#C program for stop and wait protocol serial#
In asynchronous serial data communication, the baud rate is limited to 100Kbps.Pentium-based PCs transfer data at rates as high as 56Kbps.IBM PC/XT could transfer data at the rate of 100 to 9600 bps.The data transfer rate of given computer system depends on communication ports incorporated into that system.In modems, there are occasions when a single change of signal transfers several bits of data. It is modem terminology and is defined as the number of signal changes per second. Another widely used terminology for bps is baud rate. The rate of data transfer in serial data communication is stated in bps (bits per second).Assuming that we are transferring a text file of ASCII characters using 1 stop bit, we have a total of 10 bits for each character including 8 character with 1 start and 1 stop bit. In modern PCs, the use of one stop bit is standard. Due to the extended ASCII Characters, 8-bit ASCII data is common. The start bit is always one bit, but the stop bit can be one or two bits.(2) Block-oriented data transfers use the synchronous method
(1) Each character is placed in between start and stop bits, this is called framing (8-bit = single character) Asynchronous serial data communication is widely used for character-oriented transmissions.Asynchronous method transfers a single byte at a time.Synchronous method transfers a block of data at a time.Serial data communication uses two methods:.