Initial commit to personal-uni.git

14 years ago · 8735bab98f
commit 8735bab98f
617 changed files with 441450 additions and 0 deletions
--- a/ee2a/lab1/circuit_diagram.png
+++ b/ee2a/lab1/circuit_diagram.png
--- a/ee2a/lab1/circuit_diagram.svg
+++ b/ee2a/lab1/circuit_diagram.svg
--- a/ee2a/lab2/counter_FSM.PLD
+++ b/ee2a/lab2/counter_FSM.PLD
@ -0,0 +1,71 @@
+Name      counter_FSM;
+Partno    tick;
+Date      7th November 2006;
+Revision  003;
+Designer  Ben Francis, Sam Black, Sam Burras;
+Company   University of Birmingham;
+Assembly  1;
+Location  Earth;
+Device    P18CV8;
+Format    JEDEC;
+
+/**********************************************************************/
+/* This design uses a PEEL18CV8 in order to implement a 4-bit counter */
+/*                                                                    */
+/* Device pin Layout         ___________                              */
+/*                    CLOCK |1   \/   20| Vcc (power supply)          */
+/*                    JAM_A |2        19| CLK                         */
+/*                    JAM_B |3        18| QA                          */
+/*                    JAM_C |4        17| QB                          */
+/*                    JAM_D |5        16| QC                          */
+/*               JAM_ENABLE |6        15| QD                          */
+/*                        S |7        14| Z                           */
+/*                        R |8        13|                             */
+/*                          |9        12|                             */
+/*                      GND |10       11|                             */
+/*                          |___________|                             */
+/*                                                                    */
+/**********************************************************************/
+
+
+/* Pin Assignments */
+/* Inputs */
+Pin 1 = CLOCK;
+Pin 2 = JAM_A;
+Pin 3 = JAM_B;
+Pin 4 = JAM_C;
+Pin 5 = JAM_D;
+Pin 6 = JAM_ENABLE;
+Pin 7 = S;
+Pin 8 = R;
+
+/* Ouputs */
+Pin 14 = Z;
+Pin 15 = QD;
+Pin 16 = QC;
+Pin 17 = QB;
+Pin 18 = QA;
+Pin 19 = CLK;
+
+/* Boolean algebra */
+QA.D = !QD & !QC & !JAM_ENABLE
+       # QD & !QA & !JAM_ENABLE
+       # QB & !JAM_ENABLE
+       # JAM_ENABLE & JAM_A;
+
+QB.D = !QA & !QB & !JAM_ENABLE
+       # QD & !QA & !JAM_ENABLE
+       # JAM_ENABLE & JAM_B;
+
+QC.D = QC & QA & !JAM_ENABLE
+       # !QC & !QA & !JAM_ENABLE
+       # JAM_ENABLE & JAM_C;
+
+QD.D = QD & QC & !JAM_ENABLE
+       # QA & !QC & !JAM_ENABLE
+       # !QD & QB & !QA & !JAM_ENABLE
+       # JAM_ENABLE & JAM_D;
+
+Z = QD & QC & !QB & QA;
+
+CLK = S # CLK & !R;
--- a/ee2a/lab2/counter_FSM.si
+++ b/ee2a/lab2/counter_FSM.si
@ -0,0 +1,68 @@
+Name      counter_FSM;
+Partno    tick;
+Date      7th November 2006;
+Revision  003;
+Designer  Ben Francis, Sam Black, Sam Burras;
+Company   University of Birmingham;
+Assembly  1;
+Location  Earth;
+Device    P18CV8;
+Format    JEDEC;
+
+/**********************************************************************/
+/* This design uses a PEEL18CV8 in order to implement a 4-bit counter */
+/*                                                                    */
+/* Device pin Layout         ___________                              */
+/*                    CLOCK |1   \/   20| Vcc (power supply)          */
+/*                    JAM_A |2        19| CLK                         */
+/*                    JAM_B |3        18| QA                          */
+/*                    JAM_C |4        17| QB                          */
+/*                    JAM_D |5        16| QC                          */
+/*               JAM_ENABLE |6        15| QD                          */
+/*                        S |7        14| Z                           */
+/*                        R |8        13|                             */
+/*                          |9        12|                             */
+/*                      GND |10       11|                             */
+/*                          |___________|                             */
+/*                                                                    */
+/**********************************************************************/
+
+/* ORDER STATEMENT */
+Order: CLOCK,%1,JAM_D,%1,JAM_C,%1,JAM_B,%1,JAM_A,%1,JAM_ENABLE,%2,QD,%1,QC,%1,QB,%1,QA,%1,Z;
+
+/* TEST VECTORS */
+Vectors:
+
+/* Allowed States */
+C 1 1 0 1 1  H H L H H  /* 13 */
+C X X X X 0  H H L L L  /* 12 */
+C X X X X 0  H L H H L  /* 11 */
+C X X X X 0  H L L H L  /* 9  */
+C X X X X 0  H L L L L  /* 8  */
+C X X X X 0  L H H H L  /* 7  */
+C X X X X 0  L H L H L  /* 5  */
+C X X X X 0  L H L L L  /* 4  */
+C X X X X 0  L L H L L  /* 2  */
+C X X X X 0  H H L H H  /* 13 */
+
+/* Not Allowed States */
+C 1 1 1 1 1  H H H H L  /* 15 */
+C X X X X 0  H H L H H /* 13 */
+
+C 1 1 1 0 1  H H H L L  /* 14 */
+C X X X X 0  H L H H L  /* 11 */
+
+C 0 0 1 1 1  L L H H L  /* 3  */
+C X X X X 0  H L L H L  /* 9  */
+
+C 0 1 1 0 1  L H H L L  /* 6  */
+C X X X X 0  H L L H L  /* 9  */
+
+C 0 0 0 1 1  L L L H L  /* 1  */
+C X X X X 0  H L L H L  /* 9  */
+
+C 0 0 0 0 1  L L L L L  /* 0  */
+C X X X X 0  L H H H L  /* 7  */
+
+C 1 0 1 0 1  H L H L L  /* 10 */
+C X X X X 0  L H H H L  /* 7  */
--- a/ee2a/lab3/stepper_motor.c
+++ b/ee2a/lab3/stepper_motor.c
@ -0,0 +1,92 @@
+#include <16F648A.h>
+#use delay(clock=4000000)
+#fuses NOWDT, INTRC_IO, NOPUT, NOPROTECT, NOLVP, NOMCLR
+
+void main()
+{
+   struct input_pin_map {
+      boolean anticlockwise;
+      boolean clockwise;
+      boolean speed1;
+      boolean speed2;
+      int unused: 4;
+   };
+
+   struct output_pin_map {
+      int motor1: 4;
+      int unused: 4;
+
+   };
+
+   int speed=500, i=0;
+   boolean direction=0;
+   struct input_pin_map buttons;
+   struct input_pin_map buttons_setup;
+   struct output_pin_map motor;
+   struct output_pin_map motor_setup;
+
+   // lookup table
+   int const FULL_LOOKUP_TABLE[4] = {
+      0x07, 0x06, 0x08, 0x09
+   };
+
+   int const HALF_LOOKUP_TABLE[8] = {
+      0x01, 0x09, 0x0A, 0x02, 0x06, 0x04, 0x05
+   };
+
+
+   #byte buttons=0x05         // assign buttons to port a
+   #byte motor=0x06           // assign motor to port b
+   #byte buttons_setup=0x85   // assign buttons_setup for port a TRIS
+   #byte motor_setup=0x86     // assign motor_setup for port b TRIS
+
+   motor_setup.motor1=0;            // set as Output
+   buttons_setup.anticlockwise=1;   // set as Input
+   buttons_setup.clockwise=1;       // set as Input
+   buttons_setup.speed1=1;           // set as Input
+   buttons_setup.speed2=1;           // set as Input
+
+
+   setup_timer_0(RTCC_INTERNAL|RTCC_DIV_1);
+
+   while (1) {                              // REPEAT indefinitely
+
+      //determine if a button has been pressed
