STM32G4 USB-PD board restarting after SRC cababilities are recieved

[BoSt]

Hi!

I am having big troubles getting USB-PD sink on the STM32G431KBT to work. I am using CubeMX and following the AN5418 Complete USB-PD application example and using FREERTOS 10.3.1 and USBPD 3.3.0.

Connected to my wall adapter the debug traces looks as follow:

The source always resetting its power after the source capabilities are recieved. And the board restarts.

Any ideas how to fix this? 

[FBL]

Hi @BoSt 

I assume the sink cannot evaluate the received source capabilities to determine the best power profile to request.

Did you check user code section dedicated for evaluating capabilities 

[BoSt]

Thanks, for reply! 

I have tried both the:

void USBPD_DPM_SNK_EvaluateCapabilities(uint8_t PortNum, uint32_t *PtrRequestData, USBPD_CORE_PDO_Type_TypeDef *PtrPowerObjectType)

{

/* USER CODE BEGIN USBPD_DPM_SNK_EvaluateCapabilities */

USBPD_USER_SERV_EvaluateCapa(PortNum, PtrRequestData, PtrPowerObjectType);

}

and the code from the example:

void USBPD_DPM_SNK_EvaluateCapabilities(uint8_t PortNum, uint32_t *PtrRequestData, USBPD_CORE_PDO_Type_TypeDef *PtrPowerObjectType)

{

/* USER CODE BEGIN USBPD_DPM_SNK_EvaluateCapabilities */

uint32_t *srcPDOs;

uint32_t srcPDOCount;

// Retrieve Source PDOs for evaluation

USBPD_PWR_IF_GetPortPDOs(PortNum, USBPD_CORE_DATATYPE_SRC_PDO, (uint8_t*)&srcPDOs, &srcPDOCount);

USBPD_SNKRDO_TypeDef rdo;

/* Initialize RDO */

rdo.d32 = 0;

/* Prepare the requested pdo */

rdo.FixedVariableRDO.ObjectPosition = 0;

rdo.FixedVariableRDO.OperatingCurrentIn10mAunits = 50;

rdo.FixedVariableRDO.MaxOperatingCurrent10mAunits = 50;

rdo.FixedVariableRDO.CapabilityMismatch = 0;

*PtrPowerObjectType = USBPD_CORE_PDO_TYPE_FIXED;

*PtrRequestData = rdo.d32;

/* USER CODE END USBPD_DPM_SNK_EvaluateCapabilities */

}

with the same results. The board are still resetting!

[FBL]

Hi @BoSt 

Is PPS Programmable power supply activated? Could it be disabled for test? Would you share minimal project to reproduce?

[BoSt]

No, i dont think its activated!

I have a minimal project with just one task blinking a LED. The MX_USBPD_Init(); are hanging up the program and not even the blink task is starting after the board has reset.

On my test board the UCPD1_CC1 and UCPD1_CC2 are connected directly to the USB-C connector and VBUS connected to a voltage regulator. 

Thanks!