diff --git a/common/app/app.c b/common/app/app.c
index 75294ff..229d3c4 100644
--- a/common/app/app.c
+++ b/common/app/app.c
@@ -17,6 +17,7 @@ void app_init() {
 	tft_draw_rectangle(40,210,60,235,BLUE);
 	tft_fill_rectangle(100,215,200,225,GREEN);
 	tft_draw_line(10,215,310,225,RGB(0xFF,0,0xFF));
+    tft_draw_circle(10,10,100, RED);
 }
 
 
diff --git a/common/lowlevel/ll_tft.h b/common/lowlevel/ll_tft.h
index e629020..8815d63 100644
--- a/common/lowlevel/ll_tft.h
+++ b/common/lowlevel/ll_tft.h
@@ -8,4 +8,4 @@ void ll_tft_draw_pixel(uint16_t x,uint16_t y,uint16_t color);
 void ll_tft_draw_rectangle(uint16_t x1,uint16_t y1,uint16_t x2,uint16_t y2, uint16_t color);
 void ll_tft_fill_rectangle(uint16_t x1,uint16_t y1,uint16_t x2,uint16_t y2, uint16_t color);
 void ll_tft_draw_bitmap_unscaled(uint16_t x, uint16_t y, uint16_t width, uint16_t height, const uint16_t *dat);
-
+void ll_tft_draw_circle(uint16_t x, uint16_t y, uint16_t r, uint16_t color);
diff --git a/common/tft/tft.c b/common/tft/tft.c
index f74b366..2604be0 100644
--- a/common/tft/tft.c
+++ b/common/tft/tft.c
@@ -33,3 +33,7 @@ void tft_fill_rectangle(uint16_t x1,uint16_t y1,uint16_t x2,uint16_t y2, uint16_
 void tft_draw_bitmap_unscaled(uint16_t x, uint16_t y, uint16_t width, uint16_t height, const uint16_t* dat) {
 	ll_tft_draw_bitmap_unscaled(x,y,width,height,dat);
 }
+
+void tft_draw_circle(uint16_t x, uint16_t y, uint16_t r, uint16_t color) {
+    ll_tft_draw_circle(x, y, r, color);
+}
diff --git a/common/tft/tft.h b/common/tft/tft.h
index 2667613..ef25c58 100644
--- a/common/tft/tft.h
+++ b/common/tft/tft.h
@@ -18,3 +18,4 @@ void tft_draw_pixel(uint16_t x,uint16_t y,uint16_t color);
 void tft_draw_rectangle(uint16_t x1,uint16_t y1,uint16_t x2,uint16_t y2, uint16_t color);
 void tft_fill_rectangle(uint16_t x1,uint16_t y1,uint16_t x2,uint16_t y2, uint16_t color);
 void tft_draw_bitmap_unscaled(uint16_t x, uint16_t y, uint16_t width, uint16_t height, const uint16_t* dat);
+void tft_draw_circle(uint16_t x, uint16_t y, uint16_t r, uint16_t color);
diff --git a/discovery/src/ll_tft.c b/discovery/src/ll_tft.c
index 4254f06..05bed62 100644
--- a/discovery/src/ll_tft.c
+++ b/discovery/src/ll_tft.c
@@ -28,6 +28,10 @@ void ll_tft_draw_bitmap_unscaled(uint16_t x, uint16_t y, uint16_t width, uint16_
 
 }
 
+void ll_tft_draw_circle(uint16_t x, uint16_t y, uint16_t r, uint16_t color) {
+
+}
+
 
 
 
diff --git a/emulator/qt/ll_tft.cpp b/emulator/qt/ll_tft.cpp
index 861489a..8ba3ed3 100644
--- a/emulator/qt/ll_tft.cpp
+++ b/emulator/qt/ll_tft.cpp
@@ -5,7 +5,6 @@ extern "C" {
 #include "ll_tft.h"
 }
 
-
 MainWindow* mainwindow;
 
 bool ll_tft_init() {
@@ -20,7 +19,6 @@ void ll_tft_draw_line(uint16_t x1, uint16_t y1, uint16_t x2, uint16_t y2, uint16
     mainwindow->draw_line(x1,y1,x2,y2,color);
 }
 
-
 void ll_tft_clear(uint16_t color) {
     mainwindow->clear(color);
 }
@@ -41,4 +39,8 @@ void ll_tft_draw_bitmap_unscaled(uint16_t x, uint16_t y, uint16_t width, uint16_
     mainwindow->draw_bitmap_unscaled(x,y,width,height,dat);
 }
 
+void ll_tft_draw_circle(uint16_t x, uint16_t y, uint16_t r, uint16_t color) {
+    mainwindow->draw_circle(x,y,r,color);
+}
+
 
diff --git a/emulator/qt/mainwindow.cpp b/emulator/qt/mainwindow.cpp
index 2dc85ce..711c58e 100644
--- a/emulator/qt/mainwindow.cpp
+++ b/emulator/qt/mainwindow.cpp
@@ -26,11 +26,7 @@ QRgb QRgbFromRGB565(uint16_t color) {
 }
 
 
-MainWindow::MainWindow(QWidget *parent) :
-    QMainWindow(parent),
-    image(DISPLAY_WIDTH,DISPLAY_HEIGHT,QImage::Format_RGB16),
-    ui(new Ui::MainWindow)
-{
+MainWindow::MainWindow(QWidget *parent) : QMainWindow(parent), image(DISPLAY_WIDTH,DISPLAY_HEIGHT, QImage::Format_RGB16), ui(new Ui::MainWindow){
     ui->setupUi(this);
     image.fill(Qt::black);
 }
@@ -99,6 +95,16 @@ void MainWindow::draw_bitmap_unscaled(uint16_t x, uint16_t y, uint16_t width, ui
     update();
 }
 
+void MainWindow::draw_circle(uint16_t x, uint16_t y, uint16_t r, uint16_t color)
+{
+    //render_mutex.lock();
+    QPainter painter(&(image));
+    painter.setPen(QColorFromRGB565(color));
+    painter.drawEllipse(QPoint(x,y), r, r);
+    //render_mutex.unlock();
+    update();
+}
+
 void MainWindow::paintEvent(QPaintEvent *)
 {
   //render_mutex.lock();
diff --git a/emulator/qt/mainwindow.h b/emulator/qt/mainwindow.h
index ce851e5..2e903dc 100644
--- a/emulator/qt/mainwindow.h
+++ b/emulator/qt/mainwindow.h
@@ -21,6 +21,7 @@ public:
     void draw_rectangle(uint16_t x1, uint16_t y1, uint16_t x2, uint16_t y2, uint16_t color);
     void fill_rectangle(uint16_t x1, uint16_t y1, uint16_t x2, uint16_t y2, uint16_t color);
     void draw_bitmap_unscaled(uint16_t x, uint16_t y, uint16_t width, uint16_t height, const uint16_t *dat);
+    void draw_circle(uint16_t x, uint16_t y, uint16_t r, uint16_t color);
 
 
 protected: