barcode reader asp.net web application Register to Display in Software

Generation QR Code in Software Register to Display

Register to Display
QR Decoder In None
Using Barcode Control SDK for Software Control to generate, create, read, scan barcode image in Software applications.
QR-Code Drawer In None
Using Barcode generation for Software Control to generate, create QR Code image in Software applications.
Flags Indicating Button State
Denso QR Bar Code Reader In None
Using Barcode decoder for Software Control to read, scan read, scan image in Software applications.
QR Code Encoder In Visual C#
Using Barcode generation for VS .NET Control to generate, create Denso QR Bar Code image in Visual Studio .NET applications.
__CONFIG _CP_OFF & _WDT_OFF & _XT_OSC & _PWRTE_ON PAGE Mainline of IntDeb org 0 nop clrf Flags ; No Button Pressed Yet
Print Denso QR Bar Code In .NET Framework
Using Barcode creation for ASP.NET Control to generate, create QR-Code image in ASP.NET applications.
QR-Code Generation In .NET
Using Barcode generator for VS .NET Control to generate, create QR-Code image in .NET applications.
I/O WITH INTERRUPTS
Generating QR Code ISO/IEC18004 In VB.NET
Using Barcode maker for Visual Studio .NET Control to generate, create QR Code 2d barcode image in Visual Studio .NET applications.
Make Code 39 Extended In None
Using Barcode creation for Software Control to generate, create Code39 image in Software applications.
clrf goto org 4 Int: btfss goto bcf movlw btfss movlw movwf goto
Generating Code 128A In None
Using Barcode generator for Software Control to generate, create Code 128 Code Set C image in Software applications.
Create DataMatrix In None
Using Barcode generation for Software Control to generate, create Data Matrix 2d barcode image in Software applications.
Reg MainLine ; Interrupt Handler Address
Generating EAN-13 In None
Using Barcode generator for Software Control to generate, create EAN-13 image in Software applications.
GTIN - 128 Maker In None
Using Barcode generation for Software Control to generate, create UCC-128 image in Software applications.
INTCON, T0IF Int_Switch INTCON, T0IF 0x001 PORTB, 0 0x002 Flags Int_End
USPS POSTNET Barcode Drawer In None
Using Barcode creation for Software Control to generate, create USPS POSTal Numeric Encoding Technique Barcode image in Software applications.
EAN / UCC - 13 Reader In .NET Framework
Using Barcode recognizer for .NET Control to read, scan read, scan image in VS .NET applications.
; ; ; ; ; ;
UPC Code Drawer In .NET Framework
Using Barcode encoder for .NET framework Control to generate, create GS1 - 12 image in VS .NET applications.
Code 128B Generator In None
Using Barcode generation for Microsoft Excel Control to generate, create ANSI/AIM Code 128 image in Excel applications.
Do we have a Timer Over ow No - Handle the Switch Yes, Reset Timer Interrupt Request Assume the Button is Up Is the Button Up or Down - If PORTB is Low, Button Down
Reading European Article Number 13 In VB.NET
Using Barcode scanner for .NET framework Control to read, scan read, scan image in Visual Studio .NET applications.
Encoding Barcode In None
Using Barcode generator for Font Control to generate, create barcode image in Font applications.
Int_Switch: bcf clrf movf andlw bsf bcf btfsc bsf bcf clrf Int_End: ret e INTCON, INTF Flags
EAN 13 Creator In Objective-C
Using Barcode maker for iPad Control to generate, create GTIN - 13 image in iPad applications.
2D Barcode Generator In .NET Framework
Using Barcode creation for ASP.NET Control to generate, create Matrix Barcode image in ASP.NET applications.
