Exercises

7.1 Give some application areas of GLCDs.

7.2 Draw a circuit diagram to show the connection between a GLCD and a microcontroller. How many I/O pins are required to interface to a GLCD?

7.3 Explain operation of the KS0108 type GLCDs. How many pixels are there? How are the pixels organised?

7.4 Draw a diagram to show the x and y axes of the standard 128 × 64 pixel GLCD. Mark the (0,0) point on your diagram.

7.5 Show how the GLCD library functions can be used to draw a rectangle.

7.6 Show how the GLCD library functions can be used to draw a circle.

7.7 Explain how a bitmap image that you have created can be loaded and displayed on a GLCD.

7.8 Explain how many types of touch screens are available. What are the advantages and disadvantages of each type?

7.9 Explain how the co-ordinates of a point touched on the screen can be read by a microcontroller.

7.10 What are the advantages and disadvantages of resistive and capacitive touch screens?