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Sample Assembly Code to Erase and Reprogram the TMS320F240
PRELIMINARY
A-43
Assembly Source Listings and Program Examples
PRELIMINARY
depletion:
LACL ERS_COUNT ;Get erase fail count.
ADD #1 ;Increment fail count.
SACL ERS_COUNT ;Save new count.
SUB #10 ;CHECK for max of 10.
BCND ers_error,GT ;If ers_cout>10 then hard fail.
CALL FLWS ;Else, try to recover from
;depletion.
LACL ERROR ;Check for FLASH–WRITE error.
BCND ers_error,neq ;If couldn’t recover, then hard
;fail.
B ers_loop ;Else, Try erase again.
ers_error:
**************************************************************
** If here, then an unrecoverable error occurred during **
** erase. **
** In an actual application, the system takes some action **
** to indicate that service is required. **
**************************************************************
B ers_error ;Error while erasing.
ers_done:
**********************************************************
** If here, then flash is erased and ready to be **
** reprogrammed. **
** This is a good place in the example to set a **
** breakpoint so that erasure can be verified (i.e., **
** all flash bits should be 1). **
**********************************************************
**************************************************************
** At this point, an actual application fills a buffer with **
** the data to be programmed. To simulate this in the **
** example, three DARAM locations are initialized. **
**************************************************************
LAR AR1, #0380h ;Using last 128 words of B1 DARAM
;as buffer.
MAR *,AR1
SPLK #0AAAAh,*+ ;Use dummy data for buffer.
SPLK #05555h,*+
SPLK #0AAAAh,*