Updated data for ES

ES/Lab/LAB5/Questions.md

@@ -1,3 +0,0 @@
-1. Sort using insertion sort
-2. [Factorial using recursion](https://git.aadit.cc/aadit/MIT-Curricular/src/branch/main/ES/Lab/LAB5/FACTORIAL.asm)
-3. Search for an element and store the address

ES/Lab/LAB6/JOHNSON_Counter.c

@@ -28,4 +28,4 @@ int main(){
 		for(j=0; j<800000; j++);
 
 	}
-	}
+}

ES/Lab/Lab7/JOHNSON_Up_Down_Separate_GPIO.c

@@ -0,0 +1,30 @@
+#include <LPC17xx.h>
+
+int main(){
+	unsigned long x, y, i, j;
+
+	LPC_PINCON->PINSEL0 = 0;
+	LPC_GPIO0->FIODIR = 0xFF<<15;
+	LPC_GPIO2->FIODIR = 0x0<<12;
+
+	while(1){
+		x = LPC_GPIO2->FIOPIN & (1 << 12);
+		y = x ? (1<<22) : (1<<15);
+		int dir = x ? 1 : 0;
+
+		for(int k=0; k<2; k++){
+			for(i=0; i<8; i++){
+				LPC_GPIO0->FIOSET = y;
+				y = dir ? y>>1 : y<<1;
+				for(j=0; j<800000; j++);
+			}
+			y = x ? (1<<22) : (1<<15);
+			LPC_GPIO0->FIOCLR = y;
+		}
+		for(i=0; i<8; i++){
+			LPC_GPIO0->FIOCLR = y;
+			y = dir ? y>>1 : y<<1;
+			for(j=0; j<800000; j++);
+		}
+	}
+}

ES/Lab/Lab8/16keyOn7Seg.c

@@ -0,0 +1,89 @@
+#include <LPC17xx.h>
+
+int main(void) {
+    unsigned long i, c, r;
+    unsigned long candidate = 0xFF;
+    unsigned long stable = 0;
+    unsigned long displayed = 0xFF;
+    unsigned long read_key, rows, seg;
+    unsigned char seven_seg[16] = {
+        0x3F, 0x06, 0x5B, 0x4F,
+        0x66, 0x6D, 0x7D, 0x07,
+        0x7F, 0x6F, 0x77, 0x7C,
+        0x39, 0x5E, 0x79, 0x71
+    };
+
+    // Configure pins as GPIO for used ranges
+    LPC_PINCON->PINSEL0 = 0;
+    LPC_PINCON->PINSEL1 = 0;
+    LPC_PINCON->PINSEL3 = 0;
+
+    // Directions
+    LPC_GPIO0->FIODIR |= (0xFFu << 4);    // P0.4..P0.11 -> segments out
+    LPC_GPIO0->FIODIR |= (0x0Fu << 15);   // P0.15..P0.18 -> columns out
+    LPC_GPIO0->FIODIR &= ~(0x0Fu << 19);  // P0.19..P0.22 -> rows in
+    LPC_GPIO1->FIODIR |= (0x0Fu << 23);   // P1.23..P1.26 -> digit enables out
+
+    // Initial states
+    LPC_GPIO0->FIOCLR = (0xFFu << 4);     // segments off
+    LPC_GPIO1->FIOCLR = (0x0Fu << 23);    // all digits off
+    LPC_GPIO0->FIOSET = (0x0Fu << 15);    // all columns high (inactive)
+
+    while (1) {
+        read_key = 0xFF;
+
+        // Scan 4 columns
+        for (c = 0; c < 4; c++) {
+            // Set all columns high, then pull one low
+            LPC_GPIO0->FIOSET = (0x0Fu << 15);
+            for (i = 0; i < 50; i++);     // short settle delay
+            LPC_GPIO0->FIOCLR = (1u << (15 + c));
+            for (i = 0; i < 200; i++);    // settle after driving column
+
+            // Read rows P0.19..P0.22 (active-low). Normalize to 0..15.
+            rows = (LPC_GPIO0->FIOPIN >> 19) & 0x0Fu;
+
+            if (rows != 0x0Fu) {
+                for (r = 0; r < 4; r++) {
+                    if (((rows >> r) & 1u) == 0u) {
+                        read_key = (c << 2) + r; // c*4 + r, 0..15
+                        break;
+                    }
+                }
+                LPC_GPIO0->FIOSET = (0x0Fu << 15); // restore columns high
+                break; // found a key this scan
+            }
+        }
+
+        // Debounce: require 3 consecutive identical reads
+        if (read_key == candidate) {
+            if (stable < 3) stable++;
+        } else {
+            candidate = read_key;
+            stable = 1;
+        }
+
+        if (stable >= 3) {
+            if (candidate != 0xFF) {
+                displayed = candidate & 0x0F;
+            }
+            stable = 3; // clamp
+        }
+
+        // Update display if we have a digit
+        if (displayed != 0xFF) {
+            seg = seven_seg[displayed];
+            LPC_GPIO0->FIOCLR = (0xFFu << 4);
+            LPC_GPIO0->FIOSET = ((unsigned long)seg << 4);
+
+            // Enable only digit at P1.23
+            LPC_GPIO1->FIOCLR = (0x0Fu << 23);
+            LPC_GPIO1->FIOSET = (1u << 23);
+        } else {
+            LPC_GPIO1->FIOCLR = (0x0Fu << 23);
+        }
+
+        // Pace scanning/debounce timing
+        for (i = 0; i < 3000; i++);
+    }
+}

