init_int_pins.s

该文件包含30F的电机控制程序

;START_HEADER
;
; dsPIC30F6014 Demo Source File
; (c) Copyright 2005 Microchip Technology, All rights reserved
;
; --------------------------------------------------------------------------
; File Revision History:
; --------------------------------------------------------------------------
;
; $Log: init_int_pins.s,v $
; Revision 1.3  2005/04/04 23:44:30  VasukiH
; Updates to comments in file header
;
; Revision 1.2  2005/04/04 23:16:04  VasukiH
; Updates for MPLAB C30 v1.30 compatiblity
;
; Revision 1.1.1.1  2003/08/23 00:38:32  VasukiH
; First import of demo source into CVS Repository
;
;
;
; --------------------------------------------------------------------------
;
; Software and Development Tools Info:
; --------------------------------------------------------------------------
; Tool                          Version
; --------------------------------------------------------------------------
; MPLAB IDE                     7.0
; MPLAB C30 Toolsuite           1.30
; dsPICDEM(TM) Processor Board  1.10
; --------------------------------------------------------------------------
;
; File Notes:
; 1. This file contains 2 subroutines for initializing external interrupt
;    pins.
; 2. _init_int_pins will set up the interrupt priorities of pins INT1-4
;    and disable ISR processing. After this subrouine is executed, the
;    _main routine will stall execution until switch S1(INT1) is pressed.
; 3. _init_int_pins_isr will sclear interrupt flag status bits of pins INT1-4
;    and enable ISR processing
;
;END_HEADER



.include "p30fxxxx.inc"


;Global Declarations for routines in Program Memory
.global _init_int_pins

;User code section in Program Memory
.section .text
_init_int_pins:

        bset    INTCON2, #INT4EP       ;Set up INT pins to detect falling edge
        bset    INTCON2, #INT3EP
        bset    INTCON2, #INT2EP
        bset    INTCON2, #INT1EP


        bclr    IPC4, #INT1IP2          ;Set up interrupt pin priorities
        bset    IPC4, #INT1IP1          ;All priorities set to 5
        bclr    IPC4, #INT1IP0

        bclr    IPC5, #INT2IP2
        bset    IPC5, #INT2IP1
        bclr    IPC5, #INT2IP0

        bclr    IPC9, #INT3IP2
        bset    IPC9, #INT3IP1
        bclr    IPC9, #INT3IP0

        bclr    IPC9, #INT4IP2
        bset    IPC9, #INT4IP1
        bclr    IPC9, #INT4IP0

        bclr    IFS1, #INT1IF           ;Clear associated interrupt flag bits
        bclr    IFS1, #INT2IF
        bclr    IFS2, #INT3IF
        bclr    IFS2, #INT4IF

        bset    IEC1, #INT1IE           ;Enable ISR processing for INT pins
        bset    IEC1, #INT2IE           ;at this time
        bset    IEC2, #INT3IE
        bset    IEC2, #INT4IE

        return                          ;Return to calling routine



.end                                    ;EOF