eLab Team / Mbed 2 deprecated analogRead

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Dependencies:   mbed

main.cpp@4:972778a8aca8, 2021-04-10 (annotated)

Committer:
elab
Date:
Sat Apr 10 12:13:04 2021 +0000
Revision:
4:972778a8aca8
Parent:
3:9d006b6e1d04 
10042021

Who changed what in which revision?

UserRevisionLine numberNew contents of line
CSTritt 0:2254358fce87 1 /*
CSTritt 0:2254358fce87 2 Project: analogRead
CSTritt 0:2254358fce87 3 File: main.cpp
CSTritt 0:2254358fce87 4
CSTritt 0:2254358fce87 5 Reads from analog input, streams ASCII text to std serial using printf and
CSTritt 1:8e3c0c69a6ca 6 lights onboard LED. Also demonstrates use of floating point literal suffix
CSTritt 1:8e3c0c69a6ca 7 toeliminate warning and int constants for HIGH and LOW.
CSTritt 0:2254358fce87 8
CSTritt 0:2254358fce87 9 Written by: Dr. C. S. Tritt
CSTritt 2:e0faf9e57796 10 Created: 3/27/17 (v. 1.1)
CSTritt 0:2254358fce87 11
CSTritt 0:2254358fce87 12 */
CSTritt 0:2254358fce87 13 #include "mbed.h"
CSTritt 0:2254358fce87 14
CSTritt 0:2254358fce87 15 const int HIGH = 1; // Optional, but makes code more readable.
CSTritt 0:2254358fce87 16 const int LOW = 0; // Optional, but makes code more readable.
CSTritt 0:2254358fce87 17
elab 4:972778a8aca8 18 AnalogIn analog_value(A1);
CSTritt 0:2254358fce87 19 DigitalOut led(LED1);
elab 3:9d006b6e1d04 20 PwmOut servo(D6);
CSTritt 0:2254358fce87 21
CSTritt 0:2254358fce87 22 int main() {
CSTritt 0:2254358fce87 23 float value; // Value to be read and sent to serial port.
elab 3:9d006b6e1d04 24 servo.period_ms(20);
CSTritt 0:2254358fce87 25 printf("\nAnalogIn example\n");
CSTritt 0:2254358fce87 26
CSTritt 0:2254358fce87 27 while(true) {
CSTritt 0:2254358fce87 28 value = analog_value.read(); // Read the analog input value (0 to 1)
CSTritt 0:2254358fce87 29 printf("Value = %f\n", value); // Send value as text via serial port.
elab 4:972778a8aca8 30 // printf("Value_int = %d\n", int(value*180)); // Send value as text via serial port.
elab 4:972778a8aca8 31 int angle = int(value*180);
elab 3:9d006b6e1d04 32 servo.pulsewidth_us(10*angle+500);
elab 3:9d006b6e1d04 33
CSTritt 0:2254358fce87 34 if (value > 0.5f) { // Activate built-in LED. The f is optional.
CSTritt 0:2254358fce87 35 led.write(HIGH);
CSTritt 0:2254358fce87 36 }
CSTritt 0:2254358fce87 37 else {
CSTritt 0:2254358fce87 38 led.write(LOW);
CSTritt 0:2254358fce87 39 }
CSTritt 2:e0faf9e57796 40 printf("LED = %d\n", (int) led.read()); // Send LED state via serial.
CSTritt 0:2254358fce87 41 wait(0.25); // 250 ms
CSTritt 0:2254358fce87 42 }
CSTritt 0:2254358fce87 43 }