Hi everyone. I have mainly been using MPLAB X for c. I am attempting to write some code in assembly and am a bit confused. I created a new source file with a general MPASM selected (as opposed to simple MPASM) and got all this up. How do I put my code in here, ready to upload to a PIC? This is what is contained within the template:
Rich (BB code):
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; Filename: *
; Date: *
; File Version: *
; Author: *
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; 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
;*******************************************************************************
;
; 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
;*******************************************************************************
;
; 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
MOVLW 0x55 ; your instructions
GOTO $ ; loop forever
END
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