The program reads an analog voltage from a potentiometer and lights the Nucleo board's built-in LED based on its value.
Fork of analogRead by
main.cpp
- Committer:
- CSTritt
- Date:
- 2017-09-22
- Revision:
- 3:0756601ff19e
- Parent:
- 2:e0faf9e57796
File content as of revision 3:0756601ff19e:
/* Project: aReadConditional (for analog read conditional) File: main.cpp Reads from analog input, streams ASCII text to std serial using printf and lights onboard LED. Also demonstrates use of floating point literal suffix toeliminate warning and int constants for HIGH and LOW. Written by: Dr. C. S. Tritt Created: 3/27/17 (v. 1.1) */ #include "mbed.h" const int HIGH = 1; // Optional, but makes code more readable. const int LOW = 0; // Optional, but makes code more readable. AnalogIn analog_value(A0); // Construct AnalogIn object called analog_value. DigitalOut led(LED1); // Construct DigitalOut object called led. int main() { float value; // Value to be read and sent to serial port. printf("\nAnalogIn example\n"); // Identify program. while(true) { value = analog_value.read(); // Read the analog input value (0 to 1) printf("Value = %f\n", value); // Send value as text via serial port. if (value > 0.5f) { // Activate built-in LED. The f is optional. led.write(HIGH); } else { led.write(LOW); } printf("LED = %d\n", (int) led.read()); // Send LED state via serial. wait(0.5); // Half a second (500 mS). } }