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

SWSPI/SWSPI.cpp@6:528036abfb02, 2014-06-21 (annotated)

Committer:
va009039
Date:
Sat Jun 21 22:39:59 2014 +0000
Revision:
6:528036abfb02
Parent:
0:39eb4d5b97df 
add LPC11U68

Who changed what in which revision?

UserRevisionLine numberNew contents of line
va009039 0:39eb4d5b97df 1 /* SWSPI, Software SPI library
va009039 0:39eb4d5b97df 2 * Copyright (c) 2012-2014, David R. Van Wagner, http://techwithdave.blogspot.com
va009039 0:39eb4d5b97df 3 *
va009039 0:39eb4d5b97df 4 * Permission is hereby granted, free of charge, to any person obtaining a copy
va009039 0:39eb4d5b97df 5 * of this software and associated documentation files (the "Software"), to deal
va009039 0:39eb4d5b97df 6 * in the Software without restriction, including without limitation the rights
va009039 0:39eb4d5b97df 7 * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
va009039 0:39eb4d5b97df 8 * copies of the Software, and to permit persons to whom the Software is
va009039 0:39eb4d5b97df 9 * furnished to do so, subject to the following conditions:
va009039 0:39eb4d5b97df 10 *
va009039 0:39eb4d5b97df 11 * The above copyright notice and this permission notice shall be included in
va009039 0:39eb4d5b97df 12 * all copies or substantial portions of the Software.
va009039 0:39eb4d5b97df 13 *
va009039 0:39eb4d5b97df 14 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
va009039 0:39eb4d5b97df 15 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
va009039 0:39eb4d5b97df 16 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
va009039 0:39eb4d5b97df 17 * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
va009039 0:39eb4d5b97df 18 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
va009039 0:39eb4d5b97df 19 * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
va009039 0:39eb4d5b97df 20 * THE SOFTWARE.
va009039 0:39eb4d5b97df 21 */
va009039 0:39eb4d5b97df 22
va009039 0:39eb4d5b97df 23 #include <mbed.h>
va009039 0:39eb4d5b97df 24 #include "SWSPI.h"
va009039 0:39eb4d5b97df 25
va009039 0:39eb4d5b97df 26 SWSPI::SWSPI(PinName mosi_pin, PinName miso_pin, PinName sclk_pin):_fast(false)
va009039 0:39eb4d5b97df 27 {
va009039 0:39eb4d5b97df 28 mosi = new DigitalOut(mosi_pin);
va009039 0:39eb4d5b97df 29 miso = new DigitalIn(miso_pin);
va009039 0:39eb4d5b97df 30 sclk = new DigitalOut(sclk_pin);
va009039 0:39eb4d5b97df 31 format(8);
va009039 0:39eb4d5b97df 32 frequency();
va009039 0:39eb4d5b97df 33 }
va009039 0:39eb4d5b97df 34
va009039 0:39eb4d5b97df 35 SWSPI::~SWSPI()
va009039 0:39eb4d5b97df 36 {
va009039 0:39eb4d5b97df 37 delete mosi;
va009039 0:39eb4d5b97df 38 delete miso;
va009039 0:39eb4d5b97df 39 delete sclk;
va009039 0:39eb4d5b97df 40 }
va009039 0:39eb4d5b97df 41
va009039 0:39eb4d5b97df 42 void SWSPI::format(int bits, int mode)
va009039 0:39eb4d5b97df 43 {
va009039 0:39eb4d5b97df 44 this->bits = bits;
va009039 0:39eb4d5b97df 45 this->mode = mode;
va009039 0:39eb4d5b97df 46 polarity = (mode >> 1) & 1;
va009039 0:39eb4d5b97df 47 phase = mode & 1;
va009039 0:39eb4d5b97df 48 sclk->write(polarity);
va009039 0:39eb4d5b97df 49 }
va009039 0:39eb4d5b97df 50
va009039 0:39eb4d5b97df 51 void SWSPI::frequency(int hz)
va009039 0:39eb4d5b97df 52 {
va009039 0:39eb4d5b97df 53 this->freq = hz;
va009039 0:39eb4d5b97df 54 _fast = (hz >= 1000000) ? true : false;
va009039 0:39eb4d5b97df 55 }
va009039 0:39eb4d5b97df 56
va009039 0:39eb4d5b97df 57 #pragma Otime
va009039 0:39eb4d5b97df 58
va009039 0:39eb4d5b97df 59 int SWSPI::write(int value)
va009039 0:39eb4d5b97df 60 {
va009039 0:39eb4d5b97df 61 if (_fast) {
va009039 0:39eb4d5b97df 62 return fast_write(value);
va009039 0:39eb4d5b97df 63 }
va009039 0:39eb4d5b97df 64 int read = 0;
va009039 0:39eb4d5b97df 65 for (int bit = bits-1; bit >= 0; --bit)
va009039 0:39eb4d5b97df 66 {
va009039 0:39eb4d5b97df 67 mosi->write(((value >> bit) & 0x01) != 0);
va009039 0:39eb4d5b97df 68
va009039 0:39eb4d5b97df 69 if (phase == 0)
va009039 0:39eb4d5b97df 70 {
va009039 0:39eb4d5b97df 71 if (miso->read())
va009039 0:39eb4d5b97df 72 read |= (1 << bit);
va009039 0:39eb4d5b97df 73 }
va009039 0:39eb4d5b97df 74
va009039 0:39eb4d5b97df 75 sclk->write(!polarity);
va009039 0:39eb4d5b97df 76
va009039 0:39eb4d5b97df 77 wait_us(1000000/freq/2);
va009039 0:39eb4d5b97df 78
va009039 0:39eb4d5b97df 79 if (phase == 1)
va009039 0:39eb4d5b97df 80 {
va009039 0:39eb4d5b97df 81 if (miso->read())
va009039 0:39eb4d5b97df 82 read |= (1 << bit);
va009039 0:39eb4d5b97df 83 }
va009039 0:39eb4d5b97df 84
va009039 0:39eb4d5b97df 85 sclk->write(polarity);
va009039 0:39eb4d5b97df 86
va009039 0:39eb4d5b97df 87 wait_us(1000000/freq/2);
va009039 0:39eb4d5b97df 88 }
va009039 0:39eb4d5b97df 89
va009039 0:39eb4d5b97df 90 return read;
va009039 0:39eb4d5b97df 91 }
va009039 0:39eb4d5b97df 92
va009039 0:39eb4d5b97df 93 uint8_t SWSPI::fast_write(uint8_t value)
va009039 0:39eb4d5b97df 94 {
va009039 0:39eb4d5b97df 95 uint8_t data = 0;
va009039 0:39eb4d5b97df 96 for(uint8_t mask = 0x80; mask; mask >>= 1) {
va009039 0:39eb4d5b97df 97 mosi->write((value & mask) ? 1 : 0);
va009039 0:39eb4d5b97df 98 if (miso->read()) {
va009039 0:39eb4d5b97df 99 data |= mask;
va009039 0:39eb4d5b97df 100 }
va009039 0:39eb4d5b97df 101 sclk->write(1);
va009039 0:39eb4d5b97df 102 sclk->write(0);
va009039 0:39eb4d5b97df 103 }
va009039 0:39eb4d5b97df 104 return data;
va009039 0:39eb4d5b97df 105 }
va009039 0:39eb4d5b97df 106