I am using CyUSBSerial_SDK_Linux on Raspberry Pi to control a projector that uses Cypress usb-to-spi chip(CY7C65215), I wrote a c program for communicating with the device. Everything was working fine on Raspberry Pi 3 running Linux (raspbian buster), however now we just got the Raspberry Pi 4 also running Linux (raspbian buster), but the problem is on the Pi 4 I am getting
CY_ERROR_DRIVER_OPEN_FAILED when calling CyOpen()
Can you please help?
Thanks a lot.
Please check the VID and PID of the device that you are trying to communicate and the device number that is associated with the respective device.
Also please try if the testUtility from the SDK works fine.