topic What is the default secret key of uTaskerConvert ? in Kinetis Microcontrollers https://community.nxp.com/t5/Kinetis-Microcontrollers/What-is-the-default-secret-key-of-uTaskerConvert/m-p/924899#M53879 <HTML><HEAD></HEAD><BODY><P>Hello,</P><P>I´m currently testing utasker as a SD card loader and found out it is possible to generate the update binary with uTasker convert and only pass the magic number as an option. The crc16 is generated anyways, but which secret key is used to generate it ? I tried 0x00 and 0xFF but was not able to get the same crc16 in the loader application. Does anybody know which default secret key is applied by uTaskerConvert ?&nbsp;</P></BODY></HTML> Sat, 28 Sep 2019 20:14:37 GMT jamann 2019-09-28T20:14:37Z What is the default secret key of uTaskerConvert ? https://community.nxp.com/t5/Kinetis-Microcontrollers/What-is-the-default-secret-key-of-uTaskerConvert/m-p/924899#M53879 <HTML><HEAD></HEAD><BODY><P>Hello,</P><P>I´m currently testing utasker as a SD card loader and found out it is possible to generate the update binary with uTasker convert and only pass the magic number as an option. The crc16 is generated anyways, but which secret key is used to generate it ? I tried 0x00 and 0xFF but was not able to get the same crc16 in the loader application. Does anybody know which default secret key is applied by uTaskerConvert ?&nbsp;</P></BODY></HTML> Sat, 28 Sep 2019 20:14:37 GMT https://community.nxp.com/t5/Kinetis-Microcontrollers/What-is-the-default-secret-key-of-uTaskerConvert/m-p/924899#M53879 jamann 2019-09-28T20:14:37Z Re: What is the default secret key of uTaskerConvert ? https://community.nxp.com/t5/Kinetis-Microcontrollers/What-is-the-default-secret-key-of-uTaskerConvert/m-p/924900#M53880 <HTML><HEAD></HEAD><BODY><P>Hi Joerg</P><P></P><P><BR />uTaskerConvert generally is used with a magic number and a secret key (for basic header coding) [optionally also encryption settings as detailed at <A href="http://www.utasker.com/forum/index.php?topic=1445.0" target="test_blank">http://www.utasker.com/forum/index.php?topic=1445.0</A> ].</P><P><BR />However, if only a magic number is specified (and no secret key) it performs a CRC over the <SPAN style="text-decoration: underline;">raw code only</SPAN>. If you therefore don't add a secret key the check of the CRC should be done over the <SPAN style="text-decoration: underline;">length of the file only</SPAN> and don't add any additional stream data (neither 0x00 nor 0xff, etc.)</P><P></P><P>Regards</P><P></P><P>Mark</P><P></P><P></P><P></P><P></P><P><EM>Complete Kinetis solutions for professional needs, training and support: <A href="http://www.utasker.com/kinetis.html" target="test_blank">http://www.utasker.com/kinetis.html</A></EM></P><P></P><P><EM>uTasker: supporting &gt;1'000 registered Kinetis users get products faster and cheaper to market</EM></P></BODY></HTML> Sun, 29 Sep 2019 00:54:51 GMT https://community.nxp.com/t5/Kinetis-Microcontrollers/What-is-the-default-secret-key-of-uTaskerConvert/m-p/924900#M53880 mjbcswitzerland 2019-09-29T00:54:51Z