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

PRELIMINARY

Assembly Source for Algorithms

SACL	FL_ST	;Save array start address.
LACL	FL_ADRS	;Get segment start address.
NEWROW	;********Begin a new row.*
SACL	BASE_1	;Save row start address.
LAR	AR1,#0	;Init pulse count to zero.
SAMEROW	;********Same row, next pulse.*
SPLK	#1,BASE_0	;Set row done flag = 1(True).
LACL	BASE_1	;Get row start address.
SACL	FL_ADRS	;Save as current address.
LAR	AR2,#31	;Init row index.

********Repeat the following code 32 times until end of row.*

LOBYTE		;********First, do low byte.*
	SPLK	#0FFh,BASE_2	;Get lo±byte mask.
	CALL	PRG_BYTE	;Check/Program lo±byte
	SPLK	#0FF00h,BASE_2 ;Get hi±byte mask.
	CALL	PRG_BYTE	;Check/Program hi±byte.
NEXTWORD		;********Next word in row.
	LACL	FL_ADRS	;Load address for next word.
	ADD	#1	;Increment address.
	SACL	FL_ADRS	;Save as current address.
	MAR	*,AR2	;Point to row index.
	BANZ	LOBYTE	;Do next word,and dec AR2.
********Reached end of row. Check if row done.*
	BIT	BASE_0,15	;Get row_done flag.
	BCND	ROW_DONE,TC	;If 1, then row is done.
	MAR	*,AR1	;Else, row is not done, so
	MAR	*+	;inc row pulse count.
	LAR	AR0,#MAX_PGM	;Check if passed allowable max.
	CMPR	2	;If AR1>MAX_PGM, then
	BCND	EXIT,TC	;fail, don't continue.
	B	SAMEROW	;else, go to beginning
			;of same row.
********If row done, then check if Array done.*
ROW_DONE			;Check if end of array.
	SUB	SEG_END	;Subtract segment end address.
	BCND	DONE,GEQ	;If >0, then done.
********Else, go to next row.*
	LACL	FL_ADRS	;Get current address.
	B	NEWROW	;Start new row.
********If here, then done.
DONE	CALL	ARRAY	;Access flash in array mode.
	RET
********If here, then unit failed to program.*
EXIT	SPLK	#1,ERROR	;Update error flag.
	B	DONE	;Get outa here.
.page

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

* 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.	*

PRELIMINARY Assembly Source Listings and Program Examples A-7