CodePudding user response:
Such as: baud rate 115200=115200 (bit/SEC),If you don't check digit should be divided by 10, get the number of bytes per second: 115200=115200 baud rate (bits/SEC)=11520 (bytes/second), divided by 1024, is the KB per second: 115200=115200 baud rate (bits/SEC)=11.25 (KB/s),
If one parity bit, it should be divided by 11, get the number of bytes per second, finally it is concluded that: 115200=115200 baud rate (bits/SEC)=10.27 (KB/s)
CodePudding user response:
Remember to put the knot of the post if satisfiedCodePudding user response:
Baud rate is mainly used in the asynchronous serial communicationIf UART communication, UART as an asynchronous serial port communication protocol, the working principle of each character is to transmit data to a pick up a transmission,
The meaning of you are as follows:
Start bit: to signal that a logic "0", said the beginning of the transmission characters,
Data bits: then after the start bit, the number of data bits can be 4,5,6,7,8 etc, constitute one character at a time, usually USES the ASCII code, starting from the lowest transmission, by the clock localization,
Parity bit: data bits plus after this one, made the digit "1" should be an even number, parity checking) or odd (odd), in order to verify the correctness of the data transfer,
Stop bit: it is the end of a character data, can be 1, 1.5 a, two high level, because the data is in timing on a transmission line, and each device has its own clock, probably in the communication between two devices appeared a little out of sync, so stop bit is not just said the end of the transmission, and to provide computer clock synchronization correction opportunities, apply to stop the more digits, the greater the tolerance of different clock synchronization, data transfer rate but also the slower at the same time,
Free: in a logic "1" state, said there was no data transfer on the current line,
Baud rate: is a measure of data transfer rate according to send the number of symbols per second (symbol), a symbol represents the amount of information (bits) is associated with the order number of symbols, such as transmission symbols used 256 order, every 8 bit represents a symbol, data transfer rate is 120 characters per second, the baud rate is 120 baud, bit rate is 120 * 8=960 bit/s, the concept of the two is easy to make a mistake,
To transmit a byte, if contains eight bits (one byte) contains a start bit and stop bit, each a parity bit, each byte transfer need 11,
115200 - bit/s=115200/11/1024 kbyte/s=10.23 kB/s
CodePudding user response:
/1000/10 should be ok