1 files changed, 51 insertions, 0 deletions
diff --git a/libopencm3/include/libopencm3/sam/gpio.h b/libopencm3/include/libopencm3/sam/gpio.h
new file mode 100644
index 0000000..20fd9ad
--- /dev/null
+++ b/libopencm3/include/libopencm3/sam/gpio.h
@@ -0,0 +1,51 @@
+/*
+ * This file is part of the libopencm3 project.
+ *
+ * Copyright (C) 2013 Gareth McMullin <gareth@blacksphere.co.nz>
+ *
+ * This library is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU Lesser General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * This library 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 Lesser General Public License for more details.
+ *
+ * You should have received a copy of the GNU Lesser General Public License
+ * along with this library.  If not, see <http://www.gnu.org/licenses/>.
+ */
+
+#ifndef SAM3X_GPIO_H
+#define SAM3X_GPIO_H
+
+#include <libopencm3/sam/pio.h>
+
+/* flags may be or'd together, but only contain one of
+ * GPOUTPUT, PERIPHA and PERIPHB */
+enum gpio_flags {
+	GPIO_FLAG_GPINPUT = 0,
+	GPIO_FLAG_GPOUTPUT = 1,
+	GPIO_FLAG_PERIPHA = 2,
+	GPIO_FLAG_PERIPHB = 3,
+	GPIO_FLAG_OPEN_DRAIN = 4,
+	GPIO_FLAG_PULL_UP = 8,
+};
+
+void gpio_init(uint32_t gpioport, uint32_t pins, enum gpio_flags flags);
+
+static inline void gpio_set(uint32_t gpioport, uint32_t gpios)
+{
+	PIO_SODR(gpioport) = gpios;
+}
+
+static inline void gpio_clear(uint32_t gpioport, uint32_t gpios)
+{
+	PIO_CODR(gpioport) = gpios;
+}
+
+void gpio_toggle(uint32_t gpioport, uint32_t gpios);
+
+#endif
+