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Updated data for ES

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This commit is contained in:
sherlock 2025-10-16 12:24:50 +05:30
parent a900dee866
commit 8d75a2dd24
1 changed files with 51 additions and 34 deletions
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85
ES/Lab/Lab10/ADC_Display.c
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@ -1,68 +1,84 @@
#include <LPC17xx.h> #include <LPC17xx.h>
#include <stdio.h>
#define RS_CTRL 0x08000000 #define RS_CTRL 0x08000000
#define EN_CTRL 0x10000000 #define EN_CTRL 0x10000000
#define DT_CTRL 0x07800000 #define DT_CTRL 0x07800000
unsigned long int temp1 = 0, temp2 = 0, i, j; unsigned long result, y; // ADC Result
unsigned long int temp1 = 0, temp2 = 0, i;
unsigned char flag1 = 0, flag2 = 0; unsigned char flag1 = 0, flag2 = 0;
unsigned long result, y; // ADC result unsigned char msg[20]; // To store the ADC value string
void lcd_write(void); void lcd_write(void);
void port_write(void); void port_write(void);
void delay_lcd(unsigned long); void delay_lcd(unsigned long);
void lcd_init(void);
void lcd_print(unsigned char *);
void ADC_IRQHandler(void);
void ADC_init(void);
unsigned long int init_command[] = {0x30, 0x30, 0x30, 0x20, 0x28, 0x0C, 0x01, 0x80}; int main(void) {
LPC_GPIO0->FIODIR = DT_CTRL | RS_CTRL | EN_CTRL; // LCD pins as output
lcd_init(); // initialize LCD
ADC_init(); // initialize ADC
void ADC_Init(void) { while (1) {
LPC_PINCON->PINSEL3 = 3 << 28; // main loop does nothing, display will update via interrupt
LPC_SC->PCONP = 1 << 12; }
LPC_ADC->ADCR = 1 << 4 | 1 << 16 | 1 << 21; }
LPC_ADC->ADINTEN = (1 << 4);
void ADC_init(void) {
LPC_PINCON->PINSEL3 = 3 << 28; // P1.30 as AD0.4
LPC_SC->PCONP = 1 << 12; // Power to ADC
LPC_ADC->ADCR = (1 << 4) | (1 << 16) | (1 << 21); // select AD0.4, burst mode, enable
LPC_ADC->ADINTEN = (1 << 4); // Enable interrupt for AD0.4
NVIC_EnableIRQ(ADC_IRQn); NVIC_EnableIRQ(ADC_IRQn);
} }
void ADC_IRQHandler(void) { void ADC_IRQHandler(void) {
result = (LPC_ADC->ADGDR & (0xFFF << 4)) >> 4; result = (LPC_ADC->ADGDR >> 4) & 0xFFF; // Get 12-bit ADC result
y = (LPC_ADC->ADDR4 & (0xFFF << 4)) >> 4;
// Convert to string
sprintf((char *)msg, "ADC: %ld", result);
// Display on LCD
lcd_print(msg);
// Clear interrupt flag (by reading ADDR4)
y = (LPC_ADC->ADDR4 >> 4) & 0xFFF;
} }
int main() { void lcd_init(void) {
LPC_GPIO0->FIODIR = DT_CTRL | RS_CTRL | EN_CTRL; unsigned long int init_command[] =
ADC_Init(); {0x30, 0x30, 0x30, 0x20, 0x28, 0x0C, 0x01, 0x80};
flag1 = 0; flag1 = 0;
for (i = 0; i < 8; i++) { for (i = 0; i < 8; i++) {
temp1 = init_command[i]; temp1 = init_command[i];
lcd_write(); lcd_write();
} }
flag1 = 1; flag1 = 1;
delay_lcd(500000); }
// Convert result to 4 ASCII digits void lcd_print(unsigned char *text) {
unsigned char digits[4]; unsigned int j = 0;
digits[0] = (result / 1000) % 10 + '0'; while (text[j] != '\0') {
digits[1] = (result / 100) % 10 + '0'; temp1 = text[j];
digits[2] = (result / 10) % 10 + '0';
digits[3] = result % 10 + '0';
for (i = 0; i < 4; i++) {
temp1 = digits[i];
lcd_write(); lcd_write();
j++;
} }
while (1);
} }
void lcd_write(void) { void lcd_write(void) {
flag2 = (flag1 == 1) ? 0 : (((temp1 == 0x30) || (temp1 == 0x20)) ? 1 : 0); flag2 = (flag1 == 1) ? 0 : (((temp1 == 0x30) || (temp1 == 0x20)) ? 1 : 0);
temp2 = temp1 & 0xf0;
temp2 = temp1 & 0xF0;
temp2 = temp2 << 19; temp2 = temp2 << 19;
port_write(); port_write();
if (!flag2) { if (!flag2) {
temp2 = temp1 & 0x0f; temp2 = temp1 & 0x0F;
temp2 = temp2 << 23; temp2 = temp2 << 23;
port_write(); port_write();
} }
@ -70,19 +86,20 @@ void lcd_write(void) {
void port_write(void) { void port_write(void) {
LPC_GPIO0->FIOPIN = temp2; LPC_GPIO0->FIOPIN = temp2;
if (flag1 == 0) {
if (flag1 == 0)
LPC_GPIO0->FIOCLR = RS_CTRL; LPC_GPIO0->FIOCLR = RS_CTRL;
} else { else
LPC_GPIO0->FIOSET = RS_CTRL; LPC_GPIO0->FIOSET = RS_CTRL;
}
LPC_GPIO0->FIOSET = EN_CTRL; LPC_GPIO0->FIOSET = EN_CTRL;
delay_lcd(100); delay_lcd(100);
LPC_GPIO0->FIOCLR = EN_CTRL; LPC_GPIO0->FIOCLR = EN_CTRL;
delay_lcd(500000); delay_lcd(50000);
} }
void delay_lcd(unsigned long r1) { void delay_lcd(unsigned long r1) {
unsigned long r; unsigned long r;
for (r = 0; r < r1; r++); for (r = 0; r < r1; r++)
return; ;
} }