120 lines
3.1 KiB
C
120 lines
3.1 KiB
C
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/* mbed USBHost Library
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* Copyright (c) 2006-2013 ARM Limited
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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#ifndef USBHOSTMSD_H
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#define USBHOSTMSD_H
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#include "USBHostConf.h"
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#if USBHOST_MSD
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#include "USBHost.h"
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#include "FATFileSystem.h"
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/**
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* A class to communicate a USB flash disk
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*/
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class USBHostMSD : public IUSBEnumerator, public FATFileSystem {
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public:
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/**
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* Constructor
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*
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* @param rootdir mount name
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*/
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USBHostMSD(const char * rootdir);
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/**
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* Check if a MSD device is connected
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*
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* @return true if a MSD device is connected
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*/
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bool connected();
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/**
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* Try to connect to a MSD device
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*
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* @return true if connection was successful
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*/
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bool connect();
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protected:
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//From IUSBEnumerator
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virtual void setVidPid(uint16_t vid, uint16_t pid);
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virtual bool parseInterface(uint8_t intf_nb, uint8_t intf_class, uint8_t intf_subclass, uint8_t intf_protocol); //Must return true if the interface should be parsed
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virtual bool useEndpoint(uint8_t intf_nb, ENDPOINT_TYPE type, ENDPOINT_DIRECTION dir); //Must return true if the endpoint will be used
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// From FATFileSystem
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virtual int disk_initialize();
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virtual int disk_status() {return 0;};
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virtual int disk_read(uint8_t* buffer, uint64_t sector, uint8_t count);
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virtual int disk_write(const uint8_t* buffer, uint64_t sector, uint8_t count);
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virtual int disk_sync() {return 0;};
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virtual uint64_t disk_sectors();
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private:
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USBHost * host;
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USBDeviceConnected * dev;
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bool dev_connected;
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USBEndpoint * bulk_in;
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USBEndpoint * bulk_out;
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uint8_t nb_ep;
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// Bulk-only CBW
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typedef struct {
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uint32_t Signature;
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uint32_t Tag;
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uint32_t DataLength;
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uint8_t Flags;
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uint8_t LUN;
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uint8_t CBLength;
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uint8_t CB[16];
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} PACKED CBW;
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// Bulk-only CSW
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typedef struct {
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uint32_t Signature;
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uint32_t Tag;
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uint32_t DataResidue;
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uint8_t Status;
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} PACKED CSW;
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CBW cbw;
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CSW csw;
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int SCSITransfer(uint8_t * cmd, uint8_t cmd_len, int flags, uint8_t * data, uint32_t transfer_len);
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int testUnitReady();
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int readCapacity();
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int inquiry(uint8_t lun, uint8_t page_code);
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int SCSIRequestSense();
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int dataTransfer(uint8_t * buf, uint32_t block, uint8_t nbBlock, int direction);
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int checkResult(uint8_t res, USBEndpoint * ep);
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int getMaxLun();
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int blockSize;
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uint64_t blockCount;
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int msd_intf;
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bool msd_device_found;
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bool disk_init;
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void init();
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};
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#endif
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#endif
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