54 Multiple Tunes on A Piezo Speaker

54 : Multiple Tunes on A Piezo Speaker

  • Author: Jiaxun Yang
  • Description: Plays multiple Tunes over a Piezo Speaker connected across io_out[1:0]
  • GitHub repository
  • Most recent GDS build
  • HDL project
  • Extra docs
  • Clock: 10000 Hz
  • External hardware: Piezo speaker connected across io_out[1:0]

How it works

Converts an RTTL ringtone into verilog using Python - and plays it back using differential PWM modulation

How to test

Provide 10kHz clock on io_in[0], briefly hit reset io_in[1] (L->H->L) and io_out[1:0] will play a differential sound wave over piezo speaker, different tunes can be selected by different tune_sel inputs


# Input Output
0 clock piezo_speaker_p
1 reset piezo_speaker_n
2 tune_sel0 ledout_0
3 tune_sel1 ledout_1
4 none ledout_2
5 none ledout_3
6 none none
7 none none