Diff: CHAN_FS/diskio.c

Branch:

Metric

Revision:

109:3e6f0e8fca0d

--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/CHAN_FS/diskio.c	Sun Jun 30 17:52:58 2013 +0000
@@ -0,0 +1,180 @@
+/*-----------------------------------------------------------------------*/
+/* Low level disk I/O module skeleton for FatFs     (C)ChaN, 2007        */
+/*-----------------------------------------------------------------------*/
+/* This is a stub disk I/O module that acts as front end of the existing */
+/* disk I/O modules and attach it to FatFs module with common interface. */
+/*-----------------------------------------------------------------------*/
+
+#include "diskio.h"
+#include "usbhost_inc.h"
+#include "mbed.h"
+
+uint32_t _numBlks = 0;
+uint32_t _blkSize = 512;
+
+int initialise_msc();
+void print_inquiry(USB_INT08U *inqReply);
+
+
+int disk_sync() { return 0; }
+int disk_sectors() { return _numBlks; }
+
+DWORD get_fattime(void)
+{
+    time_t CurrentTimeStamp;
+    tm *CurrentLocalTime;
+    DWORD FATFSTimeCode;
+        
+    CurrentTimeStamp = time(NULL);
+    CurrentLocalTime = localtime(&CurrentTimeStamp);
+        
+        //Map the tm struct time into the FatFs time code    
+    FATFSTimeCode =  ((CurrentLocalTime->tm_year-80)<<25) | 
+                     ((CurrentLocalTime->tm_mon+1)<<21)   | 
+                     ((CurrentLocalTime->tm_mday)<<16)    | 
+                     ((CurrentLocalTime->tm_hour)<<11)    |
+                     ((CurrentLocalTime->tm_min)<<5)     | 
+                     ((CurrentLocalTime->tm_sec));
+
+   return FATFSTimeCode;
+}
+
+DSTATUS disk_status(BYTE Drive)
+{
+    return 0;
+}
+
+    
+DRESULT disk_ioctl (
+    BYTE drv,        /* Physical drive nmuber (0..) */
+    BYTE ctrl,        /* Control code */
+    void *buff        /* Buffer to send/receive control data */
+)
+{
+    DRESULT res;
+
+    switch(ctrl)
+    {
+        case CTRL_SYNC:
+             res = RES_OK;
+        break;
+    
+        case GET_SECTOR_SIZE:
+              res = RES_OK;
+            *(WORD *)buff = 512;
+        break;
+        
+        case GET_SECTOR_COUNT:
+            res = RES_OK;
+           *(DWORD *)buff = (WORD)disk_sectors();
+        break;
+        
+        case GET_BLOCK_SIZE:
+         res = RES_OK;
+          *(DWORD *)buff = 1;
+        break;
+        
+        default:
+        res = RES_OK;
+        break;
+    }
+    return res;
+}
+
+DSTATUS disk_initialize(BYTE Drive) {
+
+    if ( initialise_msc() != OK )
+        return 1;
+    return 0;
+}
+
+DRESULT disk_write(BYTE Drive,const BYTE * Buffer, DWORD SectorNumber, BYTE SectorCount)
+{
+   if ( OK == MS_BulkSend(SectorNumber, SectorCount, (USB_INT08U *)Buffer) )
+        return RES_OK;
+    return RES_ERROR;    
+}
+
+DRESULT disk_read(BYTE Drive, BYTE * Buffer,DWORD SectorNumber, BYTE SectorCount)
+{        
+    if ( OK == MS_BulkRecv(SectorNumber, SectorCount, (USB_INT08U *)Buffer) )
+        return RES_OK;
+    return RES_ERROR;
+}
+
+
+
+
+
+void print_inquiry(USB_INT08U *inqReply)
+{
+    // see USB Mass Storage Class &#65533; UFI Command Specification,
+    // 4.2 INQUIRY Command
+    printf("Inquiry reply:\n"); 
+    uint8_t tmp = inqReply[0]&0x1F;
+    printf("Peripheral device type: %02Xh\n", tmp);
+    if ( tmp == 0 )
+        printf("\t- Direct access (floppy)\n");
+    else if ( tmp == 0x1F )
+        printf("\t- none (no FDD connected)\n");
+    else
+        printf("\t- unknown type\n");
+    tmp = inqReply[1] >> 7;
+    printf("Removable Media Bit: %d\n", tmp);
+    tmp = inqReply[2] & 3;
+    printf("ANSI Version: %02Xh\n", tmp);
+    if ( tmp != 0 )
+        printf("\t- warning! must be 0\n");
+    tmp = (inqReply[2]>>3) & 3;
+    printf("ECMA Version: %02Xh\n", tmp);
+    if ( tmp != 0 )
+        printf("\t- warning! should be 0\n");
+    tmp = inqReply[2]>>6;
+    printf("ISO Version: %02Xh\n", tmp);
+    if ( tmp != 0 )
+        printf("\t- warning! should be 0\n");
+    tmp = inqReply[3] & 0xF;
+    printf("Response Data Format: %02Xh\n", tmp);
+    if ( tmp != 1 )
+        printf("\t- warning! should be 1\n");
+    tmp = inqReply[4];
+    printf("Additional length: %02Xh\n", tmp);
+    if ( tmp != 0x1F )
+        printf("\t- warning! should be 1Fh\n");
+    printf("Vendor Information: '%.8s'\n", &inqReply[8]);
+    printf("Product Identification: '%.16s'\n", &inqReply[16]);
+    printf("Product Revision: '%.4s'\n", &inqReply[32]);        
+}
+
+
+
+int initialise_msc()
+{
+    USB_INT32S  rc;
+    USB_INT08U  inquiryResult[INQUIRY_LENGTH];
+    
+    //print_clock();
+    Host_Init();               /* Initialize the  host controller                                    */
+    rc = Host_EnumDev();       /* Enumerate the device connected                                            */
+    if (rc != OK)
+    {
+        fprintf(stderr, "Could not enumerate device: %d\n", rc);
+        return rc;
+    }
+        
+    
+    /* Initialize the mass storage and scsi interfaces */
+    rc = MS_Init( &_blkSize, &_numBlks, inquiryResult );
+    if (rc != OK)
+    {
+        fprintf(stderr, "Could not initialize mass storage interface: %d\n", rc);
+        return rc;
+    }
+    printf("Successfully initialized mass storage interface; %d blocks of size %d\n", _numBlks, _blkSize);
+    print_inquiry(inquiryResult);
+    // FATFileSystem supports only 512-byte blocks
+    return _blkSize == 512 ? OK : 1;
+}
+
+
+