{"id":3616,"date":"2013-11-25T22:24:16","date_gmt":"2013-11-26T03:24:16","guid":{"rendered":"https:\/\/teach.alimomeni.net\/2013fall2\/?p=3616"},"modified":"2013-12-09T20:08:37","modified_gmt":"2013-12-10T01:08:37","slug":"final-project-milestone-3-ding-xu","status":"publish","type":"post","link":"https:\/\/teach.alimomeni.net\/2013fall2\/?p=3616","title":{"rendered":"Final Project Milestone 3 \u2013 Ding Xu"},"content":{"rendered":"

1. GPIO control board soldering<\/p>\n

In order to use GPIO of RPI for digital signal control, I built a control protoboard \u00a0with two switches and two push buttons connecting a pull-up\/pull-down registers respectively. A female header was used to connect the GPIO of RPI to get the digital signal.<\/p>\n

In RPI, I used the library WiringPi for GPIO signal reading. After compiling this library and include the header files, three easy steps are used to read the data from digital pins: (1).\u00a0wiringPiSetup() (2). set up pinmode: PinMode(GPIOX,INPUT) and (3).\u00a0digitalRead(GPIOX) or\u00a0digitalWrite(GPIOX)<\/p>\n

\"photo_7(1)\"<\/a><\/p>\n

 <\/p>\n

2. software design<\/p>\n

In openframeworks, I used \u00a0the library Sndfile for recording and\u00a0ofSoundPlayer for sound output. There are two modes: capture and play. Users are expected to record as many as sounds in their lives and take an image each time recording a sound. Then in the play mode, the camera will capture a surrounding image and the sound tracks of similar images will be played.\u00a0\u00a0The software workflow is as follows:<\/p>\n

Capture:
\n\"\"
\nPlay:
\n\"\"<\/p>\n

\"code\"<\/a><\/p>\n

3. system combination<\/p>\n

Connecting the sound input\/output device, RPI, singal control board and camera, the system is as follows:<\/p>\n

\"photo_31\"<\/a><\/p>\n

\"photo30\"<\/a><\/p>\n