Temperature Data Logger or Display. Program uses the EA LPCXpresso Board's on-board temp sensor and SD card to constantly monitor the temperature. Optionally, the temp can be displayed on the EA OLED display.
Dependencies: mbed SDFileSystem
Revision 0:e05fd3c9c4b3, committed 2010-06-15
- Comitter:
- tyger23
- Date:
- Tue Jun 15 20:21:07 2010 +0000
- Child:
- 1:37f2341e763b
- Commit message:
Changed in this revision
--- /dev/null Thu Jan 01 00:00:00 1970 +0000 +++ b/EAOLED.cpp Tue Jun 15 20:21:07 2010 +0000 @@ -0,0 +1,121 @@ +/* mbed Embedded Artists OLED library, as found on the LPCXpresso Baseboard + * Copyright (c) 2010, sford + * + * 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 "EAOLED.h" +#include "mbed.h" + +EAOLED::EAOLED(PinName mosi, PinName dnc, PinName sclk, PinName cs, PinName power) + : _spi(mosi, NC, sclk), _data(dnc), _cs(cs), _power(power) { + reset(); +} + +void EAOLED::command(int value) { + _data = 0; + _cs = 0; + _spi.write(value); + _cs = 1; +} + +void EAOLED::data(int value) { + _data = 1; + _cs = 0; + _spi.write(value); + _cs = 1; +} + +void EAOLED::reset() { + _power = 0; + _cs = 1; + + // Startup sequence recommended by embedded artists baseboard reference code + command(0x02); // set low column address + command(0x12); // set high column address + command(0x40); // display start set + command(0x2e); // stop horzontal scroll + command(0x81); // set contrast control register + command(0x32); // + command(0x82); // brightness for color banks + command(0x80); // display on + command(0xa1); // set segment re-map + command(0xa6); // set normal/inverse display + command(0xa8); // set multiplex ratio + command(0x3F); // + command(0xd3); // set display offset + command(0x40); // + command(0xad); // set dc-dc on/off + command(0x8E); // + command(0xc8); // set com output scan direction + command(0xd5); // set display clock divide ratio/oscillator/frequency + command(0xf0); // + command(0xd8); // set area color mode on/off & low power display mode + command(0x05); // + command(0xd9); // set pre-charge period + command(0xF1); // + command(0xda); // set com pins hardware configuration + command(0x12); // + command(0xdb); // set vcom deselect level + command(0x34); // + command(0x91); // set look up table for area color + command(0x3f); // + command(0x3f); // + command(0x3f); // + command(0x3f); // + command(0xaf); // display on + command(0xa4); // display on + + wait_us(10); + + _power = 1; +} + +#define OLED_DISPLAY_WIDTH 96 +#define OLED_DISPLAY_HEIGHT 64 + +void EAOLED::pixel(int x, int y, int colour) { + int page = y >> 3; + int address = 18 + x; + + int lo = (address >> 0) & 0x0F; + int hi = (address >> 4) | 0x10; + int mask = 1 << (y & 0x7); + int byte = page * OLED_DISPLAY_WIDTH + x; + + if(colour) { + framebuffer[byte] |= mask; + } else { + framebuffer[byte] &= ~mask; + } + + command(0xB0 + page); + command(lo); + command(hi); + data(framebuffer[byte]); +} + +/*void EAOLED::cls() { + for(int y=0; y<64; y++) { + for (int x=0; x<96; x++) { + pixel(x, y, 0xFFFFFF); + } + } +}*/ +
