add arduino nano stdin driver

1 files changed, 32 insertions, 0 deletions

diff --git a/src/arch/arduino-nano/driver/stdin.cc b/src/arch/arduino-nano/driver/stdin.cc
new file mode 100644
index 0000000..ac58a61
--- /dev/null
+++ b/src/arch/arduino-nano/driver/stdin.cc
@@ -0,0 +1,32 @@
+#include "driver/stdin.h"
+#include <avr/io.h>
+#include <avr/interrupt.h>
+
+void StandardInput::setup()
+{
+	UCSR0B |= _BV(RXCIE0);
+}
+
+bool StandardInput::hasKey()
+{
+	if (write_pos != read_pos) {
+		return true;
+	}
+	return false;
+}
+
+char StandardInput::getKey()
+{
+	char ret = buffer[read_pos++];
+	read_pos %= 8;
+	return ret;
+}
+
+StandardInput kin;
+
+ISR(USART_RX_vect)
+{
+	while (UCSR0A & _BV(RXC0)) {
+		kin.addKey(UDR0);
+	}
+}