samd21: Add support for gpio pins

Signed-off-by: Kevin O'Connor <kevin@koconnor.net>

1 files changed, 22 insertions, 0 deletions

diff --git a/src/samd21/gpio.h b/src/samd21/gpio.h
new file mode 100644
index 00000000..0cba5dba
--- /dev/null
+++ b/src/samd21/gpio.h
@@ -0,0 +1,22 @@
+#ifndef __SAM3X8E_GPIO_H
+#define __SAM3X8E_GPIO_H
+
+#include <stdint.h>
+
+struct gpio_out {
+    void *regs;
+    uint32_t bit;
+};
+struct gpio_out gpio_out_setup(uint8_t pin, uint8_t val);
+void gpio_out_toggle_noirq(struct gpio_out g);
+void gpio_out_toggle(struct gpio_out g);
+void gpio_out_write(struct gpio_out g, uint8_t val);
+
+struct gpio_in {
+    void *regs;
+    uint32_t bit;
+};
+struct gpio_in gpio_in_setup(uint8_t pin, int8_t pull_up);
+uint8_t gpio_in_read(struct gpio_in g);
+
+#endif // gpio.h