Understanding the Project and the Blocks Used

This project implements a line follower robot using an FPGA in ChipInventor. The system processes signals from two line sensors and controls the motors using demultiplexers (DEMUX) based on sensor readings.

Input Pins

• IO69: This pin receives the signal from the left line sensor. It detects whether the robot is on track by identifying a black line on a white surface.

• IO68: This pin receives the signal from the right line sensor.

Constant Value

• A constant logic value 1 represents the activation signal for the motors. It ensures a high logic level is always available for routing by the demultiplexers.

DEMUX Blocks (demux2)

• Two demux2 blocks are used to control the motors of the robot:

• They have three inputs:

• in: The activation signal (logic 1).

• select: The control signal from the line sensors (IO68 or IO69).

• clock in: Not used in this configuration (optional in some DEMUX blocks).

• Outputs:

• outa: Routes the signal if select = 0.

• outb: Routes the signal if select = 1.

• Each demux directs the activation signal to one of its two outputs depending on the line sensor reading.

Output Pins

• The demux outputs are connected to digital output pins:

• IO57 and IO56: Controlled by the left motor DEMUX.

• IO55 and IO54: Controlled by the right motor DEMUX.

• These pins can be wired to control H-bridges, motor drivers, or directly signal LEDs for testing.