Playback pattern sequences, C/C++ Programming

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. 

Posted Date: 2/22/2013 6:14:20 AM | Location : United States







Related Discussions:- Playback pattern sequences, Assignment Help, Ask Question on Playback pattern sequences, Get Answer, Expert's Help, Playback pattern sequences Discussions

Write discussion on Playback pattern sequences
Your posts are moderated
Related Questions
You must write a program that can both decrypt and encrypt a single word that is entered by the user. The initial choice of encryption and decryption is left up to the user. Addi

: Write a program that prompts the user to enter five digit positive numbers. The program then outputs the digits of the number one digit per line. Eg if the user enters 32456, th

Generate a class node that contains an integer id, a position (x, y)  and a vector of 0 5,  generate a set of  x nodes each with random connectivity n.    Implement an algorith

Develop Online Slot Video Game for Facebook Prepare an online slot video game for a Facebook promotion in order to draw new visits and Increase the number of "likes" of the Face

wap to cheak if a number is palindrom

Normal 0 false false false EN-US X-NONE X-NONE MicrosoftInternetExplorer4

Semaphore is used to synchronize processes. whereas mutex is used to give synchronization among threads running in the similar process.

write a program in c/C++ using nested if statement for calculating the average marks and grades of 5 subjects


Write a program to find the area under the curve y = f(x) between x = a and x = b, integrate y = f(x) between the limits of a and b. The area under a curve between two points can b