dualdptr.lst

aduc845汇编程序包：wdt,uart,timer2,tic, pllcon,dac,adc,

DUALDPTR                                                                                                      PAGE 1

                       1    ;********************************************************************
                       2    ;
                       3    ; Author        : ADI - Apps            www.analog.com/MicroConverter
                       4    ;
                       5    ; Date          : July 2003
                       6    ;
                       7    ; File          : DualDPTR.asm
                       8    ;
                       9    ; Hardware      : ADuC845
                      10    ;
                      11    ; Description   : Sample Program to show the new ADuC845 features 
                      12    ;                 of dual DPTRs. In Aspire debugger select Program
                      13    ;                 Memory and External Memory from the Debug View Bar.
                      14    ;                 Under Run -> Select Uploadable Areas and under 
                      15    ;                 External Memory type 0-200 and click OK. This enables 
                      16    ;                 real time uploading of these locations from this memory
                      17    ;                 area into the debugger. 
                      18    ;                 NOTE: Several lines of this program will have to be 
                      19    ;                 disabled, most notably the UART configuration section
                      20    ;                 due to the use of the UART debugger. 
                      21    ;********************************************************************
                      22    
                      23    $MOD845                         ; Use ADuC845 predefined symbols
  00B4                24    LED     EQU     P3.4            ; P3.4 drives red LED on eval board
                      25    
                      26    ;____________________________________________________________________
                      27                                                      ; BEGINNING OF CODE
----                  28    CSEG
                      29    
0000                  30    ORG 0000h
                      31    ; highest speed
0000 75D700           32            MOV     PLLCON, #0      ;Disable PLLCON write when using debugger
                      33    
                      34    ; CONFIGURE UART....
                      35    
0003 759E86           36            MOV     T3CON,#86h      ;Will need to disable UART configuration
0006 759D12           37            MOV     T3FD,#12h       ;when using debugger as any writes to UART
0009 759852           38            MOV     SCON,#52h       ;timing or config registers could affect
                      39                                    ;the debugger interface
                      40    ; enable the intenal On-Chip XRAM
                      41            
000C 75AF01           42            MOV     CFG845, #01h
                      43    
                      44    ; move 512 bytes from code memory (adress 1000h -> 1200h) into
                      45    ; data XRAM (address 0000h -> 0200h)
                      46            ; configure the datapointer
000F 900000           47            MOV     DPTR, #0
0012 75A755           48            MOV     DPCON, #55h     ; auto toggle between DPTRs
                      49                                    ; auto increment shadow DPTR
                      50                                    ; auto increment main DPTR
                      51                                    ; select shadow DPTR
0015 901000           52            MOV     DPTR, #1000h
                      53    
0018                  54    COPYDATALOOP:
                      55            ; read Code Memory using Shadow DPTR
0018 E4               56            CLR     A
0019 93               57            MOVC    A, @A+DPTR      ; read code memory
                      58                                    ; auto increment shadow DPTR
DUALDPTR                                                                                                      PAGE 2

                      59                                    ; swap to main DPTR
                      60            ; write to XRAM using main DPTR
001A F0               61            MOVX    @DPTR, A        ; write to XRAM
                      62                                    ; auto increment main DPTR
                      63                                    ; swap to shadow DPTR
                      64            ; check if at end of loop
                      65            ; NOTE:  shadow DPTR selected (not main)
001B E583             66            MOV     A, DPH
001D B412F8           67            CJNE    A, #12h, COPYDATALOOP
                      68    
                      69    
0020 00               70            NOP     ; <----NOTE: Set a breakpoint in the debugger here
                      71                    ; This will show that the values in code memory
                      72                    ; at addresses 1000h thru 1200h has been mapped
                      73                    ; into XRAM at address 0000h thru 0200h.
                      74                    ; The debugger will not run the nextpiece of
                      75                    ; code as this requires the use of the serial port
                      76    
                      77    
                      78    
                      79    
                      80    ; transmit XRAM up UART
0021 75A704           81            MOV     DPCON, #4       ; select main DPTR
                      82                                    ; auto increment DPTR
                      83                                    ; do not toggle DPTR
0024 900000           84            MOV     DPTR, #0
0027 7810             85            MOV     R0, #16
0029                  86    SENDXRAM:
0029 E0               87            MOVX    A, @DPTR
002A 120042           88            CALL    SENDVAL
002D D8FA             89            DJNZ    R0, SENDXRAM
                      90            ; send a newline
002F 740A             91            MOV     A, #10
0031 120058           92            CALL    SENDCHAR
0034 740D             93            MOV     A, #13
0036 120058           94            CALL    SENDCHAR
0039 7810             95            MOV     R0, #16
003B E583             96            MOV     A, DPH
003D B402E9           97            CJNE    A, #2, SENDXRAM
                      98    
0040 80FE             99            JMP     $
                     100    
                     101    
                     102    ;____________________________________________________________________
                     103                                                                ; SENDVAL
                     104    
0042                 105    SENDVAL:        ; converts the hex value of A into two ASCII chars,
                     106                    ; and then spits these two characters up the UART.
                     107                    ; does not change the value of A.
                     108    
0042 C0E0            109            PUSH    ACC
0044 C4              110            SWAP    A
0045 120060          111            CALL    HEX2ASCII
0048 120058          112            CALL    SENDCHAR        ; send high nibble
004B D0E0            113            POP     ACC
004D C0E0            114            PUSH    ACC
004F 120060          115            CALL    HEX2ASCII
0052 120058          116            CALL    SENDCHAR        ; send low nibble
DUALDPTR                                                                                                      PAGE 3

0055 D0E0            117            POP     ACC
                     118    
0057 22              119            RET
                     120    ;____________________________________________________________________
                     121                                                               ; SENDCHAR
                     122    
0058                 123    SENDCHAR:       ; sends ASCII value contained in A to UART
                     124    
0058 3099FD          125            JNB     TI,$            ; wait til present char gone
005B C299            126            CLR     TI              ; must clear TI
005D F599            127            MOV     SBUF,A
                     128    
005F 22              129            RET
                     130    ;____________________________________________________________________
                     131                                                              ; HEX2ASCII
                     132    
0060                 133    HEX2ASCII:      ; converts A into the hex character representing the
                     134                    ; value of A's least significant nibble
                     135    
0060 540F            136            ANL     A,#00Fh
0062 B40A00          137            CJNE    A,#00Ah,$+3
0065 4002            138            JC      IO0030
0067 2407            139            ADD     A,#007h
0069 2430            140    IO0030: ADD     A,#'0'
                     141    
006B 22              142            RET
                     143    ;____________________________________________________________________
1000                 144    ORG 1000h
                     145    
1000 00010203        146    DB  00h,01h,02h,03h,04h,05h,06h,07h,08h,09h,0Ah,0Bh,0Ch,0Dh,0Eh,0Fh
1004 04050607   
1008 08090A0B   
100C 0C0D0E0F   
1010 10111213        147    DB  10h,11h,12h,13h,14h,15h,16h,17h,18h,19h,1Ah,1Bh,1Ch,1Dh,1Eh,1Fh