2021-08-24 23:33:40 -06:00
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# Preparing the Operating System for UPIWIN
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The Raspberry Pi OS needs to be configured with the appropriate device tree support, software, and libraries to compile
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and run UPIWIN successfully. This document describes the process.
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## Preparing the Operating System
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1. Download an image of Raspberry Pi OS from
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[the Raspberry Pi Foundation](https://downloads.raspberrypi.org/raspios_armhf/images/). The most-recent version of
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Raspberry Pi OS that is known to work with the PiTFT is
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[the December 4, 2020 image](https://downloads.raspberrypi.org/raspios_armhf/images/raspios_armhf-2020-12-04/).
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2. Unzip the `.zip` file for your image and write th included `.img` file to a fresh MicroSD card using one of the
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methods described on [this page](https://www.raspberrypi.org/documentation/computers/getting-started.html).
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3. Connect your UPIWIN-compatible Raspberry Pi (RPi 3B+ with PiTFT) to power, HDMI display, keyboard, and network
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(if necessary). Insert the freshly-written MicroSD card into the Pi.
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4. Turn on the Pi, boot into Raspberry Pi OS, and set it up. Make sure to get updates installed.
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## Installing the PiTFT Drivers
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1. In a terminal window, enter the command `sudo -i` to get a root command prompt.
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2. Enter the following commands:
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pip3 install --upgrade adafruit-python-shell click
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git clone https://github.com/adafruit/Raspberry-Pi-Installer-Scripts.git
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cd Raspberry-Pi-Installer-Scripts
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python3 adafruit-pitft.py --display=28c --rotation=90
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3. Answer "N" to the questions about the console appearing on the PiTFT display and mirroring HDMI to the PiTFT
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display.
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4. Reboot the Pi when prompted.
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## Installing Libraries for UPIWIN
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1. Use `sudo -i` to get a root command prompt.
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2. Execute the command to install packaged libraries:
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apt install python3-dev libfreetype6-dev libpng-dev ttf-mscorefonts-installer
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3. Execute the commands to install the BCM2835 library:
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wget http://www.airspayce.com/mikem/bcm2835/bcm2835-1.68.tar.gz
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tar xzvf bcm2835-1.68.tar.gz
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cd bcm2835-1.68
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./configure
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make
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make check
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make install
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4. Copy the Arial font to where the code expects to see it:
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mkdir /usr/local/share/fonts/truetype
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cp /usr/share/fonts/truetype/msttcorefonts/arial.ttf /usr/local/share/fonts/truetype
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## Building the Source
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After cloning the repository for UPIWIN, enter the following commands:
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cd upiwin
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make
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2021-08-29 16:42:21 -06:00
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The resulting executable and demo scripts will be placed into the `output` directory.
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To execute, change to the `output` directory and enter the command `sudo ./upiwin` followed by the name of the script
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to be run. For example, `sudo ./upiwin demo1.py`.
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