PRELIMINARY
;**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 | |
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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. | * |
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PARMS: .usect ºPRG_parmº,10 ;This is an uninitialized data | * |
;section used for temporary | * |
;variables and for passing | * |
;parameters to the flash | * |
;algorithms. | * |
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PROTECT .set PARMS ;Segment enable bits.*
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*****Parameters needed for Programming algorithm. ********
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PRG_bufaddr | .set | PARMS+1 | ;Addr of buffer for pgm data | * |
PRG_paddr | .set | PARMS+2 | ;First flash addr to program | * |
PRG_length | .set | PARMS+3 | ;Length of block to program | * |
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**Parameters needed for CLEAR, ERASE, and FLW algorithms. *
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SEG_ST | .set | PARMS+4 | ;Segment | start address. | * |
SEG_END | .set | PARMS+5 | ;Segment | end address. | * |
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****Other misc variables.****
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ERS_COUNT .set | PARMS+6 | ;Used | for erase fail count. | * | |
SV_AR1 | .set | PARMS+7 | ;Used | to save AR1. | * |
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.sect ºPRG_textº
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* | function erase(PROTECT,SEG_ST,SEG_END) | * |
* Status is returned in the accumulator. | * | |
* | 0 = Fail,1 = Pass | * |
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* | This function performs the clear and erase operation | * |
* | on the 'F2XX flash. If the erase operation fails, the * | |
* | flash±write operation is used to try to recover from | * |
* | depletion. If the array recovers, the entire process | * |
* | (clr+ers+flw) is repeated a maximum of 10 times. The | * |
* | return value indicates the status. If this function | * |
PRELIMINARY |
