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2016-3-21 15:10 上傳
ISIS 7 Professional
自帶的電路仿真圖，壓縮包里面有hex文件，可以直接打開使用
- ; LCD Display Driver Demo.
- ; Timing code assumes 1.2MHz Clock
- ;LCD Registers addresses
- LCD_CMD_WR equ 0
- LCD_DATA_WR equ 1
- LCD_BUSY_RD equ 2
- LCD_DATA_RD equ 3
- ;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
- ;Reset vector
- org 0000h
- jmp start
- ;Start of the program
- org 0100h
- string1a:db ' !! A M A Z I N G !! '
- db 0
- string1b:db '!! A M A Z I N G !! '
- db 0
- string2:db ' A virtual LM032L... '
- db 0
- string3:db ' driven by a virtual '
- db 0
- string4:db ' 8051 processor!'
- db 0
- start: mov A,#038h
- call wrcmd
- loop: mov A,#LCD_SETVISIBLE+6 ;Make the display & blink visible:
- call wrcmd
- mov R7,#2
- loop2:
- mov DPTR,#string1a
- call wrstr
- mov DPTR,#200
- call wtms
- mov A,#LCD_CLS ;Clear screen
- call wrcmd
- mov DPTR,#string1b
- call wrstr
- mov DPTR,#200
- call wtms
- mov A,#LCD_CLS ;Clear screen
- call wrcmd
- djnz R7,loop2
- mov DPTR,#string1a
- call wrstr
- mov DPTR,#400
- call wtms
- mov A,#LCD_SETDDADDR+64
- call wrcmd
- mov DPTR,#string2
- call wrslow
- mov DPTR,#200
- call wtms
- mov A,#LCD_CLS ;Clear screen
- call wrcmd
- mov DPTR,#string3
- call wrslow
- mov A,#LCD_SETDDADDR+64
- call wrcmd
- mov DPTR,#string4
- call wrslow
- mov A,#LCD_SETVISIBLE+7 ;Show the blink cursor as well.
- call wrcmd
- mov DPTR,#2000
- call wtms
- mov A,#LCD_CLS ;Clear screen
- call wrcmd
- jmp loop
- ;Sub routine to write null terminated string at DPTR in program ram.
- wrstr: mov R0,#LCD_DATA_WR
- wrstr1: clr A
- movc A,@A+DPTR
- jz wrstr2
- movx @R0,A
- call wtbusy
- inc DPTR
- push DPL
- push DPH
- pop DPH
- pop DPL
- jmp wrstr1
- wrstr2: ret
- ;Sub routine to write null terminated string at DPTR in program ram. Slowly
- wrslow: mov R0,#LCD_DATA_WR
- wrslw1: clr A
- movc A,@A+DPTR
- jz wrslw2
- movx @R0,A
- call wtbusy
- inc DPTR
- push DPL
- push DPH
- mov DPTR,#100
- call wtms
- pop DPH
- pop DPL
- jmp wrslw1
- wrslw2: ret
- ;Sub routine to write command:
- wrcmd: mov R0,#LCD_CMD_WR
- movx @R0,A
- jmp wtbusy
- ;Sub routine to write character:
- wrchar: mov R0,#LCD_DATA_WR
- movx @R0,A
- ;Subroutine to wait for busy clear
- wtbusy: mov R1,#LCD_BUSY_RD
- movx A,@r1
- jb ACC.7,wtbusy
- ret
- ;Wait for number of seconds in A
- wtsec: push ACC
- call wtms
- pop ACC
- dec A
- jnz wtsec
- ret
- ;Wait for number of milliseconds in DPTR
- wtms: xrl DPL,#0FFh ;Can't do DEC DPTR, so do the loop by forming 2's complement
- xrl DPH,#0FFh ;and incrementing instead.
- inc DPTR
- wtms1: mov TL0,#09Ch ;100 ticks before overflow = 1ms at 1.2MHz Clock
- mov TH0,#0FFh
- mov TMOD,#1 ;Timer 0 mode 1
- setb TCON.4 ;Timer 0 runs
- wtms2: jnb TCON.5,wtms2
- clr TCON.4 ;Timer 0 stops
- clr TCON.5
- inc DPTR
- mov A,DPL
- orl A,DPH
- jnz wtms1
- ret
-
- END
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