In communication protocols, flow control is used to manage the rate of data transmission between two devices. The terms "RT" (Receive Transfer), "TX" (Transmit), and "RR" (Receive Ready) are often found in the context of serial communication settings.
The configuration you should choose depends on your specific application and the requirements of your communication setup:
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Flow Control Disabled: This setting means that there will be no handshaking or control signals sent between the two devices to manage the flow of data. This is typically used for simple, point-to-point connections where the sending device can send data at its own pace and the receiving device can handle it without any assistance.
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RT and TX Enabled: This configuration ensures that the receiving device can request the transmission to take place when it is ready, allowing for better management of the data flow.
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RR Enabled or TX Enabled:
- RR (Receive Ready) Enabled: This option allows the receiving device to inform the sender when it is ready to receive more data, potentially preventing data loss.
- TX (Transmit) Enabled: This usually means that the device is set up to send data. However, it might not manage the receiving status, which could lead to data overruns if the receiver can't keep up.
Generally, if both devices can handle flow control, enabling it (like having RT and RR) is beneficial in most cases as it provides better management of data flow and reduces the risk of buffer overruns. Conversely, if you're working in an environment with low data requirements or where both devices are closely matched in speed, disabling flow control might be adequate.
Ultimately, consider factors such as data volume, the processing speed of the devices, and the potential for data loss to make the most appropriate choice for your scenario.