Controlling the GPIO pins and an analog digital converter (MCP3008) in Pure Data on a Raspberry Pi.

Wiring for the Raspberry Pi was written by Gordon Henderson.
WiringPi for Pure Data was written by Miller Puckettte, Jaime Oliver La Rosa and Jeremiah Rose.
This is a workaround for installing the WiringPi object and using the analog digital converter MCP3008 for analog inputs in Pure Data on a Raspberry Pi 4 with Raspbian Buster.

---

In the terminal:

 $ sudo apt update
 $ sudo apt install puredata

In the terminal:

 $ sudo apt-get install wiringpi

For the Raspberry Pi 4 one needs to update the WiringPi to version 2.52:

 $ cd /tmp
 $ wget https://project-downloads.drogon.net/wiringpi-latest.deb
 $ sudo dpkg -i wiringpi-latest.

http://wiringpi.com/wiringpi-updated-to-2-52-for-the-raspberry-pi-4b/

Download: pd-wiringpi.zip
Unzip and copy the wiringPi_gpio and the wiringPi_mcp3008 folder in the PD external folder.
/home/pi/Documents/PD/externals
In Pure Data → Preferences → Path set the path to these two folders.

The Wiring library has its own pin labeling:
Wiring Pins.pdf
On Sparkfun one found a good pin labeling, too:
}}\\ Open the wiringPi_gpio-help.pd file and have fun with the GPIOs!\\ === WiringPi and the MCP 3008 === {{:puredata:raspberrypi_mcp3008.jpg?600|}}\\ For the hardware wiring of the 10 bit analog to digital converter MCP 3008 connect the pins of the MCP3008 like that:\\ {{:puredata:sensors_raspberry_pi_mcp3008pin.gif?200|}}\\ MCP3008 Raspberry Pi VDD 3.3V VREF 3.3V AGND GND DGND GND CLK SCLK DOUT MISO DIN MOSI CS/SHDN CE0 {{:puredata:gpio-pinout-diagram-2.png?400|}}\\ Before using the Wiring object enable the SPI interface in: $ sudo raspi-config Open PD as administrator (sudo pd) and then open the wiring_mcp3008-help.pd file. After clicking on setup_wiringPi the analog inputs should work.\\ {{:puredata:pd_wiringpi_mcp3008-help_jan2020.png?|}}\\ ---- ==== Links ==== [[https://puredata.info/
http://wiringpi.com/
https://github.com/jeremiahrose/pd-wiringpi
http://pi.bek.no/pd_wiringPi_GPIO/
https://learn.adafruit.com/raspberry-pi-analog-to-digital-converters/mcp3008
https://www.raspberrypi.org/documentation/usage/gpio/

---