Instructions for installation and usage in README

README.md

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+# fread.ink print screen tool
+
+A tool for printing text and graphics to the eink display. The image data is printed directly to the display's framebuffer.
+
+## Installation
+
+1. Download the `fips` executable from the [latest release](https://github.com/fread-ink/fread-fips/releases/latest). It is compiled for the fread.ink firmware.
+1. Copy the `fips` executable to the device, e.g. via [USB networking](https://github.com/fread-ink/fread-vagrant#enabling-usb-networking).
+
+## Usage
+
+### Display an image
+
+`./fips -g image_path [-f]`
+
+where:
+- _-g_ is the parameter for displaying a PNG image
+- _image_path_ is the path to the image's file
+- _-f_ is an optional parameter for making a full update of the display, the default is partial update
+
+### Clear the display
+
+`./fips -c`
+
+where:
+- _-c_ is the parameter for clearing the display