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Hi, i have a problem with de CM4 to CM3 adaptor .
I have a CM3 evaluation board with CM3 -> HDMI works ok.
CM3 evaluation board with a CM4 to CM3 adaptor and a CM4 then i have only 3 seconds HDMI signal when CM4 boot. ( Raspberry logo ) ( CM4 is running only no HDMI signal)
The Raspberry PI logo shows that it can be displayed. There should be a configuration problem.
CM3 has only one video output interface, while Raspberry PI CM4 has two output interfaces. There should be a problem with the configuration of the system desktop display. Please check the configuration.
Or try reinstalling with the official system to test it out.
Hi, trying to connect the official 7-inch LCD. The LCD is set up using I2C on pin3 and pin5 on the CM3, but you have GPIO0 and GPIO1 connected to these pins. According to the CM4 datasheet, there are no GPIO0 nor GPIO1... 2 Questions: 1) Is the I2C connected? If yes, where? 2) To which pins on the CM4 are pin3 and pin5 on the SODIMM connector connected to?
I am having trouble using a USB port tied to pins 165 and 167 on the CM3 connector. Does anyone know if pins 165 and 167 are directly connected to CM4 pins 103 and 105 (USB N & P)? Also, I noticed that pin 168 on the CM3 connector does not mention a USB_OTG_ID pin. Does this board not support mulitple USB ports? Thank you.
The USB interface is disabled to save power by default on the CM4 . To enable it you need to add dtoverlay=dwc2,dr_mode=host to the config.txt file, detail to refer to CM4 datasheet. please refer CM4 Stick
Lisa, I had already added that line to the config.txt. My CM4 seemed to work fine with a CM4 I/O board USB connection, but I am not getting any USB signal from the CM4 to CM3 adapter on a CM3 board. The boot light is flashing, so it seems to be loading the image off of the SD card, but I am not getting USB signal. Is there a full pinout diagram for the CM4 to CM3 adapter that shows the CM4 connections? Thank you.
dtoverlay=dwc2,dr_mode=host was necessary to make the USB bus work on the CM4 IO Board. I am having problems with the USB bus through the converter with a VBAT of 3.3V for the converter. The USB breakout is getting 5V and was working properly with a CM3+. Any ideas on troubleshooting?
The CM4 was not seated all the way in the converter. We also needed to use a USB hub to reduce the strain on the 3.3 V bus on our custom board but then it seemed to work.
We are using both MIPI CSI Cameras (0 and 1) on the actual CM3 design so two I2C interfaces needs to be used.
We found GPIO0 and GPIO (I2C0) for Camera 0 are connected from CM4 to CM3 and Camera 0 works OK.
Camera 1 is NOT working, so please let me know if GPIO44 and GPIO45 (I2C) for Camera 1 are connected/mapped from CM4 to CM3.
Waiting for your answer immediately.
Hello,Could you please provide us with some test pictures and videos for reference? please send to support@geekworm.com ;and please tell us your order number,Thanks!
This may be because the inductance of the power supply you are using produces a common frequency. We recommend that you replace a charger. We have responded to your question via email, please confirm the email.thanks
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