為了滿足航空電子系統對確定性和實時性的要求，針對AFDX端系統硬件結構，功能需求和Linux驅動程序的特點，提出了一種滿足AFDX協議的Linux內核態驅動程序的實現方法。在Linux內核態驅動程序的實現中先注冊一個PCI總線驅動程序，然后在PCI總線驅動程序中注冊字符型設備驅動程序。字符型設備驅動程序注冊成功后，在其open()函數中注冊中斷處理程序，利用其ioctl()函數實現初始化表和端口，利用read()和write()函數來讀寫設備。測試結果顯示，該Linux內核態驅動程序的設計和實現是可以滿足航空電子系統對確定性和實時性的要求的。

　　Abstract:

　　In order to meet the aviation electronic systems for deterministic and real-time requirements， for the AFDX end system’s the hardware architecture， functional requirements and the Linux kernel mode driver characteristics， this paper proposed an approach that met the AFDX protocol to implement the AFDX end system’s function. The first step to implement the Linux driver was to register a PCI bus driver， then used the PCI bus driver to register a character device driver. After the character device driver registration was successful， used its open () function to register interrupt handler， used the ioctl () function to achieve initialization table and port， used its read () and write () function to read and write device. Test results show that the design and implementation of Linux kernel mode driver can meet the deterministic and real-time requirements of air electronic systems .