Renesas R8A66597, Руководство пользователя

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Renesas USB Device USB Host Mass Storage Class Driver(HMSC)
R01AN0513EJ0110 Rev.1.10 Page 37 of 55
Aug 10, 2011
Table 7.8 usb_hmsc_SmpDevReadPartition()
Name Read PBR Sector Information
Call format uint16_t usb_hmsc_SmpDevReadPartition(uint16_t unit, uint32_t trans_byte)
uint16_t unit
Unit number
Arguments
uint32_t trans_byte Transmit data length (sector count)
Return values uint16_t
USBC_DONE Drive detected
USBC_ERROR Drive not detected
Description Searches PBR the counts the total number of drives.
Notes
Table 7.9 usb_hmsc_SmpDevCheckBootRecord()
Name Determine Partition Type
Call format
uint16_t usb_hmsc_SmpDevCheckBootRecord(uint8_t *data, uint32_t *par_lba, uint8_t
*par_info , uint16_t flag)
uint8_t
*data Data address read
uint32_t *par_lba Partition block address
uint8_t *par_info Partition information
Arguments
uint16_t flag
Return values uint16_t
USBC_MBR_ADDR MBR detected
USBC_PBR_ADDR PBR detected
USBC_EMBR_ADDR Extended partition detected
USBC_BOOT_ERROR MBR/PBR not detected
USBC_ERROR
Other than boot record
Description
The data that is read is used to determine whether the partition type is PBR or MBR.
The determination covers all four partition types, and the block address is set.
When an extended partition exists, the type …
When the partition type cannot be identified, it is determined to be not MBR and is treated
as PBR for information checking. If it cannot be determined to be PBR,
USBC_BOOT_ERROR is returned.
Notes
Table 7.10 usb_hmsc_SmpFsiDriveClear()
Name Initialize Drive
Call format void usb_hmsc_SmpFsiDriveClear(uint16_t addr)
Arguments uint16_t addr Device address
Return values void
Description Initializes drives.
Notes All drives associated with the specified device are initialized.
Table 7.11 R_usb_hmsc_StrgDriveOpen()
Name Mount Drive
Call format uint16_t R_usb_hmsc_StrgDriveOpen(uint16_t side)
Arguments uint16_t side
Return values uint16_t
USBC_DONE Normal end
USBC_ERROR Error end
Description
Mounts the drive specified by the argument. (The sector information is initialized.)
Other than a common check, an error response occurs in the following cases.
When the partition number could not be found
When the drive information could not be read successfully from the storage device
Notes This function also supports extended partitions.