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features.php

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+<?php $curpage = basename(__FILE__); require '_header.php'; ?>
+
+<section>
+	<div>
+		<h1>Features</h1>
+
+		<p>
+			The project started as a STM32 alternative to BusPirate, offering access to the many
+			hardware peripherals of STM32 microcontrollers. The firmware is modular, composed of
+			functional blocks (“units”) that may be activated and configured by the user through
+			INI configuration files. Those files are stored inside the module and edited
+			programmatically, or with a text editor on a virtual FAT16 USB disk.
+		</p>
+
+		<p>
+			GEX is used as a GPIO header for the PC, except besides GPIO it also supports a range
+			of hardware buses, and several analog features. The device is configured for a particular
+			hardware setup, but the control script runs on the host PC. This lets you build graphical
+			applications above the low level control code with PyQt or other toolkits, process
+			data with NumPy or SciPy, and more. When needed, the Python library may be called from
+			within MATLAB, too.
+		</p>
+
+		<h2>Connection</h2>
+
+		<p>
+			GEX can be connected through USB (CDC/ACM - virtual COM port), by a hardware UART, or
+			wirelessly, using a nRF24L01+ transceiver module.
+		</p>
+
+		<h2>Hardware Functions</h2>
+
+		<p>
+			The firmware version 1.0 for STM32F072 contains the following key features:
+		</p>
+
+		<ul>
+			<li>Direct GPIO pin access
+			<li>SPI master
+			<li>I²C master
+			<li>UART/USART
+			<li>1-Wire master (including the search algorithm)
+			<li>PWM output
+			<li>Frequency and duty cycle measurement
+			<li>ADC with oscilloscope-like features
+			<li>DAC (analog output) with waveform generation based on DDS
+		</ul>
+
+		<p>
+			Some features (specifically the analog ones) are experimental and exhibit various
+			limitations. These will be addressed in a later firmware version, possibly as a full
+			rewrite.
+		</p>
+	</div>
+</section>
+
+<?php require '_footer.php'; ?>
+