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Anchor10465141046514 Device Operations Anchor10465151046515The ultimate purpose of a file system device is to hold data. Consequently, two major operations that can occur on a device are the reading and writing of individual sectors. Five additional operations can be performed which affect not just individual sectors, but the whole device: Anchor10469651046965

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Anchor10465211046521These operations and the corresponding API functions are discussed in this section. For information about using device names, see section 4-2 “μC/FS Device and Volume Names” on page 61. Anchor10501011050101  

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Function

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Description

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FSDev_AccessLock()

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Acquire exclusive access to a device.

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FSDev_AccessUnlock()

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Release exclusive access to a device.

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FSDev_Close()

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Remove device from file system.

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FSDev_GetNbrPartitions()

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Get number of partitions on a device.

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FSDev_Invalidate()

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Invalidate files and volumes open on a device.

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FSDev_IO_Ctrl()

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Perform device I/O control operation.

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FSDev_Open()

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Add device to file system.

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FSDev_PartitionAdd()

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Add partition to device.

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FSDev_PartitionFind()

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Find partition on device and get information about partition.

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FSDev_PartitionInit()

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Initialize partition on device.

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FSDev_Query()

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Get device information.

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FSDev_Rd()

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Read sector on device.

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FSDev_Refresh()

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Refresh device in file system.

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FSDev_Wr()

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Write sector on device.

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Table 7-1 Device API functions