iMX6 OpenRex Camera - Revision history

Voipac-sw: /* Video preview */

2022-02-24T08:48:26Z

Video preview

Voipac at 15:45, 1 April 2021

2021-04-01T15:45:16Z

Voipac at 15:17, 1 April 2021

2021-04-01T15:17:20Z

Voipac: Created page with "Category:iMX6 OpenRex SBC Category:iMX6 OpenRex Peripherals
TOC
This example uses Raspberry Pi Camera Rev 1.3 (build on OV..."

2021-04-01T15:15:03Z

Created page with "Category:iMX6 OpenRex SBC Category:iMX6 OpenRex Peripherals  <div style="float:right">__TOC__</div> This example uses Raspberry Pi Camera Rev 1.3 (build on OV..."

New page

[[Category:iMX6 OpenRex SBC]]
[[Category:iMX6 OpenRex Peripherals]]

<div style="float:right">__TOC__</div>

This example uses Raspberry Pi Camera Rev 1.3 (build on OV5647 MIPI sensor) as a test device for CSI Interface. On this page OV5647 sensor integration, settings and usage on i.MX6 processors are shown.<br /><br />

'''''Note:''''' There is an issue concerning Raspberry Pi 1.3 cameras and its I2C detected. There might be some camera models that does not get identified.

== Device detection ==
=== Kernel 4.1 ===
<syntaxhighlight lang="bash">
...
camera ov5647_mipi is found
...
</syntaxhighlight>

=== Kernel 3.14 ===
<syntaxhighlight lang="bash">
...
camera ov5647_mipi is found
mxc_v4l2_master_attach: ipu(0:0)/csi(1:0)/mipi(1:0) doesn't match
mxc_v4l2_master_attach: ipu0:/csi1 mipi attached ov5647_mipi:mxc_v4l2_cap1
ERROR: v4l2 capture: slave not found!
...
</syntaxhighlight>

== I2C detect ==
CSI connector uses I2C2 to communicate with cameras. OV5647 sensor is located at 0x36 address:
<syntaxhighlight lang="bash">
root@imx6s-openrex:~# i2cdetect -y 1
0 1 2 3 4 5 6 7 8 9 a b c d e f
00: -- -- -- -- -- -- -- -- -- -- -- -- --
10: -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
20: -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
30: -- -- -- -- -- -- UU -- -- -- 3a -- -- -- -- --
40: -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
50: -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
60: -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
70: -- -- -- -- -- -- -- --
</syntaxhighlight>

== GPIO control ==
GPIO pins are controlled by the camera driver and access to these pins is blocked. Power on signal is recognised as GPIO 74, LED GPIO has number 54.<br /><br />

LED located on camera module can be tested by temporarily disabling mipi kernel module and toggling corresponding GPIO pin:
<syntaxhighlight lang="bash">
root@imx6s-openrex:~# modprobe -r ov5647_camera_mipi
root@imx6s-openrex:~# echo 54 > /sys/class/gpio/export
root@imx6s-openrex:~# echo out > /sys/class/gpio/gpio54/direction
root@imx6s-openrex:~# echo 1 > /sys/class/gpio/gpio54/value
root@imx6s-openrex:~# echo 0 > /sys/class/gpio/gpio54/value
root@imx6s-openrex:~# echo 54 > /sys/class/gpio/unexport
root@imx6s-openrex:~# modprobe ov5647_camera_mipi
</syntaxhighlight>

== Modules listing ==
=== Kernel 4.1 ===
<syntaxhighlight lang="bash">
root@imx6-openrex:~# lsmod
Module Size Used by
mxc_v4l2_capture 27624 2
ipu_bg_overlay_sdc 5385 1 mxc_v4l2_capture
ipu_still 2331 1 mxc_v4l2_capture
ipu_prp_enc 5903 1 mxc_v4l2_capture
ipu_csi_enc 3904 1 mxc_v4l2_capture
ipu_fg_overlay_sdc 6130 1 mxc_v4l2_capture
ov5647_camera_mipi_int 30566 0
adv7610_video 6373 0
v4l2_int_device 2872 4 ov5647_camera_mipi_int,adv7610_video,ipu_csi_enc,mxc_v4l2_capture
mxc_dcic 6528 0
</syntaxhighlight>

=== Kernel 3.14 ===
<syntaxhighlight lang="bash">
root@imx6s-openrex:~# lsmod
Module Size Used by
mxc_v4l2_capture 28532 1
ipu_bg_overlay_sdc 5401 1 mxc_v4l2_capture
ipu_still 2528 1 mxc_v4l2_capture
ipu_prp_enc 5943 1 mxc_v4l2_capture
ipu_csi_enc 3863 1 mxc_v4l2_capture
ipu_fg_overlay_sdc 6217 1 mxc_v4l2_capture
ov5647_camera_mipi 30906 0
v4l2_int_device 2930 2 ov5647_camera_mipi,mxc_v4l2_capture
mxc_dcic 6569 0
evbug 1875 0
</syntaxhighlight>

== Resolution setting ==
=== 1280x960 ===
<syntaxhighlight lang="bash">
echo 0 > /sys/bus/i2c/devices/1-0036/ov5647_mode
</syntaxhighlight>

=== 1280x720 ===
<syntaxhighlight lang="bash">
echo 1 > /sys/bus/i2c/devices/1-0036/ov5647_mode
</syntaxhighlight>

=== 1920x1080 ===
<syntaxhighlight lang="bash">
echo 2 > /sys/bus/i2c/devices/1-0036/ov5647_mode
</syntaxhighlight>

