From 0290f584b3c18c1a1994ef4db60b216098d23771 Mon Sep 17 00:00:00 2001
From: sherlock <aadit@aaditagrawal.com>
Date: Thu, 23 Oct 2025 11:44:39 +0530
Subject: [PATCH] doc update ESD

---
 ES/Lab/Lab11/PWM.c | 58 ++++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 58 insertions(+)
 create mode 100644 ES/Lab/Lab11/PWM.c

diff --git a/ES/Lab/Lab11/PWM.c b/ES/Lab/Lab11/PWM.c
new file mode 100644
index 0000000..92c643e
--- /dev/null
+++ b/ES/Lab/Lab11/PWM.c
@@ -0,0 +1,58 @@
+#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)
+        ;
+}