- FirstAp
- RegAddr
- Status
- Arith
- MidGoto
- LowGoto
- CondJump
- VarMani
- VarArray
- StackOps
- FirstCal
- StakCall
- CallBUp
- Table0
- ArbTable
- SmallTbl
- StateMC
- LEDOn
- Current Consumption Check
- Debounce
- PinChg
- TimeEnd
- Decouple
- WDT
- PowerUp
- Reset
- TMR0
- Random
- Sleep
- DiffOsc
- EEPROM
- SHORT
- ADCLess
- ADC
- VLadder
- PWMOut
- Cylon
- TMR0Int
- LEDPWM
- IntDeb
- TrueRS
- BasicRS
- SimpRS
- 3RS
- Debug
Useful Code Snippets and Macros
"VarMani" Experiment
This experiment demonstrates the different ways in which simple variables can be accessed in the PICmicro MCU. Arrays and sixteen bit variables are manipulated in later experiments and projects.
The source code listed below can be accessed from the CD-ROM by clicking Here.
title "VarMani - Variable Manipulation."
;
; This Program is meant to be run in the Simulator to show how
; Variables can be manipulated and accessed.
;
; Myke Predko
; 96.05.08
;
; 99.11.01 - Updated for MPLAB
;
; Hardware Notes
; Simulated 16F84
; No I/O
; Use "varmani.pjt" along with "varmani.wat"
;
LIST P=16F84, R=DEC
INCLUDE "p16f84.inc"
; Registers
CBLOCK 0x020
i, j
ENDC
__CONFIG _CP_OFF & _WDT_OFF & _RC_OSC
PAGE
; Mainline of VarMani
org 0
movlw 3 ; Initialized the Variables
movwf i
movlw 5
movwf j
; i = i + 1 - Show how a Register is Incremented, the Result Put Back
incf i, f ; Increment and Store the Result
; j = i + 2 - Now, Add two to a Register and Store it in another one
movlw 2 ; Get the Value to Add
addwf i, w ; Add the Register to it
movwf j ; Store the Added Value
movf i, w ; Now, do the Addition a different way
addlw 2 ; Load then Add, opposite to above
movwf j
; if ( i == j ) then i = i + 1 - Do a simple Comparison with an Add
movf i, w ; Subtract i from j and if the result
subwf j, w ; is equal to zero, increment i
btfsc STATUS, Z
incf i, f
Finished ; Finished, Just Loop Around Forever
goto $
end