+      if((buttons.anticlockwise==FALSE || buttons.clockwise==FALSE) && !(buttons.anticlockwise==FALSE && buttons.clockwise==FALSE)) {
+         
+         if(buttons.speed1==FALSE && buttons.speed2==FALSE)
+            speed=40;
+         else if(buttons.speed1==FALSE && buttons.speed2=TRUE)
+            speed=20;
+         else if(buttons.speed1==TRUE && buttons.speed2==FALSE)
+            speed=10;
+         else if(buttons.speed1==TRUE && buttons.speed2==TRUE)
+            speed=5;
+         else
+            speed=250;
+
+         // determine which button was pressed
+         if(buttons.clockwise==FALSE)
+            direction=1;
+         else if (buttons.anticlockwise==FALSE)
+            direction=0;
+
+         for(i=0;i<100;i++)   {              // REPEAT 100 times
+            if(direction==1) {               // IF button 'C' was pressed THEN
+               //rotate the motor shaft clockwise
+               motor.motor1 = HALF_LOOKUP_TABLE[i%4];
+            }
+            else if(direction==0) {          // OTHERWISE
+               //rotate the motor shaft anti-clockwise
+               motor.motor1 = HALF_LOOKUP_TABLE[3-(i%4)];
+            }
+
+            Delay_ms(speed);              //insert time delay of one step period
+         }
+     }
+     else
+      motor.motor1 = 0x00;
+
+   }
+}
+
--- a/ee2a/lab3/stepper_motor_full.c
+++ b/ee2a/lab3/stepper_motor_full.c
@ -0,0 +1,72 @@
+#include <16F648A.h>
+#use delay(clock=4000000)
+#fuses NOWDT, INTRC_IO, NOPUT, NOPROTECT, NOLVP, NOMCLR
+
+void main()
+{
+   struct input_pin_map {
+      boolean anticlockwise;
+      boolean clockwise;
+      int unused: 6;
+   };
+
+   struct output_pin_map {
+      int motor1: 4;
+      int unused: 4;
+
+   };
+
+   int speed=1, i=0;
+   boolean direction=0;
+   struct input_pin_map buttons;
+   struct input_pin_map buttons_setup;
+   struct output_pin_map motor;
+   struct output_pin_map motor_setup;
+
+   // lookup table
+   int const FULL_LOOKUP_TABLE[4] = {
+      0x07, 0x06, 0x08, 0x09
+   };
+
+
+   #byte buttons=0x05         // assign buttons to port a
+   #byte motor=0x06           // assign motor to port b
+   #byte buttons_setup=0x85   // assign buttons_setup for port a TRIS
+   #byte motor_setup=0x86     // assign motor_setup for port b TRIS
+
+   motor_setup.motor1=0;            // set as Output
+   buttons_setup.anticlockwise=1;   // set as Input
+   buttons_setup.clockwise=1;       // set as Input
+
+
+   setup_timer_0(RTCC_INTERNAL|RTCC_DIV_1);
+
+   while (1) {                               // REPEAT indefinitely
+
+      //determine if a button has been pressed
+      if((buttons.anticlockwise==FALSE || buttons.clockwise==FALSE) && !(buttons.anticlockwise==FALSE && buttons.clockwise==FALSE)) {   
+         // determine which button was pressed
+         if(buttons.clockwise==FALSE)   
+            direction=1;
+         else if (buttons.anticlockwise==FALSE)
+            direction=0;
+ 
+         for(i=0;i<100;i++)   {              // REPEAT 100 times
+            if(direction==1) {               // IF button 'C' was pressed THEN
+               //rotate the motor shaft clockwise
+               motor.motor1 = FULL_LOOKUP_TABLE[i%4];
+            }
+            else if(direction==0) {          // OTHERWISE
+               //rotate the motor shaft anti-clockwise
+               motor.motor1 = FULL_LOOKUP_TABLE[3-(i%4)];
+            }
+        
+            Delay_ms(20*speed);              //insert time delay of one step period
+         } 
+     }
+     else
+      motor.motor1 = 0x00;
+ 
+   }
+}
+
--- a/ee2a/lab3/stepper_motor_half.c
+++ b/ee2a/lab3/stepper_motor_half.c
@ -0,0 +1,123 @@
+/**********************************************************************/
+/*    Sam Black, Sam Burras and Ben Francis                           */
+/*    18/01/07  stepper_motor_half.c   Fuse: INTRC RA6-IO             */
+/*                                                                    */
+/*    Stepper motor controller for the 16F648A.h PIC                  */
+/*    Using half step with variable speed                             */
+/*                                                                    */
+/* Device pin Layout         ___________                              */
+/*                Speed MSB |1   \/   18| Input clockwise             */
+/*                Speed LSB |2        17| Input anticlockwise         */
+/*                          |3        16|                             */
+/*                          |4        15|                             */
+/*                      V++ |5        14| 0V                          */
+/*              Motor pin 1 |6        13|                             */
+/*              Motor pin 2 |7        12|                             */
+/*              Motor pin 3 |8        11|                             */
+/*              Motor pin 4 |9        10|                             */
+/*                          |___________|                             */
+/*                                                                    */
+/**********************************************************************/
+
+#include <16F648A.h>
+#use delay(clock=4000000)
+#fuses NOWDT, INTRC_IO, NOPUT, NOPROTECT, NOLVP, NOMCLR
+
+void main()
+{
+   /* Input pin map */
+   struct input_pin_map {
+      boolean anticlockwise;
+      boolean clockwise;
+      int speed: 2;
+      int unused: 4;
+   };
+
+   /* Output pin map */
+   struct output_pin_map {
+      int motor1: 4;
+      int unused: 4;
+
+   };
+
+   int speed=0;   //delay in ms
+   int i=0;
+   boolean direction=0;
+   struct input_pin_map buttons;
+   struct input_pin_map buttons_setup;
+   struct output_pin_map motor;
+   struct output_pin_map motor_setup;
+
+   // lookup table
+   int const FULL_LOOKUP_TABLE[4] = {
+      0x07, 0x06, 0x08, 0x09
+   };
+
+   int const HALF_LOOKUP_TABLE[8] = {
+      0x08, 0x0C, 0x04, 0x06, 0x02, 0x03, 0x01, 0x09
+   };
+
+   #byte buttons=0x05         // assign buttons to port a
+   #byte motor=0x06           // assign motor to port b
+   #byte buttons_setup=0x85   // assign buttons_setup for port a TRIS
+   #byte motor_setup=0x86     // assign motor_setup for port b TRIS
+
+   motor_setup.motor1=0;            // set as Output
+   buttons_setup.anticlockwise=1;   // set as Input
+   buttons_setup.clockwise=1;       // set as Input
+   buttons_setup.speed=1;           // set as Input
+
+
+   setup_timer_0(RTCC_INTERNAL|RTCC_DIV_1);
+
+   while (1) {                              // REPEAT indefinitely
+
+      //determine if a button has been pressed
+      if((buttons.anticlockwise==FALSE || buttons.clockwise==FALSE) && !(buttons.anticlockwise==FALSE && buttons.clockwise==FALSE)) {
+
+         // read speed setting from PORT A pins 2 & 3. Pin 2 is the MSB.
