STM32G071RB USBPD Source auto send Source Cap

[H V N D]

STM32G071RB USBPD Source auto send Source Cap when start debug: after reset, I'm not connect cable to C-Type port, I click start debug ( ST-Link ), I send about 50 packet of source

Please see in trace and config in attach file

[H V N D]

@Community member​ , please support me

[Yohann M.]

Dear @H V N D​ 

I had a look at your application.

I can see that you did not implement a way to enable VBUS. Activation of VBUS is done when a CC connection is detected through the 'USBPD_DPM_UserCableDetection' callback:

/**
 * @brief UserCableDetection reporting events on a specified port from CAD layer.
 * @param PortNum The handle of the port
 * @param State CAD state
 * @retval None
 */
void USBPD_DPM_UserCableDetection(uint8_t PortNum, USBPD_CAD_EVENT State)
{
/* USER CODE BEGIN USBPD_DPM_UserCableDetection */
 switch(State)
 {
 case USBPD_CAD_EVENT_ATTACHED:
 case USBPD_CAD_EVENT_ATTEMC:
 {
 if (USBPD_OK != USBPD_PWR_IF_VBUSEnable(PortNum))
 {
 /* Should not occur */
 osDelay(6000);
 NVIC_SystemReset();
 }
 break;
 }
 case USBPD_CAD_EVENT_DETACHED :
 case USBPD_CAD_EVENT_EMC :
 default :
 {
 if (USBPD_OK != USBPD_PWR_IF_VBUSDisable(PortNum))
 {
 /* Should not occur */
 while(1);
 }
 break;
 }
 }
/* USER CODE END USBPD_DPM_UserCableDetection */
}

To help you in the integration of USB-PD application, I advise you to enable Utilities/TRACER_EMB feature in CubeMX. Please refer to following Wiki page for further details:

https://wiki.st.com/stm32mcu/wiki/USB_Power_Delivery_overview#Specific_tools

Regards,

Yohann

[H V N D]

Hi Yohann,

the problem is when I enable SRC or DRP mode, I'm not code anything, just build and run, and I see the CAD and PE task running and send some message when I'm not connect anything

[Yohann M.]

Hi

Could you please provide a .cpd trace of your issue?

I flashed your application in my side and I have no USB-PD activities in my side. PE task is not running when there are no connected cables.

Regards,

Yohann