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DHT15.asm
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DHT15.asm
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JMP MAIN
.ORG 003CH
JMP ISR75
.ORG 0050
MAIN: LXI SP,FFFFH
CALL LCD_INIT
;MVI A,41H
;CALL LCD_SEND
;CALL WELCOME
;CALL DELAY_1 ; 1 sec delay
;MVI A,42H
;CALL LCD_SEND
MVI A,CFH
SIM
CALL DELAY_1
MVI A,CFH
SIM
MVI A,4FH
SIM
CALL DELAY_20
MVI A,CFH
SIM
;MVI A,43H
;CALL LCD_SEND
CALL DELAY_20U
CALL DELAY_20U
CALL DELAY_20U
CALL DELAY_20U
CALL DELAY_20U
CALL DELAY_20U
CALL DELAY_20U
CALL DELAY_20U
CALL DELAY_20U
CALL DELAY_20U
;CALL DELAY_80
;CALL DELAY_80
L1: ;RIM
;ANI 80H
;JNZ L1
L2: ;RIM
;ANI 80H
;JZ L2
TEMP: ;RIM
;ANI 80H
;JNZ TEMP
;MVI A,30H ; CONTROL WORD FOR 8254
;CALL LCD_SEND
;OUT 03H ; PORT ADDRESS OF CONTROL REGISTER
;MVI A,FFH ; LOW ORDER BYTE
;OUT 00H
;MVI A,FFH ; HIGH ORDER BYTE
;OUT 00H
;LXI H,8000H
;MVI A,43H
;CALL LCD_SEND
MVI A,0BH
SIM
EI
MVI A,28H
L3: JNZ L3
DI
LXI H,8000H
CALL DATA_GET
STA 9000H
CALL DATA_GET
STA 9001H
CALL DATA_GET
STA 9002H
CALL DATA_GET
STA 9003H
; BINARY TO BCD CONVERTION
LXI H,9000H
MOV A,M
CALL PWRTEN
LXI H,A000H
MOV A,M
ADI 30H
CALL LCD_SEND
INX H
MOV A,M
ADI 30H
CALL LCD_SEND
INX H
MOV A,M
ADI 30H
CALL LCD_SEND
MVI A,20H
CALL LCD_SEND
LXI H,9001H
MOV A,M
CALL PWRTEN
LXI H,A000H
MOV A,M
ADI 30H
CALL LCD_SEND
INX H
MOV A,M
ADI 30H
CALL LCD_SEND
INX H
MOV A,M
ADI 30H
CALL LCD_SEND
MVI A,20H
CALL LCD_SEND
LXI H,9002H
MOV A,M
CALL PWRTEN
LXI H,A000H
MOV A,M
ADI 30H
CALL LCD_SEND
INX H
MOV A,M
ADI 30H
CALL LCD_SEND
INX H
MOV A,M
ADI 30H
CALL LCD_SEND
MVI A,20H
CALL LCD_SEND
LXI H,9003H
MOV A,M
CALL PWRTEN
LXI H,A000H
MOV A,M
ADI 30H
CALL LCD_SEND
INX H
MOV A,M
ADI 30H
CALL LCD_SEND
INX H
MOV A,M
ADI 30H
CALL LCD_SEND
MVI A,20H
CALL LCD_SEND
HLT
PWRTEN: LXI H,A000H
MVI B,64H
CALL BINBCD
MVI B,0AH
CALL BINBCD
MOV M,A
RET
BINBCD: MVI M,FFH
NXTBUF: INR M
SUB B
JNC NXTBUF
ADD B
INX H
RET
DATA_GET: MVI B,07H
MVI D,00H
L4: MOV A,D
MOV C,M
ORA C
RLC
INX H
DCR B
MOV D,A
MOV A,B
JNZ L4
MOV A,D
MOV C,M
ORA C
RET
DELAY_20: PUSH B
LXI B,681H
LOOP_20: DCX B
