為了滿足航空電子系統(tǒng)對確定性和實時性的要求，針對AFDX端系統(tǒng)硬件結(jié)構(gòu)，功能需求和Linux驅(qū)動程序的特點，提出了一種滿足AFDX協(xié)議的Linux內(nèi)核態(tài)驅(qū)動程序的實現(xiàn)方法。在Linux內(nèi)核態(tài)驅(qū)動程序的實現(xiàn)中先注冊一個PCI總線驅(qū)動程序，然后在PCI總線驅(qū)動程序中注冊字符型設(shè)備驅(qū)動程序。字符型設(shè)備驅(qū)動程序注冊成功后，在其open()函數(shù)中注冊中斷處理程序，利用其ioctl()函數(shù)實現(xiàn)初始化表和端口，利用read()和write()函數(shù)來讀寫設(shè)備。測試結(jié)果顯示，該Linux內(nèi)核態(tài)驅(qū)動程序的設(shè)計和實現(xiàn)是可以滿足航空電子系統(tǒng)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 .