 ****************************************
; Function : 5X7 LED点阵+LCD显示示例程序 *
; MicroProcessor : HT48R50A-1/28SKDIP-A *
; Author: www.picavr.com *
; Crystal : 4MHz *
; ********************************************
#INCLUDE HT48R50A-1.INC
LCD_DATA EQU PB
LCD_DATA_CTRL EQU PBC
LCD_CTRL EQU PC
LCD_CTRL_CTRL EQU PCC
E EQU 5
RS EQU 3
TIME_OUT EQU 11H
CLR_WDT EQU 22H
EXE_HALT EQU 33H
CLR_WDT1_WDT2 EQU 44H
;--------------------------------------------------------------------
DATA .SECTION AT 60H ’DATA’
DELAY_COUNTER_1 DB ? ;[60H]
DELAY_COUNTER_2 DB ? ;[61H]
DELAY_COUNTER_3 DB ? ;[62H]
DATA DB ? ;[63H]
COUNTER DB ? ;[64H]
WARM_RESET DB ? ;[65H]
DISPLAY_FLAG DB ? ;[66H]
;--------------------------------------------------------------------
CODE .SECTION AT 00H ’CODE’
ORG 00H
JMP START
START:
CLR PAC
CLR LCD_DATA_CTRL
CLR LCD_CTRL_CTRL
CLR LCD_DATA
CLR LCD_CTRL
;--------------------------------------------------------------------
MOV A,07H ; set watch dog time out
MOV WDTS,A ; 2.6 sec
CLR WDT ; clear watch dog timer
;--------------------------------------------------------------------
MOV A,WARM_RESET
MOV DISPLAY_FLAG,A
SUB A,TIME_OUT
SZ ACC
JMP CHK_CLR_WDT
JMP GO_TIME_OUT
CHK_CLR_WDT:
MOV A,WARM_RESET
MOV DISPLAY_FLAG,A
SUB A,CLR_WDT
SZ ACC
JMP CHK_EXE_HALT
JMP GO_CLR_WDT
CHK_EXE_HALT:
MOV A,WARM_RESET
MOV DISPLAY_FLAG,A
SUB A,EXE_HALT
SZ ACC
JMP CHK_CLR_WDT_12
JMP GO_EXE_HALT
CHK_CLR_WDT_12:
MOV A,WARM_RESET
MOV DISPLAY_FLAG,A
SUB A,CLR_WDT1_WDT2
SZ ACC
JMP BEGIN
JMP GO_CLR_WDT_12
BEGIN:
CALL LCD_RESET
CLR WDT ; clear watch dog timer
;--------------------------------------------------------------------
GO_TIME_OUT:
MOV A,CLR_WDT
MOV WARM_RESET,A
MOV A,OFFSET LCD_MESSAGE_1
MOV TBLP,A
CALL LCD_DISPLAY
TIME_OUT_LOOP:
CALL LED_DISPLAY
JMP TIME_OUT_LOOP
RET
;--------------------------------------------------------------------
GO_CLR_WDT:
MOV A,EXE_HALT
MOV WARM_RESET,A
MOV A,OFFSET LCD_MESSAGE_2
MOV TBLP,A
CALL LCD_DISPLAY
CLR_WDT_LOOP:
CALL LED_DISPLAY
JMP CLR_WDT_LOOP
RET
;--------------------------------------------------------------------
GO_EXE_HALT:
MOV A,CLR_WDT1_WDT2
MOV WARM_RESET,A
MOV A,OFFSET LCD_MESSAGE_3
MOV TBLP,A
CALL LCD_DISPLAY
EXE_HALT_LOOP:
CALL LED_DISPLAY
JMP EXE_HALT_LOOP
RET
;--------------------------------------------------------------------
GO_CLR_WDT_12:
MOV A,TIME_OUT
MOV WARM_RESET,A
MOV A,OFFSET LCD_MESSAGE_4
MOV TBLP,A
CALL LCD_DISPLAY
CLR_WDT_12_LOOP:
CALL LED_DISPLAY
JMP CLR_WDT_12_LOOP
RET
;--------------------------------------------------------------------
LED_DISPLAY PROC
SET PA
CALL DELAY
MOV A,OFFSET SEGMENT_DATA
MOV TBLP,A
MOV A,10H
MOV COUNTER,A
DISPLAY_START:
TABRDL DATA
MOV A,DATA
MOV PA,A
CALL DELAY
INC TBLP
MOV A,DISPLAY_FLAG
SUB A,CLR_WDT
SZ ACC
JMP LED_CLR_WDT12
CLR WDT
JMP DISPLAY_END
LED_CLR_WDT12:
MOV A,DISPLAY_FLAG
SUB A,CLR_WDT1_WDT2
SZ ACC
JMP LED_EXE_HALT
CLR WDT1
CLR WDT2
JMP DISPLAY_END
LED_EXE_HALT:
MOV A,DISPLAY_FLAG
SUB A,EXE_HALT
SZ ACC
JMP DISPLAY_END
HALT
DISPLAY_END:
SDZ COUNTER
JMP DISPLAY_START
RET
LED_DISPLAY ENDP
;--------------------------------------------------------------------
