Fix #1960

TFT pixel reads for smooth graphics functions now supported.

TFT_eSPI.cpp

@@ -1071,7 +1071,7 @@ uint16_t TFT_eSPI::readPixel(int32_t x0, int32_t y0)
 
 #if defined(TFT_PARALLEL_8_BIT) || defined(RP2040_PIO_INTERFACE)
 
-  CS_L;
+  if (!inTransaction) CS_L;
 
   readAddrWindow(x0, y0, 1, 1);
 
@@ -1091,7 +1091,7 @@ uint16_t TFT_eSPI::readPixel(int32_t x0, int32_t y0)
     // Read window pixel 24 bit RGB values and fill in LS bits
     uint16_t rgb = ((readByte() & 0xF8) << 8) | ((readByte() & 0xFC) << 3) | (readByte() >> 3);
 
-    CS_H;
+    if (!inTransaction) CS_H;
 
     // Set masked pins D0- D7 to output
     busDir(dir_mask, OUTPUT);
@@ -1103,7 +1103,7 @@ uint16_t TFT_eSPI::readPixel(int32_t x0, int32_t y0)
     // Fetch the 16 bit BRG pixel
     uint16_t bgr = (readByte() << 8) | readByte();
 
-    CS_H;
+    if (!inTransaction) CS_H;
 
     // Set masked pins D0- D7 to output
     busDir(dir_mask, OUTPUT);