BASE0, BASE+0, BASE1, Error | Texas Instruments TMS320F20x/F24x DSP

PRELIMINARY

Assembly Source for Algorithms

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**	Variable declaration file	**
*		**
*	TMS320F2XX Flash Utilities.	**
*	Revision: 2.0, 9/10/97	**
*	Revision: 2.1, 1/31/98	**
*		**
*	Filename: svar20.asm	**
*		**
*Note:		**

*DLOOP is a delay loop variable used in flash algorithms. ** *This is a function of CLKOUT1. If the F206 device runs at ** *any CLKOUT1 speed other than 20 MHz, DLOOP value should be **

*redefined per the equation explained below. Use of	**
*current DLOOP for flash programming at speeds other than	**
*20 MHz is not recommended.	**

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.mmregs
BASE .set 0300h			;Base address for variables
			;can be changed to relocate
			;variable space in RAM.
BASE_0	.set	BASE+0	;Scratch pad registers.
BASE_1	.set	BASE+1	;
BASE_2	.set	BASE+2	;
BASE_3	.set	BASE+3	;
BASE_4	.set	BASE+4	;
BASE_5	.set	BASE+5	;
BASE_6	.set	BASE+6	;
SPAD1	.set	BASE+7	;
SPAD2	.set	BASE+8	;
FL_ADRS	.set	BASE+10	;Flash load address.
FL_DATA	.set	BASE+11	;Flash load data.
ERROR	.set	BASE+15	;Error flag register.
*Variables for ERASE and CLEAR
RPG_CNT	.set	BASE+12	;Program pulse count.
FL_ST	.set	BASE+13	;Flash start addr/Seg Cntrl Reg.
FL_END	.set	BASE+14	;Flash end address.
*

PRELIMINARY

Assembly Source Listings and Program Examples

A-3

Image 55

Texas Instruments TMS320F20x/F24x DSP BASE0, BASE+0, BASE1, BASE+1 BASE2, BASE+2 BASE3, BASE+3 BASE4, BASE+4 BASE5, Fldata

