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Use the Roadrunner ISC Image Sensor Controller port

This page describes how to configure and use of the ISC port on Roadrunner SOM.

The basic knowledge used to write this article comes from this page:

Hardware used

Omnivision OV7670 camera available on Amazon

Wirings

Signal SAMA5D2 pin Camera pin
ISC_D0 PB26 GND
ISC_D1 PB27 GND
ISC_D2 PB28 GND
ISC_D3 PB29 GND
ISC_D4 PB30 D0
ISC_D5 PB31 D1
ISC_D6 PC0 D2
ISC_D7 PC1 D3
ISC_D8 PC2 D4
ISC_D9 PC3 D5
ISC_D10 PB24 D6
ISC_D11 PB25 D7
ISC_VSYNC PC5 VSYNC OUT Active High Frame Valid; indicates active frame
ISC_HSYNC PC6 HREF OUT Active High: Line/Data Valid; indicates active pixels
ISC_MCK PC7 XCLK INP Master Clock into Sensor
ISC_PCK PC4 PCLK OUT Pixel Clock output from sensor
TWCK1 PD5 SCL I2C Clock
TWD1 PD4 SDA I2C Data
PB11 PB11 RST INP Sensor reset signal, active low
PB12 PB12 PWON INP Power down input, active high
3V VCC
GND GND

Linux driver

Device Drivers  --->
    <*> Multimedia support  ---> 
        [*]   Cameras/video grabbers support
        [*]   Media Controller API   
        [*]   V4L2 sub-device userspace API         
        [*]   V4L platform devices  --->   
            <*>   ATMEL Image Sensor Controller (ISC) support
            <*>   ATMEL Image Sensor Interface (ISI) support 
        I2C Encoders, decoders, sensors and other helper chips  ---> 
            <*> OmniVision OV5640 sensor support  
            <*> OmniVision OV7670 sensor support

Device tree and defconfig

Use the camera from user space

Install ffmpeg:

sudo apt update
sudo apt install -y ffmpeg

Record 5 secs of video:

sudo ffmpeg -y  -r 25 -t 5 -i /dev/video0 out.mp4

Links

Sergio Tanzilli
System designer, webmaster and Acme Systems co-founder
Personal email: tanzilli@acmesystems.it
Webpages: https://www.acmesystems.it - https://www.tanzolab.it
Github repositories: https://github.com/tanzilli and https://github.com/acmesystems
Telegram group dedicated to the Acme Systems boards: https://t.me/acmesystemssrl

Roadrunner technical documentation Buy on-line

Bruna Mandolino