FPGA Projects Collection

Segment displays

Driving a segments display is rather simple. All we have to do is create a look up table that corresponds to the individual segments and we’re all good .

The same process is repeated for three displays. Each display can show up to 4 bits. Note that we are displaying the binary numbers as hexadecimal on the segment displays. (The video below has been reflected for some reason).

Counters

This counter starts counting whenver en is pressed. The KEY button is AND’ed with the main system clock, and is wired to the enable port of the CTR module.

Linear feedback shift registers

Linear feedback shift registers allow us to generate a sequence of seemingly random numbers. For this reason, they are called “pseudorandom” as the sequence is completely predictable.

PWM generator

• The ramp generator produces a Sawtooth wavefore
• The data register updates its output at rate of the frequency of the pulses outputted from clktick module.
• The sawtooth wave generator is connected to the negative input of the digital comparator, hence the comparator only outputs 1 if the wave is smaller than the positive input data_in
• Increasing data_in increases the duty cycle of the digital comapartor's output