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diff --git a/wirish/wirish_analog.cpp b/wirish/wirish_analog.cpp
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+/******************************************************************************
+ * The MIT License
+ *
+ * Copyright (c) 2010 Perry Hung.
+ * Copyright (c) 2011, 2012 LeafLabs, LLC.
+ *
+ * Permission is hereby granted, free of charge, to any person
+ * obtaining a copy of this software and associated documentation
+ * files (the "Software"), to deal in the Software without
+ * restriction, including without limitation the rights to use, copy,
+ * modify, merge, publish, distribute, sublicense, and/or sell copies
+ * of the Software, and to permit persons to whom the Software is
+ * furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be
+ * included in all copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
+ * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
+ * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
+ * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS
+ * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
+ * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
+ * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+ * SOFTWARE.
+ *****************************************************************************/
+
+/**
+ * @file wirish/wirish_analog.cpp
+ * @brief Wiring-style analogRead() implementation.
+ */
+
+#include <wirish/io.h>
+#include <libmaple/adc.h>
+#include <wirish/boards.h>
+
+/* Unlike Wiring and Arduino, this assumes that the pin's mode is set
+ * to INPUT_ANALOG. That's faster, but it does require some extra work
+ * on the user's part. Not too much, we think ;). */
+uint16 analogRead(uint8 pin) {
+    const adc_dev *dev = PIN_MAP[pin].adc_device;
+    if (dev == NULL) {
+        return 0;
+    }
+
+    return adc_read(dev, PIN_MAP[pin].adc_channel);
+}