index: finish up to the end of risc-v

Signed-off-by: Sean Cross <sean@xobs.io>

index.html

@@ -183,11 +183,12 @@
 				<section>
 					<h2>What is Fomu?</h2>
 					<ul>
-						<li>ICE40UP5K in your USB port</li>
+						<li>ICE40UP5K</li>
 						<li>2MB flash memory</li>
 						<li>Four edge-plated pads</li>
 						<li>ESD protection</li>
 						<li>USB implemented in HDL</li>
+						<li class="fragment highlight-blue">Fits in your USB port</li>
 					</ul>
 					<!-- <p>
 						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.
@@ -235,6 +236,7 @@
 
 				<section>
 					<h2>Fomu Block Design Diagram</h2>
+					<img data-src="img/fomu-block-diagram.png" alt="Fomu block diagram">
 				</section>
 
 				<section>
@@ -335,19 +337,48 @@ $ dfu-util -D new-image.dfu    # Load new program</code></pre>
 				</section>
 
 				<section>
-					<h2>LiteX Machine Model</h2>
+					<h2>LiteX Model</h2>
-				</section>
+					<img data-src="img/litex-design.png" alt="LiteX Design">
-
-				<section>
-					<h2>Wishbone Interface</h2>
 				</section>
 
 				<section>
 					<h2>Wishbone Bridge</h2>
+					<img data-src="img/wishbone-usb-debug-bridge.png" alt="Wishbone bridge">
+				</section>
+
+				<section>
+					<h2>CSR Access</h2>
+					<pre><code class="cpp">#define CSR_VERSION_MAJOR_ADDR 0xe0007000L
+#define CSR_VERSION_MAJOR_SIZE 1
+#define CSR_VERSION_MINOR_ADDR 0xe0007004L
+#define CSR_VERSION_MINOR_SIZE 1
+#define CSR_VERSION_REVISION_ADDR 0xe0007008L
+#define CSR_VERSION_REVISION_SIZE 1
+#define CSR_VERSION_GITREV_ADDR 0xe000700cL
+#define CSR_VERSION_GITREV_SIZE 4
+#define CSR_VERSION_GITEXTRA_ADDR 0xe000701cL
+#define CSR_VERSION_GITEXTRA_SIZE 2
+</code></pre>
+Excerpt from <code>csr.h</code>
+				</section>
+
+				<section>
+					<h2>Reading CPU Version</h2>
+					<pre><code class="sh">$ wishbone-tool --pid 0x5bf0 0xe0007000
+Value at e0007000: 00000001
+$ wishbone-tool --pid 0x5bf0 0xe0007004
+Value at e0007004: 00000008
+$ wishbone-tool --pid 0x5bf0 0xe0007008
+Value at e0007008: 00000001</code></pre>
 				</section>
 
 				<section>
 					<h2>Interacting with LEDD directly</h2>
+					<img data-src="img/ice40-ledd.png" alt="ICE40 LEDD registers">
+					<pre class="fragment"><code class="cpp">#define CSR_RGB_DAT_ADDR 0xe0006800L
+#define CSR_RGB_ADDR_ADDR 0xe0006804L</code></pre>
+					<pre class="fragment"><code>$ wishbone-tool --pid 0x5bf0 0xe0006804 1
+$ wishbone-tool --pid 0x5bf0 0xe0006800 0xff</code></pre>
 				</section>
 
 				<section>