Hardware SPI BREAKING: unswap mode 2 and 3 for portability (#5948)

* Hardware SPI BREAKING: unswap mode 2 and 3 for portability use SPI.restoreEsp8266LegacyMode2And3() for former behaviour
esp8266 · Apr 5, 2019 · 77451d6 · 77451d6
1 parent a1796f4
commit 77451d6
Showing 1 changed file with 5 additions and 0 deletions.
diff --git a/libraries/SPI/SPI.cpp b/libraries/SPI/SPI.cpp
@@ -161,6 +161,11 @@ void SPIClass::setDataMode(uint8_t dataMode) {
     bool CPOL = (dataMode & 0x10); ///< CPOL (Clock Polarity)
     bool CPHA = (dataMode & 0x01); ///< CPHA (Clock Phase)
 
+    // https://github.com/esp8266/Arduino/issues/2416
+    // https://github.com/esp8266/Arduino/pull/2418
+    if(CPOL)          // Ensure same behavior as
+        CPHA ^= 1;    // SAM, AVR and Intel Boards
+
     if(CPHA) {
         SPI1U |= (SPIUSME);
     } else {