ここでやろうとしていることを進めるのに少し苦労しています。着信信号をチェックするだけのように IR 受信機をセットアップしています。私は単純なリモコンを使用しています。その上に 0 ～ 9 があり、明らかに 10 の数字です。
ここまでの私のコードは、着信 IR を取得してそれに気付くようになっています。私はそれが何の数字であるかを解読したい。各数字には異なる信号があることを知っており、高値と安値、0と1を介してどの数字が押されているかを理解できますが、それをどの数字に変換して、LCDに表示するためにどこかに置くにはどうすればよいですか.
コードは次のとおりです。
list p=16f690,r=dec ; set processor type, default to base 10
#include <p16f690.inc> ; chip definitions
errorlevel -302 ; bank warnings on +302 off -302
__CONFIG (_INTRC_OSC_NOCLKOUT & _WDT_OFF & _PWRTE_OFF
& _MCLRE_OFF & _CP_OFF & _CPD_OFF & _BOR_OFF & _IESO_OFF & _FCMEN_OFF)
#define IR_PORT PORTA ; IR receiver
#define IR 2 ; IR receiver on RA2
#define SWITCH 3 ; switch on RA3
#define LED_0 0 ; LED on RC0
#define LED_1 1 ; LED on RC1
#define LED_2 2 ; LED on RC2
#define LED_3 3 ; LED on RC3
#define READY 0 ; READY bit
BANK_0 UDATA 0x20 ; bank_0
BANK_0 RES 1 ; variable used for bank switching
state RES 1 ; state bits
bitcount RES 1 ; number of bits seen so far
buffer RES 20 ; the bits
SHARED UDATA_SHR ; shared across all banks
w_temp RES 1 ; variable used for context saving
status_temp RES 1 ; variable used for context saving
pclath_temp RES 1 ; variable used for context saving
RESET_VECTOR CODE 0x000 ; processor reset vector location
goto main ; go to beginning of program
INT_VECTOR CODE 0x004 ; interrupt vector location
goto interrupt ; go to the interrupt service routine
MAIN CODE 0x005 ; address after vectors
interrupt: ; interrupt service routine
movwf w_temp ; save off current W register contents
movf STATUS,w ; move status register into W register
movwf status_temp ; save off contents of STATUS register
movf PCLATH,w ; move pclath register into W register
movwf pclath_temp ; save off contents of PCLATH register
lowedge: ; let's check RA2
btfss INTCON,INTF ; check for type of interrupt = RA2
goto timercheck ; not RA2
bcf INTCON,INTF ; ack the interrupt
movf TMR0,w ; get the value
movwf INDF ; store in buffer
incf FSR,f ; bump the pointer
incf bitcount,f ; count the bit
movf bitcount,w ; pick up the count
sublw 18 ; got all the bits?
btfss STATUS,Z ; check
goto goon ; continue
bsf state,READY ; it is
bcf INTCON,INTE ; turn off RA2 interrupts for now
bcf INTCON,GIE
goon: ; go on
movlw 200 ; prepare
movwf TMR0 ; timeout
bcf INTCON,T0IF ; clear the interrupt flag
bsf INTCON,T0IE ; enable timer 0 interrupts
goto eoi ; we're done
timercheck:
btfss INTCON,T0IF ; check for type of interrupt = TMR0
goto eoi ; is it an alien attack?
bcf INTCON,T0IF ; ack the interrupt
clrf bitcount ; clear the bitcount
bcf state,READY ; clear just in case
movlw buffer ; point at
movwf FSR ; start of buffer
bcf INTCON,T0IE ; disable timer 0 interrupts
BANKSEL BANK_0 ; bank 0
comf PORTC,f ; flip the leds
bcf INTCON,T0IF ; ack the interrupt
eoi: ; end of interrupt
BANKSEL BANK_0 ; bank 0
movf pclath_temp,w ; retrieve copy of PCLATH register
movwf PCLATH ; restore pre-isr PCLATH register contents
movf status_temp,w ; retrieve copy of STATUS register
movwf STATUS ; restore pre-isr STATUS register contents
swapf w_temp,f ; restore pre-isr W register contents
swapf w_temp,w ; (swapf doesn't affect the flags)
retfie ; return from interrupt
main: ; main code
BANKSEL OSCCON ; bank 1
movlw 0x10 ; system clock = 125 kHz
movwf OSCCON ; instruction clock = 7750 Hz, 32uS/instruction
BANKSEL PORTA ; bank 0
clrf PORTA ; init PORTA
BANKSEL ANSEL ; bank 2
clrf ANSEL ; digital I/O
clrf ANSELH ; digital I/O
BANKSEL TRISA ; bank 1
movlw 0xff ; init PORTA
movwf TRISA ; as inputs
BANKSEL PORTC ; bank 0
clrf PORTC ; init PORTC as outputs
BANKSEL TRISC ; bank 1
movlw 0xf0 ; set RC<7:4> as inputs
movwf TRISC ; set RC<3:0> as outputs
BANKSEL PORTC ; bank 0
movlw 0x09 ; init the
movwf PORTC ; leds
clrwdt ; clear WDT and prescaler
BANKSEL OPTION_REG ; bank 1
movlw b'11110000' ; mask TMR0 select and
andwf OPTION_REG,W ; prescaler bits
iorlw b'00000010' ; set prescale to
movwf OPTION_REG ; 1:n
bcf OPTION_REG,T0CS ; make it a timer
bcf OPTION_REG,INTEDG ; select the falling edge of RA2
BANKSEL TMR0 ; bank 0
clrf TMR0 ; clear the count
BANKSEL INTCON ; bank 0
bcf INTCON,T0IF ; clear pending timer 0 interrupts
bcf INTCON,T0IE ; disallow timer 0 interrupts for now
bsf INTCON,INTE ; enable RA2 interrupts
BANKSEL BANK_0 ; bank 0
bcf state,READY ; clear the ready bit
clrf bitcount ; we have seen no bits
movlw buffer ; point at
movwf FSR ; start of buffer
bsf INTCON,GIE ; enable global interrupts
BANKSEL BANK_0 ; bank 0
forever: ; stay here forever
btfss state,READY ; check for IR Code ready
goto forever ; go check again
dobits: ; process ir code
BANKSEL BANK_0 ; bank 0
bcf state,READY ; clear the ready bit
clrf bitcount ; we have seen no bits
movlw buffer ; point at
movwf FSR ; start of buffer
bsf INTCON,INTE ; enable RA2 interrupts
bsf INTCON,GIE ; enable global interrupts
goto forever ; keep doing it
EE CODE 0x2100 ; eeprom
DE 'J', 'A', 'S', 'O', 'N', 0
END