Texas Instruments TMS320F20x/F24x DSP manual Preliminary

PRELIMINARY

Sample Assembly Code to Erase and Reprogram the TMS320F206

;data section used for	*
;temporary variables, and	*
;for passing parameters	*
;to the flash algorithms.	*

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

PROTECT .set PARMS ;Segment enable bits. *

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***Parameters needed for Programming algorithm. ***

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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.

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SEG_ST	.set	PARMS+4	;Segment	start address.	*
SEG_END	.set	PARMS+5	;Segment	end address.	*

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****Other misc variables.****

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ERS_COUNT .set PARMS+6 ;Used for erase fail count. *

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.text

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** 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.

PRELIMINARY Assembly Source Listings and Program Examples A-33