2021-09-06 12:06:38 +02:00
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# RpiLedBars
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2021-05-01 17:48:48 +02:00
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LedBars version for raspberry pi
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2021-09-06 12:06:38 +02:00
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## Contains
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* a python test program (main.py)
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* a C program using :
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* ws2812 with dma/smi from Jeremy P Bentham - https://iosoft.blog/category/neopixel/
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* artnet from Stephan Ruloff - https://github.com/rstephan/ArtnetnodeWifi
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## Install
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2021-09-05 21:04:42 +02:00
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2021-09-06 12:06:38 +02:00
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### I2S Microphone
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#### Install dependencies
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~~~bash
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sudo apt install python3-pip
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sudo pip3 install --upgrade adafruit-python-shell
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~~~
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#### Build and install module
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~~~bash
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cd /tmp
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sudo wget https://raw.githubusercontent.com/adafruit/Raspberry-Pi-Installer-Scripts/master/i2smic.py
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sudo python3 i2smic.py
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~~~
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After a kernel update this step as to be executed again (after reboot -> depends on `uname`)
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#### Test microphone
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Plug the microphone
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~~~bash
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sudo reboot
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arecord -l
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arecord -D plughw:1 -c1 -r 48000 -f S32_LE -t wav -V mono -v file.wav
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~~~
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#### Control record volume
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~~~bash
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cp res/.asoundrc ~/.asoundrc
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~~~
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* Intall i2s mems microphone - https://learn.adafruit.com/adafruit-i2s-mems-microphone-breakout/raspberry-pi-wiring-test
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* Configuring alsa - https://makersportal.com/blog/recording-stereo-audio-on-a-raspberry-pi
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* Alsa API - http://www.equalarea.com/paul/alsa-audio.html
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### Project depenencies
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~~~bash
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sudo apt install libasound2-dev wiringpi
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~~~
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#### Cava
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~~~bash
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sudo apt install libfftw3-dev libasound2-dev libtool automake
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cd cava_
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./autogen.sh
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./configure
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make
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sudo make install
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~~~
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### Access point
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~~~bash
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grep "Access point conf" $(find /etc -type f)
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~~~
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2021-09-28 10:08:35 +02:00
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* https://learn.sparkfun.com/tutorials/setting-up-a-raspberry-pi-3-as-an-access-point/all
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## Biblio:
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### Art-Net
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* Protocol Spec :
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* https://art-net.org.uk/how-it-works/
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* https://artisticlicence.com/WebSiteMaster/User%20Guides/art-net.pdf
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* ESP32 library from Stephan Ruloff - https://github.com/rstephan/ArtnetnodeWifi
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2021-09-06 12:06:38 +02:00
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### ws28xx rgb leds
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* ws2812 datasheet - https://cdn-shop.adafruit.com/datasheets/WS2812.pdf
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* ws2815 datasheet - https://pdf1.alldatasheet.com/datasheet-pdf/view/1134588/WORLDSEMI/WS2815B.html
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* ws2812 with dma/smi from Jeremy P Bentham :
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* ws2812 - https://iosoft.blog/2020/09/29/raspberry-pi-multi-channel-ws2812/
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* dma - https://iosoft.blog/2020/05/25/raspberry-pi-dma-programming/
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* smi - https://iosoft.blog/2020/07/16/raspberry-pi-smi/
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