+         switch(buttons.speed) {
+            case 0x00:
+               speed = 16;
+               break;
+            case 0x01:
+               speed = 8;
+               break;
+            case 0x02:
+               speed = 4;
+               break;
+            case 0x03:
+               speed = 2;
+               break;
+            default:
+               speed = 200;
+               break;
+         }
+
+
+         // determine which button was pressed
+         if(buttons.clockwise==FALSE)
+            direction=1;
+         else if (buttons.anticlockwise==FALSE)
+            direction=0;
+
+         for(i=0;i<200;i++) {                // REPEAT 100 times
+            if(direction==1) {               // IF button 'C' was pressed THEN
+               //rotate the motor shaft clockwise
+               motor.motor1 = HALF_LOOKUP_TABLE[i%8];
+            }
+            else if(direction==0) {          // OTHERWISE
+               //rotate the motor shaft anti-clockwise
+               motor.motor1 = HALF_LOOKUP_TABLE[7-(i%8)];
+            }
+
+            delay_ms(speed);              //insert time delay of one step period
+         }
+     }
+     else
+     /* Don't move the rotor */
+        motor.motor1 = 0x00;
+
+   }
+}
+
--- a/ee2a/lab4/4bit/LCD_4BIT.H
+++ b/ee2a/lab4/4bit/LCD_4BIT.H
@ -0,0 +1,140 @@
+/* LCD 4-bit driver
+ *
+ * Authors: Sam Black, Sam Burras, Ben Francis
+ *
+ * Derived from Custom Computer Services
+ * (C) Copyright 1996, 2003 LCD.C
+ *
+ * Version 1.0  Date: 07/02/07
+ *
+ */
+
+struct lcd_pin_map {
+   boolean rs;
+   boolean rw;
+   boolean enable;
+   boolean button;
+   int data : 4;
+};
+
+/* Create structs to map I/O */
+struct lcd_pin_map lcd;
+struct lcd_pin_map lcd_dir;
+
+/* Set ports up correctly */
+#byte lcd=0x06
+#byte lcd_dir=0x86
+
+/* Send initialization sequence */
+/* No cursor */
+byte CONST lcd_init_nocursor[4] = {0x28, 0x0C, 0x01, 0x06};
+/* Cursor */
+byte CONST lcd_init_cursor[4] = {0x28, 0x0E, 0x01, 0x06};
+/* Scrolling */
+byte CONST lcd_init_scrolling[4] = {0x20, 0x0C, 0x01, 0x05};
+
+/* Set direction of pins to send chars to LCD */
+/* RS, RW, ENABLE, BUTTON, DATA */
+struct lcd_pin_map CONST lcd_write = {0, 0, 0, 1, 0};
+
+/* Set direction of pins to read status from LCD */
+struct lcd_pin_map CONST lcd_read = {1, 0, 0, 1, 1};
+
+/* Based on lcd.c */
+void lcd_send_nibble( byte n ) {
+
+      lcd.enable = 1;
+      delay_us(50);
+      lcd.data = n;
+      delay_ms(1);
+      lcd.enable = 0;
+      delay_us(50);
+}
+
+/* Based on lcd.c */
+void lcd_send_byte( byte address, byte n ) {
+
+/* Set port direction */
+      lcd_dir = lcd_write;
+/* Set what we are writing to */
+/* 0 is Instruction */
+/* 1 is Data */
+      lcd.rs = address;
+/* Write to LCD */
+      lcd.rw = 0;
+      delay_us(500);
+	  lcd_send_nibble(n>>4);
+	  delay_ms(1);
+	  lcd_send_nibble(n & 0xf);
+/* Reset RW/RS */
+      lcd.rw = 1;
+      lcd.rs = 0;
+      delay_us(500);
+
+}
+
+/* Based on lcd.c */
+boolean lcd_read_status() {
+
+      boolean status;
+/* Set port direction */
+      lcd_dir = lcd_read;
+/* Read from the LCD */
+      lcd.rw = 1;
+      delay_us(1);
+      lcd.enable = 1;
+      delay_us(1);
+      status = lcd.rs;
+      lcd.enable = 0;
+      delay_us(2);
+/* Return the status */
+      return(status);
+}
+
+/* Based on lcd.c */
+void lcd_init(int init) {
+
+    int i;
+
+    lcd_dir = lcd_write;
+    lcd.rs = 0;
+    lcd.rw = 0;
+    lcd.enable = 0;
+    delay_ms(15);
+
+    for(i=0; i<=3; i++) {
+       lcd_send_nibble(0x03);
+       delay_ms(5);
+    }
+
+	/* Semd extra init nibble */
+	lcd_send_nibble(0x02);
+	delay_ms(5);
+
+	switch (init) {
+		case 1 :	for(i=0; i<=3; i++)
+       					lcd_send_byte(0, lcd_init_nocursor[i]);	break;
+       	case 2 :	for(i=0; i<=3; i++)
+       					lcd_send_byte(0, lcd_init_cursor[i]); break;
+       	case 3 :	for(i=0; i<=3; i++)
+       	       			lcd_send_byte(0, lcd_init_scrolling[i]); break;
+		default :	for(i=0; i<=3; i++)
+       					lcd_send_byte(0, lcd_init_nocursor[i]); break;
+	}
+}
+
+/* Based on lcd.c */
+void lcd_putc( char c ) {
+   switch (c) {
+   /* clear the screen */
+      case '\f'   : lcd_send_byte(0, 0x01);
+                  		delay_ms(2);            break;
+   /* back space */
+      case '\b'   : lcd_send_byte(0, 0x08);     break;
+   /* new line */
+      case '\n'   : lcd_send_byte(0, 0xC0);     break;
+
+      default     : lcd_send_byte(1, c);        break;
+   }
+}
+
--- a/ee2a/lab4/4bit/lcd_display.BAK
+++ b/ee2a/lab4/4bit/lcd_display.BAK
@ -0,0 +1,107 @@
+/* LCD string program
+ * This program sends strings to an LCD via the 8 or 4 bit driver
+ * included in the header.
+ */
+
+#include <16F648A.h>
+#include <string.h>
+#use delay(clock=4000000)
+#fuses NOWDT, INTRC_IO, NOPUT, NOPROTECT, NOLVP, NOMCLR
+#include "LCD_4BIT.H"
+
+char INITMESSAGE[16] = "How can I help?";
+char MESSAGE1[16] = "The answer?";
+char MESSAGE2[16] = "Forty Two.";
+char MESSAGE3[16] = "  ?noitseuQ ehT";
+//char MESSAGE3[16] = {'T','h','e',' ','q','u','e','s','t','i','o','n','?',' ',' '};
+
+void send_string(int delay, char string[])
+{
+   int i;
+
+/* send the string */
+   for(i=0; string[i] != '\0'; i++)
+   {
+      lcd_putc(string[i]);
+      delay_ms(delay);
+   }
+}
+
+void send_string_reverse(int delay, char string[])
+{
+   int i;
+
+/* send the string */
+   for(i=14; i>=0; i--)
+   {
+      lcd_putc(string[i]);
+      delay_ms(delay);
+   }
+}
+
+int main(void)
+{
+/* Init the Display */
+   lcd_init(2);
+/* Clear the screen */
+   lcd_putc('\f');
+/* Send the message */
+   send_string(5, INITMESSAGE);
+
+/* Display on the first line after button press */
+   while(lcd.button == 1)
+   { }
+   lcd_putc('\f');
+   send_string(1000, MESSAGE1);
+
+   while(lcd.button == 1)
+   { }
+   lcd_putc('\f');
+   /* New line */
+   lcd_putc('\n');
+   send_string(5, MESSAGE2);
+   /* Add delay for button debouncing */
+   delay_ms(500);
+   
+   /*wait for button press*/
+   while(lcd.button == 1)
+   { }
+   /* Re-initialise the display to scroll */
+   lcd_init(3);
+   
+   while(1) {
+     send_string(200, MESSAGE3);
+/*
+      lcd_putc('?');
+      delay_ms(200);
+      lcd_putc('n');
+      delay_ms(200);
+      lcd_putc('o');
+      delay_ms(200);
+      lcd_putc('i');
+      delay_ms(200);
+      lcd_putc('t');
+      delay_ms(200);
+      lcd_putc('s');
+      delay_ms(200);
+      lcd_putc('e');
+      delay_ms(200);
+      lcd_putc('u');
+      delay_ms(200);
+      lcd_putc('q');
+      delay_ms(200);
+      lcd_putc(' ');
+      delay_ms(200);
+      lcd_putc('e');
+      delay_ms(200);
+      lcd_putc('h');
+      delay_ms(200);
+      lcd_putc('T');
+      delay_ms(200);
+      lcd_putc(' ');
+      delay_ms(200);
+*/
+   }
+   
+   return 0;
+}
--- a/ee2a/lab4/4bit/lcd_display.PJT
+++ b/ee2a/lab4/4bit/lcd_display.PJT
@ -0,0 +1,38 @@
+[PROJECT]
+Target=lcd_display.HEX
+Development_Mode=2
+Processor=0x648A
+ToolSuite=CCS
+
+[Directories]
+Include=
+Library=
+LinkerScript=
+
+[Target Data]
+FileList=Y:\Year 2\EE2A\PIC-LCD\4bit\lcd_display.c
+BuildTool=C-COMPILER
+OptionString=+FM
+AdditionalOptionString=
+BuildRequired=1
+
+[lcd_display.c]
+Type=4
+Path=
+FileList=
+BuildTool=
+OptionString=
+AdditionalOptionString=
+
+[mru-list]
+1=Y:\YEAR2~1\EE2A\PIC-LCD\4bit\LCD_DI~1.C
+
+[Windows]
+0=0000 Y:\YEAR2~1\EE2A\PIC-LCD\4bit\LCD_DI~1.C 0 0 796 451 3 0
+
+[Opened Files]
+1=Y:\Year 2\EE2A\PIC-LCD\4bit\lcd_display.c
+2=
+[Units]
+Count=1
+1=Y:\Year 2\EE2A\PIC-LCD\4bit\lcd_display.c (main)
--- a/ee2a/lab4/4bit/lcd_display.cof
+++ b/ee2a/lab4/4bit/lcd_display.cof
--- a/ee2a/lab4/4bit/lcd_display.cof.txt
+++ b/ee2a/lab4/4bit/lcd_display.cof.txt
--- a/ee2a/lab4/4bit/lcd_display.err
+++ b/ee2a/lab4/4bit/lcd_display.err
@ -0,0 +1,2 @@
+No Errors
+      0 Errors,  0 Warnings.
