; 30-DEC-2000 Eric Smith ; changed for GPASM assembler ;6-JAN-2000 Richard Ottosen ;This routine is for the SX parts in Turbo mode only. It does not matter if the ; Carry fuse is set or clear. ; ;Macro to delay for M number of cycles from 0 through 65535. ; The macro includes paging for long calls. ; ;Uses the routine "DelW" to do the short delays and uses the variable "DelMCnt" ; as well for long delays. ;The constants 5 and 15 must be loaded into variables "Five" and "Fifteen" ; before DelM is used. ; ; DelM MACRO _MM IF LOW(_MM) ==0 ;No delay at all ENDIF IF LOW(_MM) ==1 NOP ;Delay 1 cycle inline ENDIF IF LOW(_MM) ==2 NOP ;Delay 2 cycles inline NOP ENDIF IF LOW(_MM) ==3 GOTO $+1 ;Delay 3 cycles inline ENDIF IF LOW(_MM) ==4 GOTO $+1 ;Delay 4 cycles inline NOP ENDIF IF LOW(_MM) ==5 GOTO $+1 ;Delay 5 cycles inline NOP NOP ENDIF IF LOW(_MM) ==6 GOTO $+1 ;Delay 6 cycles inline GOTO $+1 ENDIF IF LOW(_MM) ==7 ERRORLEVEL -306 PAGE Delay6 CALL Delay6 ;Delay 7 cycles ERRORLEVEL +306 ENDIF IF LOW(_MM) ==8 ERRORLEVEL -306 PAGE Delay7 CALL Delay7 ;Delay 8 cycles ERRORLEVEL +306 ENDIF IF LOW(_MM) ==9 ERRORLEVEL -306 PAGE Delay8 CALL Delay8 ;Delay 9 cycles ERRORLEVEL +306 ENDIF IF LOW(_MM) ==10 ERRORLEVEL -306 PAGE Delay9 CALL Delay9 ;Delay 10 cycles ERRORLEVEL +306 ENDIF IF LOW(_MM) ==11 ERRORLEVEL -306 PAGE Delay10 CALL Delay10 ;Delay 11 cycles ERRORLEVEL +306 ENDIF IF LOW(_MM) ==12 ERRORLEVEL -306 PAGE Delay11 CALL Delay11 ;Delay 12 cycles ERRORLEVEL +306 ENDIF IF LOW(_MM) ==13 ERRORLEVEL -306 PAGE Delay12 CALL Delay12 ;Delay 13 cycles ERRORLEVEL +306 ENDIF IF LOW(_MM) ==14 ERRORLEVEL -306 PAGE Delay13 CALL Delay13 ;Delay 14 cycles ERRORLEVEL +306 ENDIF IF LOW(_MM) ==15 ERRORLEVEL -306 PAGE Delay14 CALL Delay14 ;Delay 15 cycles ERRORLEVEL +306 ENDIF IF LOW(_MM) ==16 ERRORLEVEL -306 PAGE Delay15 CALL Delay15 ;Delay 16 cycles ERRORLEVEL +306 ENDIF IF LOW(_MM) >16 MOVLW LOW(_MM-1) ERRORLEVEL -306 PAGE DelW CALL DelW ;Delay for 17 thru 255 cycles ERRORLEVEL +306 ENDIF IF HIGH(_MM) !=0 LOCAL _DelMLoop MOVLW HIGH(_MM) ;Delay more for greater than 255 cycles MOVWF DelMCnt _DelMLoop MOVLW 251 ERRORLEVEL -306 PAGE DelW CALL DelW ERRORLEVEL +306 DECFSZ DelMCnt GOTO _DelMLoop ENDIF ENDM ; Eric Smith 7/8/96 Hacked by Richard Ottosen 8/8/99 ;----------------------------------------------------------------------------- ;This version of DelW is for the Scenix parts in Turbo mode. It does not matter ;if the Carry fuse is set or clear. ; DelW delays W cycles, including call, return, and one cycle for the ; MOVLW instruction to set up the count in W ; range is 16..255 ; ; For example, the sequence: ; MOVLW 17 ; CALL DelW ; will take 17 cycles to execute ;----------------------------------------------------------------------------- ; W value on entry: 16 17 18 19 20 21 22 23 ; Caller's instructions: --- --- --- --- --- ----- ----- ----- ; MOVLW n 0 0 0 0 0 0 0 0 ; CALL DelW 1 1 1 1 1 1 1 1 DelW BSF status,cf ; 4 4 4 4 4 4 4 4 SUBWF Fifteen,W ; 5 5 5 5 5 5 5 5 _DelWLp ADDWF Five,W ; 6 6 6 6 6 6 11 7 11 7 11 BTFSS status,cf ; 7 7 7 7 7 7 12 12 12 GOTO _DelWLp ; 8 8 8 BCF status,cf ; 9 9 9 9 9 14 14 14 ADDWF pcl ; 10 10 10 10 10 15 15 15 Delay10 NOP ; 13 Delay9 NOP ; 13 14 Delay8 NOP ; 13 14 15 18 Delay7 NOP ; 13 14 15 16 18 19 Delay6 RETP ; 13 14 15 16 17 18 19 20 ; 16 17 18 19 20 21 22 23 Delay15 NOP Delay14 NOP Delay13 NOP Delay12 NOP Delay11 GOTO Delay8
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