If display is on on the @BigCorvus board and we xmit the board browns out?

src/graphics/TFT.cpp

@@ -1,12 +1,13 @@
 #include "configuration.h"
 
 #ifdef ST7735_CS
+#include "SPILock.h"
 #include "TFT.h"
 #include "graphics/configs.h"
 #include <SPI.h>
 #include <TFT_eSPI.h> // Graphics and font library for ST7735 driver chip
 
-TFT_eSPI tft = TFT_eSPI(); // Invoke library, pins defined in User_Setup.h
+static TFT_eSPI tft = TFT_eSPI(); // Invoke library, pins defined in User_Setup.h
 
 TFTDisplay::TFTDisplay(uint8_t address, int sda, int scl)
 {
@@ -17,6 +18,9 @@ TFTDisplay::TFTDisplay(uint8_t address, int sda, int scl)
 // Write the buffer to the display memory
 void TFTDisplay::display(void)
 {
+    concurrency::LockGuard g(spiLock);
+
+#if 1
     // FIXME - only draw bits have changed (use backbuf similar to the other displays)
     // tft.drawBitmap(0, 0, buffer, 128, 64, TFT_YELLOW, TFT_BLACK);
     for (uint8_t y = 0; y < SCREEN_HEIGHT; y++) {
@@ -28,6 +32,7 @@ void TFTDisplay::display(void)
             tft.drawPixel(x, y, isset ? TFT_WHITE : TFT_BLACK);
         }
     }
+#endif
 }
 
 // Send a command to the display (low level function)
@@ -47,10 +52,12 @@ bool TFTDisplay::connect()
     pinMode(ST7735_BACKLIGHT_EN, OUTPUT);
 #endif
 
+#if 1
     tft.init();
     tft.setRotation(3); // Orient horizontal and wide underneath the silkscreen name label
-    // tft.fillScreen(TFT_BLUE);
+    tft.fillScreen(TFT_BLACK);
     // tft.drawRect(0, 0, 40, 10, TFT_PURPLE); // wide rectangle in upper left
+#endif
 
     return true;
 }