Unidad 2 Microchip licenses this software to you solely for use with Microchip * ; products. The software is owned by Microchip and/or its licensors, and is * ; protected under applicable copyright laws. All rights reserved. * ; * ; This software and any accompanying information is for suggestion only. * ; It shall not be deemed to modify Microchip?s standard warranty for its * ; products. It is your responsibility to ensure that this software meets * ; your requirements. * ; * ; SOFTWARE IS PROVIDED "AS IS". MICROCHIP AND ITS LICENSORS EXPRESSLY * ; DISCLAIM ANY WARRANTY OF ANY KIND, WHETHER EXPRESS OR IMPLIED, INCLUDING * ; BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY, FITNESS * ; FOR A PARTICULAR PURPOSE, OR NON-INFRINGEMENT. IN NO EVENT SHALL * ; MICROCHIP OR ITS LICENSORS BE LIABLE FOR ANY INCIDENTAL, SPECIAL, * ; INDIRECT OR CONSEQUENTIAL DAMAGES, LOST PROFITS OR LOST DATA, HARM TO * ; YOUR EQUIPMENT, COST OF PROCUREMENT OF SUBSTITUTE GOODS, TECHNOLOGY OR * ; SERVICES, ANY CLAIMS BY THIRD PARTIES (INCLUDING BUT NOT LIMITED TO ANY * ; DEFENSE THEREOF), ANY CLAIMS FOR INDEMNITY OR CONTRIBUTION, OR OTHER * ; SIMILAR COSTS. * ; * ; To the fullest extend allowed by law, Microchip and its licensors * ; liability shall not exceed the amount of fee, if any, that you have paid * ; directly to Microchip to use this software. * ; * ; MICROCHIP PROVIDES THIS SOFTWARE CONDITIONALLY UPON YOUR ACCEPTANCE OF * ; THESE TERMS. * ; * ;******************************************************************************* ; * ; Filename: * ; Date: * ; File Version: * ; Author: * ; Company: * ; Description: * ; * ;******************************************************************************* ; * ; Notes: In the MPLAB X Help, refer to the MPASM Assembler documentation * ; for information on assembly instructions. * ; * ;******************************************************************************* ; * ; Known Issues: This template is designed for relocatable code. As such, * ; build errors such as "Directive only allowed when generating an object * ; file" will result when the 'Build in Absolute Mode' checkbox is selected * ; in the project properties. Designing code in absolute mode is * ; antiquated - use relocatable mode. * ; * ;******************************************************************************* ; * ; Revision History: * ; * ;*******************************************************************************
;******************************************************************************* ; Processor Inclusion ; ; TODO Step #1 Open the task list under Window > Tasks. Include your ; device .inc file - e.g. #include <device_name>.inc. Available ; include files are in C:\Program Files\Microchip\MPLABX\mpasmx ; assuming the default installation path for MPLAB X. You may manually find ; the appropriate include file for your device here and include it, or ; simply copy the include generated by the configuration bits ; generator (see Step #2). ; ;*******************************************************************************
; TODO INSERT INCLUDE CODE HERE #include"p16f887.inc" ;******************************************************************************* ; ; TODO Step #2 - Configuration Word Setup ; ; The 'CONFIG' directive is used to embed the configuration word within the ; .asm file. MPLAB X requires users to embed their configuration words ; into source code. See the device datasheet for additional information ; on configuration word settings. Device configuration bits descriptions ; are in C:\Program Files\Microchip\MPLABX\mpasmx\P<device_name>.inc ; (may change depending on your MPLAB X installation directory). ; ; MPLAB X has a feature which generates configuration bits source code. Go to ; Window > PIC Memory Views > Configuration Bits. Configure each field as ; needed and select 'Generate Source Code to Output'. The resulting code which ; appears in the 'Output Window' > 'Config Bits Source' tab may be copied ; below. ; ;*******************************************************************************
