Updated data for ES

ES/Lab/Lab10/ADC_Display.c

@@ -4,105 +4,124 @@
 #define EN_CTRL 0x10000000
 #define DT_CTRL 0x07800000
 
-unsigned long result, y;
 unsigned long int temp1 = 0, temp2 = 0, i, j;
 unsigned char flag1 = 0, flag2 = 0;
-unsigned char msg[] = ("ADC: ");
+unsigned long result, y; // ADC variables
+unsigned char adc_string[10]; // Buffer for ADC result string
 
 void lcd_write(void);
 void port_write(void);
 void delay_lcd(unsigned long);
-void display_adc(unsigned long);
+void int_to_string(unsigned long num, unsigned char* str);
 
-unsigned long int init_command[] = {
-  0x30, 0x30, 0x30, 0x20, 0x28, 0x0C, 0x01, 0x80
-};
+unsigned long int init_command[] = {0x30, 0x30, 0x30, 0x20, 0x28, 0x0C, 0x01, 0x80};
 
 int main() {
-  LPC_GPIO0->FIODIR = DT_CTRL | RS_CTRL | EN_CTRL;
-  LPC_PINCON->PINSEL3 = 3 << 28;
-  LPC_SC->PCONP = 1 << 12;
+    // LCD GPIO setup
+    LPC_GPIO0->FIODIR = DT_CTRL | RS_CTRL | EN_CTRL;
 
-  LPC_ADC->ADCR = 1 << 4 | 1 << 16 | 1 << 21;
-  LPC_ADC->ADINTEN = (1 << 4);
+    // ADC setup
+    LPC_PINCON->PINSEL3 = 3 << 28; // P1.30 function 3
+    LPC_SC->PCONP = 1 << 12; // power control
+    LPC_ADC->ADCR = 1 << 4 | 1 << 16 | 1 << 21; // ADC4, burst mode, enable
+    LPC_ADC->ADINTEN = (1 << 4); // Interrupt enable
+    NVIC_EnableIRQ(ADC_IRQn);
 
-  NVIC_EnableIRQ(ADC_IRQn);
+    // LCD initialization
+    flag1 = 0;
+    for (i = 0; i < 8; i++) {
+        temp1 = init_command[i];
+        lcd_write();
+    }
 
-  flag1 = 0;
+    flag1 = 1;
 
-  for (i = 0; i < 8; i++) {
-    temp1 = init_command[i];
-    lcd_write();
-  }
+    while(1) {
+        // Convert ADC result to string and display
+        int_to_string(result, adc_string);
 
-  flag1 = 1;
-  i = 0;
+        // Clear display and reset cursor
+        flag1 = 0;
+        temp1 = 0x01; // Clear display
+        lcd_write();
+        temp1 = 0x80; // Set cursor to home
+        lcd_write();
+        flag1 = 1;
 
-  while (msg[i] != '\0') {
-    temp1 = msg[i];
-    i++;
-    lcd_write();
-  }
+        // Display the ADC result
+        i = 0;
+        while(adc_string[i] != '\0') {
+            temp1 = adc_string[i];
+            i++;
+            lcd_write();
+        }
 
-  display_adc(result);
-
-  while (1);
-}
-
-void display_adc(unsigned long adc_val) {
-  unsigned char digits[4];
-  int k;
-
-  digits[0] = (adc_val / 1000) % 10 + 0x30;
-  digits[1] = (adc_val / 100) % 10 + 0x30;
-  digits[2] = (adc_val / 10) % 10 + 0x30;
-  digits[3] = adc_val % 10 + 0x30;
-
-  for (k = 0; k < 4; k++) {
-    temp1 = digits[k];
-    lcd_write();
-  }
-}
-
-void lcd_write(void) {
-  flag2 = (flag1 == 1) ? 0 : (((temp1 == 0x30) || (temp1 == 0x20)) ? 1 : 0);
-
-  temp2 = temp1 & 0xf0;
-  temp2 = temp2 << 19;
-
-  port_write();
-
-  if (!flag2) {
-    temp2 = temp1 & 0x0f;
-    temp2 = temp2 << 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++);
-  return;
+        delay_lcd(5000000); // Update every ~1 second
+    }
 }
 
 void ADC_IRQHandler(void) {
-  result = (LPC_ADC->ADGDR & (0xFFF << 4)) >> 4;
-  y = (LPC_ADC->ADDR4 & (0xFFF << 4)) >> 4;
-}
+    result = (LPC_ADC->ADGDR & (0xFFF << 4)) >> 4; // Read 12-bit ADC result
+    y = (LPC_ADC->ADDR4 & (0xFFF << 4)) >> 4; // Done bit reset
+}
+
+void int_to_string(unsigned long num, unsigned char* str) {
+    int i = 0, j;
+    unsigned char temp;
+
+    // Handle zero case
+    if (num == 0) {
+        str[0] = '0';
+        str[1] = '\0';
+        return;
+    }
+
+    // Convert number to string (reverse order)
+    while (num > 0) {
+        str[i++] = (num % 10) + '0';
+        num /= 10;
+    }
+    str[i] = '\0';
+
+    // Reverse the string
+    for (j = 0; j < i/2; j++) {
+        temp = str[j];
+        str[j] = str[i-1-j];
+        str[i-1-j] = temp;
+    }
+}
+
+void lcd_write(void) {
+    flag2 = (flag1 == 1) ? 0 : (((temp1 == 0x30) || (temp1 == 0x20)) ? 1 : 0);
+
+    temp2 = temp1 & 0xf0;
+    temp2 = temp2 << 19;
+    port_write();
+
+    if (!flag2) {
+        temp2 = temp1 & 0x0f;
+        temp2 = temp2 << 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++);
+    return;
+}