USB PD Stack Library with EPR

[janik]

Hi,

I use the USBPD Middleware to implement a PD Port with a G474RB. This is functional. Now I would like to implement USB-PD EPR. I cant find any settings that would make cubeMX use the EPR version of the stack, the cubeMX inputs are further limited to SPR ranges. 

Is it possible to use USB-PD EPR in cubeMX ? Information that i have found on this topic suggest that X-CUBE TCPP supports EPR, however the TCPP hardware itself does not support EPR anyway. So far I have not enabled the X-CUBE TCPP package since I dont use that hardware. I use a different port protection IC which is rated for EPR operation.

The USBPD stack in the up-to-date G4 firmware V1.6.3 seems to be Version 4.1, which is from 15-Dec-2021. That is before EPR was introduced with Version 5.0

So to summarise : Is there a way to force cubeMX to load the newer library ? Do I have to manually download the new library and link it?

Thank you,

Janik

[janik]

This seems to be a possible git submodule issue, where the submodule never got updated for the newer releases of the G4 firmware package.

[FBL]

Hi @janik 

I suggest checking whether the latest stm32-mw-usbpd-core at v5.4.0  version with EPR support can be integrated manually into  CubeG4.

[janik]

Hi @FBL 

I have done exactly that and updated the usbpd core in the G4 firmware, now cubeMX copies the updated library.

This works, however I cannot use cubeMX with the new library features - updating the library does not magically create a checkbox for something like "EPR Mode support" or EPR PDO.

These have to be added in code manually (Claude):

The PD 3.1 Is_EPR_Supported_SRC bit (visible in the v5.x USBPD library's USBPD_PD3SupportTypeDef union) has no CubeMX UI control, and the DPM_Settings initializer in the CubeMX-generated usbpd_dpm_conf.h sits outside every USER CODE block, so any direct edit is wiped on regen. USBPD_DPM_InitCore in the generated usbpd_dpm_core.c also has no USER CODE block inside its body. The only clean workaround is to runtime-patch DPM_Settings[port].PE_PD3_Support.d.Is_EPR_Supported_src=USBPD_TRUE from main.c's USER CODE BEGIN 2 before MX_USBPD_Init runs. 

It would be great if cubeMX with G4 could receive proper support for EPR.

[FBL]

Hi @janik 

Thank you for your feedback. This would be a great enhancement once we provide a hardware setup supporting EPR mode.