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Assembly Source for Algorithms
PRELIMINARY
A-22
PRELIMINARY
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
LACL FL_ADRS ;Check if end of array.
SUB BASE_4 ;Subtract end addr.
BCND DONE, GT ;If >0 then done.
** Else, go to next row. *
LACL FL_ADRS
B NEWROW ;Start new row.
** If here, then done.
DONE
CALL ARRAY ;Access flash in array mode.
RET ;Return to calling program.
** If here, then unit failed to program. *
EXIT SPLK #1,ERROR ;Update error flag (error).
B DONE ;Get outa here.
************************************************
.page
************************************************
* ADJ_ROW: This routine is used to adjust the *
* row length, if the start or end address of *
* code being programmed does not fall on a row *
* boundary. The row length is passed in the *
* BASE_2 variable, and the adjustment value to *
* be subtracted is passed in the accumulator. *
***********************************************
ADJ_ROW
NEG ;Take twos complement.
ADD BASE_2 ;Add row length.
SACL BASE_2 ;Save new row length.
RET
*************************************************
* SET_MODULE: This routine is used to point to *
* the appropriate flash array control register *
* This is only important for ’F2XX devices with *
* multiple flash modules like the 320F206. The *
* variable FL_ST is returned with the correct *
* register address. *
* The following resources are used *
* temporarily: *
* AR0 Used for comparisons *
* AR4 Used for flash address *
***************************************************
SET_MODULE
LAR AR4,FL_ADRS ;AR4 = current address.
SPLK #0,FL_ST ;FL_ST = FLASH0 CTRL REGS
LAR AR0,#4000H ;AR0 = compare value.
CMPR 1 ;If AR4 < AR0 then
;FL_ADRS < 4000H; SET TC
BCND FL0,TC ;Address is in FL0.
* ;Else address is in FL1.