📄 flash.lst
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*(FLASH_COMMON_XAAA) = 0x55; // continue unlock sequence
//*(FLASH_COMMON_X555) = 0x10; // write 0x10 command to complete erase command
*(flash_bulk_erase_address) = 0x30; // write 0x30 to sector address to erase
do // now use dat polling method to verify successful erase
{
poll = *(flash_bulk_erase_address); // read flash status from any address
// within the defined flash address space
error = poll & NVM_ERROR; // save timeout error bit at DQ5
poll = poll & NVM_DATA_POLL; // look at D7
if (poll == NVM_DATA_POLL) // compare DQ7
done = TRUE; // bulk erase OK,
// indicate successful exit criteria
else if (error == NVM_ERROR) // check for timeout error
err = TRUE; // indicate timeout error occurred
} while((done == FALSE) && (err == FALSE));
if (err == TRUE) // make sure timeout error and dat poll didn't
// occur simultaneously
{
poll = *(flash_bulk_erase_address); // Read flash status again
poll = poll & NVM_DATA_POLL; // get DQ7 of poll byte read from flash
if (poll == NVM_DATA_POLL) // compare DQ7
done = TRUE; // the flash erased OK at the same
// time timout error occured, indicate successful
// exit criteria
*(FLASH_COMMON_X555) = 0xF0; // reset the flash array (short reset instruction)
// now delay 3 msec per dat sheet
}
return(done); // a successful flash erase returns 1, timeout error returns 0
}
#endif
299
300
301 /*
302 *****************************************************************************************************
C51 COMPILER V7.06 FLASH 09/26/2008 13:35:54 PAGE 6
303 *
304 *****************************************************************************************************
305 */
306 #ifdef _F_B_E_B
307
308 unsigned char flash_boot_erase_sector(
309 volatile unsigned char xdata* flash_bulk_erase_address)
310 {
311 1 unsigned char done;
312 1 unsigned char poll;
313 1 unsigned char error;
314 1 unsigned char err;
315 1
316 1 done = FALSE;
317 1 err = FALSE;
318 1
319 1 // Note: the following constants (FLASH_COMMON_XXXX)
320 1 // are declared type volatile in the header file
321 1 // so they are not optimized away by the compiler
322 1
323 1 *(FLASH_BOOT_X555) = 0xAA; // unlock main flash, write 0xAA to addess 0xX555
324 1 *(FLASH_BOOT_XAAA) = 0x55; // unlock main flash, write 0x55 to addess 0xXAAA
325 1 *(FLASH_BOOT_X555) = 0x80; // write 0x80 command to erase entire chip
326 1 *(FLASH_BOOT_X555) = 0xAA; // continue unlock sequence
327 1 *(FLASH_BOOT_XAAA) = 0x55; // continue unlock sequence
328 1 // *(FLASH_BOOT_X555) = 0x10; // write 0x10 command to complete erase command
329 1 *(flash_bulk_erase_address) = 0x30; // write 0x30 to sector address to erase
330 1
331 1 do // now use dat polling method to verify successful erase
332 1 {
333 2 poll = *(flash_bulk_erase_address); // read flash status from any address
334 2 // within the defined flash address space
335 2
336 2 error = poll & NVM_ERROR; // save timeout error bit at DQ5
337 2
338 2 poll = poll & NVM_DATA_POLL; // look at D7
339 2
340 2 if (poll == NVM_DATA_POLL) // compare DQ7
341 2
342 2 done = TRUE; // bulk erase OK,
343 2 // indicate successful exit criteria
344 2
345 2 else if (error == NVM_ERROR) // check for timeout error
346 2 err = TRUE; // indicate timeout error occurred
347 2
348 2 } while((done == FALSE) && (err == FALSE));
349 1
350 1
351 1 if (err == TRUE) // make sure timeout error and dat poll didn't
352 1 // occur simultaneously
353 1 {
354 2 poll = *(flash_bulk_erase_address); // Read flash status again
355 2
356 2 poll = poll & NVM_DATA_POLL; // get DQ7 of poll byte read from flash
357 2
358 2 if (poll == NVM_DATA_POLL) // compare DQ7
359 2
360 2 done = TRUE; // the flash erased OK at the same
361 2 // time timout error occured, indicate successful
362 2 // exit criteria
363 2
364 2 *(FLASH_BOOT_X555) = 0xF0; // reset the flash array (short reset instruction)
C51 COMPILER V7.06 FLASH 09/26/2008 13:35:54 PAGE 7
365 2 // now delay 3 msec per dat sheet
366 2 }
367 1
368 1 return(done); // a successful flash erase returns 1, timeout error returns 0
369 1
370 1 }
371
372 #endif
373
374 /*
