Zolozuru The PCB will be revised as part of this change. The Sunplus controller used on the current parts is being replaced with a compatible controller. Evidence of lfd stress to parts including but not limited to. We have a display for that! Low to write to the register; High to read from the register. Arduino based GPS receiver.
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Graphic LCD displays are a good addition for any project where you want to display some data. They look better than the old fashioned 7 segment displays and even alphanumeric LCDs, but more than that, you can use them to build user interfaces and menus.
This is a monochrome graphics display library which supports a lot of LCD controllers and screens of different sizes. It is very easy to use and comes with a lot of functions and display fonts. But this comes with a price. Text is drawn on LCD in graphics mode this is how it renders different fonts. Combine this with the fact that in serial mode, some LCD controllers are write only.
Therefore, the library must keep a part or the entire display data in RAM. With this in mind and wanting to learn how to control a graphic LCD, I started to develop my own code. It turned out to be simpler than I thought. Simple code also means simple porting to other platforms. ST is a chip manufactured by Sitronix and has support for Chinese alphabet.
ST supported English characters source: datasheet This is enough for most users and keep in mind that while you are in graphic mode, you can draw any character you want, anywhere on the display.
In text mode, the LCD has 4 rows of 16 characters. Connecting the display in serial mode is easy. It is also recommended to connect the reset pin. Look on the back of your LCD board.
You should also note that some manufacturers hardwire the LCD to either parallel or serial mode. The RST pin can connect to any digital output pin.
According to datasheet, SPI clock cycle should be at least ns. This means a maximum frequency of 1. The first one holds the state for RS bit and therefore toggles the controller between instruction and data mode.
The rest of two bytes contain one half of the useful byte. Wikipedia has a good article on SPI modes. To improve code readability, Zhongxu used some definitions for ST registers. It is active low. After reset, the display is configured by writing four instructions refer to datasheet, page 16 : Function set clears RE bit switches to basic instruction.
Display clear fills character ram with spaces and resets address counter. Now, the display is ON and awaiting text to be displayed. Character RAM of ST If you start sending a character array to ST the address counter will increment automatically and fill the first row Line 1 of text with 16 characters.
Then it jumps to the third row Line 2 of text and fills it with the next 16 characters. After that comes second row Line 3 of text and fourth row Line 4 of text. Placing text at specified position requires setting RAM address. The RAM is optimized for Chinese 16x16 characters. Therefore, writing regular 8x16 characters is a bit different. You write two characters at a time. The one next to it will remain unchanged unless you sent something.
To write a string, set initial address then continue transferring the string one character by character.
128x64 Parallel Graphic LCD
Graphic LCD displays are a good addition for any project where you want to display some data. They look better than the old fashioned 7 segment displays and even alphanumeric LCDs, but more than that, you can use them to build user interfaces and menus. This is a monochrome graphics display library which supports a lot of LCD controllers and screens of different sizes. It is very easy to use and comes with a lot of functions and display fonts. But this comes with a price. Text is drawn on LCD in graphics mode this is how it renders different fonts.
128x64 Graphic LCD G12864B-BW-LW63
Graphic LCD 128x64