--- /dev/null Thu Jan 01 00:00:00 1970 +0000 +++ b/EAOLED.h Tue Jun 15 20:21:07 2010 +0000 @@ -0,0 +1,49 @@ +/* mbed Embedded Artists OLED library, as found on the LPCXpresso Baseboard + * Copyright (c) 2010, sford + * + * 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. + */ + +#ifndef MBED_EAOLED_H +#define MBED_EAOLED_H + +#include "mbed.h" +#include "GraphicsDisplay.h" + +class EAOLED : public GraphicsDisplay { +public: + EAOLED(PinName mosi, PinName dnc, PinName sclk, PinName cs, PinName power); + virtual void pixel(int x, int y, int colour); + // virtual void cls(); + virtual int width() { return 96; } + virtual int height() { return 64; } + + void reset(); + void data(int value); + void command(int value); + + SPI _spi; + DigitalOut _data; + DigitalOut _cs; + DigitalOut _power; + + uint8_t framebuffer[(96 * 64) / 8]; +}; + +#endif
--- /dev/null Thu Jan 01 00:00:00 1970 +0000 +++ b/FATFileSystem.lib Tue Jun 15 20:21:07 2010 +0000 @@ -0,0 +1,1 @@ +http://mbed.org/users/mbed_unsupported/code/fatfilesystem/ \ No newline at end of file
--- /dev/null Thu Jan 01 00:00:00 1970 +0000 +++ b/GraphicsDisplay.cpp Tue Jun 15 20:21:07 2010 +0000 @@ -0,0 +1,175 @@ +/* mbed GraphicsDisplay Display Library Base Class + * Copyright (c) 2007-2009 sford + * Released under the MIT License: http://mbed.org/license/mit + */ + +#include "GraphicsDisplay.h" + +const unsigned char FONT8x8[97][8] = { +0x08,0x08,0x08,0x00,0x00,0x00,0x00,0x00, // columns, rows, num_bytes_per_char +0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00, // space 0x20 +0x30,0x78,0x78,0x30,0x30,0x00,0x30,0x00, // ! +0x6C,0x6C,0x6C,0x00,0x00,0x00,0x00,0x00, // " +0x6C,0x6C,0xFE,0x6C,0xFE,0x6C,0x6C,0x00, // # +0x18,0x3E,0x60,0x3C,0x06,0x7C,0x18,0x00, // $ +0x00,0x63,0x66,0x0C,0x18,0x33,0x63,0x00, // % +0x1C,0x36,0x1C,0x3B,0x6E,0x66,0x3B,0x00, // & +0x30,0x30,0x60,0x00,0x00,0x00,0x00,0x00, // ' +0x0C,0x18,0x30,0x30,0x30,0x18,0x0C,0x00, // ( +0x30,0x18,0x0C,0x0C,0x0C,0x18,0x30,0x00, // ) +0x00,0x66,0x3C,0xFF,0x3C,0x66,0x00,0x00, // * +0x00,0x30,0x30,0xFC,0x30,0x30,0x00,0x00, // + +0x00,0x00,0x00,0x00,0x00,0x18,0x18,0x30, // , +0x00,0x00,0x00,0x7E,0x00,0x00,0x00,0x00, // - +0x00,0x00,0x00,0x00,0x00,0x18,0x18,0x00, // . +0x03,0x06,0x0C,0x18,0x30,0x60,0x40,0x00, // / (forward slash) +0x3E,0x63,0x63,0x6B,0x63,0x63,0x3E,0x00, // 0 0x30 +0x18,0x38,0x58,0x18,0x18,0x18,0x7E,0x00, // 1 +0x3C,0x66,0x06,0x1C,0x30,0x66,0x7E,0x00, // 2 +0x3C,0x66,0x06,0x1C,0x06,0x66,0x3C,0x00, // 3 +0x0E,0x1E,0x36,0x66,0x7F,0x06,0x0F,0x00, // 4 +0x7E,0x60,0x7C,0x06,0x06,0x66,0x3C,0x00, // 5 +0x1C,0x30,0x60,0x7C,0x66,0x66,0x3C,0x00, // 6 +0x7E,0x66,0x06,0x0C,0x18,0x18,0x18,0x00, // 7 +0x3C,0x66,0x66,0x3C,0x66,0x66,0x3C,0x00, // 8 +0x3C,0x66,0x66,0x3E,0x06,0x0C,0x38,0x00, // 9 +0x00,0x18,0x18,0x00,0x00,0x18,0x18,0x00, // : +0x00,0x18,0x18,0x00,0x00,0x18,0x18,0x30, // ; +0x0C,0x18,0x30,0x60,0x30,0x18,0x0C,0x00, // < +0x00,0x00,0x7E,0x00,0x00,0x7E,0x00,0x00, // = +0x30,0x18,0x0C,0x06,0x0C,0x18,0x30,0x00, // > +0x3C,0x66,0x06,0x0C,0x18,0x00,0x18,0x00, // ? +0x3E,0x63,0x6F,0x69,0x6F,0x60,0x3E,0x00, // @ 0x40 +0x18,0x3C,0x66,0x66,0x7E,0x66,0x66,0x00, // A +0x7E,0x33,0x33,0x3E,0x33,0x33,0x7E,0x00, // B +0x1E,0x33,0x60,0x60,0x60,0x33,0x1E,0x00, // C +0x7C,0x36,0x33,0x33,0x33,0x36,0x7C,0x00, // D +0x7F,0x31,0x34,0x3C,0x34,0x31,0x7F,0x00, // E +0x7F,0x31,0x34,0x3C,0x34,0x30,0x78,0x00, // F +0x1E,0x33,0x60,0x60,0x67,0x33,0x1F,0x00, // G +0x66,0x66,0x66,0x7E,0x66,0x66,0x66,0x00, // H +0x3C,0x18,0x18,0x18,0x18,0x18,0x3C,0x00, // I +0x0F,0x06,0x06,0x06,0x66,0x66,0x3C,0x00, // J +0x73,0x33,0x36,0x3C,0x36,0x33,0x73,0x00, // K +0x78,0x30,0x30,0x30,0x31,0x33,0x7F,0x00, // L +0x63,0x77,0x7F,0x7F,0x6B,0x63,0x63,0x00, // M +0x63,0x73,0x7B,0x6F,0x67,0x63,0x63,0x00, // N +0x3E,0x63,0x63,0x63,0x63,0x63,0x3E,0x00, // O +0x7E,0x33,0x33,0x3E,0x30,0x30,0x78,0x00, // P 0x50 +0x3C,0x66,0x66,0x66,0x6E,0x3C,0x0E,0x00, // Q +0x7E,0x33,0x33,0x3E,0x36,0x33,0x73,0x00, // R +0x3C,0x66,0x30,0x18,0x0C,0x66,0x3C,0x00, // S +0x7E,0x5A,0x18,0x18,0x18,0x18,0x3C,0x00, // T +0x66,0x66,0x66,0x66,0x66,0x66,0x7E,0x00, // U +0x66,0x66,0x66,0x66,0x66,0x3C,0x18,0x00, // V +0x63,0x63,0x63,0x6B,0x7F,0x77,0x63,0x00, // W +0x63,0x63,0x36,0x1C,0x1C,0x36,0x63,0x00, // X +0x66,0x66,0x66,0x3C,0x18,0x18,0x3C,0x00, // Y +0x7F,0x63,0x46,0x0C,0x19,0x33,0x7F,0x00, // Z +0x3C,0x30,0x30,0x30,0x30,0x30,0x3C,0x00, // [ +0x60,0x30,0x18,0x0C,0x06,0x03,0x01,0x00, // \ (back slash) +0x3C,0x0C,0x0C,0x0C,0x0C,0x0C,0x3C,0x00, // ] +0x08,0x1C,0x36,0x63,0x00,0x00,0x00,0x00, // ^ +0x00,0x00,0x00,0x00,0x00,0x00,0x00,0xFF, // _ +0x18,0x18,0x0C,0x00,0x00,0x00,0x00,0x00, // ` 0x60 +0x00,0x00,0x3C,0x06,0x3E,0x66,0x3B,0x00, // a +0x70,0x30,0x3E,0x33,0x33,0x33,0x6E,0x00, // b +0x00,0x00,0x3C,0x66,0x60,0x66,0x3C,0x00, // c +0x0E,0x06,0x3E,0x66,0x66,0x66,0x3B,0x00, // d +0x00,0x00,0x3C,0x66,0x7E,0x60,0x3C,0x00, // e +0x1C,0x36,0x30,0x78,0x30,0x30,0x78,0x00, // f +0x00,0x00,0x3B,0x66,0x66,0x3E,0x06,0x7C, // g +0x70,0x30,0x36,0x3B,0x33,0x33,0x73,0x00, // h +0x18,0x00,0x38,0x18,0x18,0x18,0x3C,0x00, // i +0x06,0x00,0x06,0x06,0x06,0x66,0x66,0x3C, // j +0x70,0x30,0x33,0x36,0x3C,0x36,0x73,0x00, // k +0x38,0x18,0x18,0x18,0x18,0x18,0x3C,0x00, // l +0x00,0x00,0x66,0x7F,0x7F,0x6B,0x63,0x00, // m +0x00,0x00,0x7C,0x66,0x66,0x66,0x66,0x00, // n +0x00,0x00,0x3C,0x66,0x66,0x66,0x3C,0x00, // o +0x00,0x00,0x6E,0x33,0x33,0x3E,0x30,0x78, // p +0x00,0x00,0x3B,0x66,0x66,0x3E,0x06,0x0F, // q +0x00,0x00,0x6E,0x3B,0x33,0x30,0x78,0x00, // r +0x00,0x00,0x3E,0x60,0x3C,0x06,0x7C,0x00, // s +0x08,0x18,0x3E,0x18,0x18,0x1A,0x0C,0x00, // t +0x00,0x00,0x66,0x66,0x66,0x66,0x3B,0x00, // u +0x00,0x00,0x66,0x66,0x66,0x3C,0x18,0x00, // v +0x00,0x00,0x63,0x6B,0x7F,0x7F,0x36,0x00, // w +0x00,0x00,0x63,0x36,0x1C,0x36,0x63,0x00, // x +0x00,0x00,0x66,0x66,0x66,0x3E,0x06,0x7C, // y +0x00,0x00,0x7E,0x4C,0x18,0x32,0x7E,0x00, // z +0x0E,0x18,0x18,0x70,0x18,0x18,0x0E,0x00, // { +0x0C,0x0C,0x0C,0x00,0x0C,0x0C,0x0C,0x00, // | +0x70,0x18,0x18,0x0E,0x18,0x18,0x70,0x00, // } +0x3B,0x6E,0x00,0x00,0x00,0x00,0x00,0x00, // ~ +0x1C,0x36,0x36,0x1C,0x00,0x00,0x00,0x00}; // DEL + +GraphicsDisplay::GraphicsDisplay() { + foreground(0x00FFFFFF); + background(0x00000000); +} + +void GraphicsDisplay::character(int column, int row, int value) { + blitbit(column * 8, row * 8, 8, 8, (char*)&(FONT8x8[value - 0x1F][0])); +} + +void GraphicsDisplay::window(int x, int y, int w, int h) { + // current pixel location + _x = x; + _y = y; + // window settings + _x1 = x; + _x2 = x + w - 1; + _y1 = y; + _y2 = y + h - 1; +} + +void GraphicsDisplay::putp(int colour) { + // put pixel at current pixel location + pixel(_x, _y, colour); + // update pixel location based on window settings + _x++; + if(_x > _x2) { + _x = _x1; + _y++; + if(_y > _y2) { + _y = _y1; + } + } +} + +void GraphicsDisplay::fill(int x, int y, int w, int h, int colour) { + window(x, y, w, h); + for(int i=0; i<w*h; i++) { + putp(colour); + } +} + +void GraphicsDisplay::cls() { + fill(0, 0, width(), height(), _background); +} + +void GraphicsDisplay::blit(int x, int y, int w, int h, const int *colour) { + window(x, y, w, h); + for(int i=0; i<w*h; i++) { + putp(colour[i]); + } +} + +void GraphicsDisplay::blitbit(int x, int y, int w, int h, const char* colour) { + window(x, y, w, h); + for(int i = 0; i < w*h; i++) { + char byte = colour[i >> 3]; + int offset = i & 0x7; + int c = ((byte << offset) & 0x80) ? _foreground : _background; + putp(c); + } +} + +int GraphicsDisplay::columns() { + return width() / 8; +} + +int GraphicsDisplay::rows() { + return height() / 8; +}
