摘要:
A method, apparatus, and computer program product for processing health management data for a vehicle. A plurality of modulated signals is received on a bus system in the vehicle. The plurality of modulated signals contains health management data from a plurality of data acquisition units. Each modulated signal has a different frequency from another modulated signal in the plurality of modulated signals to form a plurality of frequencies. The plurality of frequencies is selected to avoid interference with other data transmitted over the bus system by a plurality of data processing systems in the vehicle. The plurality of modulated signals is processed based on the plurality of frequencies used to transmit the plurality of modulated signals.
摘要:
The invention relates to a method and system for secure transmission of process data to be transmitted cyclically in a cyclical data transmission to be performed protocol-specifically via a transmission channel between a user functioning as a master and at least one user functioning as a slave that are connected to the transmission channel. Within a transmission protocol frame, a time slot that can always accommodate the same number of bits independently of the data to be transmitted is assigned to each slave during a data transmission cycle. For safety-relevant process data that is to be transmitted during a data transmission cycle from a slave to at least one additional user, or that is to be transmitted during a data transmission cycle from a user to at least one slave, additional first protection data for recognizing error-free transmission of this safety-relevant process data is generated and transmitted in each case.
摘要:
A method for use in a land-based seismic survey includes: transmitting a plurality of source control commands to a plurality of seismic sources over a VHF/IP network; and managing congestion on the VHF/IP network while transmitting the source control commands. In other aspects, a program storage medium encoded with instructions that, when executed by a processor, perform such a method and a computer programmed to perform such a method.
摘要:
A method for data transmission in a device coupled to a host via a bus is provided. A sequence of data packets are received from the host and the received data packets are stored into a buffering unit of the device. It is then determined whether a predetermined error has occurred. When the predetermined error has occurred, the buffering unit of the device is locked to stop receiving the data packets. Thereafter, the buffering unit of the device is unlocked according to an unlock request from the host to resume receiving subsequent data packets.
摘要:
A method is provided for processing commands issued by a processor over a bus. The method includes the steps of (1) transmitting the command to a remote node to obtain access to data required to complete the command; (2) receiving from the remote node a response packet including a header and a header CRC; (3) validating the response packet based on the header CRC; and (4) before receiving the data required to complete the command, arranging to return the data to the processor over the bus.
摘要:
Method and apparatus to perform cyclic redundancy check computations for error detection are described wherein a first stage includes a first set of computation elements, a first multiplexer and a second multiplexer. A latch is connected to the first stage. A second stage is connected to the latch and the second stage includes a second set of computation elements and a third multiplexer. The first stage and the second stage perform cyclic redundancy check computations for a packet, with the first set of computation elements performing cyclic redundancy check computations for a first set of bytes of input data from the packet, and the second set of computation elements performing cyclic redundancy check computations for a second set of bytes of input data from the packet. Other embodiments are described and claimed.
摘要:
A data bus including a plurality of logic blocks coupled in series, each logic block including at least one buffer for buffering at least one data bit transmitted via the data bus and at least one of the logic blocks further including circuitry coupled in parallel with the at least one buffer and arranged to determine a first bit of error correction code associated with the at least one data bit.
摘要:
A mechanism for managing packetized data transfers in a system including a transmitting and a receiving device. The transmitting device may transmit data to the receiving device in a plurality of packets, each packet a predetermined number of data bytes wide. The transmitting device may include a transfer count unit to maintain a data transfer count based on a number of transmitted data bytes. The receiving device may program the transmitting device with a transfer count mark, which may be a number that corresponds to a specific count of the data transfer count. The transmitting device may calculate a difference between the data transfer count and the transfer count mark. If the difference between the transfer count and the transfer count mark is less than the predetermined number, the transmitting device may transmit a short data packet having less than the predetermined number of data bytes to the receiving device.
摘要:
A data storage system includes a storage processor that is configured to perform load and store operations on a storage array on behalf of external devices. The data storage system also includes a controller that isolates communication between the external devices when coupled to the storage array via the storage processor. The controller further maintains a set of registers that store information associated with the data storage system and allows the storage processor to access the register via an I2C bus. The system utilizes an error detection procedure to allow detection of errors in the data transmitted between the controller and the storage processor. During operation, a checksum value is transmitted between the controller and the storage processor using the I2C bus during a register write or read procedure. The controller and the storage processor utilize the checksum value in an error detection procedure to detect the data errors resulting in transmission of the data by the I2C bus.
摘要:
A host device is configured to read and write information from and into a card and to supply a supply voltage that belongs to a first voltage range or a second voltage range which is lower than the first voltage range, and issues a voltage identification command to the card. The voltage identification command includes a voltage range identification section, an error detection section, and a check pattern section. The voltage range identification section includes information indicating which one of the first voltage range and the second voltage range the supply voltage belongs. The error detection section has a pattern configured to enable the card which has received the voltage identification command to detect errors in the voltage identification command. The check pattern section has a preset pattern.