Texas Instruments TMS320F20x/F24x DSP manual Preliminary, Assembly Source for Algorithms, A-23

PRELIMINARY

Assembly Source for Algorithms

	SPLK #04000h,FL_ST ;FL_ST = FLASH1 CTRL REGS
FL0	RET

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* THIS SECTION PROGRAMS THE VALUE STORED IN FL_DATA INTO		*
*	THE FLASH ADDRESS DEFINED BY FL_ADRS.	*
*		*

* The following resources are used for temporary storage: *

*	AR6	Parameter passed to Delay	*
*	SPAD1	Flash program and STOP commands	*
*	SPAD2	Flash program + EXE command.	*

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EXE_PGM				;	*
*					*
	CALL	ARRAY		;ACCESS ARRAY	*
* LOAD WADRS AND WDATA					**
	LACL		FL_ADRS	;ACC => PROGRAM ADRS	*
	TBLW		FL_DATA	;LOAD WADRS AND WDATA	*
	CALL	REGS		;ACCESS FLASH REGS	*
* SET UP WRITE COMMAND WORDS					**
	LACL		PROTECT	;GET SEGMENT PROTECT MASK	**
	OR		#WR_CMND	;OR IN WRITE COMMAND	**
	SACL		SPAD1	;SPAD1 = WRITE COMMAND	**
	OR		#WR_EXE	;OR IN EXEBIN COMMAND	**
	SACL		SPAD2	;SPAD2 = WRITE EXE COMMAND	**
	LACL		FL_ST	;ACC => (FLASH)	*
*					*
*	ACTIVATE WRITE BIT				**
	TBLW		SPAD1	;EXECUTE COMMAND	**
	LAR		AR6,#D10	;SET DELAY	**
	CALL	DELAY,*,AR6		;WAIT	**
*	SET EXEBIN BIT				**
	TBLW		SPAD2	;EXECUTE COMMAND	**
	LAR		AR6,#D100	;SET DELAY	**
	CALL	DELAY,*,AR6		;WAIT	**
*	STOP WRITE OPERATION				*
	SPLK		#0,SPAD1	;SHUT DOWN WRITE OPERATION	*
	TBLW		SPAD1	;EXECUTE COMMAND	*
	TBLW		SPAD1	;EXECUTE COMMAND	*
	LAR		AR6,#D10	;SET DELAY	*
	CALL	DELAY,*,AR6		;WAIT	*
*					*
	RET	;RETURN TO CALLING SEQUENCE			*

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* ACTIVATE VER0 ON FLASH READS		*
*	LOADS FLASH WORD AT ADDR FL_ADRS TO FL_DATA.	*
*	Uses SPAD1 for temporary storage of flash commands.	*

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SET_RD_VER0	;	*
CALL REGS	;ACCESS FLASH REGISTERS	*

PRELIMINARY Assembly Source Listings and Program Examples A-23