--- /dev/null Thu Jan 01 00:00:00 1970 +0000 +++ b/GraphicsDisplay.h Tue Jun 15 20:21:07 2010 +0000 @@ -0,0 +1,55 @@ +/* mbed GraphicsDisplay Display Library Base Class + * Copyright (c) 2007-2009 sford + * Released under the MIT License: http://mbed.org/license/mit + * + * A library for providing a common base class for Graphics displays + * To port a new display, derive from this class and implement + * the constructor (setup the display), pixel (put a pixel + * at a location), width and height functions. Everything else + * (locate, printf, putc, cls, window, putp, fill, blit, blitbit) + * will come for free. You can also provide a specialised implementation + * of window and putp to speed up the results + */ + +#ifndef MBED_GRAPHICSDISPLAY_H +#define MBED_GRAPHICSDISPLAY_H + +#include "TextDisplay.h" + +class GraphicsDisplay : public TextDisplay { + +public: + + GraphicsDisplay(); + + virtual void pixel(int x, int y, int colour) = 0; + virtual int width() = 0; + virtual int height() = 0; + + virtual void window(int x, int y, int w, int h); + virtual void putp(int colour); + + virtual void cls(); + virtual void fill(int x, int y, int w, int h, int colour); + virtual void blit(int x, int y, int w, int h, const int *colour); + virtual void blitbit(int x, int y, int w, int h, const char* colour); + + virtual void character(int column, int row, int value); + virtual int columns(); + virtual int rows(); + +protected: + + // pixel location + short _x; + short _y; + + // window location + short _x1; + short _x2; + short _y1; + short _y2; + +}; + +#endif
--- /dev/null Thu Jan 01 00:00:00 1970 +0000 +++ b/MSCFileSystem.h Tue Jun 15 20:21:07 2010 +0000 @@ -0,0 +1,49 @@ +/* USB Mass Storage device file system + * Copyrigh (c) 2010, Igor Skochinsky + * based on SDFileStorage + * Copyright (c) 2008-2009, sford + */ + +#ifndef MSCFILESYSTEM_H +#define MSCFILESYSTEM_H + +#include "mbed.h" +#include "FATFileSystem.h" + +/* Class: MSCFileSystem + * Access the filesystem on an attached USB mass storage device (e.g. a memory stick) + * + * Example: + * > MSCFileSystem msc("msc"); + * > + * > int main() { + * > FILE *fp = fopen("/msc/myfile.txt", "w"); + * > fprintf(fp, "Hello World!\n"); + * > fclose(fp); + * > } + */ +class MSCFileSystem : public FATFileSystem { +public: + + /* Constructor: MSCFileSystem + * Create the File System for accessing a USB mass storage device + * + * Parameters: + * name - The name used to access the filesystem + */ + MSCFileSystem(const char* name); + virtual int disk_initialize(); + virtual int disk_write(const char *buffer, int block_number); + virtual int disk_read(char *buffer, int block_number); + virtual int disk_status(); + virtual int disk_sync(); + virtual int disk_sectors(); + +protected: + + int initialise_msc(); + uint32_t _numBlks; + uint32_t _blkSize; +}; + +#endif
--- /dev/null Thu Jan 01 00:00:00 1970 +0000 +++ b/SDFileSystem.lib Tue Jun 15 20:21:07 2010 +0000 @@ -0,0 +1,1 @@ +http://mbed.org/users/simon/code/SDFileSystem/#b1ddfc9a9b25
