Support/hardware demonstration
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The demonstration system plays music on loudspeakers.
System
The following system is used to show digital electronic parts to students.
The block diagram is:
The FPGA design can be found in the HEI SVN.
Specification
To generate the PWM signal we have to compare the sinewave signal (tone) and a signal sawtooth signal whitch be generate with the counter.
The block diagram is:
With the block which has in entry (in put: PWM_out) and (output: C0, C1) we are going to get back the whole signal PWM_out.
The output C0=1 when PWM_out=0 and the output C1=1 when PWM_out=1.
The test block is defined below: