Flow control
AssigneeDigi International Inc.
InventorsMark D. Rustad, Scott A. Davidson, Jeffrey T. Rabe, Robert J. Lipe, Steven R. Wahl
Life of this patent
Estimating the term…
Abstract
A method for controlling a transmitter for a serial data port is provided. The method includes receiving a set of data at the serial data port. The data in the set of data is compared with a selected pattern of bits. When data in the set of data matches the selected pattern of bits, a bit in a register is set. When the bit in the register is set, transmissions stop. The method further includes processing the set of data to determine a flow control state. When processing the set of data determines that the flow control state is a first state, transmissions re-start.
Claims20
A method for controlling transmissions from a serial data port, the method comprising:
- receiving a set of data at the serial data port;
- comparing data in the set of data with a selected pattern of bits;
- when data in the set of data matches the selected pattern of bits, setting a bit in a register;
- when the bit in the register is set, stopping transmissions from the serial data port;
- processing the set of data to determine a flow control state;
- and
- when processing the set of data determines that the flow control state is a first state, restarting transmissions.
A method for controlling transmissions from a serial port, the method comprising:
- stopping transmission when a selected bit in a register is set based on a character match in a set of data received at the serial port;
- determining a flow control state for the serial port based on the received set of data with a software routine running on a processor;
- and
- when the flow control state is a first state, overriding the effect of the register.
A serial port card, comprising:
- a serial port interface for at least one serial port;
- at least one register including at least one bit place that is operable to be set based on a character match in a received set of data received at the at least one serial port, wherein transmissions for the serial port stop when the bit is set;
- and
- a processor communicatively coupled to the serial port interface and the register that includes a software routine that determines a flow control state for the at least one serial port based on the set of data and that overrides the effect of the register when the flow control state is a first state.
Dependencies are inferred from the claim text.