- 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@0:fc70640071d2, 2012-01-31 (annotated)
- Committer:
- loopsva
- Date:
- Tue Jan 31 19:40:57 2012 +0000
- Revision:
- 0:fc70640071d2
100
Who changed what in which revision?
User | Revision | Line number | New contents of line |
---|---|---|---|
loopsva | 0:fc70640071d2 | 1 | /* mbed TextDisplay Display Library Base Class |
loopsva | 0:fc70640071d2 | 2 | * Copyright (c) 2007-2009 sford |
loopsva | 0:fc70640071d2 | 3 | * Released under the MIT License: http://mbed.org/license/mit |
loopsva | 0:fc70640071d2 | 4 | */ |
loopsva | 0:fc70640071d2 | 5 | |
loopsva | 0:fc70640071d2 | 6 | #include "TextDisplay.h" |
loopsva | 0:fc70640071d2 | 7 | |
loopsva | 0:fc70640071d2 | 8 | TextDisplay::TextDisplay(const char *name) : Stream(name){ |
loopsva | 0:fc70640071d2 | 9 | _row = 0; |
loopsva | 0:fc70640071d2 | 10 | _column = 0; |
loopsva | 0:fc70640071d2 | 11 | if (name == NULL) { |
loopsva | 0:fc70640071d2 | 12 | _path = NULL; |
loopsva | 0:fc70640071d2 | 13 | } else { |
loopsva | 0:fc70640071d2 | 14 | _path = new char[strlen(name) + 2]; |
loopsva | 0:fc70640071d2 | 15 | sprintf(_path, "/%s", name); |
loopsva | 0:fc70640071d2 | 16 | } |
loopsva | 0:fc70640071d2 | 17 | } |
loopsva | 0:fc70640071d2 | 18 | |
loopsva | 0:fc70640071d2 | 19 | int TextDisplay::_putc(int value) { |
loopsva | 0:fc70640071d2 | 20 | if(value == '\n') { |
loopsva | 0:fc70640071d2 | 21 | _column = 0; |
loopsva | 0:fc70640071d2 | 22 | _row++; |
loopsva | 0:fc70640071d2 | 23 | if(_row >= rows()) { |
loopsva | 0:fc70640071d2 | 24 | _row = 0; |
loopsva | 0:fc70640071d2 | 25 | } |
loopsva | 0:fc70640071d2 | 26 | } else { |
loopsva | 0:fc70640071d2 | 27 | character(_column, _row, value); |
loopsva | 0:fc70640071d2 | 28 | _column++; |
loopsva | 0:fc70640071d2 | 29 | if(_column >= columns()) { |
loopsva | 0:fc70640071d2 | 30 | _column = 0; |
loopsva | 0:fc70640071d2 | 31 | _row++; |
loopsva | 0:fc70640071d2 | 32 | if(_row >= rows()) { |
loopsva | 0:fc70640071d2 | 33 | _row = 0; |
loopsva | 0:fc70640071d2 | 34 | } |
loopsva | 0:fc70640071d2 | 35 | } |
loopsva | 0:fc70640071d2 | 36 | } |
loopsva | 0:fc70640071d2 | 37 | return value; |
loopsva | 0:fc70640071d2 | 38 | } |
loopsva | 0:fc70640071d2 | 39 | |
loopsva | 0:fc70640071d2 | 40 | // crude cls implementation, should generally be overwritten in derived class |
loopsva | 0:fc70640071d2 | 41 | void TextDisplay::cls() { |
loopsva | 0:fc70640071d2 | 42 | locate(0, 0); |
loopsva | 0:fc70640071d2 | 43 | for(int i=0; i<columns()*rows(); i++) { |
loopsva | 0:fc70640071d2 | 44 | putc(' '); |
loopsva | 0:fc70640071d2 | 45 | } |
loopsva | 0:fc70640071d2 | 46 | } |
loopsva | 0:fc70640071d2 | 47 | |
loopsva | 0:fc70640071d2 | 48 | void TextDisplay::locate(int column, int row) { |
loopsva | 0:fc70640071d2 | 49 | _column = column; |
loopsva | 0:fc70640071d2 | 50 | _row = row; |
loopsva | 0:fc70640071d2 | 51 | } |
loopsva | 0:fc70640071d2 | 52 | |
loopsva | 0:fc70640071d2 | 53 | int TextDisplay::_getc() { |
loopsva | 0:fc70640071d2 | 54 | return -1; |
loopsva | 0:fc70640071d2 | 55 | } |
loopsva | 0:fc70640071d2 | 56 | |
loopsva | 0:fc70640071d2 | 57 | void TextDisplay::foreground(uint16_t colour) { |
loopsva | 0:fc70640071d2 | 58 | _foreground = colour; |
loopsva | 0:fc70640071d2 | 59 | } |
loopsva | 0:fc70640071d2 | 60 | |
loopsva | 0:fc70640071d2 | 61 | void TextDisplay::background(uint16_t colour) { |
loopsva | 0:fc70640071d2 | 62 | _background = colour; |
loopsva | 0:fc70640071d2 | 63 | } |
loopsva | 0:fc70640071d2 | 64 | |
loopsva | 0:fc70640071d2 | 65 | bool TextDisplay::claim (FILE *stream) { |
loopsva | 0:fc70640071d2 | 66 | if ( _path == NULL) { |
loopsva | 0:fc70640071d2 | 67 | fprintf(stderr, "claim requires a name to be given in the instantioator of the TextDisplay instance!\r\n"); |
loopsva | 0:fc70640071d2 | 68 | return false; |
loopsva | 0:fc70640071d2 | 69 | } |
loopsva | 0:fc70640071d2 | 70 | if (freopen(_path, "w", stream) == NULL) { |
loopsva | 0:fc70640071d2 | 71 | // Failed, should not happen |
loopsva | 0:fc70640071d2 | 72 | return false; |
loopsva | 0:fc70640071d2 | 73 | } |
loopsva | 0:fc70640071d2 | 74 | // make sure we use line buffering |
loopsva | 0:fc70640071d2 | 75 | setvbuf(stdout, NULL, _IOLBF, columns()); |
loopsva | 0:fc70640071d2 | 76 | return true; |
loopsva | 0:fc70640071d2 | 77 | } |