Storage management strategy can be expressed by a file system. Commercial file system for embedded application is generally complicated and resource wasted. In this paper, a specified file system adapted to embedded s...Storage management strategy can be expressed by a file system. Commercial file system for embedded application is generally complicated and resource wasted. In this paper, a specified file system adapted to embedded system with flash-based memory is developed. To guarantee the average usage of flash storage sectors, the strategy of wear leveling and adaptive damage management is introduced, in which a dynamic storage space management mode and the strategy of first in first out (FIFO) are adopted. Moreover, the strategy of redundancy design and fast-calculation and tracing is also adopted to extend the life of kernel sector, which can guarantee the reliable service of system booting. The practical application in an embedded CNC (computerized numerical control) platform proves that the file system has effective performance. Furthermore, the flash file system can be transplanted to different embedded platforms by changing a few bottom hardware parameters with universality.展开更多
To solve the Flash-based FPGA in the manufacturing process,the ion implantation process will bring electrons into the floating gate of the P-channel Flash cell so that the Flash switch is in a weak conduction state,re...To solve the Flash-based FPGA in the manufacturing process,the ion implantation process will bring electrons into the floating gate of the P-channel Flash cell so that the Flash switch is in a weak conduction state,resulting in the Flash-based FPGA eigenstate current problem.In this paper,the mechanism of its generation is analyzed,and four methods are used includ-ing ultraviolet light erasing,high-temperature baking,X-ray irradiation,and circuit logic control.A comparison of these four methods can identify the circuit design by using circuit logic to control the path of the power supply that is the most suitable and reliable method to solve the Flash-based FPGA eigenstate current problem.By this method,the power-on current of 3.5 mil-lion Flash-based FPGA can be reduced to less than 0.3 A,and the chip can start normally.The function and performance of the chip can then be further tested and evaluated,which is one of the key technologies for developing Flash-based FPGA.展开更多
基金Supported by National Natural Science Foundation of China (No50475117)Specialized Research Fund for the Doctoral Program of Higher Education of China (No20060056016)
文摘Storage management strategy can be expressed by a file system. Commercial file system for embedded application is generally complicated and resource wasted. In this paper, a specified file system adapted to embedded system with flash-based memory is developed. To guarantee the average usage of flash storage sectors, the strategy of wear leveling and adaptive damage management is introduced, in which a dynamic storage space management mode and the strategy of first in first out (FIFO) are adopted. Moreover, the strategy of redundancy design and fast-calculation and tracing is also adopted to extend the life of kernel sector, which can guarantee the reliable service of system booting. The practical application in an embedded CNC (computerized numerical control) platform proves that the file system has effective performance. Furthermore, the flash file system can be transplanted to different embedded platforms by changing a few bottom hardware parameters with universality.
基金supported by the National Natural Science Foundation of China(No.62174150)the Natural Science Foundation of Jiangsu Province(No.BK20211040).
文摘To solve the Flash-based FPGA in the manufacturing process,the ion implantation process will bring electrons into the floating gate of the P-channel Flash cell so that the Flash switch is in a weak conduction state,resulting in the Flash-based FPGA eigenstate current problem.In this paper,the mechanism of its generation is analyzed,and four methods are used includ-ing ultraviolet light erasing,high-temperature baking,X-ray irradiation,and circuit logic control.A comparison of these four methods can identify the circuit design by using circuit logic to control the path of the power supply that is the most suitable and reliable method to solve the Flash-based FPGA eigenstate current problem.By this method,the power-on current of 3.5 mil-lion Flash-based FPGA can be reduced to less than 0.3 A,and the chip can start normally.The function and performance of the chip can then be further tested and evaluated,which is one of the key technologies for developing Flash-based FPGA.
