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// ***********************************************************
// Project:
// Author:
// Module description:
// ***********************************************************

#include <avr\io.h>      // Most basic include files
#include <avr\interrupt.h> // Add the necessary ones
#include "LCD_functions.h"
#include "LCD_driver.h"
#include "LCD_global.h"

#define DDR_SPI DDRB
#define DD_MISO DDB3
#define DD_MOSI DDB2
#define DD_SCK  DDB1
#define DD_SS  DDB4
#define DD_Flash  DDB0


void SPI_MasterInit(void);
void SPI_MasterTransmit(char);
void ClockChange(void);


/************************************************************/
/*!   
   \def spi_hard_clear_ss()
   Defines a macro to clear the hardware slave select pin
   \def spi_hard_set_ss()
   Defines a macro to set the hardware slave select pin
*/
/************************************************************/
#define SS_HARDWARE_PORT PORTB
#define SS_HARDWARE_PIN PORTB4
#define SS_HARDWARE_DDR DDB4


char txbuff[]="SPIreceived";
char cData,tData;
int zz=0;j=0;

// ***********************************************************
// Main program
//
//int
main(void) {
   
             ClockChange();
             zz=0;
          cData="0";
             
                       // initialize the LCD
         LCD_Init();                 
            SPI_MasterInit();
   
 // enable global interrupt
    sei();

   
 LCD_puts("Main",1);// text to be displayed in the LCD
 
  for(zz = 0; zz < 5; zz++)
 {         LCD_puts("Transmitting",1);
        tData=txbuff[zz];
        SPI_MasterTransmit(tData);   
   }
   

LCD_puts("SEND",1);   // text to be displayed in the


while(1)
{
zz=0;
}



}




void SPI_MasterInit(void)
{
/* Set SS,MOSI and SCK output, all others input */
DDR_SPI = (0<<DD_MISO)|(1<<DD_MOSI)|(1<<DD_SS)|(1<<DD_SCK);

/* Enable SPI, Master, set clock rate fck/32 */
SPCR = (1<<SPE)|(1<<MSTR)|(1<<SPR0);
//SPSR=(1<<SPI2X);

}




void SPI_MasterTransmit(char cData)
{

/* Start transmission */
// select slave

[b][color=red]SS_HARDWARE_PORT &= (0<<SS_HARDWARE_PIN)[/color];[/b]

LCD_puts("master",1);
SPDR = cData;
/* Wait for transmission complete */
while(!(SPSR & (1<<SPIF)));


// deselect slave
[b][color=red]SS_HARDWARE_PORT |= (1<<SS_HARDWARE_PIN);[/color] [/b]


}



void ClockChange(void)
{
// boost IntRC to 8Mhz
        CLKPR = (1<<CLKPCE);     // set Clock Prescaler Change Enable
       
     // set prescaler = 4, Inter RC 8Mhz / 4 = 2Mhz
        CLKPR = (1<<CLKPS1);

}

// Select slave
SS_HARDWARE_PORT &= (0<<SS_HARDWARE_PIN);

// Select slave
SS_HARDWARE_PORT &= ~(1<<SS_HARDWARE_PIN);

/************************************************************/
/*!   
   \def spi_hard_clear_ss()
   Defines a macro to clear the hardware slave select pin
   \def spi_hard_set_ss()
   Defines a macro to set the hardware slave select pin
*/
/************************************************************/
#define SS_HARDWARE_PORT PORTB
#define SS_HARDWARE_PIN PORTB4
#define SS_HARDWARE_DDR DDB4