LCD_RESET PROC
MOV A,30H ; LCD reset , step 1
MOV LCD_DATA,A ;
CALL WRITE ;
CALL DELAY ; LCD reset , step 2
MOV A,30H ; LCD reset , step 3
MOV LCD_DATA,A ;
CALL WRITE ;
CALL DELAY ; LCD reset , step 4
MOV A,30H ; LCD reset , step 5
MOV LCD_DATA,A ;
CALL WRITE ;
MOV A,38H ; LCD setting , step 1
MOV LCD_DATA,A ; function set
CALL WRITE ;
MOV A,06H ; LCD setting , step 2
MOV LCD_DATA,A ; entry mode set
CALL WRITE ;
MOV A,01H ; LCD setting , step 3
MOV LCD_DATA,A ; display clear
CALL WRITE ;
CALL DELAY ;
MOV A,0EH ; LCD setting , step 4
MOV LCD_DATA,A ; display turn on
CALL WRITE ;
RET
LCD_RESET ENDP
;--------------------------------------------------------------------
LCD_DISPLAY PROC
MOV A,01H ; LCD setting , step 5
MOV LCD_DATA,A ; display clear
CALL WRITE ;
CALL DELAY ;
MOV A,80H ; LCD setting , setp 6
MOV LCD_DATA,A ; DD RAM address setting
CALL WRITE ; address = 00h (first line)
SET LCD_CTRL.RS ; LCD setting , step 7
MOV A,10H ; write data to DD RAM
MOV COUNTER,A
DISPLAY1:
TABRDL DATA
MOV A,DATA
MOV LCD_DATA,A
CALL WRITE
INC TBLP
SDZ COUNTER
JMP DISPLAY1
CLR LCD_CTRL.RS
MOV A,0C0H ; LCD setting , step 8
MOV LCD_DATA,A ; DD RAM address setting
CALL WRITE ; address = 40h (second line)
SET LCD_CTRL.RS ; LCD setting , step 9
MOV A,10H ; write data to DD RAM
MOV COUNTER,A
DISPLAY2:
TABRDL DATA
MOV A,DATA
MOV LCD_DATA,A
CALL WRITE
INC TBLP
SDZ COUNTER
JMP DISPLAY2
RET
LCD_DISPLAY ENDP
;--------------------------------------------------------------------
WRITE PROC
SET LCD_CTRL.E
CLR LCD_CTRL.E
MOV A,0FFH
MOV DELAY_COUNTER_1,A
WAIT:
SDZ DELAY_COUNTER_1
JMP WAIT
RET
WRITE ENDP
;--------------------------------------------------------------------
DELAY PROC
MOV A,003H
MOV DELAY_COUNTER_1,A
MOV DELAY_COUNTER_2,A
MOV DELAY_COUNTER_3,A
DELAY_WAIT:
SDZ DELAY_COUNTER_3
JMP DELAY_WAIT
SDZ DELAY_COUNTER_2
JMP DELAY_WAIT
SDZ DELAY_COUNTER_1
JMP DELAY_WAIT
RET
DELAY ENDP
;--------------------------------------------------------------------
ORG 0F00H
LCD_MESSAGE_1: ;[Now , watch dog ]
;[will be time out]
DC 4EH,6FH,77H,20H,2CH,20H,77H,61H
DC 74H,63H,68H,20H,64H,6FH,67H,20H
DC 77H,69H,6CH,6CH,20H,62H,65H,20H
DC 74H,69H,6DH,65H,20H,6FH,75H,74H
LCD_MESSAGE_2: ;[Without time out]
;[Because CLR WDT ]
DC 57H,69H,74H,68H,6FH,75H,74H,20H
DC 74H,69H,6DH,65H,20H,6FH,75H,74H
DC 42H,65H,63H,61H,75H,73H,65H,20H
DC 43H,4CH,52H,20H,57H,44H,54H,20H
LCD_MESSAGE_3: ;[Executing the ]
;[HALT instruction]
DC 45H,78H,65H,63H,75H,74H,69H,6EH
DC 67H,20H,74H,68H,65H,20H,20H,20H
DC 48H,41H,4CH,54H,20H,69H,6EH,73H
DC 74H,72H,75H,63H,74H,69H,6FH,6EH
LCD_MESSAGE_4: ;[Without time out]
;[CLR WDT1 & WDT2 ]
DC 57H,69H,74H,68H,6FH,75H,74H,20H
DC 74H,69H,6DH,65H,20H,6FH,75H,74H
DC 43H,4CH,52H,20H,57H,44H,54H,31H
DC 20H,26H,20H,57H,44H,54H,32H,20H
SEGMENT_DATA: ;7 SEGMENT DISPLAY DATA (COMMON ANODE)
DC 081H,0CFH,092H,086H ;0123
DC 0CCH,0A4H,0A0H,08FH ;4567
DC 080H,084H,088H,0E0H ;89AB
DC 0B1H,0C2H,0B0H,0B8H ;CDEF
;--------------------------------------------------------------------
END
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66821730(技术支持)
