Charles Tritt / Mbed 2 deprecated analogRead_u16

The 2nd of 5 mbed demonstration projects. Unsigned short analog read demonstration. Reads from analog input, streams ASCII text to std serial using printf and lights on board LED. Also demonstrates use of integer literal suffixes and int constants for HIGH and LOW.

Dependencies:   mbed

main.cpp@0:753e269a13b9, 2017-03-27 (annotated)

Committer:
CSTritt
Date:
Mon Mar 27 12:49:08 2017 +0000
Revision:
0:753e269a13b9
Version 1.

Who changed what in which revision?

UserRevisionLine numberNew contents of line
CSTritt 0:753e269a13b9 1 /*
CSTritt 0:753e269a13b9 2 Project: analogRead_u16
CSTritt 0:753e269a13b9 3 File: main.cpp
CSTritt 0:753e269a13b9 4
CSTritt 0:753e269a13b9 5 Reads from analog input, streams ASCII text to std serial using printf and
CSTritt 0:753e269a13b9 6 lights onboard LED. Also demonstrates use of integer literal suffixes
CSTritt 0:753e269a13b9 7 and constants for HIGH and LOW.
CSTritt 0:753e269a13b9 8
CSTritt 0:753e269a13b9 9 Written by: Dr. C. S. Tritt
CSTritt 0:753e269a13b9 10 Created: 3/26/17 (v. 1.0)
CSTritt 0:753e269a13b9 11
CSTritt 0:753e269a13b9 12 */
CSTritt 0:753e269a13b9 13 #include "mbed.h"
CSTritt 0:753e269a13b9 14
CSTritt 0:753e269a13b9 15 const int HIGH = 1; // Optional, but makes code more readable.
CSTritt 0:753e269a13b9 16 const int LOW = 0; // Optional, but makes code more readable.
CSTritt 0:753e269a13b9 17
CSTritt 0:753e269a13b9 18 AnalogIn analog_value(A0);
CSTritt 0:753e269a13b9 19
CSTritt 0:753e269a13b9 20 DigitalOut led(LED1);
CSTritt 0:753e269a13b9 21
CSTritt 0:753e269a13b9 22 int main()
CSTritt 0:753e269a13b9 23 {
CSTritt 0:753e269a13b9 24 uint16_t iValue; // Value to be read. Must be unsigned int 16.
CSTritt 0:753e269a13b9 25
CSTritt 0:753e269a13b9 26 printf("\nAnalogIn example\n");
CSTritt 0:753e269a13b9 27
CSTritt 0:753e269a13b9 28 while(true) {
CSTritt 0:753e269a13b9 29 iValue = analog_value.read_u16(); // Read analog value as uint16.
CSTritt 0:753e269a13b9 30 printf("Value = %u\n", iValue); // Unsigned (u) specifier required.
CSTritt 0:753e269a13b9 31 if (iValue > 32768u) { // Activate built-in LED. The u is required.
CSTritt 0:753e269a13b9 32 led = HIGH;
CSTritt 0:753e269a13b9 33 } else {
CSTritt 0:753e269a13b9 34 led = LOW;
CSTritt 0:753e269a13b9 35 }
CSTritt 0:753e269a13b9 36 wait(0.25); // 250 ms
CSTritt 0:753e269a13b9 37 }
CSTritt 0:753e269a13b9 38 }