PIC16F628红外接收程序
; Some notes on RC5
;
; 14 RC5 bits:
; SSTAAAAACCCCCC
;
; S: 2 start bits, T: 1 toggle bit, A: 5 address bits, C: 6 command bits
;
; Usually both start bits are high. Extended RC5 uses the 2nd start bit for expanding
; the 6 command bits to 7 bits. After receiving a complete 14 bit word, this bit
; is inverted and added as bit 6 to the register ’RC5_CMD’. The toggle bit is
; copied to bit 7 of ’RC5_CMD’. The 5 LSBs of register ’RC5_ADR’ contain the
; 5 address bits; the 3 MSBs are set to 0.
; Result after a valid code has been received: ;RC5_ADR:000AAAAARC5_CMD:TCCCCCCC
; Note that most IR receiver Chips (e.g. SFH5110-xx) have an active low output, however, the
; PIC’s internal comparator inverts the signal. An inverting driver transistor for the RS232
; interface finally inverts and level shifts the signal again so that the standard LIRC
; configuration (i.e. active low) must be used.
;
;
; PIC16F628 connections
;
; PIN FUNCTION
;
; RB7 ICSP
; RB6 ICSP
; RA5 ICSP
;
; RB5 测试输出，高电平有效
; RB4 PWRin -- PC开关输入低电平有效
; RB3 RESETout --输出晶体管重拨 ，高电平有效
; RB2 PWRout -- 输出晶体管 for MB ATX pwr on/off ，高电平有效
; RB1 LEDgrn -- 输出 LED 绿管 ，高电平有效
; RB0 LEDred -- 输出 LED 红管 ，高电平有效
;
; RA7 4.000 MC Crystal
; RA6 4.000 MC crystal
;
; RA4 (unused)
; RA3 comparator C1 output -- transistor base drive for RS232 TX
; RA2 (internally connected to Vref = 1.25 volts)
; RA1 ATXin -- comparator C2 inverting input for sensing -5 volts of ATX power supply
; RA0 IRin -- comparator C1 inverting input for IR receiver chip
;
;--- Configuration --------------------------------------------------------------------------------
;
; PIC16F628, Power up timer, no watchdog, HS-oscillator, *no* brown out detect, LVP off, CP off,
; MCLRE off, f = 4MHz
list p=16f628
__CONFIG _pwrte_on & _wdt_off & _hs_osc & _boden_off & _lvp_off & _cp_off & _mclre_off
include <p16f628.inc>
;--- Variables [all UPPER CASE] -------------------------------------------------------------------
cbLOCk h’20’
DATA_1 ; 16-bit shift register for incoming RC5 bits
DATA_2 ;
DATA_TMP1 ; temporary register for RC5 codes
DATA_TMP2 ; temporary register for RC5 codes
BITCOUNT ; counter for the RC5 bits
COUNT ; universal temporary count register
TMP ; universal temporary registers
TMP1 ;
TMP2 ;
RC5_ADR ; received RC5 address after clean up: ’000AAAAA’
RC5_CMD ; received RC5 command after clean up: ’0CCCCCCC’
RC5_CMD_TMP ; temporary register for RC5 command
RC5_CMD_TMP_1 ; temporary register for RC5 command
KEYCOUNT ; counts the incoming RC5 pwr-key PACkets to set up a delay
KEYCOUNT_1 ; counts the incoming RC5 0-key packets to set up a delay
RC5_TX_1 ; 16-bit shift register for outgoing RC5 bits
RC5_TX_2 ;
EEADR_TMP ; holds the EEPROM address when calling the EEPROM write subroutine
EEDATA_TMP ; holds the EEPROM data when calling the EEPROM write subroutine
PWR_ON_DELAY ; 00...99 (recalled from EEPROM location h’00’)
PWR_KEY_ADR ; assigned RC5 pwr key address ’000AAAAA’ (recalled from EEPROM location h’01’)
PWR_KEY_CMD ; assigned RC5 pwr key command ’0CCCCCCC’ (recalled from EEPROM location h’02’)
D1 ; temporary registers for delay routines
D2 ;
D3 ;
FLAGS ; flags, see definitions
endc
;--- EEPROM default data --------------------------------------------------------------------------
org h’2100’
; adr content
de d’45’ ; h’00’ PWR_ON_DELAY
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本文关键字：程序 PIC单片机，单片机-工控设备 - PIC单片机
