#31 Make cleaning buffer 7x faster

components/CalEPD/models/gdeh0154d67.cpp

@@ -77,8 +77,6 @@ void Gdeh0154d67::_setPartialRamArea(uint16_t x, uint16_t y, uint16_t w, uint16_
 }
 
 void Gdeh0154d67::_wakeUp(){
-  printf("wakeup() start commands\n");
-
   IO.cmd(0x12);
   _waitBusy("epd_wakeup_power:ON", power_on_time);
   IO.cmd(0x01); // Driver output control
@@ -225,6 +223,7 @@ void Gdeh0154d67::updateWindow(int16_t x, int16_t y, int16_t w, int16_t h, bool
       IO.data(~data);
     }
   }
+
   uint64_t endTime = esp_timer_get_time();
 
   // Update partial
@@ -234,17 +233,29 @@ void Gdeh0154d67::updateWindow(int16_t x, int16_t y, int16_t w, int16_t h, bool
   _waitBusy("partial_update", 100);
   uint64_t updateTime = esp_timer_get_time();
 
-  printf("\n\nSTATS (ms)\n%llu _wakeUp settings+send Buffer\n%llu update \n%llu total time in millis\n",
-         (endTime - startTime) / 1000, (updateTime - endTime) / 1000, (updateTime - startTime) / 1000);
-
+
   // Clean buffer: 0x01 is essential
   _setRamDataEntryMode(0x01);
+
+  // v2 SPI optimizing. Check: https://github.com/martinberlin/cale-idf/wiki/About-SPI-optimization
   IO.cmd(0x24);
-  for (int16_t x1 = xs_d8; x1 <= GDEH0154D67_BUFFER_SIZE; x1++)
+
+  uint8_t xLineBytes = GDEH0154D67_WIDTH / 8;
+  uint8_t x1buf[xLineBytes];
+  for (uint16_t y = 1; y <= GDEH0154D67_HEIGHT; y++)
   {
-    IO.data(0xFF);
+    for (uint16_t x = 1; x <= xLineBytes; x++)
+    {
+      x1buf[x - 1] = 0xFF;
+    }
+    IO.data(x1buf, sizeof(x1buf));
   }
 
+  uint64_t cleanTime = esp_timer_get_time();
+  printf("\n\nSTATS (ms)\n%llu _wakeUp settings+send Buffer\n%llu update \nclean_buffer:%llu\n%llu total time in millis\n",
+         (endTime - startTime) / 1000, (updateTime - endTime) / 1000, (cleanTime - updateTime) / 1000, (cleanTime - startTime) / 1000);
+
+
 }
 
 void Gdeh0154d67::_waitBusy(const char* message, uint16_t busy_time){