upm  1.3.0
Sensor/Actuator repository for libmraa (v1.7.0)
 All Data Structures Namespaces Files Functions Variables Typedefs Enumerations Enumerator Macros Groups Pages
Public Member Functions
HT9170 Class Reference

API for the HT9170 DTMF Decoder. More...

Detailed Description

This driver was developed using the DTMF (Dual-Tone Multi-Frequency) Shield by Seeed Studio*. It can decode DTMF signals presented at its audio input. It does not generate DTMF signals.

// Instantiate a DTMF decoder
upm::HT9170* dtmf = new upm::HT9170(12, 11, 10, 9, 8);
// Now we just spin in a loop, sleeping every 100ms, checking to see
// if a digit is available. If so, we decode and print the digit,
// and continue looping.
if (dtmf->digitReady())
cout << "Got DTMF code: " << dtmf->decodeDigit() << endl;
// now spin until digitReady() goes false again
while (dtmf->digitReady())

Public Member Functions

 HT9170 (int dr, int o1, int o2, int o3, int o4)
 ~HT9170 ()
bool digitReady ()
char decodeDigit ()

Constructor & Destructor Documentation

HT9170 ( int  dr,
int  o1,
int  o2,
int  o3,
int  o4 

HT9170 constructor

drData ready pin
o1Digital pin for data output 1
o2Digital pin for data output 2
o3Digital pin for data output 3
o4Digital pin for data output 4
~HT9170 ( )

HT9170 destructor

Member Function Documentation

bool digitReady ( )

Checks to see if a DTMF number is ready to be read

True if there is a digit available to decode
char decodeDigit ( )

Decodes a digit and returns it

The documentation for this class was generated from the following files: