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MPASM 5.50 M16C5X_TST.ASM 6-22-2013 10:14:54 PAGE 1
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LOC OBJECT CODE LINE SOURCE TEXT
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VALUE
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00001 ;**************************************************************************
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00002 ; M16C5x_Tst.ASM
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00003 ;
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00004 ; This sample program runs on most all PIC devices. To ensure
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00005 ; proper execution, replace the processor specified in the LIST directive
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00006 ; with your target processor.
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00007 ;
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00008 ; Program execution starts at location H'50'. The loop routine executes
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00009 ; seven times. The routines Reduce and Double execute one time for each
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00010 ; loop.
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00011 ;
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00012 ; After the loop executes seven times, the program repeats execution from
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00013 ; the beginning.
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00014 ;
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00015 ;
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00016 ; Variable Initial Description
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00017 ; Value
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00018 ;--------------------------------------------------------------------------
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00019 ; CountDown 255 Decreases to 128 by subtracting Doubler
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00020 ; Doubler 1 Increases to 128 by adding to itself
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00021 ; OuterLoop 7 Decrements by one to 0
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00022 ;
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00023 ;
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00024 ; The program generates the following values:
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00025 ;
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00026 ; Cycle # CountDown Doubler OuterLoop
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00027 ; 0 255 1 7
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00028 ; 1 254 2 6
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00029 ; 2 252 4 5
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00030 ; 3 248 8 4
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00031 ; 4 240 16 3
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00032 ; 5 224 32 2
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00033 ; 6 192 64 1
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00034 ; 7 128 128 0
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00035 ;
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00036 ;**************************************************************************
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00037
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00038 LIST P=16F59, R=DEC
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00039
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00040 ;--------------------------------------------------------------------------
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00041 ; Set ScratchPadRam here. If you are using a PIC16C5X device, use:
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00042 ;ScratchPadRam EQU 0x10
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00043 ; Otherwise, use:
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00044 ;ScratchPadRam EQU 0x20
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00045 ;--------------------------------------------------------------------------
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00046
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00000010 00047 ScratchPadRam EQU 0x10
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00048
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00049 ;--------------------------------------------------------------------------
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00050 ; Variables
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00051 ;--------------------------------------------------------------------------
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00052
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00000010 00053 CountDown EQU ScratchPadRam+0
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MPASM 5.50 M16C5X_TST.ASM 6-22-2013 10:14:54 PAGE 2
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LOC OBJECT CODE LINE SOURCE TEXT
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VALUE
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00000011 00054 Doubler EQU ScratchPadRam+1
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00000012 00055 OuterLoop EQU ScratchPadRam+2
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00056
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00057
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00058 ;--------------------------------------------------------------------------
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00059 ; Program Code
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00060 ;--------------------------------------------------------------------------
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00061 ;--------------------------------------------------------------------------
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00062 ; Set the reset vector here. If you are using a PIC16C5X device, use:
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00063 ; ORG
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00064 ; Otherwise, use:
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00065 ; ORG 0
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00066 ;--------------------------------------------------------------------------
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00067
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07FF 00068 ORG H'7FF'
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Message[306]: Crossing page boundary -- ensure page bits are set.
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07FF 0A50 00069 GOTO Start
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00070
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00071 ;--------------------------------------------------------------------------
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00072 ; Main Program
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00073 ;--------------------------------------------------------------------------
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00074
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0050 00075 ORG H'50'
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00076
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0050 00077 Start
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0050 0CFF 00078 MOVLW 255 ; Initialize the variables to
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0051 0030 00079 MOVWF CountDown ; their starting values.
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0052 0C01 00080 MOVLW 1
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0053 0031 00081 MOVWF Doubler
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0054 0C07 00082 MOVLW 7
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0055 0032 00083 MOVWF OuterLoop
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0056 00084 Loop
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0056 095A 00085 CALL Reduce ; Perform the inner portion of
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0057 02F2 00086 DECFSZ OuterLoop,f ; the loop.
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0058 0A56 00087 GOTO Loop
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00088
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0059 0A50 00089 GOTO Start ; Repeat the whole thing.
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00090
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00091 ;--------------------------------------------------------------------------
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005A 00092 Reduce
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005A 03B1 00093 SWAPF Doubler,f ; Reduce CountDown by the
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005B 0391 00094 SWAPF Doubler,w ; value of Doubler. Then
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005C 03B1 00095 SWAPF Doubler,f ; call the doubling routine.
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005D 00B0 00096 SUBWF CountDown,f
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005E 0960 00097 CALL Double
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005F 0800 00098 RETLW 0
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00099
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00100 ;--------------------------------------------------------------------------
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0060 00101 Double
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0060 03B1 00102 SWAPF Doubler,f ; Double the value of Doubler
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0061 0391 00103 SWAPF Doubler,w ; by adding it to itself.
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0062 03B1 00104 SWAPF Doubler,f
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0063 01F1 00105 ADDWF Doubler,f
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MPASM 5.50 M16C5X_TST.ASM 6-22-2013 10:14:54 PAGE 3
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LOC OBJECT CODE LINE SOURCE TEXT
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VALUE
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0064 0800 00106 RETLW 0
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00107
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00108 END
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MPASM 5.50 M16C5X_TST.ASM 6-22-2013 10:14:54 PAGE 4
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SYMBOL TABLE
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LABEL VALUE
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CountDown 00000010
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Double 00000060
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Doubler 00000011
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Loop 00000056
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OuterLoop 00000012
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Reduce 0000005A
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ScratchPadRam 00000010
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Start 00000050
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__16F59 00000001
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__DEBUG 1
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MEMORY USAGE MAP ('X' = Used, '-' = Unused)
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0040 : ---------------- XXXXXXXXXXXXXXXX XXXXX----------- ----------------
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07C0 : ---------------- ---------------- ---------------- ---------------X
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All other memory blocks unused.
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Program Memory Words Used: 22
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Program Memory Words Free: 2026
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Errors : 0
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Warnings : 0 reported, 0 suppressed
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Messages : 1 reported, 0 suppressed
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