up and down

displayTest.c

@@ -7,20 +7,37 @@ static canvas_t *canvas;
 
 #define MAX_COLOR 0x0d
 
+typedef enum {
+  e_WIPE_LAST_COLUMN_DOWN,
+  e_PIXELS_UP,
+  e_WIPE_LAST_PIXEL_UP,
+  e_PIXELS_DOWN,
+  e_WIPE_LAST_PIXEL_DOWN,
+  e_ROWS_UP,
+  e_WIPE_LAST_ROW_UP,
+  e_ROWS_DOWN,
+  e_WIPE_LAST_ROW_DOWN,
+  e_COLUMNS_UP,
+  e_WIPE_LAST_COLUMN_UP,
+  e_COLUMNS_DOWN
+} t_State;
+
 void displayTestExec(void *args) {
-  static uint8_t last = 0xff;
+  static int16_t last = 0xff;
-  static uint8_t current = 0;
+  static int16_t current = 0;
   static uint8_t color = 0x01;
-  static uint8_t state = 1;
+  static t_State state = e_PIXELS_UP;
 
   switch (state) {
-    case 0:
+    // wipe last column
+    case e_WIPE_LAST_COLUMN_DOWN:
       for (uint16_t i = 0; i < canvas->height; i++) {
         canvasSetPixel(last, i, 0);
       }
       last = 0xff;
-      state = 1;
+      state = e_PIXELS_UP;
-    case 1:
+    // pixels up
+    case e_PIXELS_UP:
       if (last != 0xff) {
         *((canvas->canvas)+last) = 0x80;
       }
@@ -30,14 +47,36 @@ void displayTestExec(void *args) {
       current++;
       if (current >= canvas->size) {
         current = 0;
-        state = 2;
+        state = e_WIPE_LAST_PIXEL_UP;
       }
       break;
-    case 2:
+    // wipe last pixel
+    case e_WIPE_LAST_PIXEL_UP:
       *((canvas->canvas)+last) = 0x80;
       last = 0xff;
-      state = 3;
+      current = canvas->size - 1;
-    case 3:
+      state = e_PIXELS_DOWN;
+    // pixels down
+    case e_PIXELS_DOWN:
+      if (last != 0xff) {
+        *((canvas->canvas)+last) = 0x80;
+      }
+
+      last = current;
+      *((canvas->canvas)+current) = (color + 0x80);
+      current--;
+      if (current < 0) {
+        current = 0;
+        state = e_WIPE_LAST_PIXEL_DOWN;
+      }
+      break;
+    // wipe last pixel
+    case e_WIPE_LAST_PIXEL_DOWN:
+      *((canvas->canvas)+last) = 0x80;
+      last = 0xff;
+      state = e_ROWS_UP;
+    // rows up
+    case e_ROWS_UP:
       if (last != 0xff) {
         for (uint16_t i = 0; i < canvas->width; i++) {
           canvasSetPixel(i, last, 0);
@@ -51,16 +90,44 @@ void displayTestExec(void *args) {
       current++;
       if (current >= canvas->height) {
         current = 0;
-        state = 4;
+        state = e_WIPE_LAST_ROW_UP;
       }
       break;
-    case 4:
+    // wipe last row
+    case e_WIPE_LAST_ROW_UP:
       for (uint16_t i = 0; i < canvas->width; i++) {
         canvasSetPixel(i, last, 0);
       }
       last = 0xff;
-      state = 5;
+      current = canvas->height - 1;
-    case 5:
+      state = e_ROWS_DOWN;
+    // rows down
+    case e_ROWS_DOWN:
+      if (last != 0xff) {
+        for (uint16_t i = 0; i < canvas->width; i++) {
+          canvasSetPixel(i, last, 0);
+        }
+      }
+
+      last = current;
+      for (uint16_t i = 0; i < canvas->width; i++) {
+        canvasSetPixel(i, current, color);
+      }
+      current--;
+      if (current < 0) {
+        current = 0;
+        state = e_WIPE_LAST_ROW_DOWN;
+      }
+      break;
+    // wipe last row
+    case e_WIPE_LAST_ROW_DOWN:
+      for (uint16_t i = 0; i < canvas->width; i++) {
+        canvasSetPixel(i, last, 0);
+      }
+      last = 0xff;
+      state = e_COLUMNS_UP;
+    // columns up
+    case e_COLUMNS_UP:
       if (last != 0xff) {
         for (uint16_t i = 0; i < canvas->height; i++) {
           canvasSetPixel(last, i, 0);
@@ -74,7 +141,33 @@ void displayTestExec(void *args) {
       current++;
       if (current >= canvas->width) {
         current = 0;
-        state = 0;
+        state = e_WIPE_LAST_COLUMN_UP;
+      }
+      break;
+    // wipe last column
+    case e_WIPE_LAST_COLUMN_UP:
+      for (uint16_t i = 0; i < canvas->height; i++) {
+        canvasSetPixel(last, i, 0);
+      }
+      last = 0xff;
+      current = canvas->width - 1;
+      state = e_COLUMNS_DOWN;
+    // columns down
+    case e_COLUMNS_DOWN:
+      if (last != 0xff) {
+        for (uint16_t i = 0; i < canvas->height; i++) {
+          canvasSetPixel(last, i, 0);
+        }
+      }
+
+      last = current;
+      for (uint16_t i = 0; i < canvas->height; i++) {
+        canvasSetPixel(current, i, color);
+      }
+      current--;
+      if (current < 0) {
+        current = 0;
+        state = e_WIPE_LAST_COLUMN_DOWN;
       }
       break;
   }