--- a/ee2a/lab4/4bit/lcd_display.hex
+++ b/ee2a/lab4/4bit/lcd_display.hex
@ -0,0 +1,59 @@
+:1000000000308A000A2900000A108A100A118207AB
+:1000100028340C34013406340A108A100A1182077D
+:1000200028340E34013406340A108A100A1182076B
+:1000300020340C34013405346A308400000803197C
+:1000400030280130F800F701F70B2428F80B23289B
+:100050004A30F700F70B2A2800000000800B212807
+:10006000003406151030F700F70B34280000690E35
+:10007000F039F7000F300605770486000130EA00FA
+:100080001C2006111030F700F70B44280000003444
+:100090000830831686008312661C06106618061444
+:1000A0008610A630F700F70B53280000670EE80013
+:1000B0000F30E8056808E90031200130EA001C2013
+:1000C00067080F39E800E900312086140610A630D1
+:1000D000F700F70B6928000000340830831686000B
+:1000E00083120610861006110F30EA001C20E20170
+:1000F0006208033C031C84280330E90031200530EA
+:10010000EA001C20E20A78280230E900312005309C
+:10011000EA001C206108013A03199528033A0319E3
+:10012000A428013A0319B328C228E2016208033C5B
+:10013000031CA32862080420E300E6016308E7002B
+:100140004820E20A9628D128E2016208033C031CF9
+:10015000B22862080C20E300E6016308E7004820AB
+:10016000E20AA528D128E2016208033C031CC12849
+:1001700062081420E300E6016308E7004820E20A71
+:10018000B428D128E2016208033C031CD02862088D
+:100190000420E300E6016308E7004820E20AC328E0
+:1001A000D128003465080C3A0319DD28043A0319F4
+:1001B000E528023A0319EA28EF28E6010130E700B2
+:1001C00048200230EA001C20F528E6010830E7004C
+:1001D0004820F528E601C030E7004820F528013026
+:1001E000E6006508E7004820F5280034E3016208CE
+:1001F00063078400800803190929620863078400E3
+:100200000008E400E500D2206108EA001C20E30AAF
+:10021000F728003484011F30830507309F00A001B8
+:100220004830A1006F30A2007730A3002030A40036
+:100230006330A5006130A6006E30A7002030A80012
+:100240004930A9002030AA006830AB006530AC000E
+:100250006C30AD007030AE003F30AF00B0015430B4
+:10026000B1006830B2006530B3002030B4006130B6
+:10027000B5006E30B6007330B7007730B800653027
+:10028000B9007230BA003F30BB00BC01BD01BE01F5
+:10029000BF01C0014630C1006F30C2007230C300E0
+:1002A0007430C4007930C5002030C6005430C70017
+:1002B0007730C8006F30C9002E30CA00CB01CC01A6
+:1002C000CD01CE01CF01D0012030D100D2003F308E
+:1002D000D3006E30D4006F30D5006930D600743052
+:1002E000D7007330D8006530D9007530DA0051304E
+:1002F000DB002030DC006530DD006830DE0054308B
+:10030000DF00E0010230E1006D200C30E500D2207A
+:100310000530E1002130E200F62086198D290C30ED
+:10032000E500D220E830E1003130E200F620861905
+:1003300097290C30E500D2200A30E500D2200530A4
+:10034000E1004130E200F6200230E100FA30EA003C
+:100350001C20E10BA6298619AB290330E1006D2092
+:10036000C830E1005130E200F620B0290030F8003A
+:02037000630028
+:02400E00583F19
+:00000001FF
+;PIC16F648A
--- a/ee2a/lab4/4bit/lcd_display.lst
+++ b/ee2a/lab4/4bit/lcd_display.lst
--- a/ee2a/lab4/4bit/lcd_display.scp
+++ b/ee2a/lab4/4bit/lcd_display.scp
@ -0,0 +1,145 @@
+[Global]
+Fuse0=16216
+Fuse1=16383
+Fuse2=16383
+Fuse3=16383
+Fuse4=16383
+Fuse5=16383
+Fuse6=16383
+Fuse7=16383
+Fuse8=16383
+Fuse9=16383
+Fuse10=16383
+Fuse11=16383
+Fuse12=16383
+Fuse13=16383
+Fuse14=16383
+Fuse15=16383
+Fuse16=16383
+Fuse17=16383
+Fuse18=16383
+Fuse19=16383
+Fuse20=16383
+Fuse21=16383
+Fuse22=16383
+Fuse23=16383
+Fuse24=16383
+Fuse25=16383
+Fuse26=16383
+Fuse27=16383
+Fuse28=16383
+Fuse29=16383
+Fuse30=16383
+Fuse31=16383
+Fuse32=16383
+Fuse33=16383
+Fuse34=16383
+Fuse35=16383
+Fuse36=16383
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+Fuse38=16383
+Fuse39=16383
+Fuse40=16383
+Fuse41=16383
+Fuse42=16383
+Fuse43=16383
+Fuse44=16383
+Fuse45=16383
+Fuse46=16383
+Fuse47=16383
+Fuse48=16383
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+Fuse50=16383
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+Fuse54=16383
+Fuse55=16383
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+Fuse60=16383
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+Fuse62=16383
+Fuse63=16383
+Fuse64=16383
+Fuse65=16383
+Fuse66=16383
+Fuse67=16383
+Fuse68=16383
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+Fuse70=16383
+Fuse71=16383
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+Fuse73=16383
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+Fuse89=16383
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+Fuse92=16383
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+Fuse95=16383
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+Fuse100=16383
+Fuse101=16383
+Fuse102=16383
+Fuse103=16383
+Fuse104=16383
+Fuse105=16383
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+Fuse107=16383
+Fuse108=16383
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+Fuse110=16383
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+Fuse120=16383
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+Fuse122=16383
+Fuse123=16383
+Fuse124=16383
+Fuse125=16383
+Fuse126=16383
+Fuse127=16383
+QPM=0
+VAW=1
+ProcType=16F648A
+EEFileName=
+UD0=15
+UD1=15
+UD2=15
+UD3=15
+icsp=0
+idtype=0
+prid=0
+pridstart=0
+pridlength=4
