some question about PassThru and CANFD

[uaes_hhl]

Can I use the PassThru API to enable the canfd transmission function of PCAN-USB FD?

[U.Wilhelm]

The FD Version of PassThru is not officially finished . So we have no final release for it.
(no ISO norm ready – no Release ready)
But we have buil, based on the GM Extension GMW177753, a PassThru Version that also Support CAN-FD.
Please contact our support if you are interested in a pre-release version of this API

[uaes_hhl]

So now I want to use the canfd transmission function of pcan-usbfd, am I only use the Can basic api?

[K.Wagner]

Hello,

PCAN-Basic: Supports CAN and CAN-FD protocols
PCAN-ISO-TP: Supports ISO-15765-2, a.k.a. ISO-TP, and uses CAN and CAN-FD as transport protocol.
PCAN-UDS: Supports ISO-15765-3/ISO-14229, a.k.a. UDS, and uses CAN as transport protocol.
PCAN-OBDII: Supports ISO-15765-4, a.k.a. OBDII, and uses CAN as transport protocol.
PCAN-PassThru: Suppors CAN, ISO-15765-2, and ISO-15765-4, and uses CAN as transport protocol.
PCAN-PassThru (GMW177753)-BETA: Supports CAN, ISO-15765-2, ISO-15765-4, using CAN as transport protocol; and the proprietary protocol GMW-177753 (ISO-15765-2, ISO-14229) using CAN-FD as transport protocol.

[uaes_hhl]

Thank you very much for your reply. I've got the DLL file, but where do I go to get the header file corresponding to the passthru API？

[K.Wagner]

Hello,

The PCAN-PassThru Api is actually thought to be used with applications that already implements J2534, so no header file is shipped. If you want to write your own J2534, you should acquire the documentation from SAE-J2534.

If you want to test the BETA-Version, that supports CAN-FD, you will need the GM documentation, GMW17753

Within the PDF shipped with PCAN-PassThru you find examples of use for each function API, with remarks on PEAK related data.

[uaes_hhl]

Hi,
PassThruIoctl always returns the error of "A PCAN Channel has not been initialized yet or the initialization process" when using passthru API to initialize canfd (ISO15765_FD_PS). However, if the option J1962_PINS is set, it will not retrun error, but I don't think I need to set this option. Is there any solution, or can you give a sample code to initialize canfd (ISO15765_FD_PS)?
Here is my code.

Code: Select all

void CfgFDDevice15765(SCONFIG * CfgItem, SCONFIG_LIST & Input, unsigned int BS_15765, unsigned int STMIN_15765)
{
	CfgItem[0].Parameter = BS_TX;
	CfgItem[0].Value = BS_15765; 
	//CfgItem[0].Value = 0xffff; 
	CfgItem[1].Parameter = STMIN_TX;
	CfgItem[1].Value = STMIN_15765;
	//CfgItem[1].Value = 0xffff;

	CfgItem[2].Parameter = ISO15765_BS;
	CfgItem[2].Value = 0; 
	CfgItem[3].Parameter = ISO15765_STMIN;
	CfgItem[3].Value = 0; 

	//CfgItem[4].Parameter = J1962_PINS ;  
	//CfgItem[4].Value = PIN6_14;

	Input.NumOfParams = 4; 
	Input.ConfigPtr = &(CfgItem[0]);
}

[K.Wagner]

Hello,

do you have initialized the channel already with PassThruOpen before calling the IOCTL? Regarding the Pin, this is the only supported one:

PassThru-FD.PNG (30.32 KiB) Viewed 2594 times

[uaes_hhl]

Hey, thank you for your reply. When I sent the can message, I encountered this problem：“Bus error: an error counter reached the 'heavy'/'warning' limit”. Can you tell me what caused it?

[M.Maidhof]

Hi,

possible reasons:
- wrong CAN cable
- no second active CAN node on your network
- no termination resistors in your CAN cables
- wrong baudrate

regards

Michael