3results about How to "Achieve direct access" patented technology

The application discloses a multi-core cache consistency debugging method based on multi-view access and belongs to the field of multi-core processor debugging. The method is characterized in that a target address is specified in a main memory by a host computer through a JTAG debugging interface, five groups of data of CPU view, L1 data cache view, L1 instruction cache view, L2 view and real memory view corresponding to the address are read in turn, whether cache is invalid is judged by comparing data consistency, and a cache level inconsistent is marked. The debugging system comprises a built-in JTAG TAP controller, an enhanced debugging access module, a storage level access arbitrator and a data and state collector. The application realizes direct access of the JTAG interface to data of each level of cache, does not need to modify hardware or disable cache, does not interfere with system operation, can quickly locate cache consistency problems under a multi-core architecture, improves debugging efficiency and accuracy, and is suitable for debugging scenes of large-scale multi-core processors.

This invention discloses a dynamic calibration device for a frequency-adjustable variable cross-section gas flow meter, belonging to the field of gas flow metering technology. The device includes a variable frequency motor, a rotary valve, a fan, a rectifier, a stabilizing section, a contraction section, a development section, and a testing section connected in sequence. The rotary valve consists of a stator and a rotor; the rotor rotation causes the flow cross-sectional area to change sinusoidally, generating a standard sinusoidal flow signal. The variable frequency motor is used to adjust the rotor speed, achieving precise control of the signal frequency. The fan provides suction power. The rectifier, stabilizing, contraction, and development sections are used to ensure the airflow reaches a fully developed laminar flow state. The testing section measures the pressure gradient using a dynamic pressure sensor. This invention also provides a method for obtaining a standard volumetric flow signal by solving the analytical solution of the Navier-Stokes equations based on the pressure gradient. This device solves the problems of difficulty in controlling the generation of dynamic flow signals and the difficulty in directly tracing the source of standard flow, achieving high-precision calibration of the dynamic characteristics of the gas flow meter.

The application discloses a vehicle-mounted network disk audio playing method and device, a storage medium and a vehicle, relates to the technical field of vehicle-mounted audio playing, and comprises the following steps: detecting that a user starts a vehicle-mounted network disk audio application, determining a vehicle-mounted network disk selected by the user based on a preset vehicle-mounted network disk adaptive interface, and determining the authorization state of the vehicle-mounted network disk; in response to the fact that the vehicle-mounted network disk is successfully authorized, acquiring audio resources in the vehicle-mounted network disk; and determining first audio resources to be played from the audio resources according to the current vehicle-mounted network state. The application realizes direct data interaction between a vehicle machine and a vehicle-mounted network disk, breaks the limitation that the prior art does not extend to a vehicle-mounted scene, lays a foundation for subsequent convenient operation and stable playing, does not require the user to copy files to a local storage device in advance, completely breaks through the limitation of the local storage capacity, reduces network consumption of online playing at the same time, guarantees playing stability, and solves the pain points of unstable playing and dependence on a network.