Solved Can't get Composite to work (Raspberry Pi Zero)

[mima2856]

Hi,

I'm trying to run recalbox on my 3.5'' tft screen (the NTSC/PAL from Adafruit). The screen itself is working correctly (with raspian I get output). However, I dont get any output when using recalbox, the screen stays black.

I used this guide I found in the wiki: https://github.com/recalbox/recalbox-os/wiki/Connect-your-recalbox-to-a-CRT-with-composite-(EN)

According to this guide I removed all hdmi_ entries from /boot/config.txt and added:
sdtv_mode=2
hdmi_ignore_hotplug=1

Further I changed the recalbox.conf to global.videomode=default

After this changes there is only HDMI output during the boot phase, but unfortunately no output on composite

Has anyone advice or suggestions how to proceed?

My current config.txt settings are:

disable_overscan=0
sdtv_mode=2
gpu_mem_256=128
gpu_mem_512=256
gpu_mem_1024=512
temp_limit=65
kernel=zImage
disable_overscan=0
overscan_scale=1
arm_freq=1000
core_freq=250
sdram_freq=450
force_turbo=0
over_voltage=6
over_voltage_sdram=0
gpu_freq=250
sdtv_mode=2
hdmi_ignore_hotplug=1

--

Best regards,
Michael

[tikiandskull]

@mima2856 this is my config.txt, work with my bw 3.5'' composite screen

#hdmi_safe=1

disable_overscan=0

# uncomment to force a specific HDMI mode (this will force VGA)
#hdmi_group=1
#hdmi_mode=1

# comment to get jack audio
#hdmi_drive=2

#config_hdmi_boost=0

# force hdmi while the tv can take time before sending the signal on the hdmi output
#hdmi_force_hotplug=0

# uncomment for composite PAL
sdtv_mode=2

# uncomment for lirc-rpi
#dtoverlay=lirc-rpi

# if you plug your tv at the same time as your rpi and that the rpi switches from the hdmi or give a low resolution because tv had no enough time to initialize it
boot_delay=3

# uncomment if you don't want the rainbow at startup
disable_splash=1

# Overclock
gpu_mem_256=128
gpu_mem_512=256
gpu_mem_1024=512

avoid_safe_mode=1

kernel=zImage

# NOOBS Auto-generated Settings:
arm_freq=1100
core_freq=550
sdram_freq=600
force_turbo=1
over_voltage=8
over_voltage_sdram=6
gpu_freq=250

hdmi_ignore_hotplug=1
framebuffer_width=320
framebuffer_height=240
overscan_left=0
overscan_right=0
overscan_top=0
overscan_bottom=0```

( je ne sais toujours pas mettre du texte dans une balise) :)

[ian57]

mon code

les balise ouvrantes et fermantes sont "```"

[mima2856]

@tikiandskull Hi,

thanks for your config.txt. I tried it - but still no success
Behavior is still the same. Problem seems to be something else.

I plan on reinstalling recalbox, maybe I misconfigured something else.

Wiring should be OK if it works with raspian, am I right?

Best regards,
Michael

I quote some code :-)

[tikiandskull]

@ian57 merci!

[tikiandskull]

@mima2856 sorry...

[mima2856]

Hi,

for the record: I got it working.

I did setup recalbox on the RPi Zero, then I modified the config.txt and recalbox.cfg and now my TFT is working.

What i probably did wrong: I have a RPi3 and a RPI Zero. At first, my recalbox setup was simply taken from the RPi3 and put into the RPI Zero. Maybe that was the problem, I dont know for sure. I thought that the RPi3 and RPi zero are essentially the same hardware, so it wouldnt matter.

Best regards,
Michael

[ian57]

No they are not!!! That's why there are 3 Pi versions of recalbox! P0/1 Pi2 and P3 with different emulators activated. Making a Sd on a Pi3 will not work on a Pi2 or Pi0/1. So, do not suppose... be sure

[mima2856]

@ian57 yes, you are right of course. It did boot though, that's what got me confused
Next time I will read my hardware manuals properly, lol

[danno]

@ian57 is there a list or a files that shows what emulators are active on P0/1 vs Pi2 vs Pi3?

[OyyoDams]

@danno Hi,

1. Please don't post in such an old topic, open a new one
2. Read the wiki... https://github.com/recalbox/recalbox-os/wiki/Board-Compatibility-(EN)
3. I'm closing this topic.