MOV A,B
ORA C
JNZ LOOP_20
POP B
RET
DELAY_20U: PUSH PSW
MVI A,01H
LOOP_20U: DCR A
JNZ LOOP_20U
POP PSW
RET
DELAY_1: PUSH B
PUSH D
MVI B,2EH
Loop1: MVI C,6AH
Loop2: MVI D,1CH
Loop3: DCR D
JNZ Loop3
DCR C
JNZ Loop2
DCR B
JNZ Loop1
POP D
POP B
RET
DELAY: PUSH PSW
MVI A,0FH
LOOP: DCR A
JNZ LOOP
POP PSW
RET
LCD_INIT : MVI A,24H
OUT 01H
MVI A,20H
OUT 01H
CALL DELAY
MVI A,24H
OUT 01H
MVI A,20H
OUT 01H
CALL DELAY
MVI A,84H
OUT 01H
MVI A,80H
OUT 01H
CALL DELAY
MVI A,04H
OUT 01H
MVI A,00H
OUT 01H
CALL DELAY
MVI A,E4H
OUT 01H
MVI A,E0H
OUT 01H
CALL DELAY
MVI A,04H
OUT 01H
MVI A,00H
OUT 01H
CALL DELAY
MVI A,64H
OUT 01H
MVI A,60H
OUT 01H
RET
LCD_SEND: PUSH PSW
PUSH B
PUSH D
MOV B,A
ANI F0H
MVI D,0CH
ORA D
OUT 01H
CALL DELAY
ANI F8
OUT 01H
MOV A,B
RLC
RLC
RLC
RLC
ANI F0H
MVI D,0CH
ORA D
OUT 01H
CALL DELAY
ANI F8H
OUT 01H
POP D
POP B
POP PSW
RET
ISR75: PUSH PSW
PUSH B
;CPI 29H
;JNZ ISR_HELP
MVI B,00H
ISR_L1: RIM
ANI 80H
INR B
JNZ ISR_L1
MOV A,B
CPI 03H
JC BIT_0
JNC BIT_1
INX H
POP B
POP PSW
DCR A
EI
RET
BIT_0 : PUSH PSW
MVI A,00H
MOV M,A
POP PSW
RET
BIT_1: PUSH PSW
MVI A,01H
MOV M,A
POP PSW
RET
ISR_HELP: MVI A,00H
OUT 03H
IN 00H
MOV C,A
IN 00H
MOV B,A
PUSH B
MOV A,E ; SUBTRACTING TWO 16 BIT NUMBERS
SUB C
MOV C,A
MOV A,D
SBB B
MOV B,A
LCD_COMM: CALL DELAY
MVI A,5CH
OUT 01H
MVI A,58H
OUT 01H
CALL DELAY
MVI A,7CH
OUT 01H
MVI A,78H
OUT 01H
CALL DELAY
MVI A,4CH
OUT 01H
MVI A,48H
OUT 01H
CALL DELAY
MVI A,5CH
OUT 01H
MVI A,58H
OUT 01H
CALL DELAY
MVI A,4CH
OUT 01H
MVI A,48H
OUT 01H
CALL DELAY
MVI A,CCH
OUT 01H
MVI A,C8H
OUT 01H
CALL DELAY
MVI A,4CH
OUT 01H
MVI A,48H
OUT 01H
CALL DELAY
MVI A,3CH
OUT 01H
MVI A,38H
OUT 01H
CALL DELAY
MVI A,4CH
OUT 01H
MVI A,48H
OUT 01H
CALL DELAY
MVI A,FCH
OUT 01H
MVI A,F8H
OUT 01H
CALL DELAY
MVI A,4CH
OUT 01H
MVI A,48H
OUT 01H
CALL DELAY
MVI A,DCH
OUT 01H
MVI A,D8H
OUT 01H
CALL DELAY
MVI A,4CH
OUT 01H
MVI A,48H
OUT 01H
CALL DELAY
MVI A,5CH
OUT 01H
MVI A,58H
OUT 01H
CALL DELAY
MVI A,2CH
OUT 01H
MVI A,28H
OUT 01H
CALL DELAY
MVI A,1CH
OUT 01H
MVI A,18H
OUT 01H
DELAY_80: PUSH PSW
MVI B,0BH
DELAY_80Loop: DCR B
JNZ DELAY_80Loop
POP PSW
RET