USBX endpoint address error , UX_MAX_DEVICE_ENDPOINTS

[ABasi.2]

Hi!

with cube IDE i'm trying to develop a USB device with 3 classes using  a STM32H523 with USBX and threadX.

If i select USB HID,USB MSC and USB ACM (virtual com port) the code is succesfully generated but if i close and reopen the .ioc GUI i have this message error:

the value of UX_MAX_DEVICE_ENDPOINTS can't be less then number of endpoints used.(used endpoints: 7). it will be set to 6.

what does it mean? is not possible to have 3 classes? or i have to change something in the endpoints and it can be done?

there is an example like this? or a guide to understande the endspoint manage

thank you

 

[FBL]

Hi @ABasi.2 

Would you attach ioc file to reproduce? Make sure to use latest version.

[ABasi.2]

Thankyou!

sure i can attach the ioc file

 

my cube ide is 1.17.0 

[Mohamed_AYED]

Hi @ABasi.2 

in stm32h5 the max endpoint is 8 

In your project you are using 

• ep 0 for controll (mondatory)
• ep 1 for hid class 
• ep 1 for storage in 
• ep 2 for storage out
• ep 3 for cdc acm ctl 
• ep 4 for cdc acm in 
• ep 5 for cdc acm out 

if you define this endpoints config the problem will dispparate in Mx

ensure that UX_DEVICE_BIDIRECTIONAL_ENDPOINT_SUPPORT is enbled 

• ep 0 for controll 
• ep 1 for hid
• ep 2 for storage in
• ep 2 for storage out
• ep 3 for ctl
• ep 4 for cdc acm in
• ep 4 for cdc acm out 
• total is 5 endpoints < max enpoints availble in this product

[ABasi.2]

Hello Mohamed

thank you! 

threre is a manual / video guide ecc about this topic that you know? i 'm new in USB and a want to learn

 

Is it possible to use the same end point for 2 different classes?

i saw a video from ST : https://www.youtube.com/watch?v=wCRIpp-OHY4&t=167s

where it seems possible if you respect the in and out configuration of endpint

 

thank you