barcode reader in asp.net 0x05A AND 0x0A5 = 0b001011010 & 0b010100101 = 0b000000000 in Software

Making QR in Software 0x05A AND 0x0A5 = 0b001011010 & 0b010100101 = 0b000000000

0x05A AND 0x0A5 = 0b001011010 & 0b010100101 = 0b000000000
Decoding QR-Code In None
Using Barcode Control SDK for Software Control to generate, create, read, scan barcode image in Software applications.
Generate QR Code In None
Using Barcode generator for Software Control to generate, create QR image in Software applications.
which will set the zero ag.
Recognizing Quick Response Code In None
Using Barcode recognizer for Software Control to read, scan read, scan image in Software applications.
QR Code 2d Barcode Generation In Visual C#
Using Barcode drawer for VS .NET Control to generate, create QR image in VS .NET applications.
THE MICROCHIP PIC MCU PROCESSOR ARCHITECTURE
Make QR Code In VS .NET
Using Barcode drawer for ASP.NET Control to generate, create Denso QR Bar Code image in ASP.NET applications.
Painting QR Code JIS X 0510 In .NET
Using Barcode drawer for .NET framework Control to generate, create Quick Response Code image in Visual Studio .NET applications.
Adding 0 and 0 together obviously will produce a 0 result, but so will the addition of two values that add up to 0x100 (256). This case, that is,
Print QR In Visual Basic .NET
Using Barcode generator for Visual Studio .NET Control to generate, create QR Code image in .NET applications.
Create UPCA In None
Using Barcode encoder for Software Control to generate, create GTIN - 12 image in Software applications.
0x80 + 0x80 = 0b10000000 + 0b10000000 = 0b100000000
Generate Code 39 Extended In None
Using Barcode maker for Software Control to generate, create Code 39 Extended image in Software applications.
Printing Barcode In None
Using Barcode drawer for Software Control to generate, create barcode image in Software applications.
produces the 9-bit result 0x100. Since all processor-accessible registers in the PIC microcontroller are only 8 bits in size, only the least signi cant 8 bits will be stored in the destination. These least signi cant 8 bits are all zeros, so the zero ag will be set as well. This may seem like I have simpli ed the operation of the ALU and the zero ag, but it really is as simple as to de ne the zero ag operation as being set if the stored result is 0 and reset if the stored result is not 0. The carry ag (C) is set when the result of an operation is greater than 255 (0xFF), and this is meant to indicate that any higher-order bytes should be updated as well. In the preceding example (0x80 + 0x80), the result was 0x100, which stored 0x00 in the destination and set the zero ag. In this case, the ninth bit of the result (the 1) would be stored in the carry ag. If the sum were less than 0x100, then the carry ag would have been reset. Along with being used for addition, the carry ag is used for subtraction and shift instructions. The operation of the carry ag is a bit unusual for subtraction and will be discussed in more detail in later chapters, but I wanted to show its operation as it related to the carry ag to introduce you to the operation of the PIC microcontroller Subtract instruction. In the preceding section I noted that subtraction actually was negative addition. For example, 1 taken away from 2 would be
GTIN - 128 Generation In None
Using Barcode printer for Software Control to generate, create UCC-128 image in Software applications.
Bar Code Maker In None
Using Barcode drawer for Software Control to generate, create bar code image in Software applications.
2 1 = 2 + (-1)
UCC - 14 Maker In None
Using Barcode printer for Software Control to generate, create ITF-14 image in Software applications.
Recognize EAN / UCC - 13 In VB.NET
Using Barcode scanner for .NET framework Control to read, scan read, scan image in VS .NET applications.
For the negative number, the two s complement equivalent is calculated, which is
Bar Code Maker In .NET
Using Barcode creation for Reporting Service Control to generate, create bar code image in Reporting Service applications.
Painting Universal Product Code Version A In Java
Using Barcode creation for Eclipse BIRT Control to generate, create UPC A image in Eclipse BIRT applications.
-1 = (1 ^ 0xFF) + 1
Reading UPC-A Supplement 2 In Visual C#
Using Barcode reader for VS .NET Control to read, scan read, scan image in .NET applications.
Bar Code Maker In Java
Using Barcode printer for Android Control to generate, create barcode image in Android applications.
Putting this value back into the preceding formula, subtraction becomes
DataMatrix Encoder In C#.NET
Using Barcode creation for VS .NET Control to generate, create DataMatrix image in VS .NET applications.
Barcode Scanner In Java
Using Barcode scanner for Java Control to read, scan read, scan image in Java applications.
2 1 = = = = 2 + (-1) 2 + (1 ^ 0xFF) + 1 2 + 0xFE + 1 0x101
This value stored into the (8-bit) destination is 0x01 (because the register can only store 8 bits), but the ninth bit, which is used as the carry ag, is set. This means that the actual subtraction result will set the carry ag. This is different from most other processors, in which a positive (or 0) result from a subtraction operation resets the carry ag and sets it if the result is less than 0. In these processors, the carry ag becomes a borrow ag and indicates when a value has to be borrowed from a higher-order byte. In the PIC microcontroller, the carry ag is really a positive ag when it comes to subtraction. If the carry ag is set, then the result is 0 or positive. If the carry ag is reset, then the result is negative. This difference from other processors can make it dif cult
THE PIC MICROCONTROLLER S ALU
to port assembly-language applications directly from other processors to the PIC microcontroller. In the latest Microchip documentation, the carry ag is referred to as a negative borrow ag with respect to subtraction. This is a reasonable way of looking at the execution of the instruction because it is reset when a borrow from the next signi cant byte is required. The digit carry ag is set when the least signi cant nybble (4 bits) of the result is greater than 15 after an arithmetic operation (add or subtract). It behaves identically to the carry ag, except that it is changed only by the result of the least signi cant 4 bits instead of the whole byte. For example, in the operation
0x0A + 0x0A = 0x14
in the PIC microcontroller, the digit carry ag will be set (and the zero and carry ags reset). The digit carry ag may seem to be unnecessary, but as you understand the PIC microcontroller more and more, you will nd opportunities where it is very useful. Later in this book I will show some examples of how it can be used and the functions that it can provide for you. The execution status bits and how different instructions change them will be explained in more detail in 7. I should note that to change any of the three arithmetic STATUS bits from your application, a new value must be explicitly written into them (using the movwf, bcf, or bsf instruction). If the STATUS register is the destination of an arithmetic or bitwise operation, these bits will contain the bit values of the result of the operation, not the value expected to be stored in them. The STATUS register can be added to the PIC microcontroller architecture block diagram to show how the results from the ALU are stored in it. Figure 6.10 shows the PIC microcontroller processor with the STATUS register being written to by the ALU.
Copyright © OnBarcode.com . All rights reserved.