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- #Cp210x usb to uart bridge not working how to#
- #Cp210x usb to uart bridge not working install#
- #Cp210x usb to uart bridge not working serial#
The driver itself only works if USB tells the driver there is a device it might be interested in, and then the driver takes ownership. What do you see as you plug in the USB end? For a different chipset, you may also see an alternative name when udev renames the device.
#Cp210x usb to uart bridge not working serial#
So for example, if you monitor “dmesg -follow” on the host PC, and then plug in the serial UART, you may see a note about “/dev/ttyUSB0” (if it is the first such device). The end of the communications, where the USB is plugged in, will name any device as the device connects. However, the udev naming system may detect certain manufacturer’s devices or chipsets, and choose to rename the UART. Some description of how drivers work for this may help.Ī driver for a regular serial UART over USB bridge would normally create a file name of the format “/dev/ttyUSB#”, where number is anything from 0 and up. The above yielded me CONFIG_USB_SERIAL_CP210X=mīut, i am not able to find the ttyUSB0 or any driver for the cp210x under usb-devices cmd.
#Cp210x usb to uart bridge not working how to#
can you explain how to load the cp210x driver. What do you see from: find /lib/modules/$(uname -r) -name '*cp210*' A module from 4.4.38-tegra is very likely to fail when used with 4.9.140-tegra. A module from a different “uname -r” may or may not work (depending on several issues), and it is always recommended that if you build a new kernel which has a new “uname -r” that you rebuild all modules from scratch. If a different kernel is loaded, then the modules must also be installed for the new kernel. Modules are searched for at “/lib/modules/$(uname -r)/”. If this is “=m”, then your thought that the kernel version may be the issue is probably correct. The “=m” could still fail if the module is not being loaded. If this says “=y” or “=m”, then you have support for that particular UART. What do you see from: zcat /proc/config.gz | grep CP210 If this works you know the port is working at those settings. If you wire TX to its own RX (and optionally CTS to its own RTS), then you have loopback.
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Let’s say your system has ttyUSB0, and you use gtkterm as above to talk to ttyUSB0. The result would be the serial terminal seeing echo of what you type if it works, or nothing if it fails. If you wish to test a port you can use loopback to have the port talk to itself. Note that if two ports are using different settings, then you will either get no output or output will be corrupt. Optionally, if hardware flow control is used (not used in serial console, but perhaps used for your app):.If you use this on a system with ttyUSB0 as the port, and if the port is set to 115200 8N1: gtkterm -b 8 -t 1 -s 115200 -p /dev/ttyUSB0
#Cp210x usb to uart bridge not working install#
I’ll recommend testing first with gtkterm since it is purely a serial console: sudo apt-get install gtkterm If modem init strings are being sent there is no telling what the result would be. “Not connected” could be referring to a telephone PPP or SLIP connection and not to the UART. Those modems were not only serial UARTs, they also had “AT” command sets…short commands which configured the modem itself and not just the UART.
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Realize that minicom came from a day when people used telephone modems most of the time.