; TODO INSERT CONFIG HERE ; CONFIG1 ; __config 0xFFD4 __CONFIG _CONFIG1, _FOSC_INTRC_NOCLKOUT & _WDTE_OFF & _PWRTE_OFF & _MCLRE_OFF & _CP_OFF & _CPD_OFF & _BOREN_ON & _IESO_ON & _FCMEN_ON & _LVP_ON ; CONFIG2 ; __config 0xFFFF __CONFIG _CONFIG2, _BOR4V_BOR40V & _WRT_OFF ;******************************************************************************* ; ; TODO Step #3 - Variable Definitions ; ; Refer to datasheet for available data memory (RAM) organization assuming ; relocatible code organization (which is an option in project ; properties > mpasm (Global Options)). Absolute mode generally should ; be used sparingly. ; ; Example of using GPR Uninitialized Data ; ; GPR_VAR UDATA ; MYVAR1 RES 1 ; User variable linker places ; MYVAR2 RES 1 ; User variable linker places ; MYVAR3 RES 1 ; User variable linker places ; ; ; Example of using Access Uninitialized Data Section (when available) ; ; The variables for the context saving in the device datasheet may need ; ; memory reserved here. ; INT_VAR UDATA_ACS ; W_TEMP RES 1 ; w register for context saving (ACCESS) ; STATUS_TEMP RES 1 ; status used for context saving ; BSR_TEMP RES 1 ; bank select used for ISR context saving ; ;*******************************************************************************
; TODO PLACE VARIABLE DEFINITIONS GO HERE
;******************************************************************************* ; Reset Vector ;*******************************************************************************
RES_VECT CODE 0x0000 ; processor reset vector GOTO START ; go to beginning of program
;******************************************************************************* ; TODO Step #4 - Interrupt Service Routines ; ; There are a few different ways to structure interrupt routines in the 8 ; bit device families. On PIC18's the high priority and low priority ; interrupts are located at 0x0008 and 0x0018, respectively. On PIC16's and ; lower the interrupt is at 0x0004. Between device families there is subtle ; variation in the both the hardware supporting the ISR (for restoring ; interrupt context) as well as the software used to restore the context ; (without corrupting the STATUS bits). ; ; General formats are shown below in relocatible format. ; ;------------------------------PIC16's and below-------------------------------- ; ; ISR CODE 0x0004 ; interrupt vector location ; ; <Search the device datasheet for 'context' and copy interrupt ; context saving code here. Older devices need context saving code, ; but newer devices like the 16F#### don't need context saving code.> ; ; RETFIE ; ;----------------------------------PIC18's-------------------------------------- ; ; ISRHV CODE 0x0008 ; GOTO HIGH_ISR ; ISRLV CODE 0x0018 ; GOTO LOW_ISR ; ; ISRH CODE ; let linker place high ISR routine ; HIGH_ISR ; <Insert High Priority ISR Here - no SW context saving> ; RETFIE FAST ; ; ISRL CODE ; let linker place low ISR routine ; LOW_ISR ; <Search the device datasheet for 'context' and copy interrupt ; context saving code here> ; RETFIE ; ;*******************************************************************************
; TODO INSERT ISR HERE
;******************************************************************************* ; MAIN PROGRAM ;*******************************************************************************
MAIN_PROG CODE ; let linker place main program
START
; TODO Step #5 - Insert Your Program Here
;your instructions
BANKSEL PORTA
CLRF PORTA
BANKSEL ANSEL
BCF STATUS, 6
BANKSEL TRISA ;
MOVLW 80h
MOVWF TRISA
BANKSEL PORTA
led MOVLW 0X01 MOVWF PORTA MOVLW 0X02 MOVWF PORTA MOVLW 0X04 MOVWF PORTA MOVLW 0X10 MOVWF PORTA MOVLW 0X20 MOVWF PORTA MOVLW 0X40 MOVWF PORTA MOVLW 0X80 MOVWF PORTA
BTFSS PORTA, 7
GOTO led
GOTO $
END