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FT121 USB connection

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guoweiran:
Hi,

 I'm using a pcb which is used to convert usb into spi with a FT121 on it. When I plug the pcb's usb interfacing into PC, it couldn't be identified. I have downloaded and run the "CDM21228_setup.exe", "FT12x-CDC" and installed the "ft12x.inf", and it doesn't work.
 After I installed the "ft12x.inf", "FT12x Evaluation Platform(COM3)" with a yellow exclamation mark appeared in the device manager's "port", saying "The device could not be started. (Code 10)". When I unplug the pcb, the "FT12x Evaluation Platform(COM3)" will still stay there.

 What should I do or download to get the pcb identified? And which software is used to configure it? It seems that FT_Prog doesn't support the FT121 chip.

Best regards.

FTDI Community:
Hello,

Thanks for your post.

Please contact support1@ftdichip.com where we can assist you further.

Regards,
FTDI Community

guoweiran:
Thanks, I have sent it,Waiting for your reply.

FTDI Community Admin:
Hello,

Sorry but we have not received your email, can you please check and resend?

Regards,
FTDI Community

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