+pridseq=0
+progseq=63
+pridstring=
--- a/ee2a/lab4/4bit/lcd_display.sta
+++ b/ee2a/lab4/4bit/lcd_display.sta
@ -0,0 +1,40 @@
+
+ROM used: 441 (11%)
+          441 (11%) including unused fragments
+
+          0 Average locations per line
+          2 Average locations per statement
+
+RAM used: 71 (41%) at main() level
+          80 (46%) worst case
+
+Lines Stmts  %   Files
+----- ----- ---  -----
+  108    28  13  Y:\Year 2\EE2A\PIC-LCD\4bit\lcd_display.c
+  203     0   0  C:\Program Files\PICC\devices\16F648A.h
+  417   126  52  C:\Program Files\PICC\drivers\string.h
+   28     0   0  C:\Program Files\PICC\drivers\stddef.h
+   28     0   0  C:\Program Files\PICC\drivers\ctype.h
+  133    59  16  Y:\Year 2\EE2A\PIC-LCD\4bit\LCD_4BIT.H
+----- -----
+ 1834   426 Total
+
+Page ROM  %  RAM  Functions:
+---- --- --- ---  ----------
+0     21   5   1  @delay_ms1
+0      8   2   0  @const131
+0      8   2   0  @const133
+0      8   2   0  @const135
+0     23   5   1  lcd_send_nibble
+0     37   8   3  lcd_send_byte
+0    101  23   3  lcd_init
+0     36   8   1  lcd_putc
+0     20   5   4  send_string
+0    175  40   1  main
+
+ Segment   Used  Free
+---------  ----  ----
+00000-00003     4  0  
+00004-007FF   437  1607  
+00800-00FFF     0  2048  
+
--- a/ee2a/lab4/4bit/lcd_display.sym
+++ b/ee2a/lab4/4bit/lcd_display.sym
@ -0,0 +1,70 @@
+006     lcd
+015     CCP_1_LOW
+015-016 CCP_1
+016     CCP_1_HIGH
+01F.6   C1OUT
+01F.7   C2OUT
+020     strtok.save
+021-030 INITMESSAGE
+031-040 MESSAGE1
+041-050 MESSAGE2
+051-060 MESSAGE3
+061     send_string.delay
+061     lcd_init.init
+061     main.@SCRATCH
+062     send_string.string
+062     lcd_init.i
+063     send_string.i
+063     lcd_init.@SCRATCH
+064     send_string.@SCRATCH
+065     lcd_putc.c
+066     lcd_send_byte.address
+067     lcd_send_byte.n
+068     lcd_send_byte.@SCRATCH
+069     lcd_send_nibble.n
+06A     @delay_ms1.P1
+077     @SCRATCH
+078     @SCRATCH
+078     _RETURN_
+079     @SCRATCH
+07A     @SCRATCH
+07B     @SCRATCH
+086     lcd_dir
+
+001C  @delay_ms1
+0004  @const131
+000C  @const133
+0014  @const135
+0031  lcd_send_nibble
+0048  lcd_send_byte
+006D  lcd_init
+00D2  lcd_putc
+00F6  send_string
+010A  main
+010A  @cinit
+
+Project Files:
+    Y:\Year 2\EE2A\PIC-LCD\4bit\lcd_display.c
+    C:\Program Files\PICC\devices\16F648A.h
+    C:\Program Files\PICC\drivers\string.h
+    C:\Program Files\PICC\drivers\stddef.h
+    C:\Program Files\PICC\drivers\ctype.h
+    Y:\Year 2\EE2A\PIC-LCD\4bit\LCD_4BIT.H
+
+Units:
+    Y:\Year 2\EE2A\PIC-LCD\4bit\lcd_display.c (main)
+
+Compiler Settings:
+    Processor:      PIC16F648A
+    Pointer Size:   8
+    Opt Level:      9
+    Short,Int,Long: 1,8,16
+
+Output Files:
+    Errors:      Y:\Year 2\EE2A\PIC-LCD\4bit\lcd_display.err
+    INHX8:       Y:\Year 2\EE2A\PIC-LCD\4bit\lcd_display.hex
+    Symbols:     Y:\Year 2\EE2A\PIC-LCD\4bit\lcd_display.sym
+    List:        Y:\Year 2\EE2A\PIC-LCD\4bit\lcd_display.lst
+    Debug/COFF:  Y:\Year 2\EE2A\PIC-LCD\4bit\lcd_display.cof
+    Call Tree:   Y:\Year 2\EE2A\PIC-LCD\4bit\lcd_display.tre
+    Statistics:  Y:\Year 2\EE2A\PIC-LCD\4bit\lcd_display.sta
--- a/ee2a/lab4/4bit/lcd_display.tre
+++ b/ee2a/lab4/4bit/lcd_display.tre
@ -0,0 +1,292 @@
+ÀÄlcd_display
+   ÀÄmain  0/175  Ram=1
+      ÃÄ??0??
+      ÃÄlcd_init  0/101  Ram=3
+      ³  ÃÄ@delay_ms1  0/21  Ram=1
+      ³  ÃÄlcd_send_nibble  0/23  Ram=1
+      ³  ³  ÀÄ@delay_ms1  0/21  Ram=1
+      ³  ÃÄ@delay_ms1  0/21  Ram=1
+      ³  ÃÄlcd_send_nibble  0/23  Ram=1
+      ³  ³  ÀÄ@delay_ms1  0/21  Ram=1
+      ³  ÃÄ@delay_ms1  0/21  Ram=1
+      ³  ÃÄ@const131  0/8  Ram=0
+      ³  ÃÄlcd_send_byte  0/37  Ram=3
+      ³  ³  ÃÄlcd_send_nibble  0/23  Ram=1
+      ³  ³  ³  ÀÄ@delay_ms1  0/21  Ram=1
+      ³  ³  ÃÄ@delay_ms1  0/21  Ram=1
+      ³  ³  ÀÄlcd_send_nibble  0/23  Ram=1
+      ³  ³     ÀÄ@delay_ms1  0/21  Ram=1
+      ³  ÃÄ@const133  0/8  Ram=0
+      ³  ÃÄlcd_send_byte  0/37  Ram=3
+      ³  ³  ÃÄlcd_send_nibble  0/23  Ram=1
+      ³  ³  ³  ÀÄ@delay_ms1  0/21  Ram=1
+      ³  ³  ÃÄ@delay_ms1  0/21  Ram=1
+      ³  ³  ÀÄlcd_send_nibble  0/23  Ram=1
+      ³  ³     ÀÄ@delay_ms1  0/21  Ram=1
+      ³  ÃÄ@const135  0/8  Ram=0
+      ³  ÃÄlcd_send_byte  0/37  Ram=3
+      ³  ³  ÃÄlcd_send_nibble  0/23  Ram=1
+      ³  ³  ³  ÀÄ@delay_ms1  0/21  Ram=1
+      ³  ³  ÃÄ@delay_ms1  0/21  Ram=1
+      ³  ³  ÀÄlcd_send_nibble  0/23  Ram=1
+      ³  ³     ÀÄ@delay_ms1  0/21  Ram=1
+      ³  ÃÄ@const131  0/8  Ram=0
+      ³  ÀÄlcd_send_byte  0/37  Ram=3
+      ³     ÃÄlcd_send_nibble  0/23  Ram=1
+      ³     ³  ÀÄ@delay_ms1  0/21  Ram=1
+      ³     ÃÄ@delay_ms1  0/21  Ram=1
+      ³     ÀÄlcd_send_nibble  0/23  Ram=1
+      ³        ÀÄ@delay_ms1  0/21  Ram=1
+      ÃÄlcd_putc  0/36  Ram=1
+      ³  ÃÄlcd_send_byte  0/37  Ram=3
+      ³  ³  ÃÄlcd_send_nibble  0/23  Ram=1
+      ³  ³  ³  ÀÄ@delay_ms1  0/21  Ram=1
