add initial python section
Signed-off-by: Sean Cross <sean@xobs.io>
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index.html
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@ -89,43 +89,37 @@
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<h2>Fomu: an FPGA in your USB Port</h2>
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<img src="img/tomu-fomu-case-superwide.jpg">
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<p>
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Fomu (with case): an FPGA in your USB port. Crowdfunding now! One week to go. <a href="https://t.xobs.io/fomu">t.xobs.io/fomu</a>
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Pre-order now on Crowd Supply! <a href="https://t.xobs.io/fomu">t.xobs.io/fomu</a>
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</p>
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</section>
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<section data-background-image="css/theme/lca2019-title-bg-transparent.svg">
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<h1>Fomu: An FPGA in your USB Port</h1>
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<h4>A whirlwind introduction to Fomu and FPGAs</h4>
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<h4>A whirlwind introduction to Fomu; a workshop in three levels</h4>
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<p align="right">
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<small>Sean Cross - <a href="https://xobs.io/">https://xobs.io/</a> - @xobs</small>
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</p>
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</section>
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<section>
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<h3>Outline</h3>
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<h2>Levels of Fomu</h2>
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<p>
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Fomu aims to be accessable on three levels:
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<ol>
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<li>Fomu Firmware Layout</li>
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<li>
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<ol>
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<li>Bootloader</li>
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<li>Recovery</li>
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<li>Magic constants</li>
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<li>Interpreters</li>
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<li>Updates</li>
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</ol>
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</li>
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<li>Loading firmware onto Fomu</li>
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<li>Blinkenlights</li>
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<li>Python / Interpreted</li>
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<li>RISC-V</li>
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<li>Verilog / FPGA</li>
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</ol>
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</p>
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</section>
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<section>
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<h2>Workshop Outline</h2>
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<ol>
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<li>What do I need to get started?</li>
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<li>What is Fomu, and what is an FPGA?</li>
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<li>What can I do with Fomu?</li>
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<li>What is an FPGA, and what is Fomu?</li>
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<li>What makes Fomu special?</li>
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<li>What can I do with Fomu?</li>
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</ol>
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</section>
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@ -133,9 +127,13 @@
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<section>
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<h2>What do I need to get started?</h2>
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<ol>
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<li>DFU utilities</li>
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<li>Serial console</li>
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<li>RISC-V toolchain</li>
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<li>Synthesis</li>
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<li>Place-and-Route</li>
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<li>Packer</li>
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<li>Python 3</li>
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</ol>
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</section>
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</section>
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@ -143,34 +141,65 @@
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<section>
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<section>
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<h2>What is an FPGA?</h2>
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<img data-src="img/ice40-lut.png" alt="SB_LUT4">
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<!--
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<p>
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An FPGA is like a hardware emulator. It can change itself so that it can take on the characteristics of any other digital logic.
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An FPGA is a chip that executes logic.
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</p>
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<p>
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FPGAs are measured in resources called LUTs or LCs.
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</p>
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-->
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</section>
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<section>
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<h2>What is an FPGA?</h2>
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<pre><code class="verilog" data-trim>
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module DFF (output reg Q, input C, D, R);
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always @(posedge C)
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if (~R) begin
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Q <= 1'b0;
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end else begin
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Q <= D;
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end
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endmodule
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</code></pre>
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</section>
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<section>
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<h2>About the ICE40UP5K</h2>
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<ol>
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<li>5280 4-input LUTs (LC)</li>
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<li>16 kilobytes BRAM</li>
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<li class="fragment highlight-blue">128 kilobytes "SPRAM"</li>
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<li>Current-limited 3-channel LED</li>
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<li>2x I2C and 2x SPI</li>
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<li>8 16-bit DSP units</li>
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<li>Warmboot capability</li>
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</ol>
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</section>
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<section>
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<h2>What is Fomu?</h2>
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<p>
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<ul>
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<li>ICE40UP5K in your USB port</li>
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<li>2MB flash memory</li>
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<li>Four edge-plated pads</li>
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<li>ESD protection</li>
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<li>USB implemented in HDL</li>
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</ul>
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<!-- <p>
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Fomu is an FPGA that fits in your USB port. It has foru buttons, 2 MB of SPI flash, an RGB LED, and an ICE40UP5K with 5280 LCs. It also has 128 kB of dedicated RAM, not counting the block RAM.
