Diff: main.cpp

Revision:

0:666052f13fcb

--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/main.cpp	Wed May 21 10:31:54 2014 +0000
@@ -0,0 +1,63 @@
+#include "mbed.h"
+Serial pc(USBTX,USBRX);
+int value1;
+int value;
+ void initadc()
+{
+      pc.printf("in adc\n");
+      LPC_SC->PCONP|=(1<<15);/// SELECT PCONP GPIO  15th pin
+      LPC_SC->PCONP|=(1<<12);/// SELECT PCONP PCADC  12TH pin
+      LPC_SC->PCLKSEL0 &= ~ (1<<24);
+      LPC_SC->PCLKSEL0 &= ~(1<<25);//SETTING UP OF CCLK for 25Mhz;
+      int CCLK = LPC_ADC->ADCR|=(7<<8); ///SET PRESCALAR VALUE /1 so that it works at 13mhz;
+      pc.printf("cclkvalue is %d\n",CCLK);
+      LPC_PINCON->PINSEL1|=(1<<14);/// select pin (p0.23 ad0.0)
+      LPC_PINCON->PINMODE1|=(2<<15);///
+      LPC_ADC->ADCR |=(1<<21); //ADC on
+      LPC_ADC->ADINTEN |=(1<<0); /// interrupt enable on dis pin 
+}
+void initchan(int ch)
+{
+    LPC_ADC->ADCR|=(1<<ch);//SELECT CHANNEL(SEL BITS)
+    pc.printf("in channel");
+}
+ void startadc()
+{
+    LPC_ADC->ADCR=(1<<24);
+ }
+int main()
+{
+    initadc();
+    initchan(0);
+     while(1)  
+    {   
+    pc.printf("in main\n");
+           // startadc();
+    LPC_ADC->ADCR |= (1<<24); // START = start conversion now   
+     while ((LPC_ADC->ADGDR & (0x80000000))==0); //wait till done bit in adcr is set
+      /* Wait for Conversion end       */  
+     int value = (LPC_ADC->ADDR0 >> 4) & 0xFFF;
+     pc.printf("adc is %f\n",(value*100)*(3.3/4096));  
+              }
+}
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\ No newline at end of file