Texas Instruments TMS320F20x/F24x DSP manual Preliminary, A-34

Sample Assembly Code to Erase and Reprogram the TMS320F206

PRELIMINARY

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 has 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 SARAM locations are initialized. **

**********************************************************

LAR AR1, #0c00h ;Using last 3K of SARAM as

;buffer.

MAR *,AR1

SPLK #0AAAAh,*+ ;Use dummy data for buffer. SPLK #05555h,*+

SPLK #0AAAAh,*

**********************************************************

** Now that the data to be programmed is		ready, the	**
** programming algorithm is invoked. Note that four			**
**	parameters must be initialized before	calling the	**
**	algorithm.		**

**********************************************************

LDP	#PARMS
**********Put parameters where they belong.**********
splk	#0ff00h,PROTECT
splk	#0c00h,PRG_bufaddr
splk	#04000h,PRG_paddr
splk	#3,PRG_length
***********Next program flash ************
CALL	GPGMJ	;Program flash from buffer.
LACL	ERROR	;Check for program error.
BCND	prg_error,neq	;If error then clear ACC.
B	prg_done	;Else, No errors programming.

A-34 PRELIMINARY