Texas Instruments TMS320F20x/F24x DSP Preliminary, Assembly Source Listings and Program Examples

PRELIMINARY

Sample Assembly Code to Erase and Reprogram the TMS320F240

;**Variables included from flash algorithms.

.include ºsvar20.hº		;Variable declarations
.ref	GCLR	;References clear algo.
.ref	GPGMJ	;References program algo.
.ref	GERS	;References erase algo.
.ref	FLWS	;References flash±write algo.
;**Parameters used by flash algorithms.
.def	PRG_bufaddr, PRG_paddr
.def	PRG_length, PARMS

.def SEG_ST,SEG_END,PROTECT ;**F240 Register definitions

RTICR	.set	07027h	;RTI Control Register
WDCR	.set	07029h	;WD Control Register
CKCR0	.set	0702Bh	;Clock Control Register 0
CKCR1	.set	0702Dh	;Clock Control Register 1
SYSSR	.set	0701Ah	;System Module Status Register
DP_PF1	.set	224	;page 1 of peripheral file
			;(7000h/80h)

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

VARS: .usect ºPRG_dataº,16 ;This is an uninitialized data	*
;section required by the standard *
;flash algos for temporary	*
;variables. Pointers to this	*
;space are hardcoded in SVAR20.H, *
;and variables are init'd at	*
;run time.	*

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

PARMS: .usect ºPRG_parmº,10 ;This is an uninitialized data	*
;section that is used for	*
;temporary variables and for	*
;passing parameters to the flash	*
;algorithms.	*

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

PROTECT .set PARMS ;Segment enable bits.*

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

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

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

PRG_bufaddr	.set	PARMS+1	;Addr of buffer for pgm data. *
PRG_paddr	.set	PARMS+2	;1st flash addr to program.	*
PRG_length	.set	PARMS+3	;Length of block to program.	*

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

***Parameters needed for CLEAR, ERASE, and FLW algorithms. **

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

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

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

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

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

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

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

.text

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

**	First, initialize the key F240 registers for use with	*
**	the EVM.	*

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PRELIMINARY Assembly Source Listings and Program Examples A-41