ADC MEASUREMENT USING MBED & STM NUCLEO This program is about ADC MEASUREMENT,SMOOTHING THE ADC VALUE I used INA225 TEXAS INSTRUMENT BOARD FOR MEASURING LOW mA range DC current using ADC features of board. Created by : Jaydeep Shah -- radhey04ec@gmail.com
main.cpp
- Committer:
- radhey04ec
- Date:
- 2020-07-17
- Revision:
- 0:1bf58c6ad114
File content as of revision 0:1bf58c6ad114:
/* ADC TUTORIAL BASIC PART-1 NOTE : CLASS --> AnalogIn Object return value between 0 to 1 If 5 V system and you try to read 2.5 V from ADC PIN than OP = 0.5 PLEASE NOTE : MBED USE 3.3 Vref */ //PROGRAM_CREATED BY : -- radhey04ec@gmail.com //Hardware : STM32-NUCLEO-64 //MBED : OS PLATFORM //This program is dedicated to // INA-225 TEXAS INSTRUMENT BOARDS TO AMPLIFY LOW VOLTAGE SIGNAL WITH GAIN 200 //SHUNT RESISTOR = 0.6 Ohm //Vref : 3.3 // I (current) = ((((ADC O/P - Offset)) * 3.3) *200 ) / 0.6) * 1000 mA #include "mbed.h" AnalogIn ANG(PC_3); //Port pin PC_3 last pin for ADC -- Create object int main() { float AARAY[10],SUM=0; while(1) { for(int i =0;i <10 ; i++) //Array to make result smoother { AARAY[i] = ANG.read(); //Read the data ThisThread::sleep_for(20); //Thread sleep for make ADC ready for next result SUM = SUM + AARAY[i]; //Store result } float value = (SUM /10); //Finding Average value float current = (((((((value)) * 3.3)-0.28)/200)/0.6)*1000); //Finding current printf("\n Current (mA) = %f",current); //Print data on Serial console -- I used CoolTerm ThisThread::sleep_for(250); //Thread sleep SUM = 0; //At the end sum must be zero } }