ao-bringup-avr: Add very primitive 'blink' to toggle the 32u4 B7 line

This should permit basic testing of the chip.

Signed-off-by: Keith Packard <keithp@keithp.com>

1 files changed, 37 insertions, 0 deletions

diff --git a/ao-bringup-avr/ao-blink.c b/ao-bringup-avr/ao-blink.c
new file mode 100644
index 00000000..b131d492
--- /dev/null
+++ b/ao-bringup-avr/ao-blink.c
@@ -0,0 +1,37 @@
+/*
+ * Copyright © 2011 Keith Packard <keithp@keithp.com>
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; version 2 of the License.
+ *
+ * This program is distributed in the hope that it will be useful, but
+ * WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+ * General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License along
+ * with this program; if not, write to the Free Software Foundation, Inc.,
+ * 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA.
+ */
+
+#include <avr/io.h>
+#define F_CPU 16000000UL	// 16 MHz
+#include <util/delay.h>
+
+#define LEDOUT		PORTB7
+#define LEDPORT		PORTB
+#define LEDDDR		DDRB
+#define LEDDDRPIN	DD6
+
+int main(void)
+{
+	LEDDDR |= (1 << LEDDDRPIN);
+
+	while (1) {
+		LEDPORT |= (1 << LEDOUT);
+		_delay_ms(200);
+		LEDPORT &= ~(1 << LEDOUT);
+		_delay_ms(200);
+	}
+}