/*;------------------------------------------------------------------------------
; LCD display routines for Lab 5/6
;------------------------------------------------------------------------------
*/
        #include <p30f6014.h>
		#include "LCD_Display.h"

//;Initialize SPI port to communicate with the LCD display

void LCD_Display_Setup(void){
		LATGbits.LATG9 = 1; 	// Set SPI slave select pin high
		TRISGbits.TRISG9 = 0;	// and set as output
		SPI2CON = 0x003c;		// Load SPI control register with Master mode, Clk = Fosc/64, Input data sampled at middle of output time, Data clocked out on rising edge, Clk idle is low
		SPI2STAT = 0x8000; 		// Enable SPI port
		}

/* ;------------------------------------------------------------------------------
;Clear a column at X=W10 of the display
*/

void LCD_Display_ClrCol(unsigned char x){
		unsigned char counter;
		counter = 32;			// Load counter to clear pixel 32 times
		while(counter > 0){
		LCD_Display_Byte(0xd9);		// Load command to clear a pixel, Call routine to send the command to the display
		LCD_Display_Byte(x);	 	// Load X location of pixel, Call routine to send the command to the display
		LCD_Display_Byte(counter--); 	// Load Y location of pixel, Call routine to send the command to the display
		}
}
		
/* ;------------------------------------------------------------------------------
;Display a pixel at X=W10 and Y=W11
*/

void LCD_Display_Pixel(unsigned char x,unsigned char y){
		LCD_Display_Byte(0xd8);		// Load command to set a pixel, Call routine to send the command to the display
		LCD_Display_Byte(x);		// Load X location of pixel, Call routine to send the command to the display
		LCD_Display_Byte(y);		// Load Y location of pixel, Call routine to send the command to the display
		}

/* ;------------------------------------------------------------------------------
;Send W0 byte to LCD
*/

void LCD_Display_Byte(unsigned char value){
		unsigned int junk;
		LATGbits.LATG9 = 1;		// Set slave select high
		LATGbits.LATG9 = 0;		// Set slave select low for new transmission
		junk = SPI2BUF;			// Read buffer to avoid overflow
		SPI2BUF = value;		// Write the data to the output buffer
		while(!SPI2STATbits.SPIRBF); // Check if transmission complete
		}

void LCD_Display_array(int *array_ptr[]){
	unsigned char j,k;
	for (k=0; k<122; k++)
   			{
   			j = (unsigned char)array_ptr[k]/8;
			LCD_Display_ClrCol(k);		// Clear the next whole column of the display 
      		LCD_Display_Pixel(k,j);		// Set the desired pixel (k is X position, y is Y position)
			}
	}

/*;------------------------------------------------------------------------------

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;                       Software License Agreement                   ;
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*/