Mon, 31 May 2021 16:52:10 +0200
Added kicad schemas
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Initial import of the CO2 meter application.
Michiel Broek <mbroek@mbse.eu>
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1 | |
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2 | U8glib V2: Name and project goals |
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3 | |
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4 | https://github.com/olikraus/u8g2 |
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5 | |
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6 | U8g2 = Universal 8bit Graphics |
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7 | |
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8 | [U]niversal: Support for many displays ans development platforms |
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9 | [8]bit: Initial focus had been 8 bit microcontroller systems |
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10 | [g]raphics": U8g2 is a graphics library with focus on monochrome graphics displays |
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11 | [2]: Second generation and successor of u8glib |
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12 | |
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Initial import of the CO2 meter application.
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13 | |
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14 | U8glib V2 Goals |
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15 | |
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16 | - Support for monochrome LCDs and OLEDs |
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17 | - Focus on "monochrome" |
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18 | - Low memory footprint |
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19 | |
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Initial import of the CO2 meter application.
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20 | |
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21 | U8glib V2: Features and Limitations |
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22 | |
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23 | - Full Memory Buffer |
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24 | - 3-wire-SPI |
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25 | - Support for Arduino Libraries SPI and TWI |
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26 | |
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27 | - Unicode Support |
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28 | Unicode plane 0 (Basic Multilingual Plane, BMP, glyphs with 0x0000-0xffff) |
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29 | is fully supported. |
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30 | Limitation: Unicode planes > 0 are not supported |
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31 | - UTF-8 Support |
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32 | 2 and 3 byte sequences are detected and handled. |
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33 | Limitation: |
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34 | Behavior for sequences with more than 3 bytes is unknown. |
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35 | |
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36 | - Large number of fonts |
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37 | |
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38 | - Compilation speed improved (font data) |
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39 | |
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40 | - "Text only" sub library: U8x8 |
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41 | |
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42 | - Hardware supported display flip |
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43 | |
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44 | - Better hardware support: Tested with avr, esp8266 and sam architectures. |
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45 | |
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46 | |
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47 | u8g vs. u8g2 |
88d965579617
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48 | |
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49 | Major Changes (Code rework required) |
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50 | |
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51 | - The name of the include file has changed: Use |
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52 | #include "U8g2lib.h" |
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53 | - The native type for pixel coordinates has changed to u8g2_uint_t |
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54 | Use the following line to redefine this at the beginning of your code |
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55 | typedef u8g2_uint_t u8g_uint_t; |
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56 | |
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57 | - Old Arduino IDE 00xx (before 1.00) is not supported any more. |
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58 | ARDUINO macro must be >= 100 |
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59 | - begin() must be called (this was optional in U8glib) |
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60 | - constructor contains name of communicaton interface and |
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61 | also contains the display orientation as first argument |
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62 | - u8g2.drawStr90 does not exist any more, use |
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63 | void u8g2_SetFontDirection(u8g2_t *u8g2, uint8_t dir); |
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64 | - "P" versions of the string functions are not yet implemented. |
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65 | This includes drawStrP(), getStrWidthP(), etc |
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66 | Use the print function with the F() macro instead. |
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67 | - In U8glib font transparency was defined in the .begin() statement. This is now |
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68 | handled by setFontMode(). |
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69 | - Screen rotation is handled by the constructor in u8g2 |
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70 | The functions undoRotation, setRot90, setRot180 and setRot270 are |
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71 | replaced by the first argument of the constructor |
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72 | - Screen scaling is not there in u8g2 |
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73 | It is completly removed, there are no corresponding function in u8g2 |
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74 | for undoScale() and setScale2x2(). |
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75 | - setColorEntry(), setHiColor(), setHiColorByRGB(), setRGB: Not supported any more |
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76 | (u8g2 focus are monochrome displays, use Ucglib instead) |
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77 | - getMode(): Is not available any more because there is only one monochrome mode. |
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78 | - setDefaultForegroundColor(), setDefaultBackgroundColor() and |
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79 | setDefaultMidColor() are not required any more. These functions do not |
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80 | exist in U8g2. Use setDrawColor() instead. |
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81 | - getFontLineSpacing() and setFontLineSpacingFactor() are not supported any more. |
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82 | - getStrPixelWidth() is replaced by getStrWidth() |
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83 | - setHardwareBackup() not supported any more. Might be implemented later |
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84 | - Cursor functions are not available. This includes: |
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85 | setCursorFont(), setCursorStyle(), setCursorPos(), setCursorColor(), |
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86 | enableCursor(), disableCursor(), drawCursor() |
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87 | - Virtual screen handling is not supported: |
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88 | setVirtualScreenDimension(), addToVirtualScreen() |
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89 | |
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90 | Minor Changes (Code update might be required) |
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91 | |
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92 | - U8g2 drawTriangle() expects signed arguments (u8glib expects unsigned arguments) |
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93 | - U8g2 has different font names. Some of the old font names are known to u8g2 and are |
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94 | mapped automatically. If the font name is unknown, please choose a different font from the font list. |
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95 | |
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96 | Change Notes (No code change required) |
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97 | |
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98 | - sleepOn(), sleepOff(): supported, but better user setPowerSave() |
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99 | - setColorIndex() and getColorIndex() are renamed to setDrawColor() and |
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100 | getDrawColor(). The old names are still supported. |
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101 | - getFontAscent() and getFontDescent() are renamed to getAscent() and getDescent() |
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102 | The old names are still supported. |
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103 | - Signal names are renamed in the constructor calls: |
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104 | U8glib sck == U8g2 clock |
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105 | U8glib mosi == U8g2 data |
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106 | U8glib a0 == U8g2 dc |
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107 | - getHeight() renamed to getDisplayHeight(), old name still exists |
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108 | - getWidth() renamed to getDisplayWidth(), old name still exists |
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109 | |
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110 |