Add ES/Lab/Lab10/ADC_Display.c

ES/Lab/Lab10/ADC_Display.c

@@ -0,0 +1,108 @@
+#include <LPC17xx.h>
+
+#define RS_CTRL 0x08000000
+#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: ");
+
+void lcd_write(void);
+void port_write(void);
+void delay_lcd(unsigned long);
+void display_adc(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;
+  LPC_PINCON->PINSEL3 = 3 << 28;
+  LPC_SC->PCONP = 1 << 12;
+
+  LPC_ADC->ADCR = 1 << 4 | 1 << 16 | 1 << 21;
+  LPC_ADC->ADINTEN = (1 << 4);
+
+  NVIC_EnableIRQ(ADC_IRQn);
+
+  flag1 = 0;
+
+  for (i = 0; i < 8; i++) {
+    temp1 = init_command[i];
+    lcd_write();
+  }
+
+  flag1 = 1;
+  i = 0;
+
+  while (msg[i] != '\0') {
+    temp1 = msg[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;
+}
+
+void ADC_IRQHandler(void) {
+  result = (LPC_ADC->ADGDR & (0xFFF << 4)) >> 4;
+  y = (LPC_ADC->ADDR4 & (0xFFF << 4)) >> 4;
+}