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Update script to control gain and exposure

This commit is contained in:
dchvs 2021-04-05 00:22:44 -06:00
parent 71bc9b31dd
commit 7d7bad60d3
2 changed files with 4 additions and 20 deletions
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18
README.md
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@ -102,23 +102,7 @@ The AE controls realays in the feedback provided by the Driver's camera sensor t
and the custom DTSIs with the sensor parameters definitions. and the custom DTSIs with the sensor parameters definitions.
As the AE has interdependency with the digital gain. This gain it's and operation on the Driver, and follows this setup: As the AE has interdependency with the digital gain. This gain it's and operation on the Driver, and follows this setup:
```bash MT9M021 sensor datasheet:
/*
* Digital gain equation:
*
* RANGE: 1x, 7.97x
* STEPS: 1/32
*
* SCALE FACTOR = 3
*
* min_gain_val = 102
* max_gain_val = 160
* gain_factor = 3
*
* gain accepts mapping to range 32 - 53
*/
```
MT9M021 sensor datasheet:
* <a href="https://files.niemo.de/aptina_pdfs/MT9M021-M031_Developer_Guide.pdf">MT9M021 Developer Guide</a> * <a href="https://files.niemo.de/aptina_pdfs/MT9M021-M031_Developer_Guide.pdf">MT9M021 Developer Guide</a>

6
script_to_control_gain_exposure.sh
View File

@ -5,7 +5,7 @@ initial_exposure_time=0
while true; do sleep 0.5; while true; do sleep 0.5;
# Read center camera controls # Read center camera controls
echo `v4l2-ctl -d /dev/video1 --get-ctrl=gain --get-ctrl=exposure` > controls echo `v4l2-ctl -d /dev/video0 --get-ctrl=gain --get-ctrl=exposure` > controls
awk '{print $2}' controls > get_control awk '{print $2}' controls > get_control
actual_gain=`cat get_control` actual_gain=`cat get_control`
awk '{print $4}' controls > get_control awk '{print $4}' controls > get_control
@ -18,10 +18,10 @@ while true; do sleep 0.5;
rm controls get_control rm controls get_control
# Set R/L camera controls manually # Set R/L camera controls manually
if [ $actual_gain -ne $initial_gain ]; then if [ $actual_gain -ne $initial_gain ]; then
v4l2-ctl -d /dev/video0 --set-ctrl=gain=$actual_gain v4l2-ctl -d /dev/video1 --set-ctrl=gain=$actual_gain
fi fi
if [ $actual_exposure_time -ne $initial_exposure_time ]; then if [ $actual_exposure_time -ne $initial_exposure_time ]; then
v4l2-ctl -d /dev/video0 --set-ctrl=exposure=$actual_exposure_time v4l2-ctl -d /dev/video1 --set-ctrl=exposure=$actual_exposure_time
fi fi
# Define new initial value # Define new initial value
initial_gain=$actual_gain initial_gain=$actual_gain