lookrs232.com
Look RS232 - RS 232 (serial port) programming
http://www.lookrs232.com/rs232/history_rs232.htm
Thus there emerged a task of producing a new standard which could guarantee reliable connection and simplicity of decisions, at the same time this standard could be used by various communication equipment manufacturers without problems of compatibility with devices by other manufacturers.Thus usage of such a solution could turn out profitable at repetition work. For more than 30 years from creation of EIA interface three standard modifications have been worked out:. Further development of the standard wa...
lookrs232.com
Look RS232 - RS 232 (serial port) programming
http://www.lookrs232.com/rs232/nullmodem.htm
A Null Modem is used to connect two DTE's together. It is usually used as the cheapest way of managing multiplayer games and files transmission betwen the computers using Zmodem Protocol, Xmodem Protocol etc. This can also be used with many Microprocessor Development Systems. Null Modem Wiring Diagram. FCoder 1998 - 2002.
lookrs232.com
Look RS232 - RS 232 (serial port) programming
http://www.lookrs232.com/serial_port/serial_port.htm
Is able to read and write to RS232 port. Is able to read and write to RS232 port. Serial port is a communications port. Such devices as modem, mouse or serial printer can be connected to it. The serial type of information exchange used provides for serial transmission. Of information (bitwise).Usually data can be transmitted in both directions (duplex mode). Today most PC serial ports comply with RS-232-C. Standard or RS-422 standard. FCoder 1998 - 2002.
lookrs232.com
Look RS232 - RS 232 (serial port) programming
http://www.lookrs232.com/serial_port
The methods of serial data transmission imply that data are transmitted the following way: data are transmitted from transmitter to receiver bitwise simultaneously uing only one line.For this purpose the serial port takes 8, 16 or 32 parallel bits from the data bus and transforms them to get 8, 16 or 32-bit serial bit flow. That's why serial communication got its name - every information bit is transmitted serially one by one. FCoder 1998 - 2002.
lookrs232.com
Look RS232 - RS 232 (serial port) programming
http://www.lookrs232.com/serial_port/index.htm
The methods of serial data transmission imply that data are transmitted the following way: data are transmitted from transmitter to receiver bitwise simultaneously uing only one line.For this purpose the serial port takes 8, 16 or 32 parallel bits from the data bus and transforms them to get 8, 16 or 32-bit serial bit flow. That's why serial communication got its name - every information bit is transmitted serially one by one. FCoder 1998 - 2002.
lookrs232.com
Look RS232 - RS 232 (serial port) programming
http://www.lookrs232.com/rs232/likely_problems.htm
Absence or loss of data flow control signals (connection confirmation) which leads to buffers overflow or connection abortion;. Incorrect connection when using cables (DTE and DCE), it mainly leads to incorrect connection of receiving and transmitting lines, though any other control signals can be connected incorrectly;. Incorrect configuration of the socket type or pins position, that impedes the connection according to the circuit. FCoder 1998 - 2002.
lookrs232.com
Look RS232 - RS 232 (serial port) programming
http://www.lookrs232.com/rs232/speeds.htm
Today most people have 28.8K or 33.6K modems. That's why we should understand that DCE to DCE speed would be 28.8K or 33.6K. To use such modem speeds we should use aproximate DTE to DCE speed of 115,200 BPS.(Maximum Speed of the 16550a UART). These speeds are sometimes confusing, sometimes people think that 9.6 KBPS, 14.4 KBPS etc. are modem speeds. FCoder 1998 - 2002.
lookrs232.com
Look RS232 - RS 232 (serial port) programming
http://www.lookrs232.com/rs232
RS-232-C interface is a serial interface of synchronous and asynchronous data transmission defined by the EIA RS-232-C standard and V.24 CCITT recommendations, this interface was initially. Created to connect the computer with a terminal. Today it is widely used for various purposes. EIA RS-232-C, CCITT V.24. Full duplex, from point to point. FCoder 1998 - 2002.
lookrs232.com
Look RS232 - RS 232 (serial port) programming
http://www.lookrs232.com/rs232/types_uart.htm
Types of UARTS (For PC's). The first UART in this line. It doesn't contain any scratch registers. 8250A is a modernized version of 8250, its bus operating speed is very fast. The bus operating speed of this UART is greater than 8250's. It is used in the same way as 16450 in the sphere of software. Very similar to that of the 8250 UART. Used in AT's (Improved bus speed over 8250's). Works stable at 38.4KBPS. Widespread today. Produced by Texas Instruments. Contains 64-byte FIFO buffer. FCoder 1998 - 2002.
