?? receiver.asm
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;~~~~~~~~~~~~~~~~~~~~~~~~~ --- By John Lin --- ~~~~~~~~~~~~~~~~~~~~~~~~~
;~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
;
; Hardware Settings
;
; I/O Active Functional Description Init Cond I/O
;
; GP0 1 LED1 0 O
; GP1 1 LED2 0 O
; GP2 1 LED3 0 O
; GP3 1 signal in 0 I
; GP4 1 LED4 0 O
; GP5 1 receive signal LED 0 O
;
processor 12CE519
include <P12ce519.inc>
;********************* USER DEFINED Register definitions ******************
W_STK equ 0x7 ;backup W value
STATUS_STK equ 0x8 ;backup STATUS reg.
PCLATH_STK equ 0x9 ;backup Page flag
TIMES equ 0xa ;apply to count
TIMESd equ 0xb ;apply to count
TIMESp equ 0x1b
countp equ 0xc ;apply to count
countd equ 0xd ;apply to count
recCODE equ 0xe
recBIT equ 0xf
first equ 0x10 ;[0]
FAN equ 0x11 ;[1]
INITcode equ 0x12
DEVNOcode equ 0x13
INSTcode equ 0x14
ENDcode equ 0x15
rINITcode equ 0x16 ;learn code
rDEVNOcode equ 0x17
rINSTcode equ 0x18
rENDcode equ 0x19
GPIO_STK equ 0x1a
; end USER DEFINED Register definitions
;**************************************************************************
; program start and interupt definition
;**************************************************************************
org 0x00
power_on_and_reset
call InitPorts ;[21]
ss btfsc STATUS,7
goto int_handler ;if weak up from sleep
sp
call delay01
call delay01
bcf GPIO,5
sleep
nop
;**************************************************************************
;This routine will define all initial value of PORTS and Registers.
;**************************************************************************
InitPorts
movlw B'001000' ;Port direction
TRIS GPIO
movlw B'000000' ;Port initial value
movwf GPIO
movlw B'00000000'
OPTION
InitRegs
clrf INITcode
clrf DEVNOcode
clrf INSTcode
clrf ENDcode
movlw B'11000011'
movwf rINITcode
movlw B'00001001'
movwf rDEVNOcode
clrf rINSTcode
movlw B'01100000'
movwf rENDcode
return
;**************************************************************************
learn
nop
bsf GPIO,5 ;switch on LED
movlw D'8' ;INIT code bit
movwf recBIT
call receive ;get code
movf recCODE,0 ;store the code
movwf rINITcode
movlw D'8' ;DEVNO code bit
movwf recBIT
call receive ;get code
movf recCODE,0 ;store the code
movwf rDEVNOcode
movlw D'8' ;INST code bit
movwf recBIT
call receive ;get code
movf recCODE,0 ;store the code
movwf rINSTcode
movlw D'8' ;END code bit
movwf recBIT
call receive ;get code
movf recCODE,0 ;store the code
movwf rENDcode
bsf first,0 ;set not first time anymore
bcf GPIO,5 ;switch off LED
goto sp ;finish
;**************************************************************************
int_handler
bsf GPIO,5 ;switch on LED
movlw D'8' ;INIT code bit
movwf recBIT
call receive ;get code
movf recCODE,0 ;store the code
movwf INITcode
movlw D'8' ;DEVNO code bit
movwf recBIT
call receive ;get code
movf recCODE,0 ;store the code
movwf DEVNOcode
movlw D'8' ;INST code bit
movwf recBIT
call receive ;get code
movf recCODE,0 ;store the code
movwf INSTcode
movlw D'8' ;END code bit
movwf recBIT
call receive ;get code
movf recCODE,0 ;store the code
movwf ENDcode
call Decode ;[16]
goto testrc ;for check received code
;**************************************************************************
receive
clrf recCODE
reclp
call delayf
btfss GPIO,3 ;received code is 0 or 1? =[31]
goto rec0 ;if the code is 0
goto rec1 ;if the code is 1
rec0 nop
bcf STATUS,C
goto rrcode
rec1 bsf STATUS,C
goto rrcode
rrcode rlf recCODE,1
decfsz recBIT,1 ;finished?
