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Questions tagged [parity]

A parity bit, or check bit, is a bit that is added to ensure that the number of bits with the value one in a set of bits is even or odd. Parity bits are used as the simplest form of error detecting code.

A parity bit, or check bit, is a bit that is added to ensure that the number of bits with the value one in a set of bits is even or odd. Parity bits are used as the simplest form of error detecting code.

There are two variants of parity bits: even parity bit and odd parity bit. In case of even parity, the parity bit is set to 1, if the number of ones in a given set of bits (not including the parity bit) is odd, making the number of ones in the entire set of bits (including the parity bit) even. If the number of ones in a given set of bits is already even, it is set to a 0. When using odd parity, the parity bit is set to 1 if the number of ones in a given set of bits (not including the parity bit) is even, keeping the number of ones in the entire set of bits (including the parity bit) odd. when the number of set bits is odd, then the odd parity bit is set to 0.[1]

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Combine 1 bit inputs into single register appropriately

I am programming in verilog and I have a series of 1 bit inputs - say: input SIGNALP, input SIGNAL1, input SIGNAL2, input SIGNAL3, input SIGNAL4, input SIGNAL5, input SIGNAL6, input SIGNAL7 I then want to combine these bits into an 8 bit register,…
Auden Young
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Unable to get value from another contract

I am facing a head scratching issue. I have created two contracts UserRole which has a map of username to a role and a Base contract that has a modifier which checks if the role is < 10. So I deploy the first UserRole contract first and then I…
shresthaal
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How to calculate parity using xor

say we have this number 101001110110010 is this the correct way to calculate the parity using XOR: 10 10 01 11 01 10 01 0 1   1   1   0   1   1   1   0 0        1        0        1 1                  1 0
Mohamed Benkedadra
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are there any advantages for CRC when compared with 2 dimentional parity?

are there any advantage for CRC when compared with 2 dimensional parity?
starcaller
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Creating 2D array of chars as bits in order to calculate parity bit (C)

I have a chunk/buffer of 49 bits (6 bytes + 1 bit) and I want to create a 2D matrix of them (7 rows,7 columns) and calculate parity bit in the 2D method in order to create encoded 8x8 bit array. Other than iterating on every byte and add a parity…
Liron Kreiss
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Parity error, Stage 3 block verification failed

I have a test environment of Parity POA of with 5 nodes. 3 nodes are synchronizing with each other but 2 are not able to synchronize. I am getting following error in the logs of nodes not synchronizing; 2018-03-13 17:19:13 Stage 3 block…
Usman Anwar
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Compute bit parity in CUDA

CUDA has popcount intrinsics for 32-bit and 64-bit types: __popc() and __popcll(). Does CUDA also have intrinsics to get the parity of 32-bit and 64-bit types? (The parity refers to whether an integer has an even or odd amount of 1-bits.) For…
étale-cohomology
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Can the two paritiy bits in the LIN-Datatelegram guarantee that every error is caught in the Identifier Field?

The LIN-TElegram has a protected Identifier Fild with a Frame-ID consisting of 6 bit, followed up by 2 Bits that build the two Parity bits. The first Parity Bit P0 gets calculated like this: Bit0 XOR Bit1 XOR Bit2 XOR Bit4 The second Parity Bit P1…
Kev1n91
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Does parity check always work in error detecting?

I'm confused about how a parity check will check if the data received is correct. To my understanding it just checks if there is an even or odd number of 1's. Because of this wouldn't it only find an error 50% of the time? Like if I send the…
Tyler Hilbert
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Calculating parity in parallel

Consider the following code typedef unsigned uint; uint parity( uint64_t x ) { uint32_t v = x ^ (x >> 32); v ^= v >> 16; v ^= v >> 8; v ^= v >> 4; v ^= v >> 2; return (uint)(v ^ (v >> 1)) & 1; } Is there a way of…
Cecil Ward
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How to read raw serial data using Java?

I am currently implementing Slot accounting system to interface with Slot machines using SAS602. This protocol uses non Standard 9-bit protocol for Serial communication. So the data is 1 start bit + 8 data bit+ 1 stop bit + 1 wake up bit( parity…
Rengas
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application which allows creating virtual serial port with parity support

I am trying to create 2 virtual serial ports in my windows7-64 bit machine to run my applications which communicate over serial ports. I have tried these software:- FreeVirtualSerialPort, KerProAdvancedVirtualComPort, VirtualSerialPortDriver,…
Anand
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Using binary search to retrieve duplicate elements one at a time

My question is: how can I retrieve duplicated elements from an array one at a time. By one at a time I mean that this binary search is within a for loop. E.g: while (index < n){ right_index = binarySearchfo(sorted_array, 0, n-1,…
Eduardo Hashimoto
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Does P0 parity bit error affect other bits in SECDED?

I'm now studying in terms of SECDED thing for error detection and correction. In my work, the spec is that "A SECDED encoded character has been retrieved, with the hexadecimal value of CC9. The SECDED parity is even. Was there an error? And explain…
Allen
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Entering an if statement

In this segment of code, from everything I'm seeing, it should be entering the for loop and then the if statement as long as you enter 1's and 0's, which is what I'm doing. It's not entering it, as I've seen from my print statements. I don't see a…
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