375 *****************************************************************************************************
376 *
377 *****************************************************************************************************
378 */
379 #ifdef _F_R
void flash_reset() // reset flash, read array mode
{
// Note: the following constants (FLASH_COMMON_XXXX)
// are declared type volatile in the header file
// so they are not optimized away by the compiler
*(FLASH_COMMON_X555) = 0xAA; // unlock main flash, write 0xAA to addess 0xX555
*(FLASH_COMMON_XAAA) = 0x55; // unlock main flash, write 0x55 to addess 0xXAAA
*(FLASH_COMMON_X555) = 0xF0; // write 0xF0 command to reset
// Flash memory to Read Array Mode
// now delay 3 msec per dat sheet
}
void flash_boot_reset() // reset boot flash, read array mode
{
// Note: the following constants (FLASH_BOOT_XXXX)
// are declared type volatile in the header file
// so they are not optimized away by the compiler
*(FLASH_BOOT_X555) = 0xAA; // unlock main flash, write 0xAA to addess 0xX555
*(FLASH_BOOT_XAAA) = 0x55; // unlock main flash, write 0x55 to addess 0xXAAA
*(FLASH_BOOT_X555) = 0xF0; // write 0xF0 command to reset
// Flash memory to Read Array Mode
// now delay 3 msec per dat sheet
}
#endif
412
413
414 /*
415 *****************************************************************************************************
416 *
417 *****************************************************************************************************
418 */
419 #ifdef _F_R_I
unsigned char flash_read_id(flash_id_address) // read flash identifier
volatile unsigned char *flash_id_address;
{
unsigned char id;
C51 COMPILER V7.06 FLASH 09/26/2008 13:35:54 PAGE 8
// Note: the following constants (FLASH_COMMON_XXXX)
// are declared type volatile in the header file
// so they are not optimized away by the compiler
*(FLASH_COMMON_X555) = 0xAA; // unlock main flash, write 0xAA to addess 0xX555
*(FLASH_COMMON_XAAA) = 0x55; // unlock main flash, write 0x55 to addess 0xXAAA
*(FLASH_COMMON_X555) = 0x90; // write 0x90 command to get ID
id = *(flash_id_address); // read flash status, address bit A6 = 0
// A1 = 0
// A0 = 1
*(FLASH_COMMON_X555) = 0xF0; // reset the flash array (short reset instruction)
// now delay 3 msec per dat sheet
return (id); // return byte ID value
}
#endif
445
446
447 /*
448 *****************************************************************************************************
449 *
450 *****************************************************************************************************
451 */
452 #ifdef _F_R_S_P
extern xdata PSD_REGS PSD_reg;// _at_ PSD_REG_ADDR; // Define PSD registers at address "csiop" space
unsigned char flash_read_sector_protect()
{
return (PSD_reg.MAINPROTECT); //This is a register inside the PSD
// For reference, see the header file
// upsd3200.h for the location of
// the PSD register, MAINPROTECT.
}
#endif
467
468
469
470
471 /*
472 *****************************************************************************************************
473 *FUNC:
474 *NOTE:
475 *****************************************************************************************************
476 */
477 unsigned char xdata bootdptr _at_ 0x7E00;
478
479 void ReadFlash(unsigned char xdata *dest,unsigned int length)
480 {
481 1 unsigned int i=0;
482 1 unsigned char xdata *read_add = bootdptr;
483 1
484 1 for (i=0; i<length; i++) {
485 2 *dest++ = *read_add++;
486 2 }
487 1 }
488
C51 COMPILER V7.06 FLASH 09/26/2008 13:35:54 PAGE 9
489 void WriteFlash(unsigned char xdata *source,unsigned int length)
490 {
491 1 unsigned int i=0;
492 1 unsigned char xdata *write_add = bootdptr;
493 1
494 1 flash_boot_erase_sector(write_add);
495 1 for (i=0; i<length; i++) {
496 2 flash_boot_write_with_poll(write_add++,*source++);
497 2 }
498 1 }
499
500
MODULE INFORMATION: STATIC OVERLAYABLE
CODE SIZE = 341 ----
CONSTANT SIZE = ---- ----
XDATA SIZE = ---- ----
PDATA SIZE = ---- ----
DATA SIZE = ---- 14
IDATA SIZE = ---- ----
BIT SIZE = ---- ----
END OF MODULE INFORMATION.
C51 COMPILATION COMPLETE. 0 WARNING(S), 0 ERROR(S)
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