Fix double-buffering for spi display (it's actually using double-buffering, now)

2 files changed, 5 insertions, 0 deletions

diff --git a/src/DisplayApp/DisplayApp.cpp b/src/DisplayApp/DisplayApp.cpp
index 2519f40..316312e 100644
--- a/src/DisplayApp/DisplayApp.cpp
+++ b/src/DisplayApp/DisplayApp.cpp
@@ -45,6 +45,9 @@ void DisplayApp::Process(void *instance) {
   NRF_LOG_INFO("DisplayApp task started!");
   app->InitHw();
 
+  // Send a dummy notification to unlock the lvgl display driver for the first iteration
+  xTaskNotifyGive(xTaskGetCurrentTaskHandle());
+
   while (1) {
 
     app->Refresh();
diff --git a/src/DisplayApp/LittleVgl.cpp b/src/DisplayApp/LittleVgl.cpp
index 50744ac..9579454 100644
--- a/src/DisplayApp/LittleVgl.cpp
+++ b/src/DisplayApp/LittleVgl.cpp
@@ -62,6 +62,8 @@ void LittleVgl::InitTouchpad() {
 }
 
 void LittleVgl::FlushDisplay(const lv_area_t *area, lv_color_t *color_p) {
+  ulTaskNotifyTake(pdTRUE, 500);
+
   auto x = area->x1;
   auto y = area->y1;
   auto width = (area->x2-area->x1)+1;