Emulation of LocalFileSystem with virtual COM.
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.
Import programlpcterm2
semihost server example program
SWSPI/SWSPI.cpp
- Committer:
- va009039
- Date:
- 2014-06-21
- Revision:
- 6:528036abfb02
- Parent:
- 0:39eb4d5b97df
File content as of revision 6:528036abfb02:
/* SWSPI, Software SPI library * Copyright (c) 2012-2014, David R. Van Wagner, http://techwithdave.blogspot.com * * Permission is hereby granted, free of charge, to any person obtaining a copy * of this software and associated documentation files (the "Software"), to deal * in the Software without restriction, including without limitation the rights * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell * copies of the Software, and to permit persons to whom the Software is * furnished to do so, subject to the following conditions: * * The above copyright notice and this permission notice shall be included in * all copies or substantial portions of the Software. * * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN * THE SOFTWARE. */ #include <mbed.h> #include "SWSPI.h" SWSPI::SWSPI(PinName mosi_pin, PinName miso_pin, PinName sclk_pin):_fast(false) { mosi = new DigitalOut(mosi_pin); miso = new DigitalIn(miso_pin); sclk = new DigitalOut(sclk_pin); format(8); frequency(); } SWSPI::~SWSPI() { delete mosi; delete miso; delete sclk; } void SWSPI::format(int bits, int mode) { this->bits = bits; this->mode = mode; polarity = (mode >> 1) & 1; phase = mode & 1; sclk->write(polarity); } void SWSPI::frequency(int hz) { this->freq = hz; _fast = (hz >= 1000000) ? true : false; } #pragma Otime int SWSPI::write(int value) { if (_fast) { return fast_write(value); } int read = 0; for (int bit = bits-1; bit >= 0; --bit) { mosi->write(((value >> bit) & 0x01) != 0); if (phase == 0) { if (miso->read()) read |= (1 << bit); } sclk->write(!polarity); wait_us(1000000/freq/2); if (phase == 1) { if (miso->read()) read |= (1 << bit); } sclk->write(polarity); wait_us(1000000/freq/2); } return read; } uint8_t SWSPI::fast_write(uint8_t value) { uint8_t data = 0; for(uint8_t mask = 0x80; mask; mask >>= 1) { mosi->write((value & mask) ? 1 : 0); if (miso->read()) { data |= mask; } sclk->write(1); sclk->write(0); } return data; }