Hello,
I am working on a project where I wanted to display raspberry pi desktop on the 1.5'' NTSC/PAL (Television) TFT display (https://www.adafruit.com/product/910) I got from AdaFruit. I have a pi 4 Model B.
To connect the display to the pi, I also purchased an A/V RCA Cable for Raspberry Pi which turns the output into a full on composite video and audio device. I plugged the yellow end to the raspberry pi and the powered the board up with a 9V power source.
The put displays colour and the little raspberry icon for 2 seconds and then went back to all black afterwards. I am wondering what could be the issue here?
I've also tried to directly plugging the display to the by using the male-to-male converter and the display stays black for the entire time.
I appreciate for any of the help!
NTSC/PAL (Television) TFT Display - 1.5" Diagonal on Raspi 4
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- YC_
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- mikeysklar
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Re: NTSC/PAL (Television) TFT Display - 1.5" Diagonal on Ras
That is a good sign that the Pi logo displayed for a moment.
I think you need to drop the resolution on your Pi to the 1.5" TFT max resolution of 160x240.
Modifying the /boot/config.txt is described here:
https://learn.adafruit.com/using-a-mini ... e-and-test
I think you need to drop the resolution on your Pi to the 1.5" TFT max resolution of 160x240.
Modifying the /boot/config.txt is described here:
https://learn.adafruit.com/using-a-mini ... e-and-test
- YC_
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Re: NTSC/PAL (Television) TFT Display - 1.5" Diagonal on Ras
I figured it out! Under config there's an HDMI/composite option and I have to enable that option!
- YC_
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Re: NTSC/PAL (Television) TFT Display - 1.5" Diagonal on Ras
I got another question. I have set up the screen according to the tutorial and the buffer width and height is 160*240 now. However everything is still very small and what I see on the display is mirrored, so everything is reversed. Any suggestion on how to fix these issues?
This is what I have in the config.txt
# uncomment the following to adjust overscan. Use positive numbers if console
# goes off screen, and negative if there is too much border
overscan_left=-26
overscan_right=-26
overscan_top=-16
overscan_bottom=-16
# uncomment to force a console size. By default it will be display's size minus
# overscan.
framebuffer_width=160
framebuffer_height=240
This is what I have in the config.txt
# uncomment the following to adjust overscan. Use positive numbers if console
# goes off screen, and negative if there is too much border
overscan_left=-26
overscan_right=-26
overscan_top=-16
overscan_bottom=-16
# uncomment to force a console size. By default it will be display's size minus
# overscan.
framebuffer_width=160
framebuffer_height=240
- mikeysklar
- Posts: 13936
- Joined: Mon Aug 01, 2016 8:10 pm
Re: NTSC/PAL (Television) TFT Display - 1.5" Diagonal on Ras
Looking at the datasheet this screen is supposed to support 480 x 240. Can you try that setting?
https://cdn-shop.adafruit.com/datasheet ... 000601.pdf
What settings are you using for composite mode? When I look at the documentation for that it appears there are at least three PAL options if you are using the sdtv_mode value. There is also a sdtv_aspect that might be causing the doubling.
https://www.raspberrypi.com/documentati ... video-mode
https://cdn-shop.adafruit.com/datasheet ... 000601.pdf
What settings are you using for composite mode? When I look at the documentation for that it appears there are at least three PAL options if you are using the sdtv_mode value. There is also a sdtv_aspect that might be causing the doubling.
https://www.raspberrypi.com/documentati ... video-mode
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- YC_
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- Joined: Fri Nov 26, 2021 3:21 pm
Re: NTSC/PAL (Television) TFT Display - 1.5" Diagonal on Ras
Hi,
sorry for the late reply. I am using sdtv_mode=2 (Normal PAL) and I am not seeing a sdtv_aspect variable, so I'd say it's the defaulting value 1 (4:3). I have also changed the pixel width and height to 480 x 240, but it doesn't seem to change anything
Thank you
sorry for the late reply. I am using sdtv_mode=2 (Normal PAL) and I am not seeing a sdtv_aspect variable, so I'd say it's the defaulting value 1 (4:3). I have also changed the pixel width and height to 480 x 240, but it doesn't seem to change anything
Thank you
- mikeysklar
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- Joined: Mon Aug 01, 2016 8:10 pm
Re: NTSC/PAL (Television) TFT Display - 1.5" Diagonal on Ras
The 1.5" TFT is going to be limited to 160x240.
The 2", 2.5" or 3.5" can get you to 320x240.
The 2", 2.5" or 3.5" can get you to 320x240.
- YC_
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Re: NTSC/PAL (Television) TFT Display - 1.5" Diagonal on Ras
Thank you for the reply. But whatever the change I made to the frame buffer_width and height, it doesn't seem to have any impact on the display after reboot. The below picture is the small display result I get.
- mikeysklar
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Re: NTSC/PAL (Television) TFT Display - 1.5" Diagonal on Ras
Since you are running X-windows can you try setting the resolution from graphical interface:
Pi logo start menu --> Preferences --> Screen Configuration --> Resolution
There might not be any options except for 160x240 for this display.
You should be able to connect in via VNC if necessary.
Pi logo start menu --> Preferences --> Screen Configuration --> Resolution
There might not be any options except for 160x240 for this display.
You should be able to connect in via VNC if necessary.
- YC_
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Re: NTSC/PAL (Television) TFT Display - 1.5" Diagonal on Ras
Thank you so much. I think I have to go with VNC. When I connect to the TFT display and change the preference under screen configuration, there's only one resolution option I think that's the lowest resolution the system supports.
- mikeysklar
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Re: NTSC/PAL (Television) TFT Display - 1.5" Diagonal on Ras
The 1.5" TFT will require you to hold 160x240 so that is the resolution you need to work with.
Please be positive and constructive with your questions and comments.