The assignee for this patent, patent number 8631085, is
Reporters obtained the following quote from the background information supplied by the inventors: "Within a network or a bus system, which includes different users connected to each other, suitable formats are selected for transmitting data. The data may be transmitted in frames or data packets, each frame including a defined amount of data. Certain networks may have a hierarchic order of users. It is thus possible that a selected user is configured as master to which the other users configured as slaves are subordinated and/or assigned.
"During a conventional data transmission between a master and a slave, a so-called burst SPI, or a bundled serial peripheral interface, is used, which allows data, which are stored in frames, to be transmitted by bundles."
In addition to obtaining background information on this patent, VerticalNews editors also obtained the inventor's summary information for this patent: "In one example embodiment of the present invention, a so-called burst read or read burst, which enables reading of frames containing any amount and sequence of data by bundles, replaces a burst SPI having a fixed amount and sequence of data. This may result, among other things, in the extension of the address space when data are transmitted between two users which are configured, for example, as devices. The burst read usually includes 16-bit individual frames.
"By using a burst read instead of a burst SPI, data in any sequence and amount may be exchanged. The data include both instructions and payload data, from which information for further uses may be extracted.
"In general, in a 16-bit SPI, a check byte and a data byte are transmitted on the MISO back channel. During a transmission of 16 bits of data, two instructions or instructions and two 16-bit frames are needed.
"In one embodiment of the present invention, an instruction (burst read) and a read instruction as a request for a desired datum, usually a payload datum, are transmitted in the high byte, i.e., the first byte, of a frame during a MOSI transmission, which is not otherwise used in the read operation. In the chronologically subsequent 16-bit frame of the MISO transmission, the entire requested payload datum is transmitted directly, i.e., using a single frame.
"Among other things, the data rate may be increased in a read access to the slave and the address space may be extended for the read access to the slave using the present invention.
"Furthermore, a burst SPI, which cannot be processed with every microcontroller (.mu.c), is replaced. In addition, a more flexible burst read, i.e., reading of frames by bundles, may be provided.
"In one embodiment of the present invention, all 16 bits of the frame are used for implementing the MOSI (master-out-slave-in) function, which provides for output of data from the master and their input in the slave and thus, among other things, a read access to the slave by the master, and an address space is thus extended for the read access. When the MOSI function is implemented, i.e., during a MOSI transmission, the master may request a certain datum in one frame using a read instruction. The datum, for example, a payload datum, is transmitted in the following frame via the MISO (master-in-slave-out) function, using which data are transmitted from the slave to the master, using 16 bits. In burst read, typically no check byte is transmitted. When the burst read is completed, a check byte containing cumulative or appended error flags for the previous transmission may be received in a next or subsequent frame.
"The example method may be performed using a standard 16-bit SPI (16-bit serial peripheral interface), data being transmitted from the master to the slave via the MOSI (master-out-slave-in) function. Similarly, data are transmitted from the slave to the master via the MISO (master-in-slave-out) function. In a read access by the master to the slave, the address to be read is transmitted to the reading address in the high byte, which is the byte of the eight most significant bits, of the MOSI function. The low byte or second byte, which includes the eight least significant bits of the frame, is irrelevant here. First a check byte having 8 bits and then the datum also having 8 bits are transmitted via the MISO function. The check byte usually refers to the previous frame. The data byte may refer to the current or previous frame, which depends on a variant of the serial peripheral interface (SPI) that is used. In another variant of the serial peripheral interface, any desired amount of data is output in 16-bit frames in any desired sequence, using burst read for providing data transmission by bundles.
"The present invention may be used in systems having one master and at least one slave and is, among other things, also suitable for use in a system for a motor vehicle, for example, for evaluating payload data of a lambda sensor.
"The above-described system is designed for performing all steps of the above-presented method. Individual steps of this method may also be performed by individual components of the system. Furthermore, functions of the system or functions of individual components of the system may be implemented as steps of the method. In addition, it is possible to implement steps of the method as functions of individual components of the system or of the entire system."
For more information, see this patent: Kraemer, Ralf. Method for Exchanging Data. U.S. Patent Number 8631085, filed
Keywords for this news article include: Electronics, Data Transmission,
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