topic Re: K66 : Legacy receive buffer descriptor in Kinetis Microcontrollers https://community.nxp.com/t5/Kinetis-Microcontrollers/K66-Legacy-receive-buffer-descriptor/m-p/647009#M39288 <HTML><HEAD></HEAD><BODY><P>Hi, Koichi,</P><P>I think the L flag is a IPv4 specific flag, the "Flags/Fragment offset" data in IP layer can determine the L bit in RxBD.</P><P>Hope it can help you</P><P>BR</P><P>XiangJun Rong</P><P><span class="lia-inline-image-display-wrapper" image-alt="pastedImage_1.png"><img src="https://community.nxp.com/t5/image/serverpage/image-id/11485i3CEC8D6FE764016E/image-size/large?v=v2&amp;px=999" role="button" title="pastedImage_1.png" alt="pastedImage_1.png" /></span></P></BODY></HTML> Tue, 06 Dec 2016 08:48:06 GMT xiangjun_rong 2016-12-06T08:48:06Z K66 : Legacy receive buffer descriptor https://community.nxp.com/t5/Kinetis-Microcontrollers/K66-Legacy-receive-buffer-descriptor/m-p/647008#M39287 <HTML><HEAD></HEAD><BODY><P>Dear community,<BR />We are checking a Legacy receive buffer descriptor.</P><P></P><P>In the manual K66P144M180SF5RMV2 Rev. 2, Table 50-33. Receive buffer descriptor field definitions<BR />it is described that the Field "L" indicates the&nbsp; "Last in frame". <BR />&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; 0 : The buffer is not the last in a frame.<BR />&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; 1 : The buffer is the last in a frame.</P><P></P><P>[Question]<BR />&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; How do I recognize the first in a frame ?</P><P></P><P>Best Regards, <BR />&nbsp; Koichi Sakagami</P></BODY></HTML> Mon, 05 Dec 2016 07:10:40 GMT https://community.nxp.com/t5/Kinetis-Microcontrollers/K66-Legacy-receive-buffer-descriptor/m-p/647008#M39287 koichisakagami 2016-12-05T07:10:40Z Re: K66 : Legacy receive buffer descriptor https://community.nxp.com/t5/Kinetis-Microcontrollers/K66-Legacy-receive-buffer-descriptor/m-p/647009#M39288 <HTML><HEAD></HEAD><BODY><P>Hi, Koichi,</P><P>I think the L flag is a IPv4 specific flag, the "Flags/Fragment offset" data in IP layer can determine the L bit in RxBD.</P><P>Hope it can help you</P><P>BR</P><P>XiangJun Rong</P><P><span class="lia-inline-image-display-wrapper" image-alt="pastedImage_1.png"><img src="https://community.nxp.com/t5/image/serverpage/image-id/11485i3CEC8D6FE764016E/image-size/large?v=v2&amp;px=999" role="button" title="pastedImage_1.png" alt="pastedImage_1.png" /></span></P></BODY></HTML> Tue, 06 Dec 2016 08:48:06 GMT https://community.nxp.com/t5/Kinetis-Microcontrollers/K66-Legacy-receive-buffer-descriptor/m-p/647009#M39288 xiangjun_rong 2016-12-06T08:48:06Z