Updated data for ES

ES/Lab/Lab10/ADC_Display.c

@@ -5,26 +5,30 @@
 #define EN_CTRL 0x10000000
 #define DT_CTRL 0x07800000
 
-unsigned long result, y; // ADC Result
+unsigned long result, y;
 unsigned long int temp1 = 0, temp2 = 0, i;
 unsigned char flag1 = 0, flag2 = 0;
-unsigned char msg[20]; // To store the ADC value string
+unsigned char msg[20];
 
 void lcd_write(void);
 void port_write(void);
 void delay_lcd(unsigned long);
 void lcd_init(void);
 void lcd_print(unsigned char *);
+void lcd_clear(void);
 void ADC_IRQHandler(void);
 void ADC_init(void);
 
 int main(void) {
     LPC_GPIO0->FIODIR = DT_CTRL | RS_CTRL | EN_CTRL; // LCD pins as output
-    lcd_init(); // initialize LCD
-    ADC_init(); // initialize ADC
+
+    lcd_init();  // Initialize LCD
+    lcd_print((unsigned char *)"ADC Val:"); // Idle message
+
+    ADC_init();  // Initialize ADC
 
     while (1) {
-        // main loop does nothing, display will update via interrupt
+        // idle loop
     }
 }
 
@@ -37,16 +41,14 @@ void ADC_init(void) {
 }
 
 void ADC_IRQHandler(void) {
-    result = (LPC_ADC->ADGDR >> 4) & 0xFFF; // Get 12-bit ADC result
+    result = (LPC_ADC->ADGDR >> 4) & 0xFFF; // 12-bit ADC result
 
-    // Convert to string
-    sprintf((char *)msg, "ADC: %ld", result);
-
-    // Display on LCD
+    lcd_clear();
+    lcd_print((unsigned char *)"ADC Val:");
+    sprintf((char *)msg, " %lu", result);
     lcd_print(msg);
 
-    // Clear interrupt flag (by reading ADDR4)
-    y = (LPC_ADC->ADDR4 >> 4) & 0xFFF;
+    y = (LPC_ADC->ADDR4 >> 4) & 0xFFF; // clear done flag
 }
 
 void lcd_init(void) {
@@ -59,6 +61,7 @@ void lcd_init(void) {
         lcd_write();
     }
     flag1 = 1;
+    delay_lcd(5000);
 }
 
 void lcd_print(unsigned char *text) {
@@ -70,6 +73,14 @@ void lcd_print(unsigned char *text) {
     }
 }
 
+void lcd_clear(void) {
+    flag1 = 0;
+    temp1 = 0x01; // clear command
+    lcd_write();
+    delay_lcd(5000);
+    flag1 = 1;
+}
+
 void lcd_write(void) {
     flag2 = (flag1 == 1) ? 0 : (((temp1 == 0x30) || (temp1 == 0x20)) ? 1 : 0);
 
@@ -100,6 +111,5 @@ 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++);
 }