nearly feature-complete
Signed-off-by: Sean Cross <sean@xobs.io>
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@ -23,13 +23,14 @@ body {
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.reveal .footer {
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position: absolute;
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bottom: 1em;
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right: 2em;
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right: 4em;
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text-align: right;
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font-size: 0.5em;
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font-size: 0.75em;
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width: 100%;
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height: 96px;
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/*background-image: url("lca2019-logo.svg");*/
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background-image: url("teardown2019-logo.svg");
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background-repeat: no-repeat;
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background-position: right;
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display: flex;
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justify-content: flex-end;
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align-items: flex-end;
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79
index.html
79
index.html
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@ -81,8 +81,8 @@
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<div class="reveal">
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<div class="footer">
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<a class="url" href="https://p.xobs.io/td19/">p.xobs.io/td19</a>
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<span class="theme">Teardown 2019</span><span class="hashtag"> | #teardown2019</span><span class="twitter"> |
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@teardown</span>
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<span class="theme">Teardown 2019</span><span class="hashtag"> | #teardown</span><span class="twitter"> |
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@crowd_supply</span>
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</div>
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<div class="slides">
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<section>
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@ -93,7 +93,7 @@
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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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<section data-background-image="css/theme/teardown2019-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; a workshop in three levels</h4>
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<p align="right">
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@ -348,7 +348,12 @@
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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>Misleading Datasheets</h2>
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<img data-src="img/xtal-datasheet-icon.jpg" alt="Footprint from Crystal">
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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 (R7, PU)</li>
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@ -649,7 +654,73 @@ $ wishbone-tool --pid 0x5bf0 0x10000000
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Value at 10000000: 12345678
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$ </code></pre>
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</section>
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<section>
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<h2>Adding Hardware</h2>
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<img data-src="img/ice40-rgb.jpg" alt="Schematic of RGB block">
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</section>
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<section>
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<h2>Technology Library Reference</h2>
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<pre><code class="verilog">// Verilog Instantiation
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SB_RGBA_DRV RGBA_DRIVER (
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.CURREN(ENABLE_CURR),
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.RGBLEDEN(ENABLE_RGBDRV),
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.RGB0PWM(RGB0),
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.RGB1PWM(RGB1),
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.RGB2PWM(RGB2),
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.RGB0(LED0),
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.RGB1(LED1),
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.RGB2(LED2)
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);
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defparam RGBA_DRIVER.CURRENT_MODE = "0b0";
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defparam RGBA_DRIVER.RGB0_CURRENT = "0b111111";
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defparam RGBA_DRIVER.RGB1_CURRENT = "0b111111" ;
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defparam RGBA_DRIVER.RGB2_CURRENT = "0b111111";</code></pre>
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<p>SBTICETechnologyLibrary201504.pdf page 147</p>
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</section>
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<section>
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<h2>RGB Block</h2>
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<pre><code class="python" style="font-size: 18px; line-height: 22px">class FomuRGB(Module, AutoCSR):
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def __init__(self, pads):
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self.output = CSRStorage(3)
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self.specials += Instance("SB_RGBA_DRV",
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i_CURREN = 0b1,
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i_RGBLEDEN = 0b1,
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i_RGB0PWM = self.output.storage[0],
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i_RGB1PWM = self.output.storage[1],
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i_RGB2PWM = self.output.storage[2],
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o_RGB0 = pads.r,
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o_RGB1 = pads.g,
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o_RGB2 = pads.b,
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p_CURRENT_MODE = "0b1",
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p_RGB0_CURRENT = "0b000011",
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p_RGB1_CURRENT = "0b000011",
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p_RGB2_CURRENT = "0b000011",
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)</code></pre>
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</section>
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<section>
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<h2>Instantiating FomuRGB</h2>
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<pre><code class="diff">@@ -55,6 +75,10 @@ class BaseSoC(SoCCore):
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with_ctrl=False,
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**kwargs)
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+ # Add the LED driver block
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+ led_pads = platform.request("rgb_led")
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+ self.submodules.rgb = FomuRGB(led_pads)
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+
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# UP5K has single port RAM....
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# Use this as CPU RAM.
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spram_size = 128*1024</code></pre>
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</section>
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<section>
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<h2>Interacting with the CSR</h2>
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<pre><code>csr_register,rgb_output,0xe0006800,1,rw</code></pre>
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<p>From <code>test/csr.csv</code></p>
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</section>
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<section>
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<h2>VexRiscv</h2>
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</section>
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