M module low-level (LL) driver layer realization method for M module-based local area network (LAN)-based extensions for instrumentation (LXI) equipment

Abstract

The invention discloses an M module low-level (LL) driver layer realization method for M module-based local area network (LAN)-based extensions for instrumentation (LXI) equipment, which belongs to the field of automatic test and aims to solve the problem of independence between a conventional M module driver software architecture for the LXI equipment and hardware. In the method, an M module hardware interface control logic is realized by a field programmable gate array (FPGA); the LL driver layer driving of the M module software architecture is used for realizing an M module interface operating function; in the driving of a high-level (HL) driver layer, a function of an LL driver layer is called; a testing function related application layer repackages a function interface provided by the HL driver layer; a testing equipment related application layer realizes testing functions; the LL driver layer is divided into two architectures comprising a user model and a kernel model, the user model adopts a uClinux application program to perform FPGA setting and register configuration, and the kernel model adopts uClinum character driving to perform the setting of an advanced RISC machine (ARM) processor and the register configuration; and a system calls and interrupts corresponding functions of the user model and the kernel model.

Description

technical field [0001] The invention relates to a method for realizing an M module LL driver layer in an M module-based LXI device, belonging to the field of automatic testing. Background technique [0002] LXI devices are open standards built on proven and mature standards in many industrial-grade test domains. At present, the LXI equipment developed by me adopts the M module specification, which divides the instrument into two parts: the LXI interface carrier board and the functional unit, which greatly improves the standardization of the equipment in terms of mechanical structure, power supply, and hardware architecture. In terms of software, the software architecture of the M module controller is the focus of standardized LXI equipment design. [0003] The driver function is described in detail in the M interface specification (ANSI / VITA 12-1996) (see Appendix A of the M interface specification (Annex A: Driver software interface)). The specification recommends a two-t...

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Problems solved by technology

[0017] The purpose of the present invention is to solve the problem of irrelevance between the existing M module driver software architecture and hardware used for LXI equipment, and realize the separation of the M module LL driver program from the specific M module HL driver program, so that the M module LL driver program has good versatility

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