LPC MicrocontrollersのトピックCannot communicate to LS device through FS HUB. https://community.nxp.com/t5/LPC-Microcontrollers/Cannot-communicate-to-LS-device-through-FS-HUB/m-p/583116#M20807 <HTML><HEAD></HEAD><BODY><STRONG>Content originally posted in LPCWare by sycc90 on Mon Feb 15 21:17:12 MST 2016</STRONG><BR /><SPAN>Hello everyone!</SPAN><BR /><BR /><SPAN>I'm developing an application with the LPC4337 uC using the embedded USB HS hardware and the LPCOpen USB library.</SPAN><BR /><SPAN>I need to communicate with a LS device that's connected downstream from the uC through a FS HUB, unfortunately this does not seem to work. After requesting for a control transfer (with the interface provided by LPCOpen: HcdControlTransfer) it gets stuck waiting for it to finish (by querying the transfer status). If I replace the FS HUB with a HS one then it works perfectly, so that somehow makes me think there's some trouble when dealing the a LS transaction through a FS HUB.</SPAN><BR /><SPAN>According to the manual (UM10503: section 25.8.1.4), the uC should handle sending the appropiate FS PRE-PID followed by the LS transfer and whatnot. So I'm certain this is supposed to be supported.</SPAN><BR /><BR /><SPAN>Is there anything I can try? It doesn't seem as if there's anything I need to configure (besides the pipe's speed, which I've set to LS as indicated by the manual section I indicated above, is that right?), it appears it's all handled internally by the LPCOpen library, so I'm kind of at a loss as to what to try.</SPAN><BR /><SPAN>I'll see if I can get a FS device to connect downstream and try that with the FS HUB to see what happens... in the meantime, any ideas?</SPAN><BR /><BR /><SPAN>Thank you all for your help!!</SPAN></BODY></HTML> Wed, 15 Jun 2016 19:08:38 GMT lpcware 2016-06-15T19:08:38Z Cannot communicate to LS device through FS HUB. https://community.nxp.com/t5/LPC-Microcontrollers/Cannot-communicate-to-LS-device-through-FS-HUB/m-p/583116#M20807 <HTML><HEAD></HEAD><BODY><STRONG>Content originally posted in LPCWare by sycc90 on Mon Feb 15 21:17:12 MST 2016</STRONG><BR /><SPAN>Hello everyone!</SPAN><BR /><BR /><SPAN>I'm developing an application with the LPC4337 uC using the embedded USB HS hardware and the LPCOpen USB library.</SPAN><BR /><SPAN>I need to communicate with a LS device that's connected downstream from the uC through a FS HUB, unfortunately this does not seem to work. After requesting for a control transfer (with the interface provided by LPCOpen: HcdControlTransfer) it gets stuck waiting for it to finish (by querying the transfer status). If I replace the FS HUB with a HS one then it works perfectly, so that somehow makes me think there's some trouble when dealing the a LS transaction through a FS HUB.</SPAN><BR /><SPAN>According to the manual (UM10503: section 25.8.1.4), the uC should handle sending the appropiate FS PRE-PID followed by the LS transfer and whatnot. So I'm certain this is supposed to be supported.</SPAN><BR /><BR /><SPAN>Is there anything I can try? It doesn't seem as if there's anything I need to configure (besides the pipe's speed, which I've set to LS as indicated by the manual section I indicated above, is that right?), it appears it's all handled internally by the LPCOpen library, so I'm kind of at a loss as to what to try.</SPAN><BR /><SPAN>I'll see if I can get a FS device to connect downstream and try that with the FS HUB to see what happens... in the meantime, any ideas?</SPAN><BR /><BR /><SPAN>Thank you all for your help!!</SPAN></BODY></HTML> Wed, 15 Jun 2016 19:08:38 GMT https://community.nxp.com/t5/LPC-Microcontrollers/Cannot-communicate-to-LS-device-through-FS-HUB/m-p/583116#M20807 lpcware 2016-06-15T19:08:38Z Re: Cannot communicate to LS device through FS HUB. https://community.nxp.com/t5/LPC-Microcontrollers/Cannot-communicate-to-LS-device-through-FS-HUB/m-p/583117#M20808 <HTML><HEAD></HEAD><BODY><STRONG>Content originally posted in LPCWare by sycc90 on Sun Feb 21 13:57:12 MST 2016</STRONG><BR /><SPAN>Ok, so I managed to get a FS device to connect to the FS HUB and that works perfectly as well.</SPAN><BR /><SPAN>The problem seems to be exactly what I first described then, communicating with a LS device through a FS HUB.</SPAN><BR /><BR /><SPAN>Does someone have any idea on how to use the LPC4337 like this?</SPAN><BR /><BR /><SPAN>Thank you!</SPAN></BODY></HTML> Wed, 15 Jun 2016 19:08:39 GMT https://community.nxp.com/t5/LPC-Microcontrollers/Cannot-communicate-to-LS-device-through-FS-HUB/m-p/583117#M20808 lpcware 2016-06-15T19:08:39Z