Hello,
I working with Python 1300 reference design with an HDMI output. I am currently using 1280*1024p resolution but I want to move to 1280*720.
In order to do that, I change settings of my different IP blocs, added axi lite ctrl for potential reprogrammation, change the Pixel frequency to 74.25MHz and the following timing and register in the Onsemi C function:
in: onsemi_vita_sensor_initialize:
Xuint32 h_active = 1280;
Xuint32 h_fporch = 72
Xuint32 h_syncwidth = 80
Xuint32 h_bporch = 216
Xuint32 v_active = 720;
Xuint32 v_fporch = 3
Xuint32 v_syncwidth = 5
Xuint32 v_bporch = 22
in: vita_spi_seq4:
{ 256, 0xFFFF, 0x9F00}, // //Xst/Xend
{ 257, 0xFFFF, 0x000}, // Ystart
{ 258, 0xFFFF, 0x2CF},//Yend
{ 195, 0xFFFF, 0x01}, //ROI active
So from my understanding:
Register for vita_spi_seq4 control the data transmission of the image from the sensor to the IP setting the right ROI/Resolution. All other communication parameters stay as they were in 1280*1024.
Sync timing change set timing for communication in 1280*720 with the new pixel frequency of 74.25Hz (instead of 108MHz previously).
I put the video timing controller in 720p and I get an output "image" but it is fixed in time and looks like a pink piece of fabric.
Any input on how is the IP working or what I could be missing?
Does the Avnet block support different resolution providing that correct settings have been set into the PS part? Or does it have some IP bug limitation?
Has anyone tested at different rame rate/resolution?
Thanks for your support.
Br,
Ben
Br,
Ben
