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SPI.c

@@ -1,17 +1,99 @@
 #include "SPI.h"
 #include "MemMap.h"
 
-void INIT_SPI(void)
-{
-	RCGCSSI |= 0x01;    // SPI module 0
+unsigned long z=0;
+/*
+	SPIO Module Master
+	portA 2,3,5 used (clk,ss,TX)
+	portA 6,7 used for Nokia lcd Reset and CD
+	
+	*/
+void INIT_SPI0(void)
+{ volatile unsigned long delay;
+	RCGCSSI  |= 0x01;    // SPI module 0
+	RCGCGPIO |= 0x01;    // clock for PORT A SPI and Slave Select
+    delay=RCGCGPIO;
 
-	SPI0_SSICR1 &= ~0x02;		// disable SPI
-	SPI0_SSICR0 &= ~0xFFC0;			// CPOL & CPHA equal 0  mode 0   scr = 0
-	SPI0_SSICPSR |= 0x02;				// frequency 8MHZ
-	SPI0_SSICR0 |= 0x07;      // data = 8
-	SPI0_SSICR1 &= ~0x04;           // choose master operation
+	/*portA 2 ,  3 , 4 , 5   
+		   clk, ss , rx, tx */
+
+    GPIODATA_PORTA   = 0x0000000000;
+	GPIODIR_PORTA    =0xC0;               // PA 6,7 output 
+	GPIOAFSEL_PORTA |= 0x2C;              // Alternate function pins select 2,3,5
+	GPIOAFSEL_PORTA &= ~0xC0;             // Disable Alternate function pins 6,7
+	GPIODEN_PORTA   |= 0xEC;              // Digital enable pins 2,3,5,6,7
+    GPIOPCTL_PORTA  &= ~0x00F0FF00 ;      // Initialize PCTL
+    GPIOPCTL_PORTA  |=  0x00202200 ;      // set alternate functions SSI
+	GPIOAMSEL_PORTA  = 0x00;              // Disable analog
+
+    SPI0_SSICR1     &= ~0x02;	      	 // disable SPI	
+	SPI0_SSICR1     &= ~0x04;            // choose master operation
+    SPI0_SSICC      &= ~0x0F ;           // configure for system clock/PLL baud clock source
+	SPI0_SSICPSR    &= ~0xFF;			 // clock divider for 3.125 MHz SSIClk (50 MHz PIOSC/16)
+	SPI0_SSICPSR    |= 0x16;
+	SPI0_SSICR0     &= ~0xFFC0;	         // CPOL & CPHA equal 0  mode 0   scr = 0
+    SPI0_SSICR0     &= ~0x30 ;           // Frame select (0,0)
+	SPI0_SSICR0     |= 0x07;             // data = 8
+	SPI0_SSICR1     |= 0x02;             // enable SPI   
+}
+/*
+SPI1 Module Slave
+portF 2,3,0 (clk,ss,RX)
 
+*/
+void INIT_SPI1(void)
+{ volatile unsigned long delay;
+		RCGCSSI |= 0x02;             // SPI module 1
+		RCGCGPIO |= 0x20;            // clock for PORT F SPI and Slave Select
+        delay=RCGCGPIO;
+    /*portf 2, 3 , 0 ,1 
+		  clk, ss,rx ,tx */
+        GPIODATA_PORTF = 0x0000000000;
+        GPIOLOCK_PORTF=0x4C4F434B;        // Port F unlock
+	    GPIOCR_PORTF = 0x1F;              // Change dor pin 0
+
+	    GPIOAFSEL_PORTF |= 0xF;           // Alternate function pins select 2,3,0
+	    GPIODEN_PORTF |= 0x0F;            // Digital enable pins   2,3,0
+    	GPIOPCTL_PORTF &= ~0x0000FFFF ;   // Initialize PCTL
+        GPIOPCTL_PORTF |=  0x00002222 ;   // set alternate functions SSI
+	    GPIOAMSEL_PORTF = 0x00;           // Disable analog
 
+     	SPI1_SSICR1  &= ~0x02;	     	  // disable SPI	
+	    SPI1_SSICR1  |= 0x04;             // choose SLAVE operation
+        SPI1_SSICC   &= ~0x0F ;           // configure for system clock/PLL baud clock source
+	    SPI1_SSICPSR &= ~0xFF;			  // clock divider for 3.125 MHz SSIClk (50 MHz PIOSC/16)
+	    SPI1_SSICPSR |= 0x16;
+	    SPI1_SSICR0  &= ~0xFFC0;	   	  // CPOL & CPHA equal 0  mode 0   scr = 0
+        SPI1_SSICR0  &= ~0x30 ;           // Frame select (0,0)
+	    SPI1_SSICR0  |= 0x07;             // data = 8
+	    SPI1_SSICR1  |= 0x02;             // enable SPI  
+}
+/*
+SPI write function sending data to slave
+*/
+int SPI_Write(unsigned char data)
+{
+	unsigned char x[10];
+	unsigned char y[10] ;
+	DC=0x40;
+	while((SPI0_SSISR & 2) == 0);     // wait until FIFO not full
+	SPI0_SSIDR =data ;                // Transmit high byte
+	x[z]=SPI1_SSIDR ;                 // Matrix to check data sent 
+	while(SPI0_SSISR & 0x10);         // wait transmit complete 
+	//y[z]=SPI1_SSIDR ;
+	if(z<=9)
+	{
+	z++;
+	}
+return SPI0_SSIDR ;
+}
 
-	SPI0_SSICR1 |= 0x03;   // enable SPI   loop back enabled
+void SPI_Read()
+{
+	 int x =0 ;
+while((SPI1_SSISR & 4) == 0);         //wait until FIFO is not empty  
+x=SPI1_SSIDR ;
 }
+
+
+

SPI.h

@@ -3,9 +3,9 @@
 
 #include "MemMap.h"
 
-void INIT_SPI(void);
+void INIT_SPI0(void);
+void INIT_SPI1(void);
+void SPI_Write();
+void SPI_Read();
 
-
-
-
-#endif
+#endif	

main SPI Master Slave Modules.c

@@ -0,0 +1,20 @@
+#include "MemMap.h"
+#include "SPI.h"
+
+
+int main (void)
+{
+	unsigned long i;
+	INIT_SPI0();
+	INIT_SPI1();
+
+	while(1)
+	{
+		for(i=0;i<=100;i++)
+		{
+    SPI_Write(i);
+
+		}
+	}
+
+}