Update local color mid-grey to RGB565

A hardcoded value of 0x808080 was in the code for a mid-level grey. This is an RGB888 value, but the ST77XX library uses RGB565 values. A mid-grey in RGB565 is 0x8410. A local define was done to define this as STS77XX_GREY and the new value placed in the calls previously using 0x808080. This solves a compiler integer overflow warning preventing CI from completing.

Author: TheKitty

FunHouse_Arduino_Demos/selftest/selftest.ino

@@ -10,6 +10,7 @@
 
 #define NUM_DOTSTAR 5
 #define BG_COLOR ST77XX_BLACK
+#define ST77XX_GREY 0x8410   // Colors are in RGB565 format
 
 // display!
 Adafruit_ST7789 tft = Adafruit_ST7789(TFT_CS, TFT_DC, TFT_RESET);
@@ -125,23 +126,23 @@ void loop() {
   tft.setTextColor(ST77XX_YELLOW);
   tft.print("Buttons: ");
   if (! digitalRead(BUTTON_DOWN)) {  
-    tft.setTextColor(0x808080);
+    tft.setTextColor(ST77XX_GREY);
   } else {
     Serial.println("DOWN pressed");
     tft.setTextColor(ST77XX_WHITE);
   }
   tft.print("DOWN ");
 
   if (! digitalRead(BUTTON_SELECT)) {  
-    tft.setTextColor(0x808080);
+    tft.setTextColor(ST77XX_GREY);
   } else {
     Serial.println("SELECT pressed");
     tft.setTextColor(ST77XX_WHITE);
   }
   tft.print("SEL ");
 
   if (! digitalRead(BUTTON_UP)) {  
-    tft.setTextColor(0x808080);
+    tft.setTextColor(ST77XX_GREY);
   } else {
     Serial.println("UP pressed");
     tft.setTextColor(ST77XX_WHITE);
@@ -156,7 +157,7 @@ void loop() {
   tft.print("Captouch 6: ");
   touchread = touchRead(6);
   if (touchread < 10000 ) {  
-    tft.setTextColor(0x808080, BG_COLOR);
+    tft.setTextColor(ST77XX_GREY, BG_COLOR);
   } else {
     tft.setTextColor(ST77XX_WHITE, BG_COLOR);
   }
@@ -169,7 +170,7 @@ void loop() {
   tft.print("Captouch 7: ");
   touchread = touchRead(7);
   if (touchread < 20000 ) {  
-    tft.setTextColor(0x808080, BG_COLOR);
+    tft.setTextColor(ST77XX_GREY, BG_COLOR);
   } else {
     tft.setTextColor(ST77XX_WHITE, BG_COLOR);
   }
@@ -183,7 +184,7 @@ void loop() {
   tft.print("Captouch 8: ");
   touchread = touchRead(8);
   if (touchread < 20000 ) {  
-    tft.setTextColor(0x808080, BG_COLOR);
+    tft.setTextColor(ST77XX_GREY, BG_COLOR);
   } else {
     tft.setTextColor(ST77XX_WHITE, BG_COLOR);
   }