* the coordinate of the starting y on the y axis, values y>=0 and the relationship of x and y should be: (x-64)^2 (y-64)^2 SPI_SCL * the coordinate data of the pixel y on the y axis, values range and the relationship between x and y should be: x^2 y^2=0 * formal parameter：the coordinate data of the pixel point x on the x axis, values range * functionality of the function: draw pixel point There are 19 common defined colors in the function library, and users can also customize other colors
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* formal parameter color: values range or 4-bit hexadecimal code * functionality of the screen: refresh the color of the screen The text out of the screen cannot be displayed Size is rounded to the integer greater than 0 if size is 1, the pixel points the font occupied will be 6×8. * formal parameter size refers to the text size based on the font(6×8). * functionality of the function: set the size of the text For more information, please refer to ST7687S Library Introduction and Display Library Introduction. The following codes are just one part of the API funciotn description. The origin of the graphic display coordinates begin from the centre point of the screen while that of the later one begins from the top left hand side of the screen. The graphic display coordinates and the text display coordinates of the 2.2”screen are two different coordinates systems.
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Arduino IDE, click to download Arduino IDE.Counterclockwise rotation to brighten the screen. Note: the brightness of the screen can be adjusted through the potentiometer( in the red box of the above diagram). SpecificationĪrduino Platform Applications Arduino Connection Diagram Note: the parameter “2.2 inches” is noted according to the Display Specification provided by the display supplier, the real display area is about 1.26 inches (diameter: 32mm).
If we take the central point of the display as the origin of coordinates, the maximum absolute value of the positive and negative semi-axes will be 64. At present, there are 19 common defined colors in the library, and users can also customize16-bit color codes. The module is able to display multiple patterns in a cycle and realize dynamic display effect. The fastest screen refresh speed is about 256ms. This is a 2.2” TFT LCD Display Module with an input voltage of 3.3V~5.5V, which is used to display colorful patterns and characters.
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