Hi Marc, > I'm currently addinf CAN-FD support to the Candlelight firmware and looking > at the TX echo message from the CAN device to Linux. In your firmware for > CAN-FD frames, are you echoing the whole CAN FD structure gs_host_frame > with 64 byte data, or the classic CAN gs_host_frame with 8 byte data? In our firmware the whole 64 byte data is echoed back. > The Candlelight I use only works in full-speed USB (12 Mbit/s) max, which > means that the maximum transmission size is 64, which results in a TX echo > consisting of 2 USB transmissions. The Linux driver makes no use of the data > in the TX echo frame, so a classic CAN TX echo would suffice. Our device supports USB high-speed USB (480Mbit/s). Best regards, Peter Christ Electronic Systems GmbH http://www.christ-es.de/ Geschäftsführer: Franz Reichle Hauptsitz: Alpenstraße 34, 87700 Memmingen Amtsgericht Memmingen HRB 9102 Diese E-Mail enthält vertrauliche und/oder rechtlich geschützte Informationen. Wenn Sie nicht der richtige Adressat sind oder diese E-Mail irrtümlich erhalten haben, informieren Sie bitte sofort den Absender und vernichten Sie diese Mail. Das unerlaubte Kopieren sowie die unbefugte Weitergabe dieser Mail ist nicht gestattet. This e-mail may contain confidential and/or privileged information. If you are not the intended recipient (or have received this e-mail in error) please notify the sender immediately and destroy this e-mail. Any unauthorised copying, disclosure or distribution of the material in this e-mail is strictly forbidden.