Revision 0:0864ce74d7b0, committed 2014-05-27

Comitter:

AshokK

Date:

Tue May 27 12:50:43 2014 +0000

Commit message:

PROGRAM TO BLINK LED WITHOUT USING DIGITAL OUT AND WAIT FUNCTION(IT IS A PURE C CODE FOR LED BLINK AND DELAY)

Changed in this revision

diff -r 000000000000 -r 0864ce74d7b0 main.cpp
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/main.cpp	Tue May 27 12:50:43 2014 +0000
@@ -0,0 +1,46 @@
+#include "mbed.h"
+#define PRESCALAR 25000    ///(i,e 
+Serial pc(USBTX, USBRX);
+void pclock()
+{
+     LPC_SC->PCONP |= (1<<15); // power up GPIO
+     LPC_SC->PCONP|=(1<<1);///////conp for timer
+    LPC_SC->PCLKSEL0|=(0<<3);////cclk/4
+    }
+void inittimer()
+{
+    pc.printf("timer\n");
+    LPC_TIM0->CTCR&= ~(1<<0);// SELECT TIMER
+    LPC_TIM0->PR = PRESCALAR-1;/// ASSIGN PRESCALAR
+    int value=LPC_TIM0->PR;
+    pc.printf("%d\n",value);
+    LPC_TIM0->TCR=(1<<0);// enable timer
+    LPC_TIM0->TCR =(1<<1);/// RESET TIMER
+}    
+void delay ( unsigned int millisec)
+{
+     pc.printf("millisec\n");
+     LPC_TIM0->TCR = (1<<1);///n RESET TIMER
+     LPC_TIM0->TCR = (1<<0);// enable timer
+     pc.printf("%d\n",LPC_TIM0->TC); 
+     while(LPC_TIM0->TC < millisec);
+     LPC_TIM0->TCR&= ~(1<<0);// disable timer
+     pc.printf("disabled\n");
+}
+ int main()
+ { 
+ pclock();
+ inittimer();
+ 
+ while(1)
+ {
+   int value= LPC_TIM0->TC;
+   pc.printf("values %d",value);
+  LPC_PINCON->PINSEL3|=(1<<4);///LED 1 COONECTEED TO P1.20
+    delay(500);
+     LPC_PINCON->PINSEL3 &= ~(1<<4);
+    delay(500);
+  
+  }
+     }
+     
\ No newline at end of file

diff -r 000000000000 -r 0864ce74d7b0 mbed.bld
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/mbed.bld	Tue May 27 12:50:43 2014 +0000
@@ -0,0 +1,1 @@
+http://mbed.org/users/mbed_official/code/mbed/builds/0b3ab51c8877
\ No newline at end of file