User interface between a microcontroller and a flexray communications module; flexray user; and method for transmitting messages via such an interface

A user interface system, comprising:

• a user interface between a FlexRay communications module which is connected to a FlexRay communications link over which messages are transmitted and which includes a message memory for one of buffer storing messages from the FlexRay communications link and for the FlexRay communications link;
• and
• a microcontroller which is assigned to the FlexRay communications module and which includes a microprocessor and a direct memory access (DMA) controller for exchanging data with the message memory;
• wherein the user interface has a state machine, which, once configured by the microprocessor of the microcontroller, independently coordinates and controls a data transmission between the message memory of the FlexRay communications module and the DMA controller.

A method for transmitting data, the method comprising:

• transmitting data between a message memory of a FlexRay communications module, which is connected to a FlexRay communications link over which messages are transmitted, and a direct memory access (DMA) controller of a microcontroller;
• configuring a state machine, which, as part of a user interface, is located between the microcontroller and the FlexRay communications module, by a microprocessor of the microcontroller;
• and
• following the configuration, independently coordinating and controlling, by the state machine, the data transmission.