Awesome

Introduction

This contains the example code to be used with the Silicon Frog fpga-384.

Using the code

To compile on the Raspberry Pi: $ cd Blink $ make $ ./fpga-384 fpga.bin

To compile for Arduino: $ cd Blink $ make

Then open the resulting project in the Arduino IDE or if you took the option to install Arduino-mk you can run "make upload".

Projects

Blink

The simplest example with flashing LEDs.

PWM

Fading the LED brightness using PWM.

Gates

The host will clock the FPGA running through a set of logic gates (AND, OR, XOR, NOT) and the LEDs will show the result of them.

The gate type is chosen dependent upon a bit pattern selection, and the output is the logical gate application of the input.

Input logic A & B are red and green, result C is blue.

Adder

The host will clock the FPGA running through a simple one bit full adder taking in a single bit and a carry bit and will produce the result bit and a new carry bit.

Resulting bit and carry bit are shown on the leds.

Parity

The host will clock the FPGA running through a sequence where four bits are used as an input to find the even parity.

The resulting parity bit is shown on an led.

Rand

The FPGA will provide a running Pseudo Random Number Generator of the Linear Feedback Shift Register type.

A single bit is shown on an led which should flash with an unpredictable pattern.

Pattern

Shows the application of an internal state machine. A binary pattern is fed into an input which changes the internal state. The green LED lights when the full pattern is correctly received.

BCD

This shows Binary Coded Decimal logic.

Decoder

Shows how to generate specific binary output, given a binary input. Can be used to create a 3-8 decoder, for example.

I2C

Shows how to create a device with a specified I2C address.

Serial

Implements a low speed serial encoder / decoder. The serial port should work well at 9600 baud.

Notes for Raspberry Pi: You may need to configure the relevant IO pins to be the serial lines. $ sudo raspi-config You will find the menu under the 'interfacing options' / 'serial'. Also, the test application neds to be run with sudo.

Licensing

See the LICENSE.txt file for more details.