atmega2560: add stdin driver

1 files changed, 30 insertions, 0 deletions

diff --git a/include/arch/atmega2560/driver/stdin.h b/include/arch/atmega2560/driver/stdin.h
new file mode 100644
index 0000000..9a99b00
--- /dev/null
+++ b/include/arch/atmega2560/driver/stdin.h
@@ -0,0 +1,30 @@
+/*
+ * Copyright 2021 Daniel Friesel
+ *
+ * SPDX-License-Identifier: BSD-2-Clause
+ */
+#ifndef STANDARDINPUT_H
+#define STANDARDINPUT_H
+
+class StandardInput {
+	private:
+		StandardInput(const StandardInput &copy);
+		static unsigned char const bufsize = 16;
+		char buffer[bufsize];
+		unsigned char write_pos, read_pos;
+
+	public:
+		StandardInput() : write_pos(0), read_pos(0) {}
+		void setup();
+		bool hasKey();
+		char getKey();
+
+		inline void addKey(char key) {
+			buffer[write_pos] = key;
+			write_pos = (write_pos + 1) % bufsize;
+		}
+};
+
+extern StandardInput kin;
+
+#endif