Ward Christensen developed XMODEM, a straightforward file transfer protocol, in 1977. It frequently finds application between two computers employing the XMODEM protocol. The protocol initiates transmission with the ‘C’ character, followed by packets. The receiver provides proper acknowledgment (ACK) for each packet. Identification of the last packet is facilitated by EOT, and the completion of transmission is signaled by ETB.
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Embedded Protocol – UART
UART (Universal Asynchronous Receiver/Transmitter) is a standard communication protocol used for serial communication between devices. It’s commonly employed in embedded systems for communication between microcontrollers, sensors, and other peripheral devices.
In the context of embedded systems, UART is often used as a hardware communication protocol, enabling devices to transmit and receive data serially. The UART communication involves two pins: TX (transmit) and RX (receive).
- It’s is full-duplex communication
- UART contains a shift register
- which is the fundamental method of conversion between serial and parallel forms.
- Type of Communication: Asynchronous (No clock).
- Rule: The transmitter and receiver should same baud rate. Data format and transmission speed are configurable.
- UART Uses serial communication over a computer or peripheral device serial port. (Electronics Devices).