Switch from clock to rainbow using touchscreen.

Demo of vertical scrolling in screen Clock.

src/CMakeLists.txt

@@ -36,6 +36,7 @@ list(APPEND SOURCE_FILES
   DisplayApp/Screens/Screen.cpp
   DisplayApp/Screens/Clock.cpp
   DisplayApp/Screens/Message.cpp
+  DisplayApp/Screens/Rainbow.cpp
   main.cpp
   drivers/St7789.cpp
   drivers/SpiMaster.cpp
@@ -60,6 +61,7 @@ set(INCLUDE_FILES
   DisplayApp/Screens/Screen.h
   DisplayApp/Screens/Clock.h
   DisplayApp/Screens/Message.h
+  DisplayApp/Screens/Rainbow.h
   drivers/St7789.h
   drivers/SpiMaster.h
   Components/Gfx/Gfx.h

src/Components/Gfx/Gfx.cpp

@@ -30,7 +30,7 @@ void Gfx::ClearScreen() {
 void Gfx::FillRectangle(uint8_t x, uint8_t y, uint8_t w, uint8_t h, uint16_t color) {
   SetBackgroundColor(color);
 
-  state.remainingIterations = 240 + 1;
+  state.remainingIterations = h;
   state.currentIteration = 0;
   state.busy = true;
   state.action = Action::FillRectangle;
@@ -183,4 +183,12 @@ void Gfx::WaitTransfertFinished() const {
   ulTaskNotifyTake(pdTRUE, 500);
 }
 
+void Gfx::SetScrollArea(uint16_t topFixedLines, uint16_t scrollLines, uint16_t bottomFixedLines) {
+  lcd.VerticalScrollDefinition(topFixedLines, scrollLines, bottomFixedLines);
+}
+
+void Gfx::SetScrollStartLine(uint16_t line) {
+  lcd.VerticalScrollStartAddress(line);
+}
+
 

src/Components/Gfx/Gfx.h

@@ -19,6 +19,8 @@ namespace Pinetime {
         void DrawString(uint8_t x, uint8_t y, uint16_t color, const char* text, const FONT_INFO *p_font, bool wrap);
         void DrawChar(const FONT_INFO *font, uint8_t c, uint8_t *x, uint8_t y, uint16_t color);
         void FillRectangle(uint8_t x, uint8_t y, uint8_t width, uint8_t height, uint16_t color);
+        void SetScrollArea(uint16_t topFixedLines, uint16_t scrollLines, uint16_t bottomFixedLines);
+        void SetScrollStartLine(uint16_t line);
 
         void Sleep();
         void Wakeup();

src/DisplayApp/DisplayApp.cpp

@@ -26,9 +26,10 @@ DisplayApp::DisplayApp(Pinetime::Drivers::St7789& lcd,
         batteryController{batteryController},
         bleController{bleController},
         dateTimeController{dateTimeController},
-        clockScreen{gfx} {
+        clockScreen{gfx},
+        rainbowScreen{gfx} {
   msgQueue = xQueueCreate(queueSize, itemSize);
-  currentScreen = &clockScreen;
+  currentScreen = &rainbowScreen;
 }
 
 void DisplayApp::Start() {
@@ -68,7 +69,7 @@ void DisplayApp::Refresh() {
       break;
     case States::Running:
       RunningState();
-      queueTimeout = 1000;
+      queueTimeout = 50;
       break;
   }
 
@@ -139,7 +140,12 @@ void DisplayApp::OnTouchEvent() {
   auto info = touchPanel.GetTouchInfo();
 
   if(info.isTouch) {
-    gfx.FillRectangle(info.x-10, info.y-10, 20,20, pointColor);
-    pointColor+=10;
+    if(currentScreen == &clockScreen)
+      currentScreen = &rainbowScreen;
+    else {
+      gfx.SetScrollStartLine(0);
+      currentScreen = &clockScreen;
+    }
+    currentScreen->Refresh(true);
   }
 }

src/DisplayApp/DisplayApp.h

@@ -14,6 +14,7 @@
 #include <date/date.h>
 #include <DisplayApp/Screens/Clock.h>
 #include <DisplayApp/Screens/Message.h>
+#include <DisplayApp/Screens/Rainbow.h>
 
 extern const FONT_INFO lCD_70ptFontInfo;
 
@@ -58,6 +59,7 @@ namespace Pinetime {
         void OnTouchEvent();
 
         Screens::Clock clockScreen;
+        Screens::Rainbow rainbowScreen;
         Screens::Screen* currentScreen = nullptr;
         static constexpr uint8_t pinLcdBacklight1 = 14;
         static constexpr uint8_t pinLcdBacklight2 = 22;

src/DisplayApp/Screens/Clock.cpp

@@ -5,7 +5,6 @@
 #include "Clock.h"
 
 using namespace Pinetime::Applications::Screens;
-
 void Clock::Refresh(bool fullRefresh) {
   if(fullRefresh) {
     gfx.FillRectangle(0,0,240,240,0x0000);
@@ -16,6 +15,7 @@ void Clock::Refresh(bool fullRefresh) {
     auto dummy = currentDateTime.Get();
   }
 
