Norimasa Okamoto / USBLocalFileSystem

Emulation of LocalFileSystem with virtual COM.

Dependencies:   USBDevice

Dependents:   KL46Z-lpc81isp lpcterm2 

#include "USBLocalFileSystem.h"

int main() {
    USBLocalFileSystem* usb_local = new USBLocalFileSystem(); // RamDisk(64KB)

    while(1) {
        usb_local->lock(true);
        usb_local->remount();
        char filename[32];
        if (usb_local->find(filename, sizeof(filename), "*.TXT")) {
            FILE* fp = fopen(filename, "r");
            if (fp) {
                int c;
                while((c = fgetc(fp)) != EOF) {
                    usb_local->putc(c);
                }
                fclose(fp);
            }
        }    
        usb_local->lock(false);

        wait_ms(1000*5);
    }
}



Sample application：

Import programKL46Z-lpc81isp

ISP example program.

Last commit 04 May 2014 by Norimasa Okamoto

Import programlpcterm2

semihost server example program

Last commit 22 Jun 2014 by Norimasa Okamoto

src/RamDisk.cpp@0:39eb4d5b97df, 2014-05-03 (annotated)

Committer:
va009039
Date:
Sat May 03 11:21:37 2014 +0000
Revision:
0:39eb4d5b97df
Child:
2:97c314eae8b8
first commit

Who changed what in which revision?

