DS1620温度芯片与8751芯片连接代码

;         Full Version for 87C51FA 8K MICro from -67 to 257 degrees F.
;
;                    ASSEMBLED WITH METALINKS ASM51.EXE
;
;            Project: ( Thermostat ), And DS1620 Chip Programmer.
;                   SOFtware For Control & Use of DS1620
;                   Digital Thermometer & Thermostat I.C
;                      Microcontroller ( P87C51FA DIP )
;                           11.0592 MHz Crystal
;                            LCD = { 20 X 4 }
;                      Port connections as follows.
;               Copyright (C) 1998  B. Reynolds EleCTRonics
;
; Micro PIN# TO    LCD  Pin#   Micro Pin# TO   DS1620   Pin#  LCD  Pin#
; p1.0  #1  ---->  db0  #7     p3.0  #10 ----> DQ       #1    GND  #1
; p1.1  #2  ---->  db1  #8     p3.1  #11 ----> CLK/CONV #2    VCC  #2
; p1.2  #3  ---->  db2  #9     p3.2  #12 ----> RST      #3    VR   #3
; p1.3  #4  ---->  db3  #10    p3.3  #13 -------------------> RS   #4
; p1.4  #5  ---->  db4  #11    p3.4  #14 -------------------> R/W  #5
; p1.5  #6  ---->  db5  #12    p3.5  #15 -------------------> E    #6
; p1.6  #7  ---->  db6  #13                    DS1620   PIN#
; p1.7  #8  ---->  db7  #14                    GND      #4
;                                              VCC      #8
; **********************************************************************
; *                    User Data Entry Buttons As Follows              *
; *                                                                    *
; * p2.0 = Up          : increment temperature setting + display.      *
; * p2.1 = Down        : decrement temperature setting + display.      *
; * p2.2 = Enter       : Enter key accepts entry goes to next function.*
; * p2.3 = Stand Alone : Sets DS1620 up for stand alone thermostat     *
; *                    ; operation.                                    *
; * p2.4 = Display     : Display high & low 1620 programmed settings.  *
; * p2.5 = Mode        : Change from ( program ) mode to ( display )   *
; *                    ; mode.                                         *
; * p2.5 is a slide switch, All others are N.O. Momentary Contact.     *
; *                                                                    *
; **********************************************************************
;
;
;
; Setup Equates Table Here, Inform Assembler of Constants

               lcd_data   equ 090h
               config     equ 38h
               entrymode  equ 6
               offcur     equ 0ch
               linecur    equ 0eh
               homecur    equ 02h
               clrDSP     equ 01h
               offdsp     equ 0ah
               ondsp      equ 0eh
               sbuf       equ 99h
               ren        equ 9ch
               ri         equ 98h
               ti         equ 99h
               lcd_rs     equ 0b3h

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