Hi @florentw , I hope you can help me with some queries, I am trying to configure your example of adv7511 with the zc702 for my ac701, but I don´t understand some configs, my board has this specs
your config:
step 22:
register 0x18 : Why do you convert YCbCr 4:2:2 to RGB and how did you choose that config?
register 0x55 : Why do you set the AVI info frame with an RGB output when in step 23 register 0x16 you set YCbCr 4:4:4?
register 0x56 : Why do you set the AVI info frame with a 16:9 ratio when in the block design the VTC IP is set to 800x600(4:3)?
step 23:
register 0x16 : Why do you set a YCbCr 4:4:4 output?
my config:
step 22:
register 0x18: set to 0x00 (no CSC), this forum recommends to disable CSC when you have a YCbCr 4:4:4 input
register 0x55: not programmed (I think I could avoid this because in the quick start guide they are not configured)
register 0x56: not programmed (I think I could avoid this because in the quick start guide they are not configured)
register 0xAF: changed to HDMI input because I disabled the YCbCr to RGB conversion in the register 0x18
step 23:
register 0x15: changed to 0x00 to set YCbCr 4:4:4 input
register 0x16 and register 0x48: changed to 0x00 (datasheet says it is not necessary to config them when set 0x15 to 0x00)
from video series 21 I changed this config:
// Set Color Space to YUV422 //XV_tpg_Set_colorFormat(&tpg_inst, 0x02); //to XV_tpg_Set_colorFormat(&tpg_inst, 0x01);
because is the correct configuration if we want the TPG IP creates a YCbCr 4:4:4 output
my monitor is this: this
and I have "no input detected" message in the monitor, what could be wrong?
PD: I am able to detect the monitor HPD
thanks
1 Solution
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Hi @jg_spitfire
This is quite a long time I wrote this article so I cannot remember exactly but most of the settings are coming from the Quick Start Guide from the ADV7511 programmer guide:
So I kept most of the settings as default, it was working for my use case. I guess it is more likely to have a monitor which supports RGB than YCbCr so it might be good to start with RGB output (so set in the infoframe).
On the ZC702, you have a YCbCr422 input so you have to first convert to YCbCr444 (0x16) then convert to RGB (0x18). Now let's look at your config:
my config:
step 22:
register 0x18: set to 0x00 (no CSC), this forum recommends to disable CSC when you have a YCbCr 4:4:4 input
Florent - This sounds right
register 0x55: not programmed (I think I could avoid this because in the quick start guide they are not configured)
register 0x56: not programmed (I think I could avoid this because in the quick start guide they are not configured)
Florent - If you are setting to HDMI as below, I guess you will need to set the infoframes correctly, at least for the color space you are sending
register 0xAF: changed to HDMI input because I disabled the YCbCr to RGB conversion in the register 0x18
Florent - Ok, but you need to set the infoframes so the sink know what it receives
step 23:
register 0x15: changed to 0x00 to set YCbCr 4:4:4 input
register 0x16 and register 0x48: changed to 0x00 (datasheet says it is not necessary to config them when set 0x15 to 0x00)
from video series 21 I changed this config:
// Set Color Space to YUV422 //XV_tpg_Set_colorFormat(&tpg_inst, 0x02); //to XV_tpg_Set_colorFormat(&tpg_inst, 0x01);because is the correct configuration if we want the TPG IP creates a YCbCr 4:4:4 output
my monitor is this: this
and I have "no input detected" message in the monitor, what could be wrong?
PD: I am able to detect the monitor HPD
thanks
The first thing to debug would be to make sure you have video signals going out of your FPGA. I would recommend adding an ILA to the debug signals of the AXI4-Stream to video out (underflow, overflow, and status (and potentially tvalid and tready)). Then once you have this first step working you can look at the ADV7511 configuration.