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Sample Assembly Code to Erase and Reprogram the TMS320F206
PRELIMINARY
A-33
Assembly Source Listings and Program Examples
PRELIMINARY
;data section used for *
;temporary variables, and *
;for passing parameters *
;to the flash algorithms. *
*********************************************************
PROTECT .set PARMS ;Segment enable bits. *
**********************************************************
***Parameters needed for Programming algorithm. ***
**********************************************************
PRG_bufaddr .set PARMS+1 ;Address of buffer for *
;program data. *
PRG_paddr .set PARMS+2 ;First flash address to *
;program. *
PRG_length .set PARMS+3 ;Length of block to program.*
**********************************************************
* Parameters needed for CLEAR, ERASE, and FLW algorithms.
*
**********************************************************
SEG_ST .set PARMS+4 ;Segment start address. *
SEG_END .set PARMS+5 ;Segment end address. *
**********************************************************
**** Other misc variables. ****
**********************************************************
ERS_COUNT .set PARMS+6 ;Used for erase fail count. *
**********************************************************
.text
*********************************************************
** First, erase flash1 by invoking the clear and erase *
** algorithms. *
** Note: three parameters must be initialized before *
** calling the algorithms. *
*********************************************************
LDP #PARMS
SPLK #0,ERS_COUNT ;Set erase fail count to 0.
**********Put parameters where they belong.**********
SPLK #0ff00h,PROTECT
SPLK #04000h,SEG_ST
SPLK #07FFFh,SEG_END
***********First clear flash ************
ers_loop:
CALL GCLR ;Clear flash.
LACL ERROR ;Check for CLEAR error
BCND ers_error,neq ;If error, then hard fail.
***********Next erase flash ************
CALL GERS ;Erase flash.
LACL ERROR ;Check for CLEAR error
BCND depletion,neq ;If error, then try
;flash–write.
B ers_done ;Else, no errors erasing.
depletion:
LACL ERS_COUNT ;Get erase fail count.
ADD #1 ;Increment fail count.
SACL ERS_COUNT ;Save new count.