arduino:displays_for_classic_arduinos:parallel_character_lcd_displays_and_classic_arduinos
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arduino:displays_for_classic_arduinos:parallel_character_lcd_displays_and_classic_arduinos [2018/01/30 16:47] – [Summary evaluation] mithat | arduino:displays_for_classic_arduinos:parallel_character_lcd_displays_and_classic_arduinos [2019/11/15 15:59] (current) – [Summary evaluation] mithat | ||
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Character LCDs with parallel inputs are available all over the place. The most common formats are 16x2 and 20x4, but you can find other widths and heights as well. They' | Character LCDs with parallel inputs are available all over the place. The most common formats are 16x2 and 20x4, but you can find other widths and heights as well. They' | ||
- | There' | + | There' |
- | A second issue is that they consume a lot of pins. There are I2C adapters available for the parallel interface though, which you' | + | A second issue is that they consume a lot of pins. There are I2C adapters available for the parallel interface though, which you may be able to read about in this wiki if I eventually work with one. |
===== Tests ===== | ===== Tests ===== | ||
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Arduino has a [[https:// | Arduino has a [[https:// | ||
- | I decided to get an idea of what the processing time and memory overhead using BigCrystal with a 20x4 display was. I used a 5V 16 Mhz Nano, and the display is probably an STN unit. The reported | + | I decided to get an idea of what the processing time and memory overhead using BigCrystal with a 20x4 display was. I used a 5V 16 Mhz Nano, and the display is probably an STN unit. The frame update time is around 14 msec and varies with the number of big characters being drawn. Memory use is 15% of program storage and 4% of dynamic memory. Because these numbers are so low, I didn't bother doing a test of the LiquidCrystal library on its own. |
- | FIXME video | + | {{youtube> |
[[arduino: | [[arduino: | ||
arduino/displays_for_classic_arduinos/parallel_character_lcd_displays_and_classic_arduinos.txt · Last modified: 2019/11/15 15:59 by mithat