aadit/MIT-Curricular
1
0
Fork 0
Code Issues Pull requests Projects Releases Packages Wiki Activity Actions

PWM ESD, and ADC

Browse source
This commit is contained in:
sherlock 2025-10-23 12:31:58 +05:30
parent ccff363c5a
commit d1cd6b537c
3 changed files with 109 additions and 112 deletions
Download patch file Download diff file Expand all files Collapse all files

4
ES/Lab/Lab10/ADC_Display.c
View file

@ -5,7 +5,7 @@
#define EN_CTRL 0x10000000
#define DT_CTRL 0x07800000
unsigned long result, y,m;
unsigned long result, y, m;
unsigned long int temp1 = 0, temp2 = 0, i;
unsigned char flag1 = 0, flag2 = 0;
unsigned char msg[20];
@ -49,7 +49,7 @@ void ADC_IRQHandler(void) {
lcd_print(msg);
y = (LPC_ADC->ADDR4 >> 4) & 0xFFF; // clear done flag
for(m=0;m<1000000;m++);
}

160
ES/Lab/Lab11/PWM.c
View file

@ -1,117 +1,57 @@
#include <LPC17xx.h>
#include <stdio.h>
#include "LPC17xx.h"
#define RS_CTRL 0x08000000
#define EN_CTRL 0x10000000
#define DT_CTRL 0x07800000
unsigned long int duty_cycle = 0;
int direction = 1;
int step = 50;
unsigned long result, y,m;
unsigned long int temp1 = 0, temp2 = 0, i;
unsigned char flag1 = 0, flag2 = 0;
unsigned char msg[20];
void PWM1_IRQHandler(void)
{
if (LPC_PWM1->IR & (1 << 0))
{
if (direction == 1)
{
duty_cycle += step;
if (duty_cycle >= 3000)
{
duty_cycle = 3000;
direction = 0;
}
}
else
{
duty_cycle -= step;
if (duty_cycle <= 0)
{
duty_cycle = 0;
direction = 1;
}
}
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
lcd_print((unsigned char *)"ADC Val:"); // Idle message
ADC_init(); // Initialize ADC
while (1) {
// idle loop
LPC_PWM1->MR4 = duty_cycle;
LPC_PWM1->LER = (1 << 4);
LPC_PWM1->IR = (1 << 0);
}
}
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 << 21) | (1 << 16); // select AD0.4, burst mode, enable
LPC_ADC->ADINTEN = (1 << 4); // Enable interrupt for AD0.4
NVIC_EnableIRQ(ADC_IRQn);
}
void ADC_IRQHandler(void) {
result = (LPC_ADC->ADGDR >> 4) & 0xFFF; // 12-bit ADC result
lcd_clear();
lcd_print((unsigned char *)"ADC Val:");
sprintf((char *)msg, " %lu", result);
lcd_print(msg);
y = (LPC_ADC->ADDR4 >> 4) & 0xFFF; // clear done flag
for(m=0;m<1000000;m++);
}
void lcd_init(void) {
unsigned long int init_command[] =
{0x30, 0x30, 0x30, 0x20, 0x28, 0x0C, 0x01, 0x80};
flag1 = 0;
for (i = 0; i < 8; i++) {
temp1 = init_command[i];
lcd_write();
}
flag1 = 1;
delay_lcd(5000);
}
void lcd_print(unsigned char *text) {
unsigned int j = 0;
while (text[j] != '\0') {
temp1 = text[j];
lcd_write();
j++;
}
}
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);
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(50000);
}
void delay_lcd(unsigned long r1) {
unsigned long r;
for (r = 0; r < r1; r++);
int main(void)
{
LPC_PINCON->PINSEL3 |= (2 << 14);
LPC_PWM1->TCR = (1 << 1);
LPC_PWM1->CTCR = 0;
LPC_PWM1->PR = 0;
LPC_PWM1->MR0 = 3000;
LPC_PWM1->MR4 = duty_cycle;
LPC_PWM1->MCR = (1 << 1) | (1 << 0);
LPC_PWM1->PCR = (1 << 12);
LPC_PWM1->LER = (1 << 0) | (1 << 4);
NVIC_EnableIRQ(PWM1_IRQn);
LPC_PWM1->TCR = (1 << 0) | (1 << 3);
while (1);
}

57
ES/Lab/Lab11/PWM_Keyboard.c Normal file
View file

@ -0,0 +1,57 @@
#include "LPC17xx.h"
unsigned long int duty_cycle = 0;
int direction = 1;
int step = 50;
void PWM1_IRQHandler(void)
{
if (LPC_PWM1->IR & (1 << 0))
{
if (direction == 1)
{
duty_cycle += step;
if (duty_cycle >= 3000)
{
duty_cycle = 3000;
direction = 0;
}
}
else
{
duty_cycle -= step;
if (duty_cycle <= 0)
{
duty_cycle = 0;
direction = 1;
}
}
LPC_PWM1->MR4 = duty_cycle;
LPC_PWM1->LER = (1 << 4);
LPC_PWM1->IR = (1 << 0);
}
}
int main(void)
{
LPC_PINCON->PINSEL3 |= (2 << 14);
LPC_PWM1->TCR = (1 << 1);
LPC_PWM1->CTCR = 0;
LPC_PWM1->PR = 0;
LPC_PWM1->MR0 = 3000;
LPC_PWM1->MR4 = duty_cycle;
LPC_PWM1->MCR = (1 << 1) | (1 << 0);
LPC_PWM1->PCR = (1 << 12);
LPC_PWM1->LER = (1 << 0) | (1 << 4);
NVIC_EnableIRQ(PWM1_IRQn);
LPC_PWM1->TCR = (1 << 0) | (1 << 3);
while (1);
}