Z EQU 2 ; ZERO
PD EQU 3 ; POWER DOWN
TO EQU 4 ; TIMEOUT
PA0 EQU 5 ; NOT USED
PA1 EQU 6 ; NOT USED
;------------------------------------------------------------------------------
; PAGE 0:
;------------------------------------------------------------------------------
ORG 00H
;------------------------------------------------------------------------------
;
; FUNCTION : RESET ()
;
; DESCRIPTION : PROGRAM RESET ROUTINE
;
;------------------------------------------------------------------------------
RESET
MOV LW 000111B ; SETUP RTCC PRESCALER
OPTION
CLRF PORTA ; RESET PORTA
CLRF PORTB ; RESET PORTB
MOV LW TRISA ; SETUP PORTA
TRIS PORTA
MOV LW WRCFG ; SETUP PORTB
TRIS PORTB
CLRF FLAGS ; RESET FLAGS
GOTO M_LOOP ; GOTO MAIN PROGRAM LOOP
;------------------------------------------------------------------------------
;
; FUNCTION : ROT_SHIFT()
;
; DESCRIPTION : RIGHT ROTATE 64 BIT RECEIVE SHIFT REGISTER
;
; NOTE : THIS ROUTINE MUST BE IN THE LOWER HALF OF THE PAGE
;
;------------------------------------------------------------------------------
ROT_SHIFT
RRF CSR7,F
RRF CSR6,F
RRF CSR5,F
RRF CSR4,F
RRF CSR3,F
RRF CSR2,F
RRF CSR1,F
RRF CSR0,F
RETLW 0
;------------------------------------------------------------------------------
;
; FUNCTION : TX_LOOKUP ()
;
; DESCRIPTION : TRANSMITTER ADDRESS CALCULATION
;
; NOTE : THIS ROUTINE MUST BE IN THE LOWER HALF OF THE PAGE
;
;------------------------------------------------------------------------------
TX_LOOKUP
MOV F TXNUM,W ; USE TRANSMITTER NUMBER TO CALCULATE
MOV WF ADDRESS ; ADDRESS OF TRANSMITER BLOCK
CLRC ; MULTIPLY BY 4
RLF ADDRESS,F
RLF ADDRESS,F
MOV LW 04H ; AND ADD 4
ADDWF ADDRESS,F
RETLW 0 ; RETURN
;------------------------------------------------------------------------------
;
; FUNCTION : TST_RTCC ()
;
; DESCRIPTION : UPDATE RTCC COUNTER
;
; NOTE : THIS ROUTINE MUST BE IN THE LOWER HALF OF THE PAGE
;
;------------------------------------------------------------------------------
TST_RTCC
CLRWDT ; RESET WATCHDOG TIMER
MOV LW TRISA ; UPDATE TRI-STATE REGISTER FOR PORTA
上一页 [1] [2] [3] [4] [5] [6] [7] [8] [9] [10] [11] [12] [13] [14] [15] 下一页
本文关键字：源程序 PIC单片机，单片机-工控设备 - PIC单片机