UserRevisionLine numberNew contents of line
va009039 0:39eb4d5b97df 1 #include "RamDisk.h"
va009039 0:39eb4d5b97df 2
va009039 0:39eb4d5b97df 3 #if (DEBUG2 > 3)
va009039 0:39eb4d5b97df 4 #define RAMDISK_DBG(...) do{fprintf(stderr,"[%s@%d] ",__PRETTY_FUNCTION__,__LINE__);fprintf(stderr,__VA_ARGS__);fprintf(stderr,"\r\n");} while(0);
va009039 0:39eb4d5b97df 5 #else
va009039 0:39eb4d5b97df 6 #define RAMDISK_DBG(...)
va009039 0:39eb4d5b97df 7 #endif
va009039 0:39eb4d5b97df 8
va009039 0:39eb4d5b97df 9 RamDisk::RamDisk(int sectors):_sectors(sectors)
va009039 0:39eb4d5b97df 10 {
va009039 0:39eb4d5b97df 11 format();
va009039 0:39eb4d5b97df 12 }
va009039 0:39eb4d5b97df 13
va009039 0:39eb4d5b97df 14 /* virtual */ uint32_t RamDisk::storage_sectors()
va009039 0:39eb4d5b97df 15 {
va009039 0:39eb4d5b97df 16 return _sectors;
va009039 0:39eb4d5b97df 17 }
va009039 0:39eb4d5b97df 18
va009039 0:39eb4d5b97df 19 /* virtual */ uint32_t RamDisk::storage_size()
va009039 0:39eb4d5b97df 20 {
va009039 0:39eb4d5b97df 21 return _sectors * 512;
va009039 0:39eb4d5b97df 22 }
va009039 0:39eb4d5b97df 23
va009039 0:39eb4d5b97df 24 /* virtual */ int RamDisk::storage_read(uint8_t * data, uint32_t block)
va009039 0:39eb4d5b97df 25 {
va009039 0:39eb4d5b97df 26 RAMDISK_DBG("R block=%d", block);
va009039 0:39eb4d5b97df 27 update();
va009039 0:39eb4d5b97df 28 memset(data, 0x00, 512);
va009039 0:39eb4d5b97df 29 if (_sector_image.count(block) > 0) {
va009039 0:39eb4d5b97df 30 uint8_t* buf = _sector_image[block];
va009039 0:39eb4d5b97df 31 int size = buf[0]|(buf[1]<<8);
va009039 0:39eb4d5b97df 32 size &= 0x7fff; // remove ROM area bit
va009039 0:39eb4d5b97df 33 memcpy(data, buf + 2, size);
va009039 0:39eb4d5b97df 34 }
va009039 0:39eb4d5b97df 35 return 0;
va009039 0:39eb4d5b97df 36 }
va009039 0:39eb4d5b97df 37
va009039 0:39eb4d5b97df 38 static int block_size(const uint8_t* data)
va009039 0:39eb4d5b97df 39 {
va009039 0:39eb4d5b97df 40 for(int i = 512-1; i >= 0; i--) {
va009039 0:39eb4d5b97df 41 if (data[i] != 0x00) {
va009039 0:39eb4d5b97df 42 return i+1;
va009039 0:39eb4d5b97df 43 }
va009039 0:39eb4d5b97df 44 }
va009039 0:39eb4d5b97df 45 return 0;
va009039 0:39eb4d5b97df 46 }
va009039 0:39eb4d5b97df 47
va009039 0:39eb4d5b97df 48 /* virtual */ int RamDisk::storage_write(const uint8_t * data, uint32_t block)
va009039 0:39eb4d5b97df 49 {
va009039 0:39eb4d5b97df 50 update();
va009039 0:39eb4d5b97df 51 int size = block_size(data);
va009039 0:39eb4d5b97df 52 if (_sector_image.count(block) > 0) {
va009039 0:39eb4d5b97df 53 uint8_t* buf = _sector_image[block];
va009039 0:39eb4d5b97df 54 if (!(buf[1] & 0x80)) { // ROM area
va009039 0:39eb4d5b97df 55 free(buf);
va009039 0:39eb4d5b97df 56 }
va009039 0:39eb4d5b97df 57 buf = (uint8_t*)malloc(size + 2);
va009039 0:39eb4d5b97df 58 if (buf == NULL) {
va009039 0:39eb4d5b97df 59 RAMDISK_DBG("DISK FULL");
va009039 0:39eb4d5b97df 60 exit(1);
va009039 0:39eb4d5b97df 61 return 1;
va009039 0:39eb4d5b97df 62 }
va009039 0:39eb4d5b97df 63 _sector_image[block] = buf;
va009039 0:39eb4d5b97df 64 buf[0] = size;
va009039 0:39eb4d5b97df 65 buf[1] = size>>8;
va009039 0:39eb4d5b97df 66 memcpy(buf + 2, data, size);
va009039 0:39eb4d5b97df 67 RAMDISK_DBG("W block=%d size=%d", (int)block, size);
va009039 0:39eb4d5b97df 68 } else if (size > 0) {
va009039 0:39eb4d5b97df 69 uint8_t* buf = (uint8_t*)malloc(size + 2);
va009039 0:39eb4d5b97df 70 if (buf == NULL) {
va009039 0:39eb4d5b97df 71 RAMDISK_DBG("DISK FULL");
va009039 0:39eb4d5b97df 72 exit(1);
va009039 0:39eb4d5b97df 73 return 1;
va009039 0:39eb4d5b97df 74 }
va009039 0:39eb4d5b97df 75 _sector_image[block] = (uint8_t*)buf;
va009039 0:39eb4d5b97df 76 buf[0] = size;
va009039 0:39eb4d5b97df 77 buf[1] = size>>8;
va009039 0:39eb4d5b97df 78
va009039 0:39eb4d5b97df 79 memcpy(buf + 2, data, size);
va009039 0:39eb4d5b97df 80 RAMDISK_DBG("W block=%d size=%d NEW %d", (int)block, size, _sector_image.size());
va009039 0:39eb4d5b97df 81 } else {
va009039 0:39eb4d5b97df 82 RAMDISK_DBG("W block=%d BLANK", (int)block);
va009039 0:39eb4d5b97df 83 }
va009039 0:39eb4d5b97df 84 return 0;
va009039 0:39eb4d5b97df 85 }
va009039 0:39eb4d5b97df 86
va009039 0:39eb4d5b97df 87 void RamDisk::dump(int mode)
va009039 0:39eb4d5b97df 88 {
va009039 0:39eb4d5b97df 89 printf("static const uint8_t block_image[] = { // %d blocks\n", _sector_image.size());
va009039 0:39eb4d5b97df 90 for(int i = 0; i < _sector_image.size(); i++) {
va009039 0:39eb4d5b97df 91 int block = _sector_image.getKey(i);
va009039 0:39eb4d5b97df 92 uint8_t* buf = _sector_image[block];
va009039 0:39eb4d5b97df 93 int size = buf[0]|(buf[1]<<8);
va009039 0:39eb4d5b97df 94 size &= 0x7fff;
va009039 0:39eb4d5b97df 95 printf("0x%02x,0x%02x,0x%02x|0x80, // block=%d, size=%d, ROM area\n",
va009039 0:39eb4d5b97df 96 block, buf[0], buf[1], block, size);
va009039 0:39eb4d5b97df 97 if (mode == 1) {
va009039 0:39eb4d5b97df 98 for(int j = 0; j < size; j++) {
va009039 0:39eb4d5b97df 99 printf("0x%02x,", buf[j+2]);
va009039 0:39eb4d5b97df 100 if ((j % 16) == 15 || j == size-1) {
va009039 0:39eb4d5b97df 101 printf("\n");
va009039 0:39eb4d5b97df 102 }
va009039 0:39eb4d5b97df 103 }
va009039 0:39eb4d5b97df 104 }
va009039 0:39eb4d5b97df 105 }
va009039 0:39eb4d5b97df 106 printf("0xff};\n");
va009039 0:39eb4d5b97df 107 }
va009039 0:39eb4d5b97df 108