UP4000 40-pin UART in Windows

iwan_nadapdap

Hi all,
New comer here, and I want to use the UP4000 to replace Raspberry Pi and use Windows OS.
The COM1, the serial port in 40-pin doesn't work.
I've searched the forum and I cannot find a working solution. I tried this Python code, but it doesn't work. https://forum.up-community.org/discussion/4774/uart-port-works-on-windows-10-using-minicom-device-monitoring-studio-etc-but-not-on-putty

I've also tried additional USB to serial port module, recognize as COM7 and it works well. I can received and send data.

I understand that there's a CPLD (Altara/Intel) that controls the HAT connector.
Is there any additional step that I need to do to make this work?

Cheers,
Iwan

HarryChiu

Hi Sir

Have you installed Pinctrl??
Please reference this website.
https://github.com/up-board/up-community/wiki/40Pin-Header

Best Regards,
Harry Chiu

SmedlyTonker

I'm also having problems on my UP4000 with the 'COM1:' on the 40 pin HAT connector (CN1). I have installed the pin control (i.e. UpFrameworkSetup-240910).

This is the O/S I'm using:

Connecting these pins on the HAT connector to a to a TTL Converter Module COM Serial Port Board MAX3232 with a serial loopback.

TTL Converter Module:

Here are the wire colors in the above picture and how they are connected to the HAT connector (CN1)

Thanks for the help in advance,
Marc

SmedlyTonker

The built in COM ports on the UP4000 board are a little strange - not sure why

Example1:

UP4000 COM port

Normal COM port

Example2:
Several serial terminal software programs fail to recognize the ports. Putty can see the ports but reports Error 31 upon trying to open COM1. I have had luck with Tera Term opening the port, but can't TX/RX anything.

SmedlyTonker

I built the MinComm example that AAEON posted. Think this example was originally from Microsoft.

MinComm does not detect the serial ports on the UP4000