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My system and setup:
Ubuntu 18.04, USB 2.0. Device is a Commell MPX24794S card using a Cypress CY8C24794. The cyusb_linux_1.0.4 package was installed according to the instructions in the README file. The active VID and PID was obtained from the command lsusb as VID = cece and PID = 7941. The /etc/cyusb.conf file and the /etc/udev/rules.d/88-cyusb.rules file were modified according to other discussions found here.
cyusb.conf changed to have cece 7941 Commell MPX24794S
88-cyusb.rules changed to have ATTR{idVendor}=="cece" instead of ATTR{idVendor}=="04b4"
Results and observations:
trying to run cyusb_linux gives 2 error messages: Error in opening device and Error opening library.
Commell documentation claims that the PID is 7940. When the value is changes to this cyusb_linux loads but produces a command line response of No device found and there is no device listed in the running program.
cyusb_linux will also run with no device found if the original forms of cyusb.conf and 88-cyusb.rules are used.
Using what appears to be the correct information according to lsusb gives the most problems.
Please advise as to the next step. Thank you.
Solved! Go to Solution.
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Hello,
Can you please use the latest linux SDK 1.0.5 from the FX3 SDK: https://www.cypress.com/documentation/software-and-drivers/ez-usb-fx3-software-development-kit
Do let me know if you are getting the same errors after using the latest SDK.
Thanks,
Yatheesh
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Hello,
Can you please use the latest linux SDK 1.0.5 from the FX3 SDK: https://www.cypress.com/documentation/software-and-drivers/ez-usb-fx3-software-development-kit
Do let me know if you are getting the same errors after using the latest SDK.
Thanks,
Yatheesh
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Yes this has solved the issue. cyusb_linux now correctly loads and finds the device using the the VID and PID found by using lsusb in linux. Thank you.