2014:fpga_piano_lfsr_with_sine_wave_generator
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2014:fpga_piano_lfsr_with_sine_wave_generator [2014/12/18 22:54] teamuptownfunk |
2014:fpga_piano_lfsr_with_sine_wave_generator [2014/12/18 23:00] teamuptownfunk |
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| ==== How did we do it?==== | ==== How did we do it?==== | ||
| - | The first thing we needed to do was slow down the clock. We ran the clock through an Up Counter so that the flip flops would wait for the clock appropriately to get the correct signal at 440 Hz. We had an up counter for each note, but it was pointed out to us that we could have just one up counter and get the signal at any point of the up counter at the frequencies we wanted. | + | == Piano == |
| + | The first thing we needed to do was slow down the clock. We ran the clock through an Up Counter so that the flip flops would wait for the clock appropriately to get the correct signal at, for example, 440 Hz. We had an up counter for each note, but it was pointed out to us that we could have just one up counter and get the signal at any point of the up counter at the frequencies we wanted. The note modules (musicA, musicB, etc) each take in a clock, counter and enable and output to the speaker. We then created a LUT to We uploaded this to the FPGA after making a top level module that declared all the switches as the enables for the notes as mentioned above. | ||
| + | To upload to the FPGA, you need to open the project FPGAPiano in Xilinx and set top.v as the top level module. Then continue to synthesize, generalize, and configure as described in the FPGA tutorial. Now the switches will act as a piano! | ||
| + | == LFSR == | ||
| Using the LFSR, we initially attempted to listen to the output bits, a random collection of 0s and 1s. Since the output of the LFSR is approximately, random, we were expecting to hear just static. However, our problem is that we did not slow down our clock, so our speaker, outputting frequencies in the MHz, played a soft incredibly high-pitched noise. | Using the LFSR, we initially attempted to listen to the output bits, a random collection of 0s and 1s. Since the output of the LFSR is approximately, random, we were expecting to hear just static. However, our problem is that we did not slow down our clock, so our speaker, outputting frequencies in the MHz, played a soft incredibly high-pitched noise. | ||
2014/fpga_piano_lfsr_with_sine_wave_generator.txt · Last modified: 2014/12/18 23:17 by teamuptownfunk
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