USBMSD SD card Hello World for Mbed platforms
Dependencies: mbed USBMSD_SD USBDevice
USBDevice/USBMSD/USBMSD.h
- Committer:
- samux
- Date:
- 2011-11-11
- Revision:
- 2:27a7e7f8d399
- Child:
- 3:0ffb2eee9e06
File content as of revision 2:27a7e7f8d399:
/* USBMSD.h */ /* USB mass storage device example */ /* Copyright (c) 2011 ARM Limited. All rights reserved. */ /* * Guide to adapt this class to your storage chip: * * - adapt the BlockSize symbol in USBMSD.h * - adapt the MemorySize symbol in USBMSD.cpp * - declare your own object to store data: here AT45 mem * - Be sure to provide : * - mem.blockread(page, block_number); * - mem.blockwrite(page, block_number); * These functions are used by USBMSD class to read or write data */ #ifndef USBMSD_H #define USBMSD_H /* These headers are included for child class. */ #include "USBEndpoints.h" #include "USBDescriptor.h" #include "USBDevice_Types.h" #include "USBDevice.h" #include "SDcard.h" #define DEFAULT_CONFIGURATION (1) // Block Size #define BlockSize 512 // MSC Bulk-only Stage enum Stage { STATE_READ_CBW, // wait a CBW STATE_PROCESS_CBW, // process a CBW request STATE_SEND_CSW, // send a CSW STATE_ERROR, // error: out of memory STATE_WAIT_CSW, // wait that a CSW has been effectively sent }; // Bulk-only CBW typedef __packed struct { uint32_t Signature; uint32_t Tag; uint32_t DataLength; uint8_t Flags; uint8_t LUN; uint8_t CBLength; uint8_t CB[16]; } CBW; // Bulk-only CSW typedef __packed struct { uint32_t Signature; uint32_t Tag; uint32_t DataResidue; uint8_t Status; } CSW; /** * USBMSD example * * @code * #include "mbed.h" * #include "USBMSD.h" * * USBMSD msd; * * int main() { * while(1); * } * * @endcode */ class USBMSD: public USBDevice { public: /** * Constructor * * @param vendor_id Your vendor_id * @param product_id Your product_id * @param product_release Your preoduct_release */ USBMSD(uint16_t vendor_id = 0x0703, uint16_t product_id = 0x0104, uint16_t product_release = 0x0001); protected: /* * Get number of logical unit - 1 (here 0) * * @returns Pointer containing the number of logical unit - 1 */ uint8_t * getMaxLUN(); /* * Get string product descriptor * * @returns pointer to the string product descriptor */ virtual uint8_t * stringIproductDesc(); /* * Get string interface descriptor * * @returns pointer to the string interface descriptor */ virtual uint8_t * stringIinterfaceDesc(); /* * Get configuration descriptor * * @returns pointer to the configuration descriptor */ virtual uint8_t * configurationDesc(); /* * Callback called when a packet is received */ virtual bool EP2_OUT_callback(); /* * Callback called when a packet has been sent */ virtual bool EP2_IN_callback(); /* * Set configuration of device. Add endpoints */ virtual bool USBCallback_setConfiguration(uint8_t configuration); /* * Callback called to process class specific requests */ virtual bool USBCallback_request(); private: //state of the bulk-only state machine Stage stage; // current CBW CBW cbw; // CSW which will be sent CSW csw; // addr where will be read or written data uint32_t addr; // length of a reading or writing uint32_t length; // memory OK (after a memoryVerify) bool memOK; // cache in RAM before writing in memory. Useful also to read a block. uint8_t page[BlockSize]; // memory (Atmel AT45 family) // // You can change this memory to use another one (SDcard, ...) // You need to provide : // - mem.blockread(page, block_number); // - mem.blockwrite(page, block_number); SDcard mem; void CBWDecode(uint8_t * buf, uint16_t size); void sendCSW (void); bool inquiryRequest (void); bool write (uint8_t * buf, uint16_t size); bool readFormatCapacity(); bool readCapacity (void); bool infoTransfer (void); void memoryRead (void); bool modeSense6 (void); void testUnitReady (void); bool requestSense (void); void memoryVerify (uint8_t * buf, uint16_t size); void memoryWrite (uint8_t * buf, uint16_t size); void reset(); void fail(); }; #endif