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Unlike many other PCBs, Fomu does not have a separate USB controller chip. This means that any projects that want to use the USB port must include a USB softcore.
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</p>
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</section>
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<section>
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<h2>Fomu Block Design Diagram</h2>
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</section>
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<section>
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<h2>ICE40 Features</h2>
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</p> -->
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</section>
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<section>
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<h2>What is this PCB?</h2>
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<p>
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<img data-src="img/tomu-fpga-evt-1-small.jpg" alt="Fomu EVT1">
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<h3>Fomu EVT1</h3>
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<!-- <p>
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This is Fomu EVT1. This is the original stretch prototype of Fomu. The schematics are the same, but much has changed:
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* Name changed from Tomu-FPGA to Fomu
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@ -189,19 +218,35 @@
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* Populate Raspberry Pi header
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* Add PMOD pins to touchpads
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* Swap PMODa pins for I3C
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</p>
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</p> -->
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</section>
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<section>
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<h2>What modifications does it have?</h2>
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<ul>
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<li>Shorting out two zero-ohm resistors</li>
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<li>Shorting out two zero-ohm resistors (R7, PU)</li>
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<li>Programming SPI flash</li>
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<li>Bending SPI flash pins inward</li>
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<li>Mounting crystal on its side</li>
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<li>Bending SPI flash pins inward (U4)</li>
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<li>Mounting crystal on its side (U7)</li>
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<li>Attaching power to crystal</li>
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</ul>
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</section>
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<section>
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<h2>Fomu Block Design Diagram</h2>
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</section>
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<section>
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<h2>Fomu SPI Flash Layout</h2>
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<img data-src="img/fomu-memory-layout.png" alt="Fomu memory layout">
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<!-- <ol>
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<li>Bootloader</li>
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<li>Recovery</li>
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<li>Magic constants</li>
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<li>Interpreters</li>
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<li>Updates</li>
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</ol> -->
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</section>
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</section>
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<section>
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@ -214,70 +259,17 @@
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</section>
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<section>
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<h2>Updating Fomu</h2>
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<code>
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sean@PAZUZU ~\Code\Fomu\foboot\releases\v1.8.1 master ≢ [10:45]
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❯ dfu-util -l
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dfu-util 0.9
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Copyright 2005-2009 Weston Schmidt, Harald Welte and OpenMoko Inc.
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Copyright 2010-2016 Tormod Volden and Stefan Schmidt
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This program is Free Software and has ABSOLUTELY NO WARRANTY
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Please report bugs to http://sourceforge.net/p/dfu-util/tickets/
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Found DFU: [1209:5bf0] ver=0101, devnum=16, cfg=1, intf=0, path="1-1.1.2", alt=0, name="Fomu DFU Bootloader v1.7.2", serial="UNKNOWN"
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sean@PAZUZU ~\Code\Fomu\foboot\releases\v1.8.1 master ≢ [10:45]
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❯ dfu-util -D .\pvt-installable.dfu
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dfu-util 0.9
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Copyright 2005-2009 Weston Schmidt, Harald Welte and OpenMoko Inc.
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Copyright 2010-2016 Tormod Volden and Stefan Schmidt
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This program is Free Software and has ABSOLUTELY NO WARRANTY
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Please report bugs to http://sourceforge.net/p/dfu-util/tickets/
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Match vendor ID from file: 1209
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Match product ID from file: 5bf0
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Opening DFU capable USB device...
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ID 1209:5bf0
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Run-time device DFU version 0101
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Claiming USB DFU Interface...
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Setting Alternate Setting #0 ...
