Ashok K
ANALOG TO DIGITAL CONVERSION WITHOUT USING READ AND ANALOG IN (FOR TEMPERATURE SENSOR AND C- CODE)
Revision 0:666052f13fcb, committed 2014-05-21
- Comitter:
- AshokK
- Date:
- Wed May 21 10:31:54 2014 +0000
- Commit message:
- ANALOG TO DIGITAL CONVERSION WITHOUT USING READ, ANALOGIN ....; ( FOR TEMPERATURE SENSOR AND POTENTIOMETER)
Changed in this revision
| main.cpp | Show annotated file Show diff for this revision Revisions of this file |
| mbed.bld | Show annotated file Show diff for this revision Revisions of this file |
diff -r 000000000000 -r 666052f13fcb main.cpp
--- /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
diff -r 000000000000 -r 666052f13fcb mbed.bld --- /dev/null Thu Jan 01 00:00:00 1970 +0000 +++ b/mbed.bld Wed May 21 10:31:54 2014 +0000 @@ -0,0 +1,1 @@ +http://mbed.org/users/mbed_official/code/mbed/builds/0b3ab51c8877 \ No newline at end of file