some progress

canvas.c

@@ -0,0 +1,31 @@
+#include <string.h>
+#include <stdint.h>
+
+#include "canvas.h"
+#include "displayDriver.h"
+
+
+static canvas_t canvas;
+static uint8_t canvasStorage[CANVAS_WIDTH * CANVAS_HEIGHT];
+
+void canvasInit() {
+  canvas.height = CANVAS_HEIGHT;
+  canvas.width = CANVAS_WIDTH;
+  canvas.size = CANVAS_HEIGHT * CANVAS_WIDTH;
+  canvas.canvas = canvasStorage;
+
+  // Bit7 signals need to be transfered for octet
+  memset(canvasStorage, 0x80, canvas.size);
+
+  displayDriverTransferCanvas();
+}
+
+canvas_t *canvasGet() {
+  return &canvas;
+}
+
+void canvasShow() {
+  displayDriverTransferCanvas();
+}
+
+