some progress

canvas.h

@@ -0,0 +1,23 @@
+#ifndef _CANVAS_H_
+#define _CANVAS_H_
+
+#include <stdint.h>
+
+
+#define CANVAS_WIDTH 10
+#define CANVAS_HEIGHT 6
+
+typedef struct {
+  uint8_t width;
+  uint8_t height;
+  uint8_t size;
+  uint8_t *canvas;
+} canvas_t;
+
+void canvasInit();
+canvas_t *canvasGet();
+void canvasShow();
+
+
+
+#endif // _CANVAS_H_