Hi
I'm trying to connect a development board. based on MCP2200 USB/UART converter to a High Sierra system. However: I do not see any device appearing in /dev/. The same device does connect to a Windows and Linux system, so I do not suspect the hardware. Is teher ny driver to be installed maybe? The manufacturer claims that the chip supprt the cdc/acm protocol, see site: http://ww1.microchip.com/downloads/en/DeviceDoc/MCP2200_MCP2221_CDC_Mac_Readme.txt
Is teher ny driver to be installed maybe?
I’m not actually sure how to parse that sentence, but I think you’re asking whether you need to install a driver. In general, no, standard USB serial devices work via a built-in driver. I’ve used a number of such devices and they just worked, so I’m not sure why this specific one is failing.
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Quinn “The Eskimo!”
Apple Developer Relations, Developer Technical Support, Core OS/Hardware
let myEmail = "eskimo" + "1" + "@apple.com"Thanks Eskimo, indeed my sentence was a bit garbled,sorry about that. This is what I meant to say: "Is there any driver to be installed maybe?" So your answer is 'no', but...... When I connected the device, it did not even appear in the usb-device-tree, as visible in the "About This Mac/System Report/USB" dialog. When I connected another device, also a usb/serial converter, with a different chip, in this case a Prolific one, it did appear in that tree. With your confirmation that the chip is supported by the default kernel-drivers, I concluded that it had to be a hardware problem, and I found out by now: The board I was using happened to have an additional usb-hub on board, which caused the chain of usd-hubs to exceed the max of five. So changed my usb-chain, made sure I had a powered hub in between and TaDa!!
<code>
MCP2200 USB Serial Port Emulator:
Product ID: 0x00df
Vendor ID: 0x04d8 (Microchip Technology Inc.)
Version: 1.01
Serial Number: 0001758295
Speed: Up to 12 Mb/sec
Manufacturer: Microchip Technology Inc.
Location ID: 0x14212000 / 23
Current Available (mA): 500
Current Required (mA): 100
Extra Operating Current (mA): 0
</code>
I have not actually used the connection yet, but am convinced that is is going to work now,
Thanks.