-m updating C-programming

participants/fares.ahmad/C-programming/C-programming.html

@@ -131,7 +131,9 @@ code > span.in { color: #60a0b0; font-weight: bold; font-style: italic; } /* Inf
 
 <span class="co">MIT License</span>
 <span class="co">*/</span>
-<span class="ot">#define F_CPU 1000000UL</span>
+<span class="ot">#define F_CPU 1000000UL </span><span class="co">//Define speed</span>
+
+<span class="co">//Define Macron</span>
 <span class="ot">#define setbit(register, bit)   (register) |= (1 &lt;&lt; (bit))</span>
 <span class="ot">#define clearbit(register, bit)   (register) &amp;= ~(1 &lt;&lt; (bit))</span>
 <span class="ot">#define testbit(register, bit)   (register) &amp; (1 &lt;&lt; (bit))</span>
@@ -159,6 +161,48 @@ code > span.in { color: #60a0b0; font-weight: bold; font-style: italic; } /* Inf
 
 }</code></pre></div>
 <h2 id="interrupts">Interrupts</h2>
+<p>Interrupts are used to force the microcontroller to pause the code and execute a specific block of code inside ISR function.</p>
+<p>I have used interrupts to switch on an LED when a button is pressed instead of asking the microcontroller &quot;Is button pressed?&quot; by continuously reading the PB2 statues.</p>
+<div class="sourceCode"><pre class="sourceCode c"><code class="sourceCode c"><span class="co">/*</span>
+<span class="co">This program was created by Ahmad Fares on 7th-Dec-2017</span>
+<span class="co">The purpose of this program is to use interrupt to detect a button statues</span>
+<span class="co">MIT License</span>
+<span class="co">*/</span>
+
+<span class="ot">#define F_CPU 1000000UL </span><span class="co">//Define speed</span>
+
+<span class="co">//Define Macron</span>
+<span class="ot">#define setbit(register, bit)   (register) |= (1 &lt;&lt; (bit))</span>
+<span class="ot">#define clearbit(register, bit)   (register) &amp;= ~(1 &lt;&lt; (bit))</span>
+<span class="ot">#define testbit(register, bit)   (register) &amp; (1 &lt;&lt; (bit))</span>
+
+<span class="ot">#include &lt;avr/interrupt.h&gt;</span>
+<span class="ot">#include &lt;avr/io.h&gt;</span>
+
+
+<span class="co">// Interrup function, PCINT1_vect is the vector for interrupt request </span>
+ ISR(PCINT1_vect)
+{
+ <span class="kw">if</span> ( PINB &amp; (<span class="dv">1</span>&lt;&lt;PB2) ) <span class="co">// test PINA7 if true then</span>
+  setbit(PORTA,PA3); <span class="co">//turn off LED</span>
+ <span class="kw">else</span>
+  clearbit(PORTA,PA3); <span class="co">//Turn on LED</span>
+}
+
+<span class="dt">int</span> main (<span class="dt">void</span>){
+  sei(); <span class="co">// activate interrupts globally</span>
+  setbit(DDRA, PA3); <span class="co">// set PA3 as output in DDRA.</span>
+  clearbit(DDRB, PB2); <span class="co">// set PB2 as input in DDRB.</span>
+  setbit(PORTB, PB2); <span class="co">// activate pull up resistor.</span>
+  setbit(GIMSK,PCIE1); <span class="co">//Enable pin change interrupt PORTB</span>
+  setbit(PCMSK1, PCINT10); <span class="co">//Enabl pin change interrupt in pin PB2</span>
+  setbit(PINA,PA3);
+
+<span class="kw">while</span>(<span class="dv">1</span>){
+<span class="co">//Doing nothing until the interrupt occurs</span>
+}
+}
+</code></pre></div>
 <h2 id="timers">Timers</h2>
 <h2 id="count-1-seconds-for-1-mhz-rule-of-thirds">Count 1 seconds for 1 Mhz (Rule of thirds)</h2>
 <h2 id="adc">ADC</h2>

participants/fares.ahmad/C-programming/C-programming.md

@@ -111,7 +111,9 @@ The code is used to switch on an LED when a Button is pressed using macron metho
 
 MIT License
 */
-#define F_CPU 1000000UL
+#define F_CPU 1000000UL //Define speed
+
+//Define Macron
 #define setbit(register, bit)   (register) |= (1 << (bit))
 #define clearbit(register, bit)   (register) &= ~(1 << (bit))
 #define testbit(register, bit)   (register) & (1 << (bit))
@@ -143,7 +145,53 @@ int main (void)
 
 ## Interrupts
 
+Interrupts are used to force the microcontroller to pause the code and execute a specific block of code inside ISR function.
+
+I have used interrupts to switch on an LED when a button is pressed instead of asking the microcontroller "Is button pressed?" by continuously reading the PB2 statues.
+
+```C
+/*
+This program was created by Ahmad Fares on 7th-Dec-2017
+The purpose of this program is to use interrupt to detect a button statues
+MIT License
+*/
+
+#define F_CPU 1000000UL //Define speed
+
+//Define Macron
+#define setbit(register, bit)   (register) |= (1 << (bit))
+#define clearbit(register, bit)   (register) &= ~(1 << (bit))
+#define testbit(register, bit)   (register) & (1 << (bit))
 
+#include <avr/interrupt.h>
+#include <avr/io.h>
+
+
+// Interrup function, PCINT1_vect is the vector for interrupt request 
+ ISR(PCINT1_vect)
+{
+ if ( PINB & (1<<PB2) ) // test PINA7 if true then
+  setbit(PORTA,PA3); //turn off LED
+ else
+  clearbit(PORTA,PA3); //Turn on LED
+}
+
+int main (void){
+  sei(); // activate interrupts globally
+  setbit(DDRA, PA3); // set PA3 as output in DDRA.
+  clearbit(DDRB, PB2); // set PB2 as input in DDRB.
+  setbit(PORTB, PB2); // activate pull up resistor.
+  setbit(GIMSK,PCIE1); //Enable pin change interrupt PORTB
+  setbit(PCMSK1, PCINT10); //Enabl pin change interrupt in pin PB2
+  setbit(PINA,PA3);
+
+while(1){
+//Doing nothing until the interrupt occurs
+}
+}
+
+
+```
 
 ## Timers
 

participants/fares.ahmad/CAD /3D-Design.md

+# 3D Design
+
+## Introduction
+## Antimony
+## FreeCad
+## Opnescad