Real-time image data receiving fault-tolerant method for accidental bus bandwidth insufficiency

Abstract

The invention discloses a real-time image data receiving fault-tolerant method for accidental bus bandwidth insufficiency. The method comprises the followings steps: (1) converting image data from an image receiving clock domain to a bus clock domain and storing the converted image data by utilizing an asynchronous FIFO (First In First Out); (2) when a cache FIFO is in a writeable state, reading the image data from the asynchronous FIFO and writing the image data to the cache FIFO by utilizing a fault-tolerant processing control module; and when both the asynchronous FIFO and the cache FIFO are in a full state, reading the image data from the asynchronous FIFO and discarding the read image data by utilizing the fault-tolerant processing control module; and (3) when the bus bandwidth is normal, reading the image data from the cache FIFO and writing the read image data in a bus by utilizing a bus writing controller. According to the method, a few data which cannot be timely received and the corresponding addresses of the data are discarded, so that the shortcomings that the frame rate of the received images is too low and the system is frequently reset are overcome.

Description

technical field [0001] The invention relates to the field of computer hardware, in particular to a fault-tolerant method for real-time reception of image data with sporadically insufficient bus bandwidth. Background technique [0002] In an image system, it usually includes multiple devices that generate image data, and the multiple devices that generate image data are usually mounted on one bus. The device that generates the image data transmits the image data to the memory or the processor through the bus. Only one device can occupy the bus at a time. When there are many bus devices in an image system or the bus clock frequency is low, the bandwidth that the bus can provide will be stretched. When the bandwidth is insufficient, it will cause the device to write data to storage devices such as DRAM too late. If the image data is simply discarded and the next frame of data is received again, the frame rate of the image will drop, and the direct reset of the system will ca...

AI Technical Summary

Problems solved by technology

If the image data is simply discarded and the next frame of data is received again, the frame rate of the image will drop, and the direct reset of the system will cause frequent resets of the system and affect the system instability

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