topic SDCard Unset Alignment Slows Transfer in MQX Software Solutions https://community.nxp.com/t5/MQX-Software-Solutions/SDCard-Unset-Alignment-Slows-Transfer/m-p/639120#M17044 <HTML><HEAD></HEAD><BODY><P>The spi sdcard driver does not set the sdcard_struct alignment variable. It has a value of zero.</P><P>This prevents MFS from direct writing the applications buffer, incurring a an additional memcpy.&nbsp;</P><P>Can we not know the alignment, or maybe default it to 1 instead of zero?</P></BODY></HTML> Fri, 23 Dec 2016 03:28:34 GMT leifzars 2016-12-23T03:28:34Z SDCard Unset Alignment Slows Transfer https://community.nxp.com/t5/MQX-Software-Solutions/SDCard-Unset-Alignment-Slows-Transfer/m-p/639120#M17044 <HTML><HEAD></HEAD><BODY><P>The spi sdcard driver does not set the sdcard_struct alignment variable. It has a value of zero.</P><P>This prevents MFS from direct writing the applications buffer, incurring a an additional memcpy.&nbsp;</P><P>Can we not know the alignment, or maybe default it to 1 instead of zero?</P></BODY></HTML> Fri, 23 Dec 2016 03:28:34 GMT https://community.nxp.com/t5/MQX-Software-Solutions/SDCard-Unset-Alignment-Slows-Transfer/m-p/639120#M17044 leifzars 2016-12-23T03:28:34Z Re: SDCard Unset Alignment Slows Transfer https://community.nxp.com/t5/MQX-Software-Solutions/SDCard-Unset-Alignment-Slows-Transfer/m-p/639121#M17045 <HTML><HEAD></HEAD><BODY><P>Hi Leif Zars</P><P></P><P>I think it is OK to set the alignment value to 1 , which means no special requirement.</P><P></P><P>Regards</P><P>Daniel</P></BODY></HTML> Tue, 14 Feb 2017 03:19:23 GMT https://community.nxp.com/t5/MQX-Software-Solutions/SDCard-Unset-Alignment-Slows-Transfer/m-p/639121#M17045 danielchen 2017-02-14T03:19:23Z