Contents

Literature Number SPRU282 September Important Notice Read This First Preliminary Related Documentation From Texas Instruments Preliminary If You Need Assistance Viii Contents Contents Figures Tables Introduction Basic Concepts of Flash Memory Technology ±1. TMS320 Devices With On-Chip Flash Eeprom TMS320F20x/F24x Flash Module ±1. TMS320F20x/F24x Program Space Memory Maps Benefits of Embedded Flash Memory in a DSP System Preliminary Topic Flash Operations and Control Registers Preliminary Flash Operations and Control Registers ±1. Flash Memory Logic Levels During Programming and Erasing Accessing the Flash Module 1 TMS320F206 Flash Access-Control Register ±2. Memory Maps in Register and Array Access Modes OUT 2 TMS320F24x Flash Access-Control Register Segment Control Register Segctr Flash Module Control Registers ±3. Segment Control Register Field Descriptions Write Address Register Wadrs Flash Test Register TST Write Data Register Wdata Read Modes Program Operation Erase Operation Recovering From Over-Erasure Flash-Write Operation Protecting the Array Reading From the Flash Array Algorithm Implementations Software Considerations How the Algorithms Fit Into the Program-Erase-Reprogram Flow ±1. Algorithms in the Overall Flow ±2. The Programming Algorithm in the Overall Flow Programming or Clear Algorithm Preliminary ±3. Programming or Clear Algorithm Flow Step Action Description Mask the data to program Preliminary ±4. Erase Algorithm in the Overall Flow Erase Algorithm ±2. Steps for Applying One Erase Pulse Preliminary ±5. Erase Algorithm Flow ±6. Flash-Write Algorithm in the Overall Flow Flash-Write Algorithm ±3. Steps for Applying One Flash-Write Pulse ±7. Flash-Write Algorithm Flow Preliminary Preliminary Assembly Source Listings Program Examples Header File for Constants and Variables, SVAR20.H Assembly Source for Algorithms BASE1 ErrorBASE0 BASE+0 Dloop ConstantsD5K D7K Protect Clear Algorithm, SCLR20.ASMSegst Segend AR1 Gclr PROTECT,SEGST,SEGEND DELAY,REGS,ARRAYSplk #0,ERROR AR0 Newrow Exit Splk #1,ERRORSacl Flst Lacl Fladrs Tblr Fldata Activate Write BIT Tblw SPAD1 Execute Command LARSET Delay Call DELAY,*,AR6 Wait Stop Write Operation Splk Shutdown Write Operation Tblw SPAD1 Execute Command LAR Bcnd PBDONE,EQ Tblw SPAD1 Execute Command LARPrgbyte Call SETRDVER0 Lacl BASE2 Erase Algorithm, SERA20.ASM Flash Write Command Word Erase Command WordErase Exebin Command Word Inverse Erase Command Word Xorerase Clrc OVMSacl Flend Call Setmode Nextivers Lacl BASE1 Splk #STOP,BASE0Inverase Splk #INVER,BASE0 Call Setmode Bldd Flash Stop command, and Ffff for Wdata Flash-Write Algorithm, SFLW20.ASM Flws MaxflwBldd #FLST,BASE1 Flwrite Splk Call Array Access Flash Array DoneCall DELAY,*,AR6 Bcnd Setmode Call Lacl Tblw LAR Call Call RET LAR AR0,#MAXFLW Cmpr Programming Algorithm, SPGM20.ASM Gpgmj PROTECT,DELAY,REGS,ARRAYAR3 AR4 SUB Sacl BASE4 Setc Intm Globally Mask ALL Interrupts Splk #0,ERRORGpgmj Splk Mask ALL Interrupts Adjrow NEG Rowdone Lacl FladrsBcnd DONE, GT Lacl Fladrs Newrow SETRDVER0 Call Regs Access Flash Registers Shut Down Write Operation Tblw SPAD1 Execute Command LAR Bcnd PBEND,EQ XOR FldataPbend RET Subroutines Used By All Four Algorithms, SUTILS20.ASM Lacc Flst SUB OUT SPAD2,FACCESS0SPAD2,FACCESS1 OUT SPAD2,F24XACCS Callable Interface to Flash Algorithms PARMS+2 GclrSEGST,SEGEND,PROTECT PARMS+1 Arprotect Lacl ErrorErsparams Arstack 1PROTECT Sacl ErscountCall Flws LAR AR1,SVAR1 Call Gpgmj Popd *+ Assembly Code for TMS320F206 Sample Assembly Code to Erase and Reprogram the TMS320F206 PARMS+1 SUB Memory DLY Psaram Block B2Sections Psaram Sample C Code to Erase and Reprogram the TMS320F206 Linker Command File for TMS320F206 Sample C Code Block B2 Dsaram FLASH0FLASH1 BLKB2 Assembly Code for TMS320F240 Sample Assembly Code to Erase and Reprogram the TMS320F240 CKCR1 RticrWdcr CKCR0 LDP #PARMS Splk LDP #DPPF1PORRST, PLLRST, Illrst SWRST, Wdrst Lacl Syssr Accl = Syssr Sacl Syssr Daram LDP #PARMS Extram Linker Command File for TMS320F240 Sample Assembly CodeB0PGM Extram 0 /******Delay Subroutine Rev1.003/98 JGC Linker Command File for TMS320F240 Sample C Code B0DAT Block B2 Dsram Compute Length Function for Disabling TMS320F240 Watchdog TimerLacl Wdcr Syscr Functions for Initializing the TMS320F240Sacl Wdcr Pshd Sacl Wdtcr Index Assembly code SERA2x.ASM Described 10 to Margin Role in single program pulse WRITE/ERASE field Described