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Porting MSC to a RTOS
Function Name
USBD_StorageInit()
USBD_StorageCapacityGet()
USBD_StorageRd()
Operation
Initializes the storage medium.
Gets the capacity of the storage medium
Reads data from the storage medium
USBD_StorageWr()
USBD_StorageStatusGet()
Writes data to the storage medium
Gets the status of the storage medium. If the storage medium is a removable
device such as an SD/MMC card, this function will return if the storage is
inserted or removed.
Table 10-10 Storage API Functions
10
10-7 PORTING MSC TO A RTOS
The RTOS layer must implement the API functions listed in Table 10-11. You can start by
referencing the RTOS port template located under:
Micrium\Software\uC-USB-Device-V4\Class\MSC\OS\Template
Please refer to section E-2 “MSC OS Functions” on page 428 for a full API description.
Function
USBD_MSC_OS_Init()
USBD_MSC_OS_CommSignalPost()
USBD_MSC_OS_CommSignalPend()
USBD_MSC_OS_CommSignalDel()
USBD_MSC_OS_EnumSignalPost()
USBD_MSC_OS_EnumSignalPend()
Operation
Initializes MSC OS interface. This function will create both signals
(semaphores) for communication and enumeration processes. Furthermore,
this function will create the MSC task used for the MSC protocol.
Posts a semaphore used for MSC communication,
Waits on a semaphore to become available for MSC communication.
Deletes a semaphore if no tasks are waiting for it for MSC communication.
Posts a semaphore used for MSC enumeration process.
Waits for a semaphore to become available for MSC enumeration process.
Table 10-11 RTOS API Functions
181
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