Diff: NextionSerial.cpp

Revision:

0:87b7b2ae63c3

--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/NextionSerial.cpp	Wed Mar 03 09:01:07 2021 +0100
@@ -0,0 +1,75 @@
+#include "NextionSerial.h"
+#include "NextionUI.h"
+
+#include <cstdio>
+#include <iterator>
+#include <string>
+
+NextionSerial::NextionSerial(PinName aTxPin, PinName aRxPin, int aBaud) :
+  iNextionSerial(aTxPin, aRxPin, aBaud)
+{
+  iNextionSerial.set_blocking(true);
+  serialThread.start([this]() { SerialLoop(); });
+}
+
+void NextionSerial::AddNextionUI(NextionUI* aNextionUI)
+{
+    iNextionUiElements.emplace_back(aNextionUI);
+}
+
+void NextionSerial::SerialLoop() {
+  while (true) {
+    char receivedBytes[16]{0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
+                           0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00};
+    iNextionSerial.read(&receivedBytes, sizeof(receivedBytes));
+
+    // 0x65 is UI Input Event
+    if (receivedBytes[0] == 0x65) {
+      auto nextionUI = std::find_if(iNextionUiElements.begin(), iNextionUiElements.end(), [&receivedBytes](NextionUI* aNextionUI)
+      {
+          return (aNextionUI->GetPage() == static_cast<int>(receivedBytes[1]) &&
+                 (aNextionUI->GetId() == static_cast<int>(receivedBytes[2])));
+      });
+
+      if (nextionUI != iNextionUiElements.end())
+      {
+          if (static_cast<int>(receivedBytes[3] == 1))
+          {
+              (*nextionUI)->PressReleaseTriggered(TEventType::EPress);
+          }
+          else if (static_cast<int>(receivedBytes[3] == 0))
+          {
+              (*nextionUI)->PressReleaseTriggered(TEventType::ERelease);
+          }
+      }
+    }
+  }
+}
+
+bool NextionSerial::GetCurrentDualStateButton(const std::string& aObjectName)
+{
+    std::string command = "get ";
+    command.append(aObjectName);
+    command.append(".val");
+    command.append(3, 0xff);
+    iNextionSerial.write(command.c_str(), command.size());
+
+    char receivedBytes[16]{0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
+                           0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00};
+    iNextionSerial.read(&receivedBytes, sizeof(receivedBytes));
+
+      if (receivedBytes[0] == 0x71 && receivedBytes[1] == 0x00 &&
+          receivedBytes[2] == 0x00 && receivedBytes[3] == 0x00 &&
+          receivedBytes[4] == 0x00 && receivedBytes[5] == 0xFF &&
+          receivedBytes[6] == 0xFF && receivedBytes[7] == 0xFF) {
+        return false;
+      } else if (receivedBytes[0] == 0x71 && receivedBytes[1] == 0x01 &&
+                 receivedBytes[2] == 0x00 && receivedBytes[3] == 0x00 &&
+                 receivedBytes[4] == 0x00 && receivedBytes[5] == 0xFF &&
+                 receivedBytes[6] == 0xFF && receivedBytes[7] == 0xFF) {
+        return true;
+      } else {
+        printf("Error!! Current state of DualStateButton is invalid @ %s : %d \n", __PRETTY_FUNCTION__, __LINE__ );
+        return false;
+      }
+}
\ No newline at end of file