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用8051與1601LCD設(shè)計的計算器
protues仿真原理圖如下：
所有資料下載：
40 用8051與1601LCD設(shè)計的計算器.rar
(35.26 KB, 下載次數(shù): 25)
2016-12-16 16:53 上傳
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單片機匯編源碼（部分內(nèi)容預(yù)覽）：
- /******************************************************************************
- ************ LABCENTER ELECTRONICS ************
- ************ Proteus VSM Sample Design Code ************
- ************ Integer Calculator ( 2K Code Limit) ************
- ********************************************************************************/
- NAME LCD
- ;Set up Code Segment and exports:
- LCD SEGMENT CODE
- RSEG LCD
- PUBLIC _output
- PUBLIC initialise
- PUBLIC clearscreen
- ;LCD Register Addresses.
- LCD_CMD_WR equ 00h
- LCD_DATA_WR equ 01h
- LCD_BUSY_RD equ 02h
- LCD_DATA_RD equ 03h
- LCD_PAGE equ 80h
- ;LCD Commands
- LCD_CLS equ 1
- LCD_HOME equ 2
- LCD_SETMODE equ 4
- LCD_SETVISIBLE equ 8
- LCD_SHIFT equ 16
- LCD_SETFUNCTION equ 32
- LCD_SETCGADDR equ 64
- LCD_SETDDADDR equ 128
- ; Initialisation Routine for the LCD display.
- initialise:
- mov A,#030h ;1 line, 8 bits
- call wrcmd
- mov A,#LCD_SETVISIBLE + 4
- call wrcmd
- mov A,#LCD_SETDDADDR+15 ; Start at right hand side of the display
- call wrcmd
- mov A,#LCD_SETMODE + 3 ; Automatic Increment - Display shift left.
- call wrcmd
- ret
- ; We move the parameter (held in R7) into the Accumulator prior to writing it.
- _output:mov A,R7
- call wrdata
- ret
- ;Clears the LCD display and sets the initialisation conditions.
- clearscreen:
- mov A,#LCD_CLS
- call wrcmd
- mov A,#LCD_SETDDADDR + 15
- call wrcmd
- ret
-
- ;*****************************
- ;******** SUBROUTINES ********
- ;*****************************
- ;Sub routine to write command:
- wrcmd: mov P2,#LCD_PAGE
- mov R0,#LCD_CMD_WR
- movx @R0,A
- jmp wtbusy
- ; Subroutine to Write a Character to the LCD Display.
- wrdata: MOV P2,#LCD_PAGE
- MOV R0,#LCD_DATA_WR
- MOV A,R7
- MOVX @R0,A
- ; Subroutine to wait for a busy clear.
- wtbusy: MOV R1,#LCD_BUSY_RD
- MOVX A,@R1
- JB ACC.7,wtbusy
- ret
- END
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