Test SD
Dependencies: FatFileSystem SDFileSystem mbed
Revision 0:f46b40e04fdd, committed 2012-12-25
- Comitter:
- Tomoseec
- Date:
- Tue Dec 25 08:37:27 2012 +0000
- Commit message:
- Test SD
Changed in this revision
diff -r 000000000000 -r f46b40e04fdd FATFileSystem.lib --- /dev/null Thu Jan 01 00:00:00 1970 +0000 +++ b/FATFileSystem.lib Tue Dec 25 08:37:27 2012 +0000 @@ -0,0 +1,1 @@ +http://mbed.org/users/mbed_unsupported/code/FatFileSystem/#333d6e93e58f
diff -r 000000000000 -r f46b40e04fdd SDFileSystem.lib --- /dev/null Thu Jan 01 00:00:00 1970 +0000 +++ b/SDFileSystem.lib Tue Dec 25 08:37:27 2012 +0000 @@ -0,0 +1,1 @@ +http://mbed.org/users/jksoft/code/SDFileSystem/#b1012ad93980
diff -r 000000000000 -r f46b40e04fdd TextLCD.cpp --- /dev/null Thu Jan 01 00:00:00 1970 +0000 +++ b/TextLCD.cpp Tue Dec 25 08:37:27 2012 +0000 @@ -0,0 +1,153 @@ +/* mbed TextLCD Library + * Copyright (c) 2007-2009 sford + * Released under the MIT License: http://mbed.org/license/mit + * + * TODO: Needs serious rework/neatening up! + */ + +#include "TextLCD.h" + +#include "mbed.h" +#include "error.h" + +using namespace mbed; + +/* + * useful info found at http://www.a-netz.de/lcd.en.php + * + * + * Initialisation + * ============== + * + * After attaching the supply voltage/after a reset, the display needs to be brought in to a defined state + * + * - wait approximately 15 ms so the display is ready to execute commands + * - Execute the command 0x30 ("Display Settings") three times (wait 1,64ms after each command, the busy flag cannot be queried now). + * - The display is in 8 bit mode, so if you have only connected 4 data pins you should only transmit the higher nibble of each command. + * - If you want to use the 4 bit mode, now you can execute the command to switch over to this mode now. + * - Execute the "clear display" command + * + * Timing + * ====== + * + * Nearly all commands transmitted to the display need 40us for execution. + * Exceptions are the commands "Clear Display and Reset" and "Set Cursor to Start Position" + * These commands need 1.64ms for execution. These timings are valid for all displays working with an + * internal clock of 250kHz. But I do not know any displays that use other frequencies. Any time you + * can use the busy flag to test if the display is ready to accept the next command. + * + * _e is kept high apart from calling clock + * _rw is kept 0 (write) apart from actions that uyse it differently + * _rs is set by the data/command writes + */ + +TextLCD::TextLCD(PinName rs, PinName rw, PinName e, PinName d0, PinName d1, + PinName d2, PinName d3, int columns, int rows) : _rw(rw), _rs(rs), + _e(e), _d(d0, d1, d2, d3), _columns(columns), _rows(rows) { + +// _rows = 2; +// _columns = 16; + // Mon, 27 Apr 2009 23:32:34 +0200 + // Kevin Konradt: + // When using a LCD with 1 row x 16 characters + // instead of 2x16, try changing _columns to 8. + // (display seems to split the 16 characters into + // 2 virtual rows with 8 characters each.) + + _rw = 0; + _e = 1; + _rs = 0; // command mode + + // Should theoretically wait 15ms, but most things will be powered up pre-reset + // so i'll disable that for the minute. If implemented, could wait 15ms post reset + // instead + // wait(0.015); + + // send "Display Settings" 3 times (Only top nibble of 0x30 as we've got 4-bit bus) + for(int i=0; i<3; i++) { + writeNibble(0x3); + wait(0.00164); // this command takes 1.64ms, so wait for it + } + writeNibble(0x2); // 4-bit mode + + writeCommand(0x28); // Function set 001 BW N F - - + writeCommand(0x0C); + writeCommand(0x6); // Cursor Direction and Display Shift : 0000 01 CD S (CD 0-left, 1-right S(hift) 0-no, 1-yes + + cls(); +} + +int TextLCD::_putc(int value) { + if(value == '\n') { + newline(); + } else { + writeData(value); + } + return value; +} + +int TextLCD::_getc() { + return 0; +} + +void TextLCD::newline() { + _column = 0; + _row++; + if(_row >= _rows) { + _row = 0; + } + locate(_column, _row); +} + +void TextLCD::locate(int column, int row) { + if(column < 0 || column >= _columns || row < 0 || row >= _rows) { + error("locate(%d,%d) out of range on %dx%d display", column, row, _columns, _rows); + return; + } + + _row = row; + _column = column; + int address = 0x80 + (_row * 40) + _column; // memory starts at 0x80, and is 40 chars long per row + writeCommand(address); +} + +void TextLCD::cls() { + writeCommand(0x01); // Clear Display + wait(0.00164f); // This command takes 1.64 ms + locate(0, 0); +} + +void TextLCD::reset() { + cls(); +} + +void TextLCD::clock() { + wait(0.000040f); + _e = 0; + wait(0.000040f); // most instructions take 40us + _e = 1; +} + +void TextLCD::writeNibble(int value) { + _d = value; + clock(); +} + +void TextLCD::writeByte(int value) { + writeNibble(value >> 4); + writeNibble(value >> 0); +} + +void TextLCD::writeCommand(int command) { + _rs = 0; + writeByte(command); +} + +void TextLCD::writeData(int data) { + _rs = 1; + writeByte(data); + _column++; + if(_column >= _columns) { + newline(); + } +}
