diff --git a/spi.cpp b/spi.cpp
index ddc0e47..ebe0d9d 100644
--- a/spi.cpp
+++ b/spi.cpp
@@ -1,5 +1,11 @@
 #include "spi.h"
 
+//////////////////////////////////////////////////////////////////////////
+InOutPin SPI::sm_cSCK;
+InOutPin SPI::sm_cMISO;
+InOutPin SPI::sm_cMOSI;
+InOutPin SPI::sm_cSS;
+
 //////////////////////////////////////////////////////////////////////////
 void SPI::setCPOL( bool bCPOL )
 {
@@ -29,21 +35,26 @@ void SPI::setCPHA( bool bCPHA )
 //////////////////////////////////////////////////////////////////////////
 void SPI::init( ClockDiv enmClockDiv /* = ClockDiv::CLKDIV_128 */, Mode enmMode /* = Mode::MODE_0 */, bool bMaster /* = true */, bool bLSBFirst /* = false */ )
 {
+	sm_cSCK.setPin( sm_enmSCK );
+	sm_cMISO.setPin( sm_enmMISO );
+	sm_cMOSI.setPin( sm_enmMOSI );
+	sm_cSS.setPin( sm_enmSS );
+
 	if( bMaster )
 	{
-		InOut::writePin( sm_enmSS, true );
+		sm_cSS.write( true );
 
-		InOut::setPinDirection( sm_enmSCK, InOut::Dir::D_OUT, false );
-		InOut::setPinDirection( sm_enmMISO, InOut::Dir::D_IN, false );
-		InOut::setPinDirection( sm_enmMOSI, InOut::Dir::D_OUT, false );
-		InOut::setPinDirection( sm_enmSS, InOut::Dir::D_OUT, false );
+		sm_cSCK.setDirection( InOut::Dir::D_OUT, false );
+		sm_cMISO.setDirection( InOut::Dir::D_IN, false );
+		sm_cMOSI.setDirection( InOut::Dir::D_OUT, false );
+		sm_cSS.setDirection( InOut::Dir::D_OUT, false );
 	}
 	else
 	{
-		InOut::setPinDirection( sm_enmSCK, InOut::Dir::D_IN, false );
-		InOut::setPinDirection( sm_enmMISO, InOut::Dir::D_OUT, false );
-		InOut::setPinDirection( sm_enmMOSI, InOut::Dir::D_IN, false );
-		InOut::setPinDirection( sm_enmSS, InOut::Dir::D_IN, true );
+		sm_cSCK.setDirection( InOut::Dir::D_IN, false );
+		sm_cMISO.setDirection( InOut::Dir::D_OUT, false );
+		sm_cMOSI.setDirection( InOut::Dir::D_IN, false );
+		sm_cSS.setDirection( InOut::Dir::D_IN, true );
 	}
 
 	setClockDiv( enmClockDiv );
@@ -146,5 +157,5 @@ uint8_t SPI::transfer( uint8_t ui8Data )
 //////////////////////////////////////////////////////////////////////////
 void SPI::select( bool bSelect )
 {
-	InOut::writePin( sm_enmSS, !bSelect );
+	sm_cSS.write( !bSelect );
 }
\ No newline at end of file
diff --git a/spi.h b/spi.h
index 5bcff36..7e902af 100644
--- a/spi.h
+++ b/spi.h
@@ -1,7 +1,7 @@
 /*
 * Copyright (c) by BlackMark 2016-2017
 * Date 14/09/2017
-* Version 1.1
+* Version 1.2
 */
 
 #ifndef SPI_H
@@ -43,6 +43,11 @@ private:
 	static constexpr InOut::Pin sm_enmMOSI = InOut::Pin::P_B3;
 	static constexpr InOut::Pin sm_enmSS = InOut::Pin::P_B2;
 
+	static InOutPin sm_cSCK;
+	static InOutPin sm_cMISO;
+	static InOutPin sm_cMOSI;
+	static InOutPin sm_cSS;
+
 public:
 	static void init( ClockDiv enmClockDiv = ClockDiv::CLKDIV_128, Mode enmMode = Mode::MODE_0, bool bMaster = true, bool bLSBFirst = false );
 	static void setClockDiv( ClockDiv enmClockDiv );