+      ³  ³  ÃÄ@delay_ms1  0/21  Ram=1
+      ³  ³  ÀÄlcd_send_nibble  0/23  Ram=1
+      ³  ³     ÀÄ@delay_ms1  0/21  Ram=1
+      ³  ÃÄ@delay_ms1  0/21  Ram=1
+      ³  ÃÄlcd_send_byte  0/37  Ram=3
+      ³  ³  ÃÄlcd_send_nibble  0/23  Ram=1
+      ³  ³  ³  ÀÄ@delay_ms1  0/21  Ram=1
+      ³  ³  ÃÄ@delay_ms1  0/21  Ram=1
+      ³  ³  ÀÄlcd_send_nibble  0/23  Ram=1
+      ³  ³     ÀÄ@delay_ms1  0/21  Ram=1
+      ³  ÃÄlcd_send_byte  0/37  Ram=3
+      ³  ³  ÃÄlcd_send_nibble  0/23  Ram=1
+      ³  ³  ³  ÀÄ@delay_ms1  0/21  Ram=1
+      ³  ³  ÃÄ@delay_ms1  0/21  Ram=1
+      ³  ³  ÀÄlcd_send_nibble  0/23  Ram=1
+      ³  ³     ÀÄ@delay_ms1  0/21  Ram=1
+      ³  ÀÄlcd_send_byte  0/37  Ram=3
+      ³     ÃÄlcd_send_nibble  0/23  Ram=1
+      ³     ³  ÀÄ@delay_ms1  0/21  Ram=1
+      ³     ÃÄ@delay_ms1  0/21  Ram=1
+      ³     ÀÄlcd_send_nibble  0/23  Ram=1
+      ³        ÀÄ@delay_ms1  0/21  Ram=1
+      ÃÄsend_string  0/20  Ram=4
+      ³  ÃÄlcd_putc  0/36  Ram=1
+      ³  ³  ÃÄlcd_send_byte  0/37  Ram=3
+      ³  ³  ³  ÃÄlcd_send_nibble  0/23  Ram=1
+      ³  ³  ³  ³  ÀÄ@delay_ms1  0/21  Ram=1
+      ³  ³  ³  ÃÄ@delay_ms1  0/21  Ram=1
+      ³  ³  ³  ÀÄlcd_send_nibble  0/23  Ram=1
+      ³  ³  ³     ÀÄ@delay_ms1  0/21  Ram=1
+      ³  ³  ÃÄ@delay_ms1  0/21  Ram=1
+      ³  ³  ÃÄlcd_send_byte  0/37  Ram=3
+      ³  ³  ³  ÃÄlcd_send_nibble  0/23  Ram=1
+      ³  ³  ³  ³  ÀÄ@delay_ms1  0/21  Ram=1
+      ³  ³  ³  ÃÄ@delay_ms1  0/21  Ram=1
+      ³  ³  ³  ÀÄlcd_send_nibble  0/23  Ram=1
+      ³  ³  ³     ÀÄ@delay_ms1  0/21  Ram=1
+      ³  ³  ÃÄlcd_send_byte  0/37  Ram=3
+      ³  ³  ³  ÃÄlcd_send_nibble  0/23  Ram=1
+      ³  ³  ³  ³  ÀÄ@delay_ms1  0/21  Ram=1
+      ³  ³  ³  ÃÄ@delay_ms1  0/21  Ram=1
+      ³  ³  ³  ÀÄlcd_send_nibble  0/23  Ram=1
+      ³  ³  ³     ÀÄ@delay_ms1  0/21  Ram=1
+      ³  ³  ÀÄlcd_send_byte  0/37  Ram=3
+      ³  ³     ÃÄlcd_send_nibble  0/23  Ram=1
+      ³  ³     ³  ÀÄ@delay_ms1  0/21  Ram=1
+      ³  ³     ÃÄ@delay_ms1  0/21  Ram=1
+      ³  ³     ÀÄlcd_send_nibble  0/23  Ram=1
+      ³  ³        ÀÄ@delay_ms1  0/21  Ram=1
+      ³  ÀÄ@delay_ms1  0/21  Ram=1
+      ÃÄlcd_putc  0/36  Ram=1
+      ³  ÃÄlcd_send_byte  0/37  Ram=3
+      ³  ³  ÃÄlcd_send_nibble  0/23  Ram=1
+      ³  ³  ³  ÀÄ@delay_ms1  0/21  Ram=1
+      ³  ³  ÃÄ@delay_ms1  0/21  Ram=1
+      ³  ³  ÀÄlcd_send_nibble  0/23  Ram=1
+      ³  ³     ÀÄ@delay_ms1  0/21  Ram=1
+      ³  ÃÄ@delay_ms1  0/21  Ram=1
+      ³  ÃÄlcd_send_byte  0/37  Ram=3
+      ³  ³  ÃÄlcd_send_nibble  0/23  Ram=1
+      ³  ³  ³  ÀÄ@delay_ms1  0/21  Ram=1
+      ³  ³  ÃÄ@delay_ms1  0/21  Ram=1
+      ³  ³  ÀÄlcd_send_nibble  0/23  Ram=1
+      ³  ³     ÀÄ@delay_ms1  0/21  Ram=1
+      ³  ÃÄlcd_send_byte  0/37  Ram=3
+      ³  ³  ÃÄlcd_send_nibble  0/23  Ram=1
+      ³  ³  ³  ÀÄ@delay_ms1  0/21  Ram=1
+      ³  ³  ÃÄ@delay_ms1  0/21  Ram=1
+      ³  ³  ÀÄlcd_send_nibble  0/23  Ram=1
+      ³  ³     ÀÄ@delay_ms1  0/21  Ram=1
+      ³  ÀÄlcd_send_byte  0/37  Ram=3
+      ³     ÃÄlcd_send_nibble  0/23  Ram=1
+      ³     ³  ÀÄ@delay_ms1  0/21  Ram=1
+      ³     ÃÄ@delay_ms1  0/21  Ram=1
+      ³     ÀÄlcd_send_nibble  0/23  Ram=1
+      ³        ÀÄ@delay_ms1  0/21  Ram=1
+      ÃÄsend_string  0/20  Ram=4
+      ³  ÃÄlcd_putc  0/36  Ram=1
+      ³  ³  ÃÄlcd_send_byte  0/37  Ram=3
+      ³  ³  ³  ÃÄlcd_send_nibble  0/23  Ram=1
+      ³  ³  ³  ³  ÀÄ@delay_ms1  0/21  Ram=1
+      ³  ³  ³  ÃÄ@delay_ms1  0/21  Ram=1
+      ³  ³  ³  ÀÄlcd_send_nibble  0/23  Ram=1
+      ³  ³  ³     ÀÄ@delay_ms1  0/21  Ram=1
+      ³  ³  ÃÄ@delay_ms1  0/21  Ram=1
+      ³  ³  ÃÄlcd_send_byte  0/37  Ram=3
+      ³  ³  ³  ÃÄlcd_send_nibble  0/23  Ram=1
+      ³  ³  ³  ³  ÀÄ@delay_ms1  0/21  Ram=1
+      ³  ³  ³  ÃÄ@delay_ms1  0/21  Ram=1
+      ³  ³  ³  ÀÄlcd_send_nibble  0/23  Ram=1
+      ³  ³  ³     ÀÄ@delay_ms1  0/21  Ram=1
+      ³  ³  ÃÄlcd_send_byte  0/37  Ram=3
+      ³  ³  ³  ÃÄlcd_send_nibble  0/23  Ram=1
+      ³  ³  ³  ³  ÀÄ@delay_ms1  0/21  Ram=1
+      ³  ³  ³  ÃÄ@delay_ms1  0/21  Ram=1
+      ³  ³  ³  ÀÄlcd_send_nibble  0/23  Ram=1
+      ³  ³  ³     ÀÄ@delay_ms1  0/21  Ram=1
+      ³  ³  ÀÄlcd_send_byte  0/37  Ram=3
+      ³  ³     ÃÄlcd_send_nibble  0/23  Ram=1
+      ³  ³     ³  ÀÄ@delay_ms1  0/21  Ram=1
+      ³  ³     ÃÄ@delay_ms1  0/21  Ram=1
+      ³  ³     ÀÄlcd_send_nibble  0/23  Ram=1
+      ³  ³        ÀÄ@delay_ms1  0/21  Ram=1
+      ³  ÀÄ@delay_ms1  0/21  Ram=1
+      ÃÄlcd_putc  0/36  Ram=1
+      ³  ÃÄlcd_send_byte  0/37  Ram=3
+      ³  ³  ÃÄlcd_send_nibble  0/23  Ram=1
+      ³  ³  ³  ÀÄ@delay_ms1  0/21  Ram=1
+      ³  ³  ÃÄ@delay_ms1  0/21  Ram=1
+      ³  ³  ÀÄlcd_send_nibble  0/23  Ram=1
+      ³  ³     ÀÄ@delay_ms1  0/21  Ram=1
+      ³  ÃÄ@delay_ms1  0/21  Ram=1
+      ³  ÃÄlcd_send_byte  0/37  Ram=3
+      ³  ³  ÃÄlcd_send_nibble  0/23  Ram=1
+      ³  ³  ³  ÀÄ@delay_ms1  0/21  Ram=1