ES/Lab/Lab8/7SegUpDown-Switch.c

@@ -43,5 +43,4 @@ int main(void){
             }
         }
     }
-
 }

ES/Lab/Lab8/JOHNSON_Up_Down_Separate_GPIO.c

@@ -1,45 +0,0 @@
-#include <LPC17xx.h>
-
-int main(){
-	unsigned long x, y, i, j;
-	
-	// LEDs
-	LPC_PINCON->PINSEL0 = 0; 
-	LPC_GPIO0->FIODIR = 0xFF<<15; 
-	
-	LPC_GPIO2->FIODIR = 0x0<<12;
-	
-	while(1){
-		x = LPC_GPIO2->FIOPIN & (1 << 12); 
-		if(x){
-					y = 1<<22;
-					for(i=0;i<8;i++){
-					LPC_GPIO0->FIOSET=y; 
-					y = y>>1;
-					for(j=0; j<800000; j++);
-				}
-				y = 1<<22;
-				for(i=0;i<8;i++){
-					LPC_GPIO0->FIOCLR=y;
-					y>>=1;
-					for(j=0; j<800000; j++);
-				}
-		}
-		
-		if(!x){
-				y = 1<<15;
-				for(i=0;i<8;i++){
-					LPC_GPIO0->FIOSET=y; 
-					y = y<<1;
-					for(j=0; j<800000; j++);
-				}
-				y = 1<<15;
-				for(i=0;i<8;i++){
-					LPC_GPIO0->FIOCLR=y;
-					y = y<<1;
-					for(j=0; j<800000; j++);
-				}
-		}
-	}
-}
-

ES/Lab/Lab9/LCD_DOUBLELINE.c

@@ -4,9 +4,12 @@
 #define EN_CTRL 0x10000000
 #define DT_CTRL 0x07800000
 
+#define LCD_COLS 16
+
 unsigned int col = 0;
 unsigned long int temp1 = 0, temp2 = 0, i, j;
 unsigned char flag1 = 0, flag2 = 0;
+
 unsigned char msg[] = ("Long messages work well, heh.");
 
 void lcd_write(void);
@@ -17,23 +20,18 @@ unsigned long int init_command[] = {
     0x30, 0x30, 0x30, 0x20, 0x28, 0x0C, 0x01, 0x80
 };
 
-#define LCD_COLS 16
-
 int main() {
     LPC_GPIO0->FIODIR = DT_CTRL | RS_CTRL | EN_CTRL;
 
     flag1 = 0;
 
