<5000000; Cntr++);
  

  if (IAP.stat)
   {
    // call LED Blink function
     LEDBlink(ON);
     // Add Delay
    for(Cntr=0; Cntr<5000000; Cntr++);
    for(Cntr=0; Cntr<5000000; Cntr++);
     LEDBlink(OFF);
    for(Cntr=0; Cntr<5000000; Cntr++);
    for(Cntr=0; Cntr<5000000; Cntr++);
     return (1);
   }

  return (0);
}

  • 0 in reply to Mustafa Shaikh

    question remains: have you followed my advise? even if it does not immediately fix the problem, at least you'll have that out of th way. you really need to UNDERSTAND what you are doing - changing here and there is not going to bring you anywhere.

  • 0 in reply to Tamir Michael

    Hi Mustafa,

    => I have tired to erase sector 0, but It does not return from the IAP_Execute (&IAP); <=

    Do you mean that, actually, you have never erased sector 0 successfully?

    It does not return, then, do you know where is it? What is the value of your Program Counter?

  • 0 in reply to Tamir Michael

    Thanks Tamir & John .........

    I am very happy by the advice suggested by you .......
    really .... Just changing the code here and there had not help me .... I have gone through the whole code with conceptually and through understanding .......

    Finally I was able to write the full IAP routine successfully ..... .i.e able to erase all the sectors & programmed it......

    I am making mistake in placing the code in ROM region, after your advice place the code in IRAM region that write the flash in RAM, right click on your C file, use options to select a RAM region -