+      ³  ³  ÃÄ@delay_ms1  0/21  Ram=1
+      ³  ³  ÀÄlcd_send_nibble  0/23  Ram=1
+      ³  ³     ÀÄ@delay_ms1  0/21  Ram=1
+      ³  ÃÄlcd_send_byte  0/37  Ram=3
+      ³  ³  ÃÄlcd_send_nibble  0/23  Ram=1
+      ³  ³  ³  ÀÄ@delay_ms1  0/21  Ram=1
+      ³  ³  ÃÄ@delay_ms1  0/21  Ram=1
+      ³  ³  ÀÄlcd_send_nibble  0/23  Ram=1
+      ³  ³     ÀÄ@delay_ms1  0/21  Ram=1
+      ³  ÀÄlcd_send_byte  0/37  Ram=3
+      ³     ÃÄlcd_send_nibble  0/23  Ram=1
+      ³     ³  ÀÄ@delay_ms1  0/21  Ram=1
+      ³     ÃÄ@delay_ms1  0/21  Ram=1
+      ³     ÀÄlcd_send_nibble  0/23  Ram=1
+      ³        ÀÄ@delay_ms1  0/21  Ram=1
+      ÃÄlcd_putc  0/36  Ram=1
+      ³  ÃÄlcd_send_byte  0/37  Ram=3
+      ³  ³  ÃÄlcd_send_nibble  0/23  Ram=1
+      ³  ³  ³  ÀÄ@delay_ms1  0/21  Ram=1
+      ³  ³  ÃÄ@delay_ms1  0/21  Ram=1
+      ³  ³  ÀÄlcd_send_nibble  0/23  Ram=1
+      ³  ³     ÀÄ@delay_ms1  0/21  Ram=1
+      ³  ÃÄ@delay_ms1  0/21  Ram=1
+      ³  ÃÄlcd_send_byte  0/37  Ram=3
+      ³  ³  ÃÄlcd_send_nibble  0/23  Ram=1
+      ³  ³  ³  ÀÄ@delay_ms1  0/21  Ram=1
+      ³  ³  ÃÄ@delay_ms1  0/21  Ram=1
+      ³  ³  ÀÄlcd_send_nibble  0/23  Ram=1
+      ³  ³     ÀÄ@delay_ms1  0/21  Ram=1
+      ³  ÃÄlcd_send_byte  0/37  Ram=3
+      ³  ³  ÃÄlcd_send_nibble  0/23  Ram=1
+      ³  ³  ³  ÀÄ@delay_ms1  0/21  Ram=1
+      ³  ³  ÃÄ@delay_ms1  0/21  Ram=1
+      ³  ³  ÀÄlcd_send_nibble  0/23  Ram=1
+      ³  ³     ÀÄ@delay_ms1  0/21  Ram=1
+      ³  ÀÄlcd_send_byte  0/37  Ram=3
+      ³     ÃÄlcd_send_nibble  0/23  Ram=1
+      ³     ³  ÀÄ@delay_ms1  0/21  Ram=1
+      ³     ÃÄ@delay_ms1  0/21  Ram=1
+      ³     ÀÄlcd_send_nibble  0/23  Ram=1
+      ³        ÀÄ@delay_ms1  0/21  Ram=1
+      ÃÄsend_string  0/20  Ram=4
+      ³  ÃÄlcd_putc  0/36  Ram=1
+      ³  ³  ÃÄlcd_send_byte  0/37  Ram=3
+      ³  ³  ³  ÃÄlcd_send_nibble  0/23  Ram=1
+      ³  ³  ³  ³  ÀÄ@delay_ms1  0/21  Ram=1
+      ³  ³  ³  ÃÄ@delay_ms1  0/21  Ram=1
+      ³  ³  ³  ÀÄlcd_send_nibble  0/23  Ram=1
+      ³  ³  ³     ÀÄ@delay_ms1  0/21  Ram=1
+      ³  ³  ÃÄ@delay_ms1  0/21  Ram=1
+      ³  ³  ÃÄlcd_send_byte  0/37  Ram=3
+      ³  ³  ³  ÃÄlcd_send_nibble  0/23  Ram=1
+      ³  ³  ³  ³  ÀÄ@delay_ms1  0/21  Ram=1
+      ³  ³  ³  ÃÄ@delay_ms1  0/21  Ram=1
+      ³  ³  ³  ÀÄlcd_send_nibble  0/23  Ram=1
+      ³  ³  ³     ÀÄ@delay_ms1  0/21  Ram=1
+      ³  ³  ÃÄlcd_send_byte  0/37  Ram=3
+      ³  ³  ³  ÃÄlcd_send_nibble  0/23  Ram=1
+      ³  ³  ³  ³  ÀÄ@delay_ms1  0/21  Ram=1
+      ³  ³  ³  ÃÄ@delay_ms1  0/21  Ram=1
+      ³  ³  ³  ÀÄlcd_send_nibble  0/23  Ram=1
+      ³  ³  ³     ÀÄ@delay_ms1  0/21  Ram=1
+      ³  ³  ÀÄlcd_send_byte  0/37  Ram=3
+      ³  ³     ÃÄlcd_send_nibble  0/23  Ram=1
+      ³  ³     ³  ÀÄ@delay_ms1  0/21  Ram=1
+      ³  ³     ÃÄ@delay_ms1  0/21  Ram=1
+      ³  ³     ÀÄlcd_send_nibble  0/23  Ram=1
+      ³  ³        ÀÄ@delay_ms1  0/21  Ram=1
+      ³  ÀÄ@delay_ms1  0/21  Ram=1
+      ÃÄ@delay_ms1  0/21  Ram=1
+      ÃÄlcd_init  0/101  Ram=3
+      ³  ÃÄ@delay_ms1  0/21  Ram=1
+      ³  ÃÄlcd_send_nibble  0/23  Ram=1
+      ³  ³  ÀÄ@delay_ms1  0/21  Ram=1
+      ³  ÃÄ@delay_ms1  0/21  Ram=1
+      ³  ÃÄlcd_send_nibble  0/23  Ram=1
+      ³  ³  ÀÄ@delay_ms1  0/21  Ram=1
+      ³  ÃÄ@delay_ms1  0/21  Ram=1
+      ³  ÃÄ@const131  0/8  Ram=0
+      ³  ÃÄlcd_send_byte  0/37  Ram=3
+      ³  ³  ÃÄlcd_send_nibble  0/23  Ram=1
+      ³  ³  ³  ÀÄ@delay_ms1  0/21  Ram=1
+      ³  ³  ÃÄ@delay_ms1  0/21  Ram=1
+      ³  ³  ÀÄlcd_send_nibble  0/23  Ram=1
+      ³  ³     ÀÄ@delay_ms1  0/21  Ram=1
+      ³  ÃÄ@const133  0/8  Ram=0
+      ³  ÃÄlcd_send_byte  0/37  Ram=3
+      ³  ³  ÃÄlcd_send_nibble  0/23  Ram=1
+      ³  ³  ³  ÀÄ@delay_ms1  0/21  Ram=1
+      ³  ³  ÃÄ@delay_ms1  0/21  Ram=1
+      ³  ³  ÀÄlcd_send_nibble  0/23  Ram=1
+      ³  ³     ÀÄ@delay_ms1  0/21  Ram=1
+      ³  ÃÄ@const135  0/8  Ram=0
+      ³  ÃÄlcd_send_byte  0/37  Ram=3
+      ³  ³  ÃÄlcd_send_nibble  0/23  Ram=1
+      ³  ³  ³  ÀÄ@delay_ms1  0/21  Ram=1
+      ³  ³  ÃÄ@delay_ms1  0/21  Ram=1
+      ³  ³  ÀÄlcd_send_nibble  0/23  Ram=1
+      ³  ³     ÀÄ@delay_ms1  0/21  Ram=1
+      ³  ÃÄ@const131  0/8  Ram=0
+      ³  ÀÄlcd_send_byte  0/37  Ram=3
+      ³     ÃÄlcd_send_nibble  0/23  Ram=1
+      ³     ³  ÀÄ@delay_ms1  0/21  Ram=1
+      ³     ÃÄ@delay_ms1  0/21  Ram=1
+      ³     ÀÄlcd_send_nibble  0/23  Ram=1
+      ³        ÀÄ@delay_ms1  0/21  Ram=1
+      ÀÄsend_string  0/20  Ram=4
+         ÃÄlcd_putc  0/36  Ram=1
+         ³  ÃÄlcd_send_byte  0/37  Ram=3
+         ³  ³  ÃÄlcd_send_nibble  0/23  Ram=1
+         ³  ³  ³  ÀÄ@delay_ms1  0/21  Ram=1
+         ³  ³  ÃÄ@delay_ms1  0/21  Ram=1
+         ³  ³  ÀÄlcd_send_nibble  0/23  Ram=1
+         ³  ³     ÀÄ@delay_ms1  0/21  Ram=1
+         ³  ÃÄ@delay_ms1  0/21  Ram=1
+         ³  ÃÄlcd_send_byte  0/37  Ram=3
+         ³  ³  ÃÄlcd_send_nibble  0/23  Ram=1
+         ³  ³  ³  ÀÄ@delay_ms1  0/21  Ram=1
