- 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
Diff: SPI_TFT/TextDisplay.cpp
- Revision:
- 0:fc70640071d2
--- /dev/null Thu Jan 01 00:00:00 1970 +0000 +++ b/SPI_TFT/TextDisplay.cpp Tue Jan 31 19:40:57 2012 +0000 @@ -0,0 +1,77 @@ +/* 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; +}