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Assembly Source for Algorithms
PRELIMINARY
A-19
Assembly Source Listings and Program Examples
PRELIMINARY
A.1.5 Programming Algorithm, SPGM20.ASM
This code is an implementation of the program algorithm described in section
3.2 on page 3-4.
Memory section: fl_prg
Entry point: GPGMJ
Parameters to be declared and initialized by the calling code are:
- PRG_bufaddr defines the destination start address.
- PRG_length defines the source buffer length.
- PRG_paddr defines the source buffer start address (data space).
- PROTECT defines the values of bits 8–15 of SEG_CTR during the pro-
gramming algorithm.
Return value: ERROR (@BASE+15); 0 = Pass, 1 = Fail
**************************************************************
** PROGRAM Subroutine **
* **
* TMS320F2XX Flash Utilities. **
* Revision: 2.0, 9/10/97 **
* Revision: 2.0b, 12/5/97 **
* Revision: 2.1, 1/31/98 **
* **
* Filename: spgm20.asm **
* **
* Called by: c2xx_bpx.asm or flash application programs. **
* **
* !!CAUTION – INITIALIZE DP BEFORE CALLING THIS ROUTINE!! **
* **
* Function: This routine programs all or part of the **
* flash as specified by the variables: **
* PRG_paddr Destination start address *
* PRG_length Source buffer length *
* PRG_bufaddr Source buffer start address *
* *
* The algorithm used is ”row–horizontal”, which means that *
* an entire flash row (32 words) is programmed in parallel.*
* This method provides better uniformity of programming *
* levels between adjacent bits than if each address were *
* programmed independently. The algorithm also uses a *
* 3–read check for VER0 margin (i.e., the flash location is*
* read three times and the first two values are discarded.)*
* This provides low–freq read–back margin on programmed *