A tetris on Arduino
- Arduino uno
- 8x32 led matrix connected to the SPI pins (13-clk, 11-din, 10-cs)
- beeper connected through a potentiometer (volume regulation) to pin 8
- 4 buttons: right (pin 6), left (pin 5), rotate (pin 3) and place (pin 2)
The screen is composed by 4 8x8 segments. We will position the screen with the connector downwards, so that the first transmitted SPI command will be transmitted to the upper segment. Initial tests show that a "digit" on the MAX7219 will represent a column on the segment, and that digit 0 is the right column. Thus we can represent a segment with an array of 8 bytes representing the 8 columns from right to left, and then represent the screen with an array of 4 segments.
All pieces fit inside a 4x4 square. We will represent this space with an array of 4 bytes. We will also need the position of one corner of the piece space. This position could have negative values, as one column of the space may be empty and out of the screen.