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
Diff: main.cpp
- Revision:
- 0:1bf58c6ad114
diff -r 000000000000 -r 1bf58c6ad114 main.cpp --- /dev/null Thu Jan 01 00:00:00 1970 +0000 +++ b/main.cpp Fri Jul 17 10:37:19 2020 +0000 @@ -0,0 +1,46 @@ +/* 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 +} +} \ No newline at end of file