Give higher priority to USB PCDC with RA8T1

Question

Hello, 
 
 I am working for project by configuring the device in usb pcdc (USBX), I noticed when making the thread using the usb device stack in a higher priority (less then 15), I am not able to detect the serial port in my host, this is also noticed with your provided examples for the different dev kits based on RA8T1 and RA8M1 . Is there any way to have a higher priority of the thread and I could detect the serial port from host?

NP_Renesas · Answer

Hi Zero_One, 
 
 I try to replicate your problem on my board using official PCDC sample project but it works well, do you add some other stacks? 
 
 BR, 
 NP_Renesas

NP_Renesas · Answer

Hi Zero_One, 
 
 I check the USBX driver in our BSP, when creating USBX thread, it will also create tx&rx thread which has 10 priority: 
 
 So if you want to change the USBX priority less than 9, you have also to change the tx&rx thread priority. 
 
 BR, 
 NP_Renesas

Zero_One · Answer

Hi, 
 I am already using your official example. Actually, I managed to find the issue , it's related to 3 threads created in background together with PCDC ACM Thread, you already mentioned one thread which is configured by the macro "USB_TASK_PRI_BASE" , the other 2 threads priority is configured by a macro inside a header file called ux_port.h, the macro name is called "UX_THREAD_PRIORITY_CLASS" by default is set to 20, by changing this macro to my desired value (for my case 1), I was able to connect with my COM port, thanks for the support anyway. 
 
 Regards,