Diff: USBDevice/USBMSD/USBMSD.h

Revision:

2:27a7e7f8d399

Child:

3:0ffb2eee9e06

--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/USBDevice/USBMSD/USBMSD.h	Fri Nov 11 15:22:53 2011 +0000
@@ -0,0 +1,189 @@
+/* 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
+