stm32g431 ucpd sink USBPD_DPM_RequestMessageRequest busy forever
Hello,
I am running STM32G431 board with USBC PD feature.
CubeIDE 1.14.1
I am trying to bring up the UCPD stack.
I refer the basic guideline:
https://wiki.st.com/stm32mcu/wiki/STM32StepByStep:Getting_started_with_USB-Power_Delivery_Sink
It worked ideally.
Next step I made 2 simple steps:
- Save Source capabilities (parse and display it on default thread):
case USBPD_CORE_DATATYPE_RCV_SRC_PDO: /*!< Storage of Received Source PDO values */
memcpy(my_pdo_rdo_ctrl.pdo, Ptr, Size);
my_pdo_rdo_ctrl.num_of_pdo = Size/4;
b. Send request with my function (also on default thread):
USBPD_StatusTypeDef USBPD_DPM_RequestMessageRequest_fix(uint8_t IndexSrcPDO){
USBPD_StatusTypeDef _status = USBPD_ERROR;
USBPD_SNKRDO_TypeDef rdo;
rdo.d32 = 0;
rdo.GenericRDO.ObjectPosition = IndexSrcPDO;
rdo.FixedVariableRDO.OperatingCurrentIn10mAunits = my_pdo_rdo_ctrl.pdo[IndexSrcPDO - 1].SRCFixedPDO.MaxCurrentIn10mAunits;
rdo.FixedVariableRDO.MaxOperatingCurrent10mAunits = my_pdo_rdo_ctrl.pdo[IndexSrcPDO - 1].SRCFixedPDO.MaxCurrentIn10mAunits;
_status = USBPD_PE_Send_Request(0, rdo.d32, USBPD_CORE_PDO_TYPE_FIXED);
ucpd_printf(0, "FIX USBPD_DPM_RequestMessageRequest %x", _status);
return _status;
}
Eventually I get this capabilities from my power supply:
0 IN 256 0 SOP PD3 s:026 H:0x63A1 (id:1, DR:DFP, PR:SRC) SRC_CAPABILITIES DATA: 2C9101082CD102002CC103002CB10400F44106006421A4C1
Option: EPW
[1] Fixed : 5V - 3A /
[2] Fixed : 9V - 3A /
[3] Fixed : 12V - 3A /
[4] Fixed : 15V - 3A /
[5] Fixed : 20V - 5A /
[6] Programmable : [3.3V - 21V] - 5A /
Using this information, I call every 5 second either one:
USBPD_DPM_RequestMessageRequest_fix(2)
or
USBPD_DPM_RequestMessageRequest_fix(3)
It operates normally, and I can see requested voltages 9 and 12 volts changing.
However, after some time (always different), the USBPD_DPM_RequestMessageRequest_fix reports it is BUSY, and without reason communications with power supply is not seen.
This is my log:
2841 PE 640288 0 PE_STATE_READY_WAIT
2842 PE 645150 0 PE_SNK_SEND_REQUEST
2843 OUT 645150 0 SOP PD3 REQUEST s:006 H:0x1282 (id:1, DR:UFP, PR:SNK) DATA: 2CB10420 / ObjectPosition:2 / GiveBack:0 / CapabilityMismatch:0 / USBCommunicationCapable:0 / NoUSBSuspend:0 / UnchunkedExtendedMessagesSupported:0 / MaximumOperatingCurrent:440mA / OperatingCurrent:3000mA
2844 IN 645151 0 SOP s:002 H:0x0321 (id:1, DR:DFP, PR:SRC) GOODCRC
2845 PE 645151 0 PE_SNK_SELECT_CAPABILITY
2846 DEBUG 645151 0 FIX USBPD_DPM_RequestMessageRequest 0
2847 IN 645155 0 SOP PD3 ACCEPT s:002 H:0x09A3 (id:4, DR:DFP, PR:SRC)
2848 OUT 645155 0 SOP s:002 H:0x0841 (id:4, DR:UFP, PR:SNK) GOODCRC
2849 NOTIF 645155 0 POWER_STATE_CHANGE
2850 DEBUG 645155 0 ADVICE: USBPD_DPM_Notification:90
2851 NOTIF 645155 0 REQUEST_ACCEPTED
2852 DEBUG 645155 0 ADVICE: USBPD_DPM_Notification:1
2853 PE 645156 0 PE_SNK_TRANSITION_SNK
2854 IN 645287 0 SOP PD3 PS_RDY s:002 H:0x0BA6 (id:5, DR:DFP, PR:SRC)
2855 OUT 645287 0 SOP s:002 H:0x0A41 (id:5, DR:UFP, PR:SNK) GOODCRC
2856 NOTIF 645288 0 POWER_STATE_CHANGE
2857 DEBUG 645288 0 ADVICE: USBPD_DPM_Notification:90
2858 NOTIF 645288 0 POWER_EXPLICIT_CONTRACT
2859 DEBUG 645288 0 ADVICE: USBPD_DPM_Notification:16
2860 PE 645288 0 PE_STATE_READY
2861 NOTIF 645288 0 STATE_SNK_READY
2862 DEBUG 645288 0 ADVICE: USBPD_DPM_Notification:32
2863 PE 645288 0 PE_STATE_READY_WAIT
2864 DEBUG 650151 0 FIX USBPD_DPM_RequestMessageRequest 0
2865 DEBUG 655151 0 FIX USBPD_DPM_RequestMessageRequest 3
2866 DEBUG 660151 0 FIX USBPD_DPM_RequestMessageRequest 3
USBPD_DPM_RequestMessageRequest 3 ---->>> USBPD_BUSY,
Simple Unplug-Plug USB cable restarts UCPD stack and it again operates normally until stops again the same way after some time.
I searched for reasonable explanation, but cannot find - what may be the reason of this behaviour? Is it bug or feature? How to debug it?
I observe this with some of UCPD power supplies I have. Not all.
Please help.
Kind regards,
Ivan.