-    
     for (i = 0; i < 8; i++) {
         temp1 = init_command[i];
         lcd_write();
     }
 
-    
     flag1 = 1;
 
-    
     i = 0;
 
     while (msg[i] != '\0') {
@@ -41,13 +39,11 @@ int main() {
             flag1 = 0;
             temp1 = 0xC0;
             lcd_write();
-
             flag1 = 1;
         } else if (col == (LCD_COLS * 2)) {
             flag1 = 0;
             temp1 = 0x80;
             lcd_write();
-
             flag1 = 1;
             col = 0;
         }
@@ -57,8 +53,7 @@ int main() {
         col++;
     }
 
-    while (1)
-        ;
+    while (1);
 }
 
 void lcd_write(void) {
@@ -95,8 +90,6 @@ void port_write(void) {
 
 void delay_lcd(unsigned long r1) {
     unsigned long r;
-
-    for (r = 0; r < r1; r++)
-        ;
+    for (r = 0; r < r1; r++);
     return;
 }

ES/Lab/Lab9/LCD_UPPERLINE.c

@@ -6,7 +6,7 @@
 
 unsigned long int temp1 = 0, temp2 = 0, i, j;
 unsigned char flag1 = 0, flag2 = 0;
-unsigned char msg[] = ("Santhosh Sir Gr8");
+unsigned char msg[] = ("We have fun.");
 
 void lcd_write(void);
 void port_write(void);

ES/Lab/Lab9/dice.c

@@ -0,0 +1,45 @@
+#include <LPC17xx.h>
+#include <stdlib.h>
+
+#define RS_CTRL 0x08000000
+#define EN_CTRL 0x10000000
+#define DT_CTRL 0x07800000
+
+unsigned long int temp1 = 0, temp2 = 0, i, j;
+unsigned char flag1 = 0, flag2 = 0;
+unsigned char msg[] = ("Dice: ");
+
+void lcd_write(void);
+void port_write(void);
+void delay_lcd(unsigned long);
+
+unsigned long int init_command[] = {0x30,0x30,0x30,0x20,0x28,0x0C,0x01,0x80};
+
+int main() {
+    LPC_GPIO0->FIODIR = DT_CTRL | RS_CTRL | EN_CTRL;
+    for (i = 0; i < 8; i++) { temp1 = init_command[i]; flag1 = 0; lcd_write(); }
+    LPC_PINCON->PINSEL3 = 0; LPC_GPIO0->FIODIR &= ~(1 << 21);
+
+    while (1) {
+        while ((LPC_GPIO0->FIOPIN & (1 << 21)) != 0);
+        flag1 = 0; temp1 = 0x01; lcd_write(); temp1 = 0x80; lcd_write();
+        flag1 = 1; for (i = 0; msg[i] != '\0'; i++) { temp1 = msg[i]; lcd_write(); }
+        j = (rand() % 6) + 1; temp1 = '0' + j; lcd_write();
+        while ((LPC_GPIO0->FIOPIN & (1 << 21)) == 0);
+    }
+}
+
+void lcd_write(void) {
+    flag2 = (flag1 == 1) ? 0 : (((temp1 == 0x30) || (temp1 == 0x20)) ? 1 : 0);
+    temp2 = (temp1 & 0xF0) << 19; port_write();
+    if (!flag2) { temp2 = (temp1 & 0x0F) << 23; port_write(); }
+}
+
+void port_write(void) {
+    LPC_GPIO0->FIOPIN = temp2;
+    if (flag1 == 0) LPC_GPIO0->FIOCLR = RS_CTRL; else LPC_GPIO0->FIOSET = RS_CTRL;
+    LPC_GPIO0->FIOSET = EN_CTRL; delay_lcd(100); LPC_GPIO0->FIOCLR = EN_CTRL;
+    delay_lcd(500000);
+}
+
+void delay_lcd(unsigned long r1) { unsigned long r; for (r = 0; r < r1; r++); }