Ashok K / Mbed 2 deprecated ADCWITHOUT

ANALOG TO DIGITAL CONVERSION WITHOUT USING READ AND ANALOG IN (FOR TEMPERATURE SENSOR AND C- CODE)

Dependencies:   mbed

main.cpp@0:666052f13fcb, 2014-05-21 (annotated)

Committer:
AshokK
Date:
Wed May 21 10:31:54 2014 +0000
Revision:
0:666052f13fcb
ANALOG TO DIGITAL CONVERSION WITHOUT USING READ, ANALOGIN ....; ( FOR TEMPERATURE SENSOR AND POTENTIOMETER)

Who changed what in which revision?

UserRevisionLine numberNew contents of line
AshokK 0:666052f13fcb 1 #include "mbed.h"
AshokK 0:666052f13fcb 2 Serial pc(USBTX,USBRX);
AshokK 0:666052f13fcb 3 int value1;
AshokK 0:666052f13fcb 4 int value;
AshokK 0:666052f13fcb 5 void initadc()
AshokK 0:666052f13fcb 6 {
AshokK 0:666052f13fcb 7 pc.printf("in adc\n");
AshokK 0:666052f13fcb 8 LPC_SC->PCONP|=(1<<15);/// SELECT PCONP GPIO 15th pin
AshokK 0:666052f13fcb 9 LPC_SC->PCONP|=(1<<12);/// SELECT PCONP PCADC 12TH pin
AshokK 0:666052f13fcb 10 LPC_SC->PCLKSEL0 &= ~ (1<<24);
AshokK 0:666052f13fcb 11 LPC_SC->PCLKSEL0 &= ~(1<<25);//SETTING UP OF CCLK for 25Mhz;
AshokK 0:666052f13fcb 12 int CCLK = LPC_ADC->ADCR|=(7<<8); ///SET PRESCALAR VALUE /1 so that it works at 13mhz;
AshokK 0:666052f13fcb 13 pc.printf("cclkvalue is %d\n",CCLK);
AshokK 0:666052f13fcb 14 LPC_PINCON->PINSEL1|=(1<<14);/// select pin (p0.23 ad0.0)
AshokK 0:666052f13fcb 15 LPC_PINCON->PINMODE1|=(2<<15);///
AshokK 0:666052f13fcb 16 LPC_ADC->ADCR |=(1<<21); //ADC on
AshokK 0:666052f13fcb 17 LPC_ADC->ADINTEN |=(1<<0); /// interrupt enable on dis pin
AshokK 0:666052f13fcb 18 }
AshokK 0:666052f13fcb 19 void initchan(int ch)
AshokK 0:666052f13fcb 20 {
AshokK 0:666052f13fcb 21 LPC_ADC->ADCR|=(1<<ch);//SELECT CHANNEL(SEL BITS)
AshokK 0:666052f13fcb 22 pc.printf("in channel");
AshokK 0:666052f13fcb 23 }
AshokK 0:666052f13fcb 24 void startadc()
AshokK 0:666052f13fcb 25 {
AshokK 0:666052f13fcb 26 LPC_ADC->ADCR=(1<<24);
AshokK 0:666052f13fcb 27 }
AshokK 0:666052f13fcb 28 int main()
AshokK 0:666052f13fcb 29 {
AshokK 0:666052f13fcb 30 initadc();
AshokK 0:666052f13fcb 31 initchan(0);
AshokK 0:666052f13fcb 32 while(1)
AshokK 0:666052f13fcb 33 {
AshokK 0:666052f13fcb 34 pc.printf("in main\n");
AshokK 0:666052f13fcb 35 // startadc();
AshokK 0:666052f13fcb 36 LPC_ADC->ADCR |= (1<<24); // START = start conversion now
AshokK 0:666052f13fcb 37 while ((LPC_ADC->ADGDR & (0x80000000))==0); //wait till done bit in adcr is set
AshokK 0:666052f13fcb 38 /* Wait for Conversion end */
AshokK 0:666052f13fcb 39 int value = (LPC_ADC->ADDR0 >> 4) & 0xFFF;
AshokK 0:666052f13fcb 40 pc.printf("adc is %f\n",(value*100)*(3.3/4096));
AshokK 0:666052f13fcb 41 }
AshokK 0:666052f13fcb 42 }
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