1 files changed, 29 insertions, 0 deletions
diff --git a/src/controller.h b/src/controller.h
new file mode 100644
index 0000000..4712dcc
--- /dev/null
+++ b/src/controller.h
@@ -0,0 +1,29 @@
+#ifndef CONTROLLER_H
+#define CONTROLLER_H
+
+#include <stdbool.h>
+#include <stddef.h>
+#include <stdint.h>
+
+#define CHANNEL_UNUSED 65535
+#define CHANNELS 8
+
+#define AXIS_MIN -32768
+#define AXIS_MAX 32767
+
+typedef uint16_t channel_t;
+
+struct controller {
+	void (*reset)(struct controller* cont);
+	void (*axis)(struct controller* cont, int axis_id, int value);
+	void (*button)(struct controller* cont, int button_id, bool down);
+	channel_t channels[CHANNELS];
+};
+
+inline channel_t channel_clamp(channel_t channel, channel_t min, channel_t max)
+{
+    channel_t upper = (channel < max) ? channel : max;
+    return (min < upper) ? upper : min;
+}
+
+#endif