Code cleanup

Multiprotocol/SPI.ino

@@ -0,0 +1,84 @@
+/*
+ This project is free software: you can redistribute it and/or modify
+ it under the terms of the GNU General Public License as published by
+ the Free Software Foundation, either version 3 of the License, or
+ (at your option) any later version.
+
+ Multiprotocol is distributed in the hope that it will be useful,
+ but WITHOUT ANY WARRANTY; without even the implied warranty of
+ MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ GNU General Public License for more details.
+
+ You should have received a copy of the GNU General Public License
+ along with Multiprotocol.  If not, see <http://www.gnu.org/licenses/>.
+ */
+/********************/
+/**  SPI routines  **/
+/********************/
+#ifdef XMEGA
+	#define XNOP() NOP()
+#else
+	#define XNOP()
+#endif
+
+void SPI_Write(uint8_t command)
+{
+	uint8_t n=8; 
+
+	SCLK_off;//SCK start low
+	XNOP();
+	SDI_off;
+	XNOP();
+	do
+	{
+		if(command&0x80)
+			SDI_on;
+		else
+			SDI_off;
+		XNOP();
+		SCLK_on;
+		XNOP();
+		XNOP();
+		command = command << 1;
+		SCLK_off;
+		XNOP();
+	}
+	while(--n) ;
+	SDI_on;
+}
+
+uint8_t SPI_Read(void)
+{
+	uint8_t result=0,i;
+	for(i=0;i<8;i++)
+	{
+		result=result<<1;
+		if(SDO_1)
+			result |= 0x01;
+		SCLK_on;
+		XNOP();
+		XNOP();
+		NOP();
+		SCLK_off;
+		XNOP();
+		XNOP();
+	}
+	return result;
+}
+
+uint8_t SPI_SDIO_Read(void)
+{
+	uint8_t result=0;
+	SDI_input;
+	for(uint8_t i=0;i<8;i++)
+	{                    
+		result=result<<1;
+		if(SDI_1)  ///if SDIO =1 
+			result |= 0x01;
+		SCLK_on;
+		NOP();
+		SCLK_off;
+	}
+	SDI_output;
+	return result;
+}