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

Assembly Source for Algorithms

PRELIMINARY

*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 => 0 (FLASH0)	*
*	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		;SHUTDOWN WRITE OPERATION	*
	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 *
LACL	FL_ST	;ACC => FLASH	*
SPLK	#VER0,SPAD1	;ACTIVATE VER0	*
TBLW	SPAD1	;EXECUTE COMMAND*
LAR	AR6,#D10	;SET DELAY	*
CALL	DELAY,*,AR6	;WAIT	*
CALL	ARRAY	;ACCESS FLASH ARRAY	*
LACL	FL_ADRS	;POINT TO ADRS	*
TBLR	FL_DATA	;GET FLASH WORD 1x read	*
TBLR	FL_DATA	;2x read	*
TBLR	FL_DATA	;3x read	*
CALL	REGS	;ACCESS FLASH REGISTERS	*
LACL	FL_ST	;ACC => FLASH	*
SPLK	#STOP,SPAD1	;DEACTIVATE VER0	*

A-8 PRELIMINARY