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Determining device status: state = dfuIDLE, status = 0
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dfuIDLE, continuing
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DFU mode device DFU version 0101
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Device returned transfer size 1024
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Copying data from PC to DFU device
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<pre><code>$ dfu-util -l
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Found DFU: [1209:5bf0] name="Fomu DFU Bootloader v1.7.2"
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$ dfu-util -D evt-installable.dfu
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Download [========= ] 36% 38912 bytes
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Download done.
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state(7) = dfuMANIFEST, status(0) = No error condition is present
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state(8) = dfuMANIFEST-WAIT-RESET, status(0) = No error condition is present
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Done!
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sean@PAZUZU ~\Code\Fomu\foboot\releases\v1.8.1 master ≢ [10:45]
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❯ dfu-util -l
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dfu-util 0.9
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Copyright 2005-2009 Weston Schmidt, Harald Welte and OpenMoko Inc.
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Copyright 2010-2016 Tormod Volden and Stefan Schmidt
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This program is Free Software and has ABSOLUTELY NO WARRANTY
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Please report bugs to http://sourceforge.net/p/dfu-util/tickets/
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Found DFU: [1209:5bf0] ver=0101, devnum=14, cfg=1, intf=0, path="1-1.1.2", alt=0, name="Fomu DFU Bootloader v1.8.1", serial="UNKNOWN"
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sean@PAZUZU ~\Code\Fomu\foboot\releases\v1.8.1 master ≢ [10:47]
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❯
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</code>
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$ dfu-util -l
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Found DFU: [1209:5bf0] name="Fomu DFU Bootloader v1.8.1"
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$</code></pre>
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</section>
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</section>
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<section>
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<h2>Levels of Fomu</h2>
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<p>
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Fomu aims to be accessable on three levels:
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<ol>
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<li>Python / Interpreted</li>
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<li>RISC-V</li>
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<li>Verilog / FPGA</li>
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</ol>
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</p>
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</section>
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<section>
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<section>
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<h2>Python / Interpreted</h2>
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@ -289,25 +281,46 @@ sean@PAZUZU ~\Code\Fomu\foboot\releases\v1.8.1 master ≢
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<section>
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<h2>Loading Programs onto Fomu</h2>
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<code>dfu-util -l</code>
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<code>dfu-util -D update.bin</code>
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<pre><code>
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$ dfu-util -l
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Found DFU: [1209:5bf0] name="Fomu DFU Bootloader v1.8.1"
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$ dfu-util -e # Boot current program
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$ dfu-util -D new-image.dfu # Load new program</code></pre>
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<h3 class="fragment">u<code>5b f0</code>mu</h3>
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</section>
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<section>
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<h2>Loading MicroPython</h2>
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<code>dfu-util -D micropython.dfu</code>
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<pre><code>$ dfu-util -D micropython-fomu.dfu</code></pre>
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</section>
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<section>
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<h2>Connecting via serial</h2>
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<pre class="fragment"><code>screen /dev/cu.usbserial*</code></pre>
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<pre class="fragment"><code>screen /dev/ttyACM*</code></pre>
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<pre class="fragment"><code>Teraterm</code></pre>
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<pre class="fragment"><code>MicroPython v1.10-296-g0a5a77a on 2019-06-18; fomu with vexriscv
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>>></code></pre>
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</section>
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<section>
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<h2>Interacting with Fomu</h2>
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<pre><code class="python" data-trim>
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>>> import fomu
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>>> rgb = fomu.rgb()
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>>> rgb.mode("error")
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>>>
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</code></pre>
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</section>
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<section>
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<h2>RGB LEDD reference</h2>
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<img data-src="img/ice40-ledd.png" alt="ICE40 LEDD registers">
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<pre class="fragment"><code class="python" data-trim>>>> rgb.write_raw(0b0001, 255)
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>>> rgb.write_raw(0b1010, 14)
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>>> rgb.write_raw(0b1011, 1)
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>>>
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</code></pre>
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</section>
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<section>
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