Understanding UART
UART (otherwise known as RS232 or serial) is a time-based protocol. The data travels on two wires.
From the MCU point of view, they are named as follows:
- RX (Receive): The wire on which data comes from the peripheral
- TX (Transmit): The wire on which data goes to the peripheral
The flow control can come in two main flavors:
- With hardware flow control: Two additional control wires control the flow of the data. This hardware flow control itself can come in two flavors: either with control from the master, CTS (Clear To Send), or from the slave, DTR (Data Terminal Ready).
- Without hardware flow control: UART without hardware flow control only takes care of "transporting the bits." There is no logic layer to it.
Error detection is also possible in the form of a parity bit added at the end of the transmission.
It can connect multiple devices but is not taking care of the addressing (the payload will have to take care...
