Playback pattern sequences, C/C++ Programming

Assignment Help:

This task involves creating a new class(es) that will allow the system to playback pattern sequences using the Neo  Freerunner  hardware. The first thing to note is that the vibrator is treated similarly to how the phone views LEDs, meaning that the intensity of the vibration is determined by a number from 0 to 255 (brightness). Hardware on the Neo Freerunner can be read or written to by accessing special system files. The 'files' to access this hardware can be found in (these are easy-access symlinks): 

/sys/class/leds/

In this directory you will find several special files  that can  manipulate  its physical functionality (Linux: Device Files). An example of how to "Pulse" the Neo vibrator can be found inside the function SetVibrateNow within open source file:

/devel/qt-extended-4.4.2/devices/neo/src/plugins/phonevendors/neo/vendor_neo.cpp

The sample pattern files provided use the format of specifying the strength (0-255) and duration (milliseconds) of a single 'note' on each line of the file. For example, a file with:

150,1000
0,500

This means that the hardware should activate at a strength of 150 for 1sec, followed by nothing for 0.5secs. In the case of the LEDs, as there are three LEDs - the pattern file will be formatted as follows:


1,0,1,255,1000
1,0,0,255,500
1,1,1,0,1000 or 0,0,0,x,1000 (x can be anything)
1,1,0,255,1000

This means that, blue and red leds activate for 1sec, blue remains on for 0.5sec, no activity for 1sec, followed by purple (blue/orange) led for 1 second.

This module should only exist in PhoneBookDialog and can only be accessed by other classes using signal and slot connections made in PhoneBookDialog. 


Related Discussions:- Playback pattern sequences

Change to palindrome, A palindrome is a string that reads the same from bot...

A palindrome is a string that reads the same from both the ends. Given a string S convert it to a palindrome by doing character replacement. Your task is to convert S to palindrome

Explain multiple inheritance, Multiple Inheritance Multiple inheritance ,...

Multiple Inheritance Multiple inheritance , as the name suggests , is  deriving a class from more than one class . The derived class inherits all the properties of all its base c

C program to demonstrate pointer to string, C program to demonstrate Pointe...

C program to demonstrate Pointer to string: void main() {                 int a;                 char str[]="hello how are you?",*ptr_str;                 ptr_str=&

If statement, who to write max if statements in a program

who to write max if statements in a program

Give a formal expression of the specification, A function REPAT is specifie...

A function REPAT is specified below. Function REPAT(c in Char, i in Int, s in mString) return in mString pre 1 ≤ i ≤ the length of s. post The returned value is a string identic

Simple program of c++ , Simple program of c++: int main() {    i...

Simple program of c++: int main() {    int   bushels;    float dollars, rate;                 cout                 cin >> dollars;                 cout

Member dereferencing operators, M em b e r d e r e f e r e n c ...

M em b e r d e r e f e r e n c i ng o p e r a t o r s: T h e s e op e r a t o r s w i l l b e d i s c u s s e d l a t

How to write an inline class member function, How to write an inline class ...

How to write an inline class member function In addition to global functions, you may request that non-static member functions of a class be inlined.  The normal method of doin

Smuggler, Smugglers are becoming very smart day by day. Now they have devel...

Smugglers are becoming very smart day by day. Now they have developed a new technique of sending their messages from one smuggler to another. In their new technology, they are send

C/c++, Byteland county is very famous for luminous jewels. Luminous jewels ...

Byteland county is very famous for luminous jewels. Luminous jewels are used in making beautiful necklaces. A necklace consists of various luminous jewels of particular colour. Nec

Write Your Message!

Captcha
Free Assignment Quote

Assured A++ Grade

Get guaranteed satisfaction & time on delivery in every assignment order you paid with us! We ensure premium quality solution document along with free turntin report!

All rights reserved! Copyrights ©2019-2020 ExpertsMind IT Educational Pvt Ltd