Email: Password: Remember Me | Create Account (Free)

Back to Subject List

Old thread has been locked -- no new posts accepted in this thread
???
11/05/08 08:12
Read: times


 		 #159707 - reading flash problem
Responding to: ???'s previous message
Hello,


when you set the SFR bit (whatever the bit is in your processor) the flash becomes xdata. thus to write flash from xdata you must read the xdata storing the result in RAM (NOT xram) with the bit off, switch the bit on and then move the local value to flash.


That's for writing value to flash ? not for reading ?
My problem is for the part of code for reading value from flash.

Part of code for reading :

Save This Code
PART C -- read test string to FLASH memory at address 0x1000 and copy in tab eedata

   EA_save = EA;
   EA = 0;
   pwrite = 0x1000;
   FLSCL |= 0x40;
   PSCTL = 0x00;

   while (*pread !='') {

     *eedata = *pread;                // copy byte

      pread++;                         // advance pointers
	  pwrite++;
   }

   PSCTL = 0x00;                       // MOVX writes target XRAM
   
   FLSCL &= ~0x40;                     // disable FLASH writes/erases from
                                       // user software   

   EA = EA_save;                       // re-enable interrupts

 


Thanks

Regards

List of 31 messages in thread
TopicAuthorDate
flash memeory reading            01/01/70 00:00      
   How do you know            01/01/70 00:00      
      flash memory reading            01/01/70 00:00      
   Cross-posted on Keil            01/01/70 00:00      
   pread and pwrite...            01/01/70 00:00      
      my problem            01/01/70 00:00      
         No, you ignored my notes in my previous post            01/01/70 00:00      
            answers            01/01/70 00:00      
               Still no answers            01/01/70 00:00      
   first            01/01/70 00:00      
      a quick glance seems to revceal ...            01/01/70 00:00      
         /            01/01/70 00:00      
         MOVX During FLASH Write            01/01/70 00:00      
   and now he crossed it on the SILabs forum            01/01/70 00:00      
   my problem            01/01/70 00:00      
      RTFM            01/01/70 00:00      
         not xdata            01/01/70 00:00      
            reding flash            01/01/70 00:00      
               So fix the loop then            01/01/70 00:00      
            Not ok            01/01/70 00:00      
         reading flash problem            01/01/70 00:00      
            Yet one more post with broken read loop            01/01/70 00:00      
               correcting my code            01/01/70 00:00      
                  Then specify exactly what you don't understand            01/01/70 00:00      
                     i correct my code            01/01/70 00:00      
                        it's working            01/01/70 00:00      
                           Report feedback            01/01/70 00:00      
                              write cycle time            01/01/70 00:00      
                                 New Question, New Thread.            01/01/70 00:00      
                           So what fixed it?            01/01/70 00:00      
   correct registers ?            01/01/70 00:00      

Back to Subject List