LPC MicrocontrollersのトピックRe: Is LPC546XX USB ROM API support composite device? https://community.nxp.com/t5/LPC-Microcontrollers/Is-LPC546XX-USB-ROM-API-support-composite-device/m-p/1078886#M41508 <HTML><HEAD></HEAD><BODY><P>Hello <A _jive_internal="true" data-content-finding="Community" data-userid="19354" data-username="wangyanjun" href="https://community.nxp.com/people/wangyanjun">Yanjun Wang</A></P><P>&nbsp;</P><P>Only the USB stack in the SDK supports composite devices. The main difference can be in the USB RAM memory they use. I compiled two USB projects, one with the rom api and the other with the SDK USB stack. These were the results:</P><P></P><P><EM>For ROM API:</EM></P><P><span class="lia-inline-image-display-wrapper" image-alt="pastedImage_2.png"><img src="https://community.nxp.com/t5/image/serverpage/image-id/108782i36515B4261B990A5/image-size/large?v=v2&amp;px=999" role="button" title="pastedImage_2.png" alt="pastedImage_2.png" /></span></P><P><EM>With SDK USB Stack:</EM></P><P><span class="lia-inline-image-display-wrapper" image-alt="pastedImage_3.png"><img src="https://community.nxp.com/t5/image/serverpage/image-id/108783iDBA3709C950FC02C/image-size/large?v=v2&amp;px=999" role="button" title="pastedImage_3.png" alt="pastedImage_3.png" /></span></P><P></P><P>&nbsp;</P><P>Use the one you think is more adequate based on your project requirements.</P><P>Let me know if this is helpful, if you have more questions do not hesitate to ask me.</P><P>Best regards,</P><P>Omar</P></BODY></HTML> Mon, 01 Jun 2020 18:36:03 GMT Omar_Anguiano 2020-06-01T18:36:03Z Is LPC546XX USB ROM API support composite device? https://community.nxp.com/t5/LPC-Microcontrollers/Is-LPC546XX-USB-ROM-API-support-composite-device/m-p/1078885#M41507 <HTML><HEAD></HEAD><BODY><P>Is LPC546XX USB ROM API support composite device?</P><P>What is the difference between USB Stack in SDK and USB ROM API? Which one should I use?</P><P></P><P>Thank you!</P></BODY></HTML> Wed, 27 May 2020 08:58:21 GMT https://community.nxp.com/t5/LPC-Microcontrollers/Is-LPC546XX-USB-ROM-API-support-composite-device/m-p/1078885#M41507 wangyanjun 2020-05-27T08:58:21Z Re: Is LPC546XX USB ROM API support composite device? https://community.nxp.com/t5/LPC-Microcontrollers/Is-LPC546XX-USB-ROM-API-support-composite-device/m-p/1078886#M41508 <HTML><HEAD></HEAD><BODY><P>Hello <A _jive_internal="true" data-content-finding="Community" data-userid="19354" data-username="wangyanjun" href="https://community.nxp.com/people/wangyanjun">Yanjun Wang</A></P><P>&nbsp;</P><P>Only the USB stack in the SDK supports composite devices. The main difference can be in the USB RAM memory they use. I compiled two USB projects, one with the rom api and the other with the SDK USB stack. These were the results:</P><P></P><P><EM>For ROM API:</EM></P><P><span class="lia-inline-image-display-wrapper" image-alt="pastedImage_2.png"><img src="https://community.nxp.com/t5/image/serverpage/image-id/108782i36515B4261B990A5/image-size/large?v=v2&amp;px=999" role="button" title="pastedImage_2.png" alt="pastedImage_2.png" /></span></P><P><EM>With SDK USB Stack:</EM></P><P><span class="lia-inline-image-display-wrapper" image-alt="pastedImage_3.png"><img src="https://community.nxp.com/t5/image/serverpage/image-id/108783iDBA3709C950FC02C/image-size/large?v=v2&amp;px=999" role="button" title="pastedImage_3.png" alt="pastedImage_3.png" /></span></P><P></P><P>&nbsp;</P><P>Use the one you think is more adequate based on your project requirements.</P><P>Let me know if this is helpful, if you have more questions do not hesitate to ask me.</P><P>Best regards,</P><P>Omar</P></BODY></HTML> Mon, 01 Jun 2020 18:36:03 GMT https://community.nxp.com/t5/LPC-Microcontrollers/Is-LPC546XX-USB-ROM-API-support-composite-device/m-p/1078886#M41508 Omar_Anguiano 2020-06-01T18:36:03Z