+
   if (fullRefresh || batteryPercentRemaining.IsUpdated()) {
     char batteryChar[11];
     auto newBatteryValue = batteryPercentRemaining.Get();

src/DisplayApp/Screens/Rainbow.cpp

@@ -0,0 +1,58 @@
+#include "Rainbow.h"
+
+using namespace Pinetime::Applications::Screens;
+
+void Rainbow::Refresh(bool fullRefresh) {
+  if(fullRefresh) {
+    gfx.FillRectangle(0, 0, 240, 240, 0x0000);
+
+    gfx.SetScrollArea(0, 240, 320 - 240);
+    scrollLine = 0;
+    b = 31;
+    r = 0;
+    g = 0;
+    step = 0;
+  }
+
+  gfx.SetScrollStartLine(scrollLine);
+
+  switch(step) {
+    case 0:
+      if(r == 31) step = 1;
+      else r++;
+      break;
+    case 1:
+      if(b == 0) step = 2;
+      else b--;
+      break;
+    case 2:
+      if(g == 31) step = 3;
+      else g++;
+      break;
+    case 3:
+      if(r == 0) step = 4;
+      else r--;
+      break;
+    case 4:
+      if(b == 31) step = 5;
+      else b++;
+      break;
+    case 5:
+      if(g == 0) step = 0;
+      else g--;
+      break;
+  }
+
+  uint16_t color = (g &  0x1f) | ((r & 0x1f) << 6) | ((b & 0x1f) << 11);
+
+  // Invert the 2 byte from color to adapt to the lcd controller
+  uint8_t l = color & 0x00ffu;
+  uint8_t h = (color >> 8u) & 0x00ffu;
+
+  uint16_t c = h + (l << 8);
+
+  gfx.FillRectangle(0, scrollLine,240,1, c);
+  scrollLine+=1;
+
+  if(scrollLine == 240) scrollLine = 0;
+}

src/DisplayApp/Screens/Rainbow.h

@@ -0,0 +1,24 @@
+#pragma once
+
+#include "Screen.h"
+
+namespace Pinetime {
+  namespace Applications {
+    namespace Screens {
+      class Rainbow  : public Screen{
+        public:
+          explicit Rainbow(Components::Gfx& gfx) : Screen(gfx) {}
+
+          void Refresh(bool fullRefresh) override;
+
+        private:
+          uint16_t scrollLine = 0;
+          uint8_t r = 0;
+          uint8_t g = 0;
+          uint8_t b = 0;
+
+          uint8_t step = 0;
+      };
+    }
+  }
+}

src/drivers/St7789.cpp

@@ -120,6 +120,22 @@ void St7789::DisplayOff() {
   nrf_delay_ms(500);
 }
 
+void St7789::VerticalScrollDefinition(uint16_t topFixedLines, uint16_t scrollLines, uint16_t bottomFixedLines) {
+  WriteCommand(static_cast<uint8_t>(Commands::VerticalScrollDefinition));
+  WriteData(topFixedLines >> 8u);
+  WriteData(topFixedLines & 0x00ffu);
+  WriteData(scrollLines >> 8u);
+  WriteData(scrollLines & 0x00ffu);
+  WriteData(bottomFixedLines >> 8u);
+  WriteData(bottomFixedLines & 0x00ffu);
+}
+
+void St7789::VerticalScrollStartAddress(uint16_t line) {
+  WriteCommand(static_cast<uint8_t>(Commands::VerticalScrollStartAddress));
+  WriteData(line >> 8u);
+  WriteData(line & 0x00ffu);
+}
+
 void St7789::Uninit() {
 
 }

src/drivers/St7789.h

@@ -11,6 +11,10 @@ namespace Pinetime {
         void Uninit();
         void DrawPixel(uint16_t x, uint16_t y, uint32_t color);
 
+        void VerticalScrollDefinition(uint16_t topFixedLines, uint16_t scrollLines, uint16_t bottomFixedLines);
+        void VerticalScrollStartAddress(uint16_t line);
+
+
         void BeginDrawBuffer(uint16_t x, uint16_t y, uint16_t width, uint16_t height);
         void NextDrawBuffer(const uint8_t* data, size_t size);
 
@@ -47,7 +51,9 @@ namespace Pinetime {
           ColumnAddressSet = 0x2a,
           RowAddressSet = 0x2b,
           WriteToRam = 0x2c,
-          MemoryDataAccessControl = 036,
+          MemoryDataAccessControl = 0x36,
+          VerticalScrollDefinition = 0x33,
+          VerticalScrollStartAddress = 0x37,
           ColMod = 0x3a,
         };
         void WriteData(uint8_t data);