--- /dev/null Thu Jan 01 00:00:00 1970 +0000 +++ b/TextDisplay.cpp Tue Jun 15 20:21:07 2010 +0000 @@ -0,0 +1,57 @@ +/* mbed TextDisplay Display Library Base Class + * Copyright (c) 2007-2009 sford + * Released under the MIT License: http://mbed.org/license/mit + */ + +#include "TextDisplay.h" + +TextDisplay::TextDisplay() { + _row = 0; + _column = 0; +} + +int TextDisplay::_putc(int value) { + if(value == '\n') { + _column = 0; + _row++; + if(_row >= rows()) { + _row = 0; + } + } else { + character(_column, _row, value); + _column++; + if(_column >= columns()) { + _column = 0; + _row++; + if(_row >= rows()) { + _row = 0; + } + } + } + return value; +} + +// crude cls implementation, should generally be overwritten in derived class +void TextDisplay::cls() { + locate(0, 0); + for(int i=0; i<columns()*rows(); i++) { + putc(' '); + } +} + +void TextDisplay::locate(int column, int row) { + _column = column; + _row = row; +} + +int TextDisplay::_getc() { + return -1; +} + +void TextDisplay::foreground(int colour) { + _foreground = colour; +} + +void TextDisplay::background(int colour) { + _background = colour; +}
--- /dev/null Thu Jan 01 00:00:00 1970 +0000 +++ b/TextDisplay.h Tue Jun 15 20:21:07 2010 +0000 @@ -0,0 +1,52 @@ +/* mbed TextDisplay Library Base Class + * Copyright (c) 2007-2009 sford + * Released under the MIT License: http://mbed.org/license/mit + * + * A common base class for Text displays + * To port a new display, derive from this class and implement + * the constructor (setup the display), character (put a character + * at a location), rows and columns (number of rows/cols) functions. + * Everything else (locate, printf, putc, cls) will come for free + * + * The model is the display will wrap at the right and bottom, so you can + * keep writing and will always get valid characters. The location is + * maintained internally to the class to make this easy + */ + +#ifndef MBED_TEXTDISPLAY_H +#define MBED_TEXTDISPLAY_H + +#include "mbed.h" + +class TextDisplay : public Stream { +public: + + // functions needing implementation in derived implementation class + TextDisplay(); + virtual void character(int column, int row, int c) = 0; + virtual int rows() = 0; + virtual int columns() = 0; + + // functions that come for free, but can be overwritten + virtual void cls(); + virtual void locate(int column, int row); + virtual void foreground(int colour); + virtual void background(int colour); + // putc (from Stream) + // printf (from Stream) + +protected: + + virtual int _putc(int value); + virtual int _getc(); + + // character location + short _column; + short _row; + + // colours + int _foreground; + int _background; +}; + +#endif
--- /dev/null Thu Jan 01 00:00:00 1970 +0000 +++ b/main.cpp Tue Jun 15 20:21:07 2010 +0000 @@ -0,0 +1,77 @@ +// Program monitors the temperature recorded on the EA LPCXpresso board's U7 +// There is an option to either display the temperature on the OLED or write to an SD card +// If writing to an SD card, be sure to only unplug the MBED or remove the SD card when LED3 is illuminated +// Removing power or the SD card when LED3 is not illuminated will result in a loss of data +// Temperature is monitored every 6 seconds in the current code + +#include "mbed.h" +#include "EAOLED.h" +#include "SDFileSystem.h" + +SDFileSystem sd(p5, p6, p7, p24, "sd"); //Used for file system writes to the EA SD card. Comment this out if displaying on OLED. +DigitalOut myled1(LED1); +DigitalOut myled2(LED2); +DigitalOut myled3(LED3); +//EAOLED oled(p5, p6, p7, p8, p25); // mosi, dnc, sclk, cs, power ***this is only used if displaying temp on OLED instead of file writing*** +InterruptIn sense(p8); //make sure EA board J25 is set to PIO0_2 ***if using the OLED, must change this to pin 10 and connect wire from J25 center pin to pin10 on mBed, make sure J25 does not have a jumper populated*** + +Timer timer; //timer used for keeping track of elapesd time +Timeout timeout; //timeout used for calculation of frequency +int edgecount, on, seconds; +float temp, freq, tempf; + +void edge(){ + edgecount = edgecount++; +} + +void attimeout(){ + on = 0; +} + +int main() { +// oled.cls(); //*** make sure this is not commented out if using the OLED +// oled.locate(0,0); //*** make sure this is not commented out if using the OLED +// oled.printf("Frequency:"); //*** make sure this is not commented out if using the OLED +// oled.locate(0,2); //*** make sure this is not commented out if using the OLED +// oled.printf("Temperature:"); //*** make sure this is not commented out if using the OLED + myled1 = 1; //indicates the program is running + timer.start(); //starts the tracking timer. Can comment this out if using the OLED. + FILE *fp = fopen("/sd/temperat.csv", "w"); //formats the file header. Comment this out if using the OLED. + fprintf(fp,"Time, Freq, TempC, TempF\n"); //Comment this out if using the OLED + fclose(fp); //Comment this out if using the OLED + + while(1){ + on=1; + edgecount = 0; + myled2 = 1; //indicates the temperature is being monitored + myled3 = 0; + FILE *fp = fopen("/sd/temperat.csv", "a"); //comment this out if using the OLED + + timeout.attach(&attimeout, 5); //sets the amount of time used to calcuate the frequency of the temp sensor + while(on){ + sense.rise(&edge); //tracks the rising edge of the temp sensor + } + + freq = (float)(edgecount)/5; //calculates the frequency. Change the divisior if changing the timeout.attach() +// oled.locate(0,1); //*** make sure this is not commented out if using the OLED +// oled.printf("%4.3f", freq); //*** make sure this is not commented out if using the OLED + temp = freq; + temp = 1/temp; //changes frequency into period + temp = temp*100000; //provides appropriate modifier if J26 is set to GND, GND. + temp = temp-273.15; //calculates the temperature in degrees C +// oled.locate(0,3); //*** make sure this is not commented out if using the OLED +// oled.printf("%2.3f", temp); //*** make sure this is not commented out if using the OLED + tempf = 9*temp; + tempf = tempf/5; + tempf = tempf + 32; //calcualtes the temperature in degrees F +// oled.locate(0,4); //*** make sure this is not commented out if using the OLED +// oled.printf("%2.3f", tempf); //*** make sure this is not commented out if using the OLED + seconds = timer.read(); //Reads the elaped time + fprintf(fp, "%d, ", seconds); //Comment this out if using the OLED + fprintf(fp,"%4.3f, %2.3f, %2.3f\n", freq, temp, tempf); //Comment this out if using the OLED + fclose(fp); //Comment this out if using the OLED + myled2 = 0; //indicates temperature monitoring is over + myled3 = 1; //indicates safe to remove power or SD card + wait(1); //wait time to allow for safe card removal or powerdown. Can be commented out if using OLED. + } +}
--- /dev/null Thu Jan 01 00:00:00 1970 +0000 +++ b/mbed.bld Tue Jun 15 20:21:07 2010 +0000 @@ -0,0 +1,1 @@ +http://mbed.org/users/mbed_official/code/mbed/builds/029aa53d7323