Specifically, the fx_media_driver_request member of FX_MEDIA is used to specify the exact driver request. I/O Driver Requestsīecause each I/O driver has a single entry function, FileX makes specific requests through the media control block.
Requests made to the driver are done sequentially i.e., FileX waits for the current request to complete before another request is sent. The driver entry function has the following format: void my_driver_entry(FX_MEDIA *media_ptr) įileX calls the I/O driver entry function to request all physical media access, including initialization and boot sector reading. I/O Driver EntryĮach FileX I/O driver has a single entry function that is defined by the fx_media_open service call. In most systems, there is a unique I/O driver for each FileX media instance. This structure contains all media information, including the media-specific I/O driver and associated parameters for passing information and status between the driver and FileX. The FX_MEDIA structure defines everything required to manage a media device. I/O Driver IntroductionįileX supports multiple media devices. This chapter contains a description of I/O drivers for Azure RTOS FileX and is designed to help developers write application-specific drivers.
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