=== 640x480 ===
<syntaxhighlight lang="bash">
echo 3 > /sys/bus/i2c/devices/1-0036/ov5647_mode
</syntaxhighlight>

=== 1024x768 (default) ===
<syntaxhighlight lang="bash">
echo 4 > /sys/bus/i2c/devices/1-0036/ov5647_mode
</syntaxhighlight>

=== 960x720 ===
<syntaxhighlight lang="bash">
echo 5 > /sys/bus/i2c/devices/1-0036/ov5647_mode
</syntaxhighlight>

=== 640x480 (narrow angle of view) ===
<syntaxhighlight lang="bash">
echo 6 > /sys/bus/i2c/devices/1-0036/ov5647_mode
</syntaxhighlight>

== Gstreamer ==
=== Capture single JPEG picture ===
<syntaxhighlight lang="bash">
echo 2 > /sys/bus/i2c/devices/1-0036/ov5647_mode
gst-launch-1.0 v4l2src device="/dev/video1" num-buffers=1 ! video/x-bayer,width=1920,height=1080,framerate=30/1 ! bayer2rgb ! videoconvert ! jpegenc ! filesink location=sample_1920_1080.jpeg
</syntaxhighlight>

=== Video preview ===
<syntaxhighlight lang="bash">
echo 2 > /sys/bus/i2c/devices/1-0036/ov5647_mode
gst-launch-1.0 v4l2src device="/dev/video1" ! video/x-bayer,width=1920,height=1080,framerate=30/1 ! queue ! bayer2rgb ! videoconvert ! fbdevsin
</syntaxhighlight>

<syntaxhighlight lang="bash">
echo 3 > /sys/bus/i2c/devices/1-0036/ov5647_mode
gst-launch-1.0 v4l2src device="/dev/video1" ! video/x-bayer,width=640,height=480,framerate=15/1 ! bayer2rgb ! videoconvert ! fbdevsink
</syntaxhighlight>

@@ Line 134: / Line 134: @@
 <syntaxhighlight lang="bash">
 echo 2 > /sys/bus/i2c/devices/1-0036/ov5647_mode
-gst-launch-1.0 v4l2src device="/dev/video1" ! video/x-bayer,width=1920,height=1080,framerate=30/1 ! queue ! bayer2rgb ! videoconvert ! fbdevsin
+gst-launch-1.0 v4l2src device="/dev/video1" ! video/x-bayer,width=1920,height=1080,framerate=30/1 ! queue ! bayer2rgb ! videoconvert ! fbdevsink
 </syntaxhighlight>

@@ Line 42: / Line 42: @@
 == GPIO control ==
-GPIO pins are controlled by the camera driver and access to these pins is blocked. Power on signal is recognised as GPIO 74, LED GPIO has number 54.<br /><br />
+GPIO pins are controlled by the camera driver and access to these pins is blocked. Power on signal is recognised as GPIO 198, LED GPIO has number 199.<br /><br />
 LED located on camera module can be tested by temporarily disabling mipi kernel module and toggling corresponding GPIO pin:
 <syntaxhighlight lang="bash">
 root@imx6s-openrex:~# modprobe -r ov5647_camera_mipi
-root@imx6s-openrex:~# echo 54 > /sys/class/gpio/export
+root@imx6s-openrex:~# echo 199 > /sys/class/gpio/export
-root@imx6s-openrex:~# echo out > /sys/class/gpio/gpio54/direction
+root@imx6s-openrex:~# echo out > /sys/class/gpio/gpio199/direction
-root@imx6s-openrex:~# echo 1 > /sys/class/gpio/gpio54/value
+root@imx6s-openrex:~# echo 1 > /sys/class/gpio/gpio199/value
-root@imx6s-openrex:~# echo 0 > /sys/class/gpio/gpio54/value
+root@imx6s-openrex:~# echo 0 > /sys/class/gpio/gpio199/value
-root@imx6s-openrex:~# echo 54 > /sys/class/gpio/unexport
+root@imx6s-openrex:~# echo 199 > /sys/class/gpio/unexport
 root@imx6s-openrex:~# modprobe ov5647_camera_mipi
 </syntaxhighlight>

@@ Line 29: / Line 29: @@
 CSI connector uses I2C2 to communicate with cameras. OV5647 sensor is located at 0x36 address:
 <syntaxhighlight lang="bash">
-root@imx6s-openrex:~# i2cdetect -y 1
+root@imx6-openrex:~# i2cdetect -y 1
   1  2  3  4  5  6  7  8  9  a  b  c  d  e  f
-:          -- -- -- -- -- -- -- -- -- -- -- -- --
+:          -- -- -- -- -- -- -- UU -- -- -- -- --
 : -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
 : -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-: -- -- -- -- -- -- UU -- -- -- 3a -- -- -- -- --
+: -- -- -- -- -- -- UU -- -- -- -- -- -- -- -- --
-: -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
+: UU -- -- -- -- -- -- -- UU -- -- -- -- -- -- --
-: -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
+: UU -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
 : -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
 : -- -- -- -- -- -- -- --
 </syntaxhighlight>

iMX6 OpenRex Camera - Revision history

Voipac-sw: /* Video preview */

Voipac at 15:45, 1 April 2021

Voipac at 15:17, 1 April 2021

Voipac: Created page with "Category:iMX6 OpenRex SBC Category:iMX6 OpenRex Peripherals __TOC__ This example uses Raspberry Pi Camera Rev 1.3 (build on OV..."

Voipac: Created page with "Category:iMX6 OpenRex SBC Category:iMX6 OpenRex Peripherals
TOC
This example uses Raspberry Pi Camera Rev 1.3 (build on OV..."