; Interrupt on the Switch - Reset Timer ; ; Reset the Interrupt Request Indicate that Nothing is Valid
PORTB, 0 ; What is the Button State 1 STATUS, RP0 OPTION_REG ^ 0x080, INTEDG STATUS, Z ; Determine the Actual Edge OPTION_REG ^ 0x080, INTEDG STATUS, RP0 TMR0 ; Going to Wait for another Key Press
PAGE MainLine: movlw movwf movwf movf 0x0FF PORTB PORTA PORTB, w
; Mainline of reading the File Registers
Turn off all the Indicator LED s
PIC MICROCONTROLLER APPLICATION BASICS
andlw
Set 0 if Pin Down
bsf STATUS, RP0 bcf TRISA ^ 0x080, 0 ; RA0 is Output movlw 1 ; RB0 is Input/Interrupt movwf TRISB ^ 0x080 ; Set PORTB.7:1 bits to Output ifdef Debug movlw 0x090 ; Zero Prescaler for TMR0 if Debug btfsc STATUS, Z movlw 0x0D0 ; Pin down, Go for the Rising Edge else movlw 0x096 ; Setup Prescaler for TMR0 to 32.7 msec btfsc STATUS, Z movlw 0x0D6 ; Pin down, Go for the Rising Edge endif movwf OPTION_REG ^ 0x080 bcf STATUS, RP0 clrf movlw movwf Loop: btfss goto btfss goto incf comf movwf movwf goto ButUp $ - 1 ButDown $ - 1 Reg, f Reg, w PORTB PORTA Loop TMR0 ; Reset TMR0
(1 << GIE) | (1 << T0IE) | (1 << INTE) INTCON ; Setup the Interrupt Delays ; Loop to Here for Each Register
; Wait for the Button to be Debounced UP
Wait for Button be to Debounced Down
Increment the Counter Display the Counter Value
There should not be too many surprises in this application for you (although there should be one big one that I will discuss below). The mainline code sets up the interrupts along with the prescaler for TMR0 to cause an interrupt after 32.7 ms. I used this interval for the debounce interval (if no button changes have happened within 32.7 ms,
I/O WITH INTERRUPTS
then the Flags variable bits are set appropriately). The reason for this interval is that the bouncing is greater than the rule-of-thumb 20 ms and did not require any different values to be set in TMR0 I could simply reset it to restart the delay. The interrupt handler code should not be surprising either. It could be written out in pseudocode as
interrupt RB0Debounce() { // Debounce the Button on RB0
if (T0IF != 0) { // if (Button == 0) { // ButUp = 0; ButDown = 1; } else { // ButUp = 1; ButDown = 0; } // TMR0 = 0; // T0IF = 0; } else { // if (Button = 0) // // OPTION.INTEDG = 1; // else OPTION.INTEDG = 0; INTF = 0; // TMR0 = 0; // } // } // end RB0Debounce
Timer Interrupt (32.7 msec Delay) Button Pressed Down Button Released Up
Reset the Timer Button State Changed Wait for Next Button Based on Current State Button Down, Wait for going Up
Reset Button State Reset the Timer
The advantages of this method are that it can be very crisply de ned and written in a high level language (this pseudocode could be ported directly to C), and it does not affect the operation of the mainline code or even other interrupts. If you look back at the interrupt handler in IntDeb earlier, you should be able to match this code very clearly to the pseudocode above. Note that in this application I keep track of the current state of the button and change the INTEDG ag of the OPTION register accordingly. For button debounce routines that are interrupt-based, I would prefer to use the interrupt on port change function of the PIC microcontroller s PORTB pins and ignore this. In this case, I could have created two variables that are set with the PORTB input states when TMR0 over owed and requested an interrupt. In this case, the interrupt handler itself would be a bit simpler, and more than one button could be debounced within an application. When writing the counter value out to the LEDs, note that I arranged it so that the least signi cant bit (which is lost in PORTB owing to the RB0/INT pin) is replicated in PORTA. This means that I don t have to change the bit number of the count register, which simpli es the code and the application quite a bit. Obviously, this action
Copyright © OnBarcode.com . All rights reserved.