diff -r 000000000000 -r f46b40e04fdd TextLCD.h --- /dev/null Thu Jan 01 00:00:00 1970 +0000 +++ b/TextLCD.h Tue Dec 25 08:37:27 2012 +0000 @@ -0,0 +1,111 @@ +/* mbed TextLCD Library + * Copyright (c) 2007-2009 sford + * Released under the MIT License: http://mbed.org/license/mit + * + * TODO: Needs serious rework/neatening up! + */ + +#ifndef MBED_TEXTLCD_H +#define MBED_TEXTLCD_H + +#include "Stream.h" +#include "DigitalOut.h" +#include "BusOut.h" + +namespace mbed { + +/* Class: TextLCD + * A 16x2 Text LCD controller + * + * Allows you to print to a Text LCD screen, and locate/cls. Could be + * turned in to a more generic libray. + * + * If you are connecting multiple displays, you can connect them all in + * parallel except for the enable (e) pin, which must be unique for each + * display. + * + * Example: + * > #include "mbed.h" + * > #include "TextLCD.h" + * > + * > TextLCD lcd(p24, p25, p26, p27, p28, p29, p30); // rs, rw, e, d0, d1, d2, d3 + * > + * > int main() { + * > lcd.printf("Hello World!"); + * > } + */ +class TextLCD : public Stream { + +public: + /* Constructor: TextLCD + * Create a TextLCD object, connected to the specified pins + * + * All signals must be connected to DigitalIn compatible pins. + * + * Variables: + * rs - Used to specify data or command + * rw - Used to determine read or write + * e - enable + * d0..d3 - The data lines + */ + TextLCD(PinName rs, PinName rw, PinName e, PinName d0, PinName d1, + PinName d2, PinName d3, int columns = 16, int rows = 2); + +#if 0 // Inhereted from Stream, for documentation only + /* Function: putc + * Write a character + * + * Variables: + * c - The character to write to the serial port + */ + int putc(int c); + + /* Function: printf + * Write a formated string + * + * Variables: + * format - A printf-style format string, followed by the + * variables to use in formating the string. + */ + int printf(const char* format, ...); +#endif + + /* Function: locate + * Locate to a certian position + * + * Variables: + * column - the column to locate to, from 0..15 + * row - the row to locate to, from 0..1 + */ + virtual void locate(int column, int row); + + /* Function: cls + * Clear the screen, and locate to 0,0 + */ + virtual void cls(); + + virtual void reset(); + +//protected: + + void clock(); + void writeData(int data); + void writeCommand(int command); + void writeByte(int value); + void writeNibble(int value); + virtual int _putc(int c); + virtual int _getc(); + virtual void newline(); + + int _row; + int _column; + DigitalOut _rw, _rs, _e; + BusOut _d; + int _columns; + int _rows; + +}; + +} + +#endif
diff -r 000000000000 -r f46b40e04fdd main.cpp --- /dev/null Thu Jan 01 00:00:00 1970 +0000 +++ b/main.cpp Tue Dec 25 08:37:27 2012 +0000 @@ -0,0 +1,39 @@ +// example writing to SD card, sford + +#include "mbed.h" +#include "SDFileSystem.h" +#include "TextLCD.h" + +TextLCD lcd(p24, p25, p26, p27, p28, p29, p30);//NGX mX-Base-Board Ver1.2 Type +//(PinName rs, PinName rw, PinName e, PinName d0, PinName d1, PinName d2, PinName d3, int columns, int rows) + +DigitalOut led(LED1); + +SDFileSystem sd(p5, p6, p7, p8, "sd"); // the pinout on the mbed Cool Components workshop board + // mosi, miso, sclk, cs + +int main() { + + lcd.cls(); + lcd.locate(0,0); + lcd.printf("Hello SD!\n"); + + mkdir("/sd/Tomodir", 0777); + + FILE *fp = fopen("/sd/Tomodir/Tomo.txt", "w"); + if(fp == NULL) { + error("Could not open file for write\n"); + } + fprintf(fp, "heehaw!"); + fclose(fp); + + lcd.locate(0,1); + lcd.printf("Goodbye SD!\n"); + + while(1) { + led = 1; + wait(0.2); + led = 0; + wait(0.2); + } +}
diff -r 000000000000 -r f46b40e04fdd mbed.bld --- /dev/null Thu Jan 01 00:00:00 1970 +0000 +++ b/mbed.bld Tue Dec 25 08:37:27 2012 +0000 @@ -0,0 +1,1 @@ +http://mbed.org/users/mbed_official/code/mbed/builds/e2ac27c8e93e \ No newline at end of file