- ANALOG METER, initial offering - Emulation of an analog/mechanical meter using the SPI TFT display \"http://mbed.org/cookbook/SPI-driven-QVGA-TFT\" (touch not used) Meter takes an integer number from 0 - 100 and uses that number to position the meter\'s needle - An additional auto-scaling feature allows for + floating numbers from 0.0 - 10000.0 in \"NewfNumb\" Scaling is noted two ways a. Color of the meter body changes b. A text scale factor is displayed in the upper, right-hand corner, near the full scale reading Value of \"NewfNumb\" Meter_Body Scale_Factor < -0.0 Blue 0 0.1 - 9.9 Green x1 10.0 - 99.0 Yellow x10 100.0 - 999.0 Orange x100 1000.0 - 9990.0 Red x1k >= 10000.0 Red peg! - If NewfNumb is > 600.0, a flashing yellow warning message appears in the center of the meter movement - The date and time are displayed in the lower right corner of the display - The value of NewfNumb being shown in the movement is also displayed in the lower left coener of the display - A timer ISR automatically updates the meter\'s movement Other Stuff: - Additional demo test program, walks analog meter up and down through all auto scales by manipulating the value of NewfNumb - USB serial port used to dump a few messages. Not needed, set to 921600 BAUD - LED1 slowly gets brighter and dimmer as main loop runs - If for some reason, the \"MeterNumber\" int register ends up >100 or <0, a Purple display appears at 50% movement with a \"bad#\" scale factor - There is NO provision for setting the RTC. Note that TimeZone and DST are added to the RTC number
SPI_TFT/TextDisplay.cpp
- Committer:
- loopsva
- Date:
- 2012-01-31
- Revision:
- 0:fc70640071d2
File content as of revision 0:fc70640071d2:
/* 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(const char *name) : Stream(name){ _row = 0; _column = 0; if (name == NULL) { _path = NULL; } else { _path = new char[strlen(name) + 2]; sprintf(_path, "/%s", name); } } 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(uint16_t colour) { _foreground = colour; } void TextDisplay::background(uint16_t colour) { _background = colour; } bool TextDisplay::claim (FILE *stream) { if ( _path == NULL) { fprintf(stderr, "claim requires a name to be given in the instantioator of the TextDisplay instance!\r\n"); return false; } if (freopen(_path, "w", stream) == NULL) { // Failed, should not happen return false; } // make sure we use line buffering setvbuf(stdout, NULL, _IOLBF, columns()); return true; }