+         ³  ³  ÃÄ@delay_ms1  0/21  Ram=1
+         ³  ³  ÀÄlcd_send_nibble  0/23  Ram=1
+         ³  ³     ÀÄ@delay_ms1  0/21  Ram=1
+         ³  ÃÄlcd_send_byte  0/37  Ram=3
+         ³  ³  ÃÄlcd_send_nibble  0/23  Ram=1
+         ³  ³  ³  ÀÄ@delay_ms1  0/21  Ram=1
+         ³  ³  ÃÄ@delay_ms1  0/21  Ram=1
+         ³  ³  ÀÄlcd_send_nibble  0/23  Ram=1
+         ³  ³     ÀÄ@delay_ms1  0/21  Ram=1
+         ³  ÀÄlcd_send_byte  0/37  Ram=3
+         ³     ÃÄlcd_send_nibble  0/23  Ram=1
+         ³     ³  ÀÄ@delay_ms1  0/21  Ram=1
+         ³     ÃÄ@delay_ms1  0/21  Ram=1
+         ³     ÀÄlcd_send_nibble  0/23  Ram=1
+         ³        ÀÄ@delay_ms1  0/21  Ram=1
+         ÀÄ@delay_ms1  0/21  Ram=1
--- a/ee2a/lab4/4bit/lcd_display_4bit.PJT
+++ b/ee2a/lab4/4bit/lcd_display_4bit.PJT
@ -0,0 +1,38 @@
+[PROJECT]
+Target=lcd_display_4bit.HEX
+Development_Mode=2
+Processor=0x648A
+ToolSuite=CCS
+
+[Directories]
+Include=
+Library=
+LinkerScript=
+
+[Target Data]
+FileList=Y:\Year 2\EE2A\PIC-LCD\4bit\lcd_display_4bit.c
+BuildTool=C-COMPILER
+OptionString=+FM
+AdditionalOptionString=
+BuildRequired=1
+
+[lcd_display_4bit.c]
+Type=4
+Path=
+FileList=
+BuildTool=
+OptionString=
+AdditionalOptionString=
+
+[mru-list]
+1=Y:\YEAR2~1\EE2A\PIC-LCD\4bit\LCD_DI~1.C
+
+[Windows]
+0=0000 Y:\YEAR2~1\EE2A\PIC-LCD\4bit\LCD_DI~1.C 0 0 796 451 3 0
+
+[Opened Files]
+1=Y:\Year 2\EE2A\PIC-LCD\4bit\lcd_display_4bit.c
+2=
+[Units]
+Count=1
+1=Y:\Year 2\EE2A\PIC-LCD\4bit\lcd_display_4bit.c (main)
--- a/ee2a/lab4/4bit/lcd_display_4bit.c
+++ b/ee2a/lab4/4bit/lcd_display_4bit.c
@ -0,0 +1,81 @@
+/*
+ * Authors: Sam Black, Sam Burras, Ben Francis
+ *
+ * Version 1.0  Date: 07/02/07
+ *
+ * Program to send strings to the LCD using
+ * a 4-bit driver
+ *
+ */
+
+#include <16F648A.h>
+#include <string.h>
+#use delay(clock=4000000)
+#fuses NOWDT, INTRC_IO, NOPUT, NOPROTECT, NOLVP, NOMCLR
+#include "LCD_4BIT.H"
+
+char INITMESSAGE[16] = "How can I help?";
+char MESSAGE1[16] = "The answer?";
+char MESSAGE2[16] = "Forty Two.";
+char MESSAGE3[16] = "  ?noitseuQ ehT";
+
+void send_string(int delay, char string[])
+{
+   int i;
+
+/* send the string */
+   for(i=0; string[i] != '\0'; i++)
+   {
+      lcd_putc(string[i]);
+      delay_ms(delay);
+   }
+}
+
+void send_string_reverse(int delay, char string[])
+{
+   int i;
+
+/* send the string */
+   for(i=14; i>=0; i--)
+   {
+      lcd_putc(string[i]);
+      delay_ms(delay);
+   }
+}
+
+int main(void)
+{
+/* Init the Display */
+   lcd_init(2);
+/* Clear the screen */
+   lcd_putc('\f');
+/* Send the message */
+   send_string(5, INITMESSAGE);
+
+/* Display on the first line after button press */
+   while(lcd.button == 1)
+   { }
+   lcd_putc('\f');
+   send_string(1000, MESSAGE1);
+
+   while(lcd.button == 1)
+   { }
+   lcd_putc('\f');
+   /* New line */
+   lcd_putc('\n');
+   send_string(5, MESSAGE2);
+   /* Add delay for button debouncing */
+   delay_ms(500);
+
+   /*wait for button press*/
+   while(lcd.button == 1)
+   { }
+   /* Re-initialise the display to scroll */
+   lcd_init(3);
+
+   while(1) {
+     send_string(200, MESSAGE3);
+   }
+
+   return 0;
+}
--- a/ee2a/lab4/4bit/lcd_display_4bit.cof
+++ b/ee2a/lab4/4bit/lcd_display_4bit.cof
--- a/ee2a/lab4/4bit/lcd_display_4bit.err
+++ b/ee2a/lab4/4bit/lcd_display_4bit.err
@ -0,0 +1,2 @@
+No Errors
+      0 Errors,  0 Warnings.
--- a/ee2a/lab4/4bit/lcd_display_4bit.hex
+++ b/ee2a/lab4/4bit/lcd_display_4bit.hex
@ -0,0 +1,59 @@
+:1000000000308A000A2900000A108A100A118207AB
+:1000100028340C34013406340A108A100A1182077D
+:1000200028340E34013406340A108A100A1182076B
+:1000300020340C34013405346A308400000803197C
+:1000400030280130F800F701F70B2428F80B23289B
+:100050004A30F700F70B2A2800000000800B212807
+:10006000003406151030F700F70B34280000690E35
+:10007000F039F7000F300605770486000130EA00FA
+:100080001C2006111030F700F70B44280000003444
+:100090000830831686008312661C06106618061444
+:1000A0008610A630F700F70B53280000670EE80013
+:1000B0000F30E8056808E90031200130EA001C2013
+:1000C00067080F39E800E900312086140610A630D1
+:1000D000F700F70B6928000000340830831686000B
+:1000E00083120610861006110F30EA001C20E20170
+:1000F0006208033C031C84280330E90031200530EA
+:10010000EA001C20E20A78280230E900312005309C
+:10011000EA001C206108013A03199528033A0319E3
+:10012000A428013A0319B328C228E2016208033C5B
+:10013000031CA32862080420E300E6016308E7002B
+:100140004820E20A9628D128E2016208033C031CF9
+:10015000B22862080C20E300E6016308E7004820AB
+:10016000E20AA528D128E2016208033C031CC12849
+:1001700062081420E300E6016308E7004820E20A71
+:10018000B428D128E2016208033C031CD02862088D
+:100190000420E300E6016308E7004820E20AC328E0
+:1001A000D128003465080C3A0319DD28043A0319F4
+:1001B000E528023A0319EA28EF28E6010130E700B2
+:1001C00048200230EA001C20F528E6010830E7004C
+:1001D0004820F528E601C030E7004820F528013026
+:1001E000E6006508E7004820F5280034E3016208CE