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65 lines
2.8 KiB
Markdown
65 lines
2.8 KiB
Markdown
LED
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===
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This is the verilog pendant to a "Hello World" for the MIST FPGA
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board.
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This code lets the "Core LED" on the board blink once a second.
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This example was published as part of the first article in a series
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of three in the german computer magazine c't:
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http://www.heise.de/ct/ausgabe/2015-21-Mit-FPGAs-Retro-Chips-implementieren-Teil-1-2811231.html
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Getting started
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---------------
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This example can be used under Windows as well as under Linux.
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First of all you need to download the quartus web edition for your operating
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system from https://dl.altera.com/?edition=web Please make sure you download
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vesion 13.1 as newer versions don't support the Cyclone III FPGA anymore.
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To install & run Quartus 13.1 on a modern (64 bits) distribution, you will need to
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install 32 bits versions of the following libraries:
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libc6, libstdc++6, libx11-6, libxext6, libxau6, libxdmcp6, libfreetype6, libfontconfig1,
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libexpat1, libxrender1, libsm6. For example, on Ubuntu, enter this in a terminal:
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```
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$ sudo apt install libc6:i386 libstdc++6:i386 libx11-6:i386 libxext6:i386 libxau6:i386 libxdmcp6:i386 libfreetype6:i386 libfontconfig1:i386 libexpat1:i386 libxrender1:i386 libsm6:i386
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```
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libpng12 is also needed but not available anymore. On Ubuntu, you can get it here instead:
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- 32bit: https://packages.ubuntu.com/xenial/i386/libpng12-0/download
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- 64bit: https://packages.ubuntu.com/xenial/amd64/libpng12-0/download
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Finally, the setup.sh file for Quartus 13.1 shall be run with:
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```
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$ bash setup.sh
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```
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Quartus itself can be run with the command (omit --64bit for the 32bit version):
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```
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$ ~/altera/13.1/quartus/bin/quartus --64bit
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```
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Once installed Quartus will allow you to import the [led.qar](https://github.com/mist-devel/mist-board/raw/master/tutorials/led/led.qar) archive. Use the qar import by selecting "Restore Archived Project..." from the "Project" menu.
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Selecting "Start Compilation" from the "Processing" menu will create the led.rbf
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file. Putting this under the name "core.rbf" on sd card and booting the
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mist from that card should result in the FPGA led blinking once a second.
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Using signaltap
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---------------
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Signaltap is a very useful tool when developing cores. It allows you to observe
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signals directly on the running FPGA.
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You need a cheap usb blaster cable to use this feature. Searching for "usb blaster"
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on ebay or amazon should give plenty of matching results.
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The blaster cable is connected to the PC via USB. For more information see the
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[Wiki](https://github.com/mist-devel/mist-board/wiki/UsingAByteBlaster). You also
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need to add a matching connector to your MIST board. Althoug the board is prepared
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for this connector you still need to get it soldered to the board.
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