Refactor pins to be user-provided

eink.hpp

@@ -7,14 +7,14 @@
 #include "../clock.hpp"
 #include "../io/io.hpp"
 
-template <typename Spi>
+template <typename Spi, io::P RstPin, io::P DcPin, io::P BusyPin>
 class Epd {
 	static constexpr auto width = uint16_t{200};
 	static constexpr auto height = uint16_t{200};
 
-	io::Pin<io::P::C1> m_rst;
-	io::Pin<io::P::C0> m_dc;
-	io::Pin<io::P::C2> m_bsy;
+	io::Pin<RstPin> m_rst;
+	io::Pin<DcPin> m_dc;
+	io::Pin<BusyPin> m_bsy;
 
   public:
 	Epd() = default;