Add AVR (Arduino Nano) support

3 files changed, 59 insertions, 0 deletions

diff --git a/src/arch/arduino-nano/driver/gpio.cc b/src/arch/arduino-nano/driver/gpio.cc
new file mode 100644
index 0000000..66e24db
--- /dev/null
+++ b/src/arch/arduino-nano/driver/gpio.cc
@@ -0,0 +1,24 @@
+#include "driver/gpio.h"
+#include <avr/io.h>
+
+void GPIO::setup()
+{
+	DDRB = _BV(PB5);
+}
+
+void GPIO::led_on(unsigned char id)
+{
+	PORTB |= _BV(PB5);
+}
+
+void GPIO::led_off(unsigned char id)
+{
+	PORTB &= ~_BV(PB5);
+}
+
+void GPIO::led_toggle(unsigned char id)
+{
+	PINB = _BV(PB5);
+}
+
+GPIO gpio;
diff --git a/src/arch/arduino-nano/driver/stdout.cc b/src/arch/arduino-nano/driver/stdout.cc
new file mode 100644
index 0000000..a3d905d
--- /dev/null
+++ b/src/arch/arduino-nano/driver/stdout.cc
@@ -0,0 +1,32 @@
+#include "driver/stdout.h"
+#include <avr/io.h>
+#include <avr/interrupt.h>
+
+#define BAUD 119200L
+#include <util/setbaud.h>
+
+void StandardOutput::setup()
+{
+	UBRR0H = UBRRH_VALUE;
+	UBRR0L = UBRRL_VALUE;
+
+#if USE_2X
+	UCSR0A |= _BV(U2X0);
+#else
+	UCSR0A &= ~_BV(U2X0);
+#endif
+
+	UCSR0B |= _BV(RXEN0) | _BV(TXEN0);
+	UCSR0C = _BV(UCSZ01) | _BV(UCSZ00);
+}
+
+void StandardOutput::put(char c)
+{
+	while (!(UCSR0A & _BV(UDRE0)));
+	UDR0 = c;
+	if (c == '\n') {
+		put('\r');
+	}
+}
+
+StandardOutput kout;
diff --git a/src/arch/arduino-nano/driver/uptime.cc b/src/arch/arduino-nano/driver/uptime.cc
new file mode 100644
index 0000000..388edb6
--- /dev/null
+++ b/src/arch/arduino-nano/driver/uptime.cc
@@ -0,0 +1,3 @@
+#include "driver/uptime.h"
+
+Uptime uptime;