Merge pull request #434 from caternuson/esp32_warns

Remove volatile from wait loops

Adafruit_SPITFT.cpp

@@ -2305,10 +2305,6 @@ inline void Adafruit_SPITFT::SPI_MOSI_HIGH(void) {
 #endif // end !HAS_PORT_SET_CLR
 #else  // !USE_FAST_PINIO
   digitalWrite(swspi._mosi, HIGH);
-#if defined(ESP32)
-  for (volatile uint8_t i = 0; i < 1; i++)
-    ;
-#endif // end ESP32
 #endif // end !USE_FAST_PINIO
 }
 
@@ -2328,10 +2324,6 @@ inline void Adafruit_SPITFT::SPI_MOSI_LOW(void) {
 #endif // end !HAS_PORT_SET_CLR
 #else  // !USE_FAST_PINIO
   digitalWrite(swspi._mosi, LOW);
-#if defined(ESP32)
-  for (volatile uint8_t i = 0; i < 1; i++)
-    ;
-#endif // end ESP32
 #endif // end !USE_FAST_PINIO
 }
 
@@ -2343,22 +2335,14 @@ inline void Adafruit_SPITFT::SPI_SCK_HIGH(void) {
 #if defined(HAS_PORT_SET_CLR)
 #if defined(KINETISK)
   *swspi.sckPortSet = 1;
-#else                                                // !KINETISK
+#else // !KINETISK
   *swspi.sckPortSet = swspi.sckPinMask;
-#if defined(__IMXRT1052__) || defined(__IMXRT1062__) // Teensy 4.x
-  for (volatile uint8_t i = 0; i < 1; i++)
-    ;
-#endif
 #endif
 #else  // !HAS_PORT_SET_CLR
   *swspi.sckPort |= swspi.sckPinMaskSet;
 #endif // end !HAS_PORT_SET_CLR
 #else  // !USE_FAST_PINIO
   digitalWrite(swspi._sck, HIGH);
-#if defined(ESP32)
-  for (volatile uint8_t i = 0; i < 1; i++)
-    ;
-#endif // end ESP32
 #endif // end !USE_FAST_PINIO
 }
 
@@ -2370,22 +2354,14 @@ inline void Adafruit_SPITFT::SPI_SCK_LOW(void) {
 #if defined(HAS_PORT_SET_CLR)
 #if defined(KINETISK)
   *swspi.sckPortClr = 1;
-#else                                                // !KINETISK
+#else // !KINETISK
   *swspi.sckPortClr = swspi.sckPinMask;
-#if defined(__IMXRT1052__) || defined(__IMXRT1062__) // Teensy 4.x
-  for (volatile uint8_t i = 0; i < 1; i++)
-    ;
-#endif
 #endif
 #else  // !HAS_PORT_SET_CLR
   *swspi.sckPort &= swspi.sckPinMaskClr;
 #endif // end !HAS_PORT_SET_CLR
 #else  // !USE_FAST_PINIO
   digitalWrite(swspi._sck, LOW);
-#if defined(ESP32)
-  for (volatile uint8_t i = 0; i < 1; i++)
-    ;
-#endif // end ESP32
 #endif // end !USE_FAST_PINIO
 }