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Questions tagged [baud-rate]

"baud-rate" refers to the number of signal or symbol changes that occur per unit time. This tag is for questions that get, set, or otherwise manipulate the baud rate.

In telecommunications and electronics, baud (/ˈbɔːd/, unit symbol "Bd") means symbols per second or pulses per second. A symbol being one of several voltage, frequency, or phase changes.

Thus a "baud-rate" refers to the number of signal or symbol changes that occur over time—most commonly per second. A baud rate differs from a bit-rate in that a single symbol transition (baud) can communicate more than one bit during the interval, whereas a bit rate is a single bit per interval. However, if only two symbols are defined for some system, e.g. "0" and "1", then the baud/bit rates are synonymous.

This tag is OS and Language independent, as long as there's a mechanism for manipulating the serial data rate this tag can apply.

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How to implement "auto baud rate detection" feature on Cortex-M3

in my project I'm trying to implement a Cortex-M0-like UART auto baud rate detection feature on a Cortex-M3, which unfortunately does not have this handy feature on-board. The idea is that the master uses two sync bits (1-0 sequence) at the…
STM32_Guy
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GPS update rate Raspberry pi Jessie Vs. Wheezy

I have scoured the internet to this problem and am unable to find any kind of answer. Here is the gist of the project and what I have done so far Project: Our school participates in sounding rocket competitions. I am in charge of payload and part of…
Harrison Bateman
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A COM Port on a Windows PC indicates the bit rate, or the Baud rate?

If you search around the internet, you can easily find websites, google images, as well as many (YouTube) videos that explain the various properties of COM/serial/RS232 ports. As far as i'm concerned in most of these they state that in the COM port…
KeyC0de
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What value to set the baud rate to

In MATLAB, I am establishing a serial link to an Arduino. Is a higher baud rate always better? I am using 9,600 baud now, but that is merely because it is the most standard value.
AliceD
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Clear data at serial port in Linux in C?

I am testing the sending and receiving programs with the code as The main() function is below: #include "lib.h" int fd; int initport(int fd) { struct termios options; // Get the current options for the port... tcgetattr(fd,…
ipkiss
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Serial Comms baud rate, parity and stop bits. Which options to use and when?

I'm trying to pick up some serial comms for a new job I am starting. I have done some reading which has helped a lot however, a lot of the reading tells you about the specification of serial comms and what everything is, but not when is best to use…
user3103055
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Changing USB Baud Rate from 9600 to 115200 on Android

I have an Arduino which sends data serially in 115200 baud rate. There is an application that receives data from Arduino in 9600 baud rate. The code is // Arduino USB serial converter setup // Set control line state …
ilkengin
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How to Set Baud Rate 28800 Using DCB Structure

Previously I was using CBR_9600 when communicating with 9600 baud devices. But there does not seem to be a CBR_28800 setting. Is it possible to set the baud rate using the DCB structure of 28800?
user195488
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Setting Linux serial baud rate higher than 4 megabaud

Super long story short: is it possible to read from a UART at something close to 12 megabaud? I have a high speed connection that I am trying to read from on a Raspberry Pi. At present, the Raspberry Pi (and as far as I can tell, the world of serial…
Nielsvh
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Is there a way to get supported baud rates in C?

I have an application talking between the PC and a board with a microcontroller running uCLinux. When I send a message over the /dev/TTYS0 I get it on the PC side, however the message comes across as gibberish. I'm pretty sure that I have a baud…
Mike
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Error setting buad rate on ubuntu by pl2303 conector and serialstream.h/libserial

I'm developing a serial communication application on Ubuntu. I'm using a pl2303 converter and libserial. Myy issue is that I'm unable to set the baud rate. After executing the source code below I'm getting error state=2. My source code is: bool…
Nimo shr
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Custom Baud Rate, redux

I am having exactly the problem detailed at Custom baud rate -- SetCommState() fails with baud=921600 but succeeds with baud=115200 -- albeit on Windows 7 64-bit and with a couple of other odd circumstances, as follows: 1) The port I'm talking to,…
Christopher F. Chiesa
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How to Update COM1 port default settings(baud rate,parity) C#

I am using Windows XP Professional edition. As my project requirement i want to update COM1 port default settings to my customized settings. My Computer -> Manage -> Device Manager -> Ports -> Communications Port -> Port Settings -> default settings…
kala
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Serial Port Buffer / Baud Rate / Lost data

I'm using the following code snippet to send gps data accross a com port once a second: serialPort = new SerialPort("COM4", 4800, Parity.None, 8, StopBits.One); serialPort.Handshake = Handshake.None; serialPort.WriteTimeout =…
Serdalis
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Boost::Asio::SerialPort alternative that supports non-standard baud rates?

Does anybody know of a good serial communication library that is a decent alternative to boost::asio::serialport? Boost::Asio::SerialPort does not seem to support non-standard baud rates - like 31250 (it definitely does not seem to work on Mac OS…
Carl
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