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PCAN-UDS API:WaitForService()doesn't work
Posted: Wed 8. Jul 2020, 13:02
by Embers
Hello everyone
I used the PCAN-UDS API:SvcReadDataByIdentifier() to read data from ECU and it send the request message to ECU successful,I can view the response message from ECU in the PCAN-View,this message is correct,But when I used the PCAN-UDS API :WaitForService() to get the response from ECU ,there is an error code(PUDS_ERROR_NO_MESSAGE),it not get the response.Why there is no message when I use this API:WaitForService()?
Any help would be appreciated.
There is my code:
Code: Select all
// Sends a Physical ReadDataByIdentifier Request
ushort[] buffer = { (ushort)UDSApi.TPUDSSvcParamDI.PUDS_SVC_PARAM_DI_Test };
result = UDSApi.SvcReadDataByIdentifier(mConnectedChannelHandle, ref request, buffer, (ushort)buffer.Length);------>Send request successful.
System.Windows.Forms.MessageBox.Show(String.Format("Send Error occured: {0}", (int)result));
//Get response from ECU
if (result == TPUDSStatus.PUDS_ERROR_OK)
result = UDSApi.WaitForService(mConnectedChannelHandle, out response, ref request, out requestConfirmation);------->No message response.
if (result == TPUDSStatus.PUDS_ERROR_OK)
{
System.Windows.Forms.MessageBox.Show(String.Format("Response was received."));
}
else
// An error occurred
System.Windows.Forms.MessageBox.Show(String.Format("Error occured: {0}", (int)result));
Re: PCAN-UDS API:WaitForService()doesn't work
Posted: Wed 8. Jul 2020, 14:03
by F.Vergnaud
Hello Embers,
Please provide more information regarding the request you are sending (network address information: protocol, source and target address):
depending on those settings, you have to initialize mappings to successfully reveice and transmit segmented messages.
Re: PCAN-UDS API:WaitForService()doesn't work
Posted: Thu 9. Jul 2020, 03:26
by Embers
Hello Fabrice
I send my request message to ECU successful ,because I can view the request and response(ECU send to my test equipment) in the PCAN-View tool,but now I can't get response message by using the API:WaitForService().
There is my settings:
Code: Select all
private bool Send_Service()
{
int StrSize;
IntPtr StrPtr;
TPUDSStatus result;
TPUDSMsg message;
bool SendStatus;
TPUDSMsg request = new TPUDSMsg();
TPUDSMsg requestConfirmation = new TPUDSMsg();
TPUDSMsg response = new TPUDSMsg();
TPUDSMsg confirmation = new TPUDSMsg();
request.DATA = new byte[4095];
// initialization
/*Add mapping for physical request from External_Equipment to ECU_#X : ID=0x727*/
request.NETADDRINFO.SA = (byte)TPUDSAddress.PUDS_ISO_15765_4_ADDR_TEST_EQUIPMENT;
request.NETADDRINFO.TA = (byte)TPUDSAddress.PUDS_ISO_15765_4_ADDR_ECU_1;
request.NETADDRINFO.TA_TYPE = TPUDSAddressingType.PUDS_ADDRESSING_PHYSICAL;
request.NETADDRINFO.RA = 0x00;
request.NETADDRINFO.PROTOCOL = TPUDSProtocol.PUDS_PROTOCOL_ISO_15765_2_11B;
request.LEN = 8;
// data[0..3] holds CAN ID
request.DATA[0] = 0x00;
request.DATA[1] = 0x00;
request.DATA[2] = 0x07;
request.DATA[3] = 0x27;
// data[4..7] holds CAN ID Response
request.DATA[4] = 0x00;
request.DATA[5] = 0x00;
request.DATA[6] = 0x07;
request.DATA[7] = 0x2F;
StrSize = Marshal.SizeOf(request);
StrPtr = Marshal.AllocHGlobal(StrSize);
Marshal.StructureToPtr(request, StrPtr, false);
result = UDSApi.SetValue(mConnectedChannelHandle, TPUDSParameter.PUDS_PARAM_MAPPING_ADD, StrPtr, (uint)StrSize);
// Sends a Physical ReadDataByIdentifier Request
ushort[] buffer = { (ushort)UDSApi.TPUDSSvcParamDI.PUDS_SVC_PARAM_DI_Test };
result = UDSApi.SvcReadDataByIdentifier(mConnectedChannelHandle, ref request, buffer, (ushort)buffer.Length);
System.Windows.Forms.MessageBox.Show(String.Format("Send Error occured: {0}", (int)result));
//Get the response from ECU.
if (result == TPUDSStatus.PUDS_ERROR_OK)
{
result = UDSApi.WaitForService(mConnectedChannelHandle, out response, ref request, out requestConfirmation);
if (result == TPUDSStatus.PUDS_ERROR_OK)
{
Response = response;
System.Windows.Forms.MessageBox.Show(String.Format("Response was received."));
}
else
{
// An error occurred
System.Windows.Forms.MessageBox.Show(String.Format("Error occured: {0}", (int)result));
}
}
return SendStatus = result == TPUDSStatus.PUDS_ERROR_OK;
}
Best regards,
Embers
Re: PCAN-UDS API:WaitForService()doesn't work
Posted: Thu 9. Jul 2020, 09:25
by F.Vergnaud
You defined a one way communication as there is only a single mapping from the External Equipment to the ECU.
You need to define another mapping from the ECU to External equipment, which is the other way round:
Code: Select all
/*Add mapping for physical request from ECU_#X : ID=0x72F to External_Equipment */
request.NETADDRINFO.SA = (byte)TPUDSAddress.PUDS_ISO_15765_4_ADDR_ECU_1;
request.NETADDRINFO.TA = (byte)TPUDSAddress.PUDS_ISO_15765_4_ADDR_TEST_EQUIPMENT;
request.NETADDRINFO.TA_TYPE = TPUDSAddressingType.PUDS_ADDRESSING_PHYSICAL;
request.NETADDRINFO.RA = 0x00;
request.NETADDRINFO.PROTOCOL = TPUDSProtocol.PUDS_PROTOCOL_ISO_15765_2_11B;
request.LEN = 8;
// data[0..3] holds CAN ID
request.DATA[0] = 0x00;
request.DATA[1] = 0x00;
request.DATA[2] = 0x07;
request.DATA[3] = 0x2F;
// data[4..7] holds CAN ID Response
request.DATA[4] = 0x00;
request.DATA[5] = 0x00;
request.DATA[6] = 0x07;
request.DATA[7] = 0x27;
Re: PCAN-UDS API:WaitForService()doesn't work
Posted: Thu 9. Jul 2020, 09:37
by Embers
Hello Fabrice
Add another commuction mapping (ECU to test equipment),I have solved my problem. Thank you very much
Best regards,
Embers