https://github.com/iwatake2222/digitalcamera_raspberrypi
A project to create a digital camera with Raspberry Pi in Linux standard way such as ioctl
https://github.com/iwatake2222/digitalcamera_raspberrypi
cpp devicedriver raspberrypi
Last synced: 6 months ago
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A project to create a digital camera with Raspberry Pi in Linux standard way such as ioctl
- Host: GitHub
- URL: https://github.com/iwatake2222/digitalcamera_raspberrypi
- Owner: iwatake2222
- Created: 2017-12-01T14:30:02.000Z (over 8 years ago)
- Default Branch: master
- Last Pushed: 2017-12-04T19:31:07.000Z (over 8 years ago)
- Last Synced: 2025-06-11T14:43:41.496Z (10 months ago)
- Topics: cpp, devicedriver, raspberrypi
- Language: C++
- Homepage:
- Size: 516 KB
- Stars: 13
- Watchers: 2
- Forks: 6
- Open Issues: 0
-
Metadata Files:
- Readme: README.md
Awesome Lists containing this project
README
# Digital Camera with Raspberry Pi in Linux Standard Way
This is a Raspberry Pi Project to create a digital camere in Linux standard way.
Device files and related system calls (open/write/ioctl/select) are used to access devices instead of using external libraries or OpenCV. To access a camera from C++ userland, I use Video 4 Linux Two (V4L2) API.
[Link to Youtube Video](https://youtu.be/xP2iDa2bzRc)
## Specs
- Liveview (around 20fps)
- Still capture (320 x 240 JPEG file)
- Playback (JPEG file)
## Devices
- Raspberry Pi Zero W
- can be work on Pi2/3
- OS: 2017-09-07-raspbian-stretch-lite
- 2.8 inch Display (LCD) Module
- 320 x 240
- ILI9341 SPI interface
- Touch Panel (TP)
- TSC2046 SPI interface (ADS7846 compatible)
- Camera
- Raspberry Pi Camera V2
## Overview
Note: LCD(spidev0.0) and TP(spidev0.1) share SCK/MISO/MOSI.
### Software Modules
- App
- Application main class
- treats user input from TP module, and manages mode (liveview/playback)
- creates/deletes an appropreate control class (CameraCtrl and PlaybackCtrl are ready so far)
- CameraCtrl
- A class to control liveview and capture
- PlaybackCtrl
- A class to control playback
- uses libjpeg
- DdCamera
- A class to access camera module using video device file (v4l2)
- DdIli9341Spi
- A class to access LCD using SPI and GPIO device files
- DdTpTsc2046Spi
- A class to access Touch Panel using SPI and GPIO device files
### Hardware Connection
- LCD (SPI0.1 (/dev/spidev0.0))
- LCD_SCLK: SPI0_SCLK
- LCD_MOSI: SPI0_MOSI
- LCD_MISO: SPI0_MISO
- LCD_CS: SPI0_CE0_N
- DC: GPIO 26 (/sys/class/gpio/gpio26)
- VDD, LED, RESET: 3.3V
- GND: GND
- TP (SPI0.1 (/dev/spidev0.1))
- TP_SCLK: SPI0_SCLK
- TP_MOSI: SPI0_MOSI
- TP_MISO: SPI0_MISO
- TP_CS: SPI0_CE1_N
- IRQ = GPIO 19 (/sys/class/gpio/gpio19)
- Camera (/dev/video0)
- CSI port
## How to run
- Enable Camera and SPI from `sudo raspi-config`
- If you want to just run the application
- `sudo apt-get install libjpeg-dev`
- `make`
- `sudo modprobe bcm2835-v4l2`
- `./a.out`
- If you want the application to start automatically
- `sh ./install.sh` to install, which does:
- build the project
- install libjpeg
- setup cron for auto start
- reboot by `sudo reboot yes`
### how to control
- Photo Capture: Tap around the center during liveview mode
- Mode change: Tap any corner or edge
- Playback next picture: Tap around the center during playback mode
## Note for debug
```
sudo modprobe bcm2835-v4l2
v4l2-ctl -d /dev/video0 --list-formats-ext
```