UM0574

Demonstration firmware functionality description

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The firmware mode menu items:

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Mode "A" - Color Tetris

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Mode "B" - Wave color demonstration

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Mode "C" - Solid color demonstration

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Mode "D" - Error detection (DM)

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Mode "E" - Error detection LE + OE (Feature may not be available for all firmware

releases).

3.1

Mode "A" - Color Tetris

Mode "A" is a simple game similar to Tetris. The game begins with a green “brick” moving

from the bottom to the top of the LED display. The X-axis position of the brick can be

controlled using the left and right buttons. Once the brick reaches the top of an LED area

occupied by another settled brick, it settles also and its color changes to blue. Once the

brick becomes blue, it cannot be moved. When a full row of blue bricks is completed, the row

disappears and the player is awarded points. The game ends when the blue bricks reach the

bottom of the LED area. When the game is over, the points obtained are shown. Pressing

the center button starts new game. The knob changes the light intensity of the LEDs.

3.2

Mode "B" - Wave color demonstration

Mode "B" demonstrates various color effects. The effect changes automatically after a few

cycles of a given effect. The effect can also be changed manually using the center button.

The knob changes the speed of the effect.

3.3

Mode "C" - Solid color demonstration

Mode "C" allows the display of a single color on all of the LEDs. Pressing of the right button

changes the colors in the following order: red, green, blue, yellow (red + green), cyan (green

+ blue), magenta (red + blue), white (red + green + blue) and black (all LEDs off). The left

button changes the colors in the reverse order. The knob changes the light intensity of the

LEDs.

3.4

Mode "D" - Error detection (DM)

Mode "D" performs and displays the detection of faulty LEDs. Every two seconds, an error

detection is performed by the LED drivers. If any defective LEDs are detected, they can be

identified by red light on the corresponding LED diode position. By opening P20, P21 and

P22, an open circuit can be created (LED defective by disconnection) to simulate a defect of

the D1-green, D2-green and D3-green LEDs, as shown in Figure 5. By closing P1, P2 and

P3, a short-circuit is created (LED defective by shorting) to simulate a defect of the D6-blue,

D9-blue and D12-blue LEDs. Entering the diagnostic mode is done using the DM signal.