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Need help with running camera application on Logi-bone
I bought an OV7725 camera from e-bay and followed the wiring to the Logi-bone using the schematic in the PMOD Camera adapter drawing Rev R1.0. I could not get the video to stream.
I did notice that in the logi-apps/imgproc_app folder, the bit file is logibone_camera_R1_7670.bit. When I run the make_demo.sh to start the streaming, it does ask for the option to specify the camera type. So even specifying the camera type as 7725, it will still be loading the bit file corresponding to the 7670 camera.
I am wondering if this is realted to my problem.
My other question on that same schematic, where is the T1 pin connected to FSIN on the OV7725 CAM header going to? The OV7725 CAM HEADER also does not show a connection to the RSTB pin on the camera but I see that Pin 1 on PMOD1 is connected to RST line, same as Pin 7 on PMOD1 and PWD DWN on the OV7725 CAM Header . So I am confused why this is so in the schematic. Isnt' PWR DWN active HIGH while Reset is Active Low so they should not be connected to one another?
I have a Logi-Bone R1.5.1. Any help would be greatly appreciated.
I did notice that in the logi-apps/imgproc_app folder, the bit file is logibone_camera_R1_7670.bit. When I run the make_demo.sh to start the streaming, it does ask for the option to specify the camera type. So even specifying the camera type as 7725, it will still be loading the bit file corresponding to the 7670 camera.
I am wondering if this is realted to my problem.
My other question on that same schematic, where is the T1 pin connected to FSIN on the OV7725 CAM header going to? The OV7725 CAM HEADER also does not show a connection to the RSTB pin on the camera but I see that Pin 1 on PMOD1 is connected to RST line, same as Pin 7 on PMOD1 and PWD DWN on the OV7725 CAM Header . So I am confused why this is so in the schematic. Isnt' PWR DWN active HIGH while Reset is Active Low so they should not be connected to one another?
I have a Logi-Bone R1.5.1. Any help would be greatly appreciated.
Comments
The rst line has to be controlled in a different way if you work with a ov7670 or ov7725. This is why the project has to be rebuild for a ov7725.
in ov7670
RESET = 0 - Normal mode
1 - Reset mode
in ov7725
RSTB - system reset input , active low
which I interpret as
0 - Reset
1 - Normal mode
So they are reversed?
I attached snapshots from the datasheets that I got. I am surprised that they have to change the polarity and even the names.
for all : yuv_register_rom use entity work.yuv_register_rom(ov7725_qvga);
and comment the one related to ov7670.
I need to order a new ov7725 as i cannot get my hand on the module i used to perform the tests ... Do you have a ov7670 module that you can use just to make sure everything else is working fine ?