some progress

displayTest.c

@@ -0,0 +1,29 @@
+#include <stdlib.h>
+#include "canvas.h"
+#include "PontCoopScheduler.h"
+
+
+static canvas_t *canvas;
+static uint8_t lastPixel = 0xff;
+static uint8_t currentPixel = 0;
+
+void displayTestExec(void *args) {
+  if (lastPixel != 0xff) {
+    *((canvas->canvas)+lastPixel) = 0x80;
+  }
+
+  lastPixel = currentPixel;
+  *((canvas->canvas)+currentPixel) = 0x81;
+  currentPixel++;
+  if (currentPixel >= canvas->size) {
+    currentPixel = 0;
+  }
+
+  canvasShow();
+}
+
+void displayTestInit() {
+  canvas = canvasGet();
+  schAdd(displayTestExec, NULL, 0, 50);
+}
+