eLab Team / Mbed 2 deprecated analogRead

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Dependencies:   mbed

main.cpp@3:9d006b6e1d04, 2021-03-27 (annotated)

Committer:
elab
Date:
Sat Mar 27 13:19:00 2021 +0000
Revision:
3:9d006b6e1d04
Parent:
2:e0faf9e57796
Child:
4:972778a8aca8
1st commit;

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 3:9d006b6e1d04 18 AnalogIn analog_value(A0);
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 int i=0, angle;
elab 3:9d006b6e1d04 25 servo.period_ms(20);
CSTritt 0:2254358fce87 26
CSTritt 0:2254358fce87 27 printf("\nAnalogIn example\n");
CSTritt 0:2254358fce87 28
CSTritt 0:2254358fce87 29 while(true) {
CSTritt 0:2254358fce87 30 value = analog_value.read(); // Read the analog input value (0 to 1)
CSTritt 0:2254358fce87 31 printf("Value = %f\n", value); // Send value as text via serial port.
elab 3:9d006b6e1d04 32 printf("Value_int = %d\n", int(value*180)); // Send value as text via serial port.
elab 3:9d006b6e1d04 33 angle = int(value*180);
elab 3:9d006b6e1d04 34 servo.pulsewidth_us(10*angle+500);
elab 3:9d006b6e1d04 35 wait_ms(10);
elab 3:9d006b6e1d04 36
elab 3:9d006b6e1d04 37
CSTritt 0:2254358fce87 38 if (value > 0.5f) { // Activate built-in LED. The f is optional.
CSTritt 0:2254358fce87 39 led.write(HIGH);
CSTritt 0:2254358fce87 40 }
CSTritt 0:2254358fce87 41 else {
CSTritt 0:2254358fce87 42 led.write(LOW);
CSTritt 0:2254358fce87 43 }
CSTritt 2:e0faf9e57796 44 printf("LED = %d\n", (int) led.read()); // Send LED state via serial.
CSTritt 0:2254358fce87 45 wait(0.25); // 250 ms
elab 3:9d006b6e1d04 46
elab 3:9d006b6e1d04 47 // for (i=0; i<=200; i++){
elab 3:9d006b6e1d04 48 // servo.pulsewidth_us(10*i+500);
elab 3:9d006b6e1d04 49 // wait_ms(10);
elab 3:9d006b6e1d04 50 // }
elab 3:9d006b6e1d04 51 // for (i=0; i<=200; i++){
elab 3:9d006b6e1d04 52 // servo.pulsewidth_us(-10*i+2500);
elab 3:9d006b6e1d04 53 // wait_ms(10);
elab 3:9d006b6e1d04 54 // }
elab 3:9d006b6e1d04 55
elab 3:9d006b6e1d04 56
CSTritt 0:2254358fce87 57 }
CSTritt 0:2254358fce87 58 }