Simple analog read demonstration. Also streams value to serial port and lights LED. Does not use overloaded operators. The first of a collection of five basic demonstration projects.
Diff: main.cpp
- Revision:
- 0:2254358fce87
- Child:
- 1:8e3c0c69a6ca
--- /dev/null Thu Jan 01 00:00:00 1970 +0000 +++ b/main.cpp Mon Mar 27 12:48:54 2017 +0000 @@ -0,0 +1,38 @@ +/* + Project: analogRead + 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 sufix to + eliminate warning and int constants for HIGH and LOW. + + Written by: Dr. C. S. Tritt + Created: 3/26/17 (v. 1.0) + +*/ +#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); + +DigitalOut led(LED1); + +int main() { + float value; // Value to be read and sent to serial port. + + printf("\nAnalogIn example\n"); + + 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); + } + wait(0.25); // 250 ms + } +}