goto reclp ;if no
return
;**************************************************************************
Decode
bcf GPIO,5 ;switch off LED
movf rINITcode,0 ;check INIT code[18]
subwf INITcode,0
btfss STATUS,Z
return ;if wrong
movf rENDcode,0 ;check END code
subwf ENDcode,0
btfss STATUS,Z
return ;if wrong
movf rDEVNOcode,0 ;check DEVNO code
subwf DEVNOcode,0
btfss STATUS,Z ;
return ;if wrong
DN1
movlw B'00000001' ;check INST code is cycle?
subwf INSTcode,0
btfss STATUS,Z
goto DN2 ;if wrong
E1 clrf GPIO
bsf GPIO,0
return
DN2
movlw B'00000010' ;check INST code is cycle?
subwf INSTcode,0
btfss STATUS,Z
goto DN3 ;if wrong
E2 clrf GPIO
bsf GPIO,1
return
DN3
movlw B'00000011' ;check INST code is cycle?
subwf INSTcode,0
btfss STATUS,Z
goto DN4 ;if wrong
E3 clrf GPIO
bsf GPIO,2
return
DN4
movlw B'00000100' ;check INST code is cycle?
subwf INSTcode,0
btfss STATUS,Z
goto NF ;if wrong
E4 clrf GPIO
bsf GPIO,4
return
NF
movlw B'01000010' ;check INST code is On or Off?
subwf INSTcode,0
btfss STATUS,Z
return ;if wrong
btfss FAN,1 ;FAN on?
goto Fon ;if no
goto Foff
Fon bsf FAN,1
movf GPIO_STK,0
movwf GPIO
return
Foff bcf FAN,1
movf GPIO,0
movwf GPIO_STK
movlw B'00001111'
andwf GPIO_STK,1
clrf GPIO
return
;**************************************************************************
testrc ;test receive code
movlw D'8' ;INIT code bit
movwf recBIT
movf INITcode,0
movwf recCODE
call Print
movlw D'8' ;DEVNO code bit
movwf recBIT
movf DEVNOcode,0
movwf recCODE
call Print
movlw D'8' ;INST code bit
movwf recBIT
movf INSTcode,0
movwf recCODE
call Print
movlw D'8' ;END code bit
movwf recBIT
movf ENDcode,0
movwf recCODE
call Print
goto sp ;finish
Print
bcf GPIO,5
call delay01
call delay01
call delay01
call delay01
printlp
call delay01
call delay01
call delay01
call delay01
bcf GPIO,5
call delay01
call delay01
call delay01
call delay01
bsf GPIO,5
rlf recCODE,1
btfsc STATUS,C
goto on
goto off
on bsf GPIO,4
goto ckkbit
off bcf GPIO,4
goto ckkbit
ckkbit
decfsz recBIT,1
goto printlp
call delay01
call delay01
call delay01
call delay01
bcf GPIO,5
call delay01
call delay01
call delay01
call delay01
return
;**************************************************************************
delayf ;apply to frequency of receive signal
movlw D'1'
movwf TIMESd
movlw D'10' ;F=12+[(X-1)x3] X=10 (14+(12+27)=53us)about 20kHz
movwf countd
goto dlyloop2
dlyloop2
decfsz countd,1
goto dlyloop2 ;no,check again
decfsz TIMESd,1 ;TIMES-1=0?
goto dlyloop2 ;no,loop again
return
delay01 ;apply to key
movlw D'155'
movwf TIMESd
clrf countd
goto delayloop
delayd ;apply to receive delay time
movlw D'1'
movwf TIMESd
movlw D'2' ;D=12+[(X-1)x3] X=2
movwf countd
goto delayloop
delay04
movlw D'20'
movwf TIMESd
clrf countd
goto delayloop
delay255 ;apply to reset
movlw D'255'
movwf TIMESd
clrf countd
goto delayloop
delayloop
decfsz countd,1
goto delayloop ;no,check again
decfsz TIMESd,1 ;TIMES-1=0?
goto delayloop ;no,loop again
return
;**************************************************************************
;This routine will start TMR0 to count time.
;**************************************************************************
StartTMR0
clrf TMR0
return
;**************************************************************************
end
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