From f7f02b76a85c9b3912783c12f8123c5ce2e6fbed Mon Sep 17 00:00:00 2001
From: BlackMark <me@blackmark.me>
Date: Sun, 9 Feb 2020 20:36:25 +0100
Subject: [PATCH] Added compile time check to verify pin supports ADC

---
 adc.hpp      |  2 ++
 hardware.hpp | 10 +++++++++-
 2 files changed, 11 insertions(+), 1 deletion(-)

diff --git a/adc.hpp b/adc.hpp
index 23598c6..e181563 100644
--- a/adc.hpp
+++ b/adc.hpp
@@ -13,6 +13,8 @@ struct Config {
 template <typename Cfg, io::P pin>
 class Adc {
   public:
+	static_assert(detail::supports_adc_v<pin>, "Pin does not support ADC");
+
 	void read() {}
 
   private:
diff --git a/hardware.hpp b/hardware.hpp
index 5cba31d..0b67e2a 100644
--- a/hardware.hpp
+++ b/hardware.hpp
@@ -2,7 +2,7 @@
 
 #include <stdint.h>
 
-#include <avr/io.h>
+#include "../io/io.hpp"
 
 namespace adc {
 
@@ -70,6 +70,14 @@ enum class ControlFlagsDigInDis {
 	DIGITAL_INPUT_DISABLE_5 = ADC5D,
 };
 
+template <io::P pin>
+struct supports_adc {
+	static constexpr auto value = (io::detail::getBus(pin) == io::Bus::C) ? true : false;
+};
+
+template <io::P pin>
+constexpr auto supports_adc_v = supports_adc<pin>::value;
+
 #pragma pop_macro("_MMIO_BYTE")
 
 #else