barcode reader asp.net web application SOME BASIC FUNCTIONS in Software

Drawing QR Code in Software SOME BASIC FUNCTIONS

SOME BASIC FUNCTIONS
QR Code 2d Barcode Decoder In None
Using Barcode Control SDK for Software Control to generate, create, read, scan barcode image in Software applications.
QR-Code Encoder In None
Using Barcode generator for Software Control to generate, create QR-Code image in Software applications.
dx: 513 us x: 613 us
Recognize QR Code 2d Barcode In None
Using Barcode reader for Software Control to read, scan read, scan image in Software applications.
Print QR In C#.NET
Using Barcode generator for VS .NET Control to generate, create QR Code ISO/IEC18004 image in Visual Studio .NET applications.
1) Ch 1
Draw QR Code JIS X 0510 In Visual Studio .NET
Using Barcode drawer for ASP.NET Control to generate, create QR image in ASP.NET applications.
Creating QR Code ISO/IEC18004 In .NET Framework
Using Barcode generation for .NET framework Control to generate, create QR Code image in .NET applications.
5 Volt 100 us
Painting QR Code In VB.NET
Using Barcode printer for .NET Control to generate, create Denso QR Bar Code image in .NET applications.
Data Matrix ECC200 Printer In None
Using Barcode creator for Software Control to generate, create Data Matrix image in Software applications.
Figure 20.11 TMR0 application RB7 waveform on an oscilloscope with the prescaler equal to zero.
USS Code 128 Generator In None
Using Barcode generation for Software Control to generate, create ANSI/AIM Code 128 image in Software applications.
Print Barcode In None
Using Barcode maker for Software Control to generate, create barcode image in Software applications.
When you rst run the circuit, you probably will think that TMR0 is actually 0xFF and is not changing state. Actually, if you check the I/O pins with a logic probe or an oscilloscope, you will discover that the pins are switching, with the most signi cant bit (RB7) switching at a rate of just less than 2 kHz, as shown in Fig. 20.11. If you check the other PORTB pins, you will nd that they are switching at higher frequencies, with RB1 switching at a rate of 125 kHz. When you look at the I/O pins, you should notice that RB0 does not switch at all. This is because the Loop code in TMR0.asm takes four instruction cycles, and each time through, the least signi cant bit of TMR0 is always at the same value for each instruction in the loop and will never change relative to the output. This is something that you can see if you simulate the application. To actually see TMR0 changing state, change the addlw 0 instruction in the preceding code above addlw 7, which will change the prescaler from a one to one to one to 128. When the code has been reassembled and put into a PIC microcontroller that is in a circuit, the LED connected to RB7 will ash noticeably. If you put an oscilloscope on RB7, you will nd that it is ashing at a rate of 16 times per second (16 Hz). The RB7 LED ashes should not be individually observable by you. Instead, you should see a ashing blur because 16 Hz is at about the limit of your ability to discriminate between events. If you were to slow down the ashing any more, you would
Drawing EAN-13 Supplement 5 In None
Using Barcode printer for Software Control to generate, create EAN-13 image in Software applications.
GS1 - 12 Maker In None
Using Barcode printer for Software Control to generate, create Universal Product Code version A image in Software applications.
PIC MICROCONTROLLER APPLICATION BASICS
Making Industrial 2 Of 5 In None
Using Barcode generator for Software Control to generate, create 2 of 5 Industrial image in Software applications.
Code 39 Extended Creation In Java
Using Barcode creator for Android Control to generate, create Code 3/9 image in Android applications.
be able to distinguish individual on and off events. If the ashing were any faster (as is the case with RB6), the LED would just appear to be on all the time, although not at the maximum brightness possible because the signal passed to the LED actually would be a PWM signal with a 50 percent duty cycle. This application should give you an appreciation of how fast the PIC microcontroller actually executes. Note that for changes to the TMR0 s most signi cant bit to be noticeable, a prescaler of 256 had to be assigned, which divides the RB7 by 65,356 times.
Generate Code 3 Of 9 In None
Using Barcode maker for Office Excel Control to generate, create Code-39 image in Office Excel applications.
Bar Code Generation In VS .NET
Using Barcode printer for Reporting Service Control to generate, create bar code image in Reporting Service applications.
Random: RANDOM NUMBER GENERATOR
EAN / UCC - 14 Printer In None
Using Barcode maker for Word Control to generate, create UCC-128 image in Microsoft Word applications.
Linear 1D Barcode Generator In Java
Using Barcode creator for Java Control to generate, create Linear Barcode image in Java applications.
The Random.asm application (found in the code\Random subdirectory of the PIC microcontroller directory on your PC) is a collection of the most recent experiments into an application that you should be able to use. Every time the button in the Random circuit (shown in Fig. 20.12 with breadboard wiring diagram in Fig. 20.13 and bill of materials in Table 20.6) is pressed, a new random number will be displayed on the eight LEDs connected to PORTB. The code itself takes advantage of the Debounce macro presented earkier, as well as the TMR0 setup provided in the preceding experiment.
Matrix Barcode Creation In VS .NET
Using Barcode maker for ASP.NET Control to generate, create 2D Barcode image in ASP.NET applications.
Decode UCC - 12 In .NET
Using Barcode scanner for .NET framework Control to read, scan read, scan image in VS .NET applications.
title Random - Produce a Random Number Generator with TMR0 ; ; This Code Displays TMR0 on RB0 every time the Button on RA0 ; is Pressed. ; ; ; Hardware Notes:
Vcc 16F84
Momentary On 10 K RA0 Momentary On
0.1 uF Tantalum Gnd
10 K
4 16
_MCLR Osc 1 Osc 2 Vss
4 MHz
PORTB
Figure 20.12 Random number generating circuit using a debounced button input.
SOME BASIC FUNCTIONS
+5 Volt P/S
10 K
Vcc Gnd
0.1 uF
Momentary On Switch
Figure 20.13 Breadboard wiring for the random number generator circuit.
; ; ; ; ; ; ; ;
PIC16F84 Running at 4 MHz _MCLR is Pulled Up All 8 bits of PORTB are Pulled up and Connected to LEDs PORTA.0 is Pulled up with a Momentary On Pulling to Ground Myke Predko 99.12.26 LIST R=DEC INCLUDE p16f84.inc
TABLE 20.6 PART
BILL OF MATERIALS FOR THE RANDOM EXPERIMENT DESCRIPTION
PIC microcontroller 0.1- F 10-k 220 4-MHz LED Misc.
PIC16F84 04/P 0.1- F tantalum 10 k , 1/4 W 220 , 1/4 W
4-MHz ceramic resonator with internal capacitors 10-LED bargraph display Breadboard, wiring, +5-V power supply
10 K
PIC16F84
4 MHz
PIC MICROCONTROLLER APPLICATION BASICS
; Register Usage CBLOCK 0x020 Dlay:2 ENDC Up EQU 1 Down EQU -1
; ; ; ;
Start Registers at End of the Values Delay Value Flag Value for Debounce Up Flag Value for Debounce Down
; Macros Debounce MACRO Direction if (Direction < 0) ; btfsc PORTA, 0 else btfss PORTA, 0 ; endif goto $ - 1 movlw movwf movlw movwf bcf Going Down
Copyright © OnBarcode.com . All rights reserved.