LPC MicrocontrollersのトピックUSB Mass Storage Host Enumeration https://community.nxp.com/t5/LPC-Microcontrollers/USB-Mass-Storage-Host-Enumeration/m-p/524571#M7207 <HTML><HEAD></HEAD><BODY><STRONG>Content originally posted in LPCWare by mb1391 on Tue Feb 11 01:49:48 MST 2014</STRONG><BR /><SPAN>Hi,</SPAN><BR /><BR /><SPAN>I am using nxpUSBlib v0.98b and LPCExpresso v6.1.0 for USB Mass Storage Host implementation on LPC17xx-40xx.</SPAN><BR /><SPAN>I have an issue regarding USB Mass Storage Device enumeration using LPCUSBLib.</SPAN><BR /><SPAN>When the target hardware detects voltage change on USB port, it invokes the enumeration sequence.</SPAN><BR /><BR /><SPAN>I have a USB flash drive to enumerate and I attach it to my hardware in OFF condition.</SPAN><BR /><SPAN>When I power ON my target hardware, it doesn't detect the voltage change on port and doesn't enumerate.</SPAN><BR /><BR /><SPAN>My application requires this kind of enumeration where there will be a USB flash drive attached and the hardware will have frequent power cycles.</SPAN><BR /><BR /><SPAN>How can this problem be fixed at driver level?</SPAN><BR /></BODY></HTML> Wed, 15 Jun 2016 16:49:31 GMT lpcware 2016-06-15T16:49:31Z USB Mass Storage Host Enumeration https://community.nxp.com/t5/LPC-Microcontrollers/USB-Mass-Storage-Host-Enumeration/m-p/524571#M7207 <HTML><HEAD></HEAD><BODY><STRONG>Content originally posted in LPCWare by mb1391 on Tue Feb 11 01:49:48 MST 2014</STRONG><BR /><SPAN>Hi,</SPAN><BR /><BR /><SPAN>I am using nxpUSBlib v0.98b and LPCExpresso v6.1.0 for USB Mass Storage Host implementation on LPC17xx-40xx.</SPAN><BR /><SPAN>I have an issue regarding USB Mass Storage Device enumeration using LPCUSBLib.</SPAN><BR /><SPAN>When the target hardware detects voltage change on USB port, it invokes the enumeration sequence.</SPAN><BR /><BR /><SPAN>I have a USB flash drive to enumerate and I attach it to my hardware in OFF condition.</SPAN><BR /><SPAN>When I power ON my target hardware, it doesn't detect the voltage change on port and doesn't enumerate.</SPAN><BR /><BR /><SPAN>My application requires this kind of enumeration where there will be a USB flash drive attached and the hardware will have frequent power cycles.</SPAN><BR /><BR /><SPAN>How can this problem be fixed at driver level?</SPAN><BR /></BODY></HTML> Wed, 15 Jun 2016 16:49:31 GMT https://community.nxp.com/t5/LPC-Microcontrollers/USB-Mass-Storage-Host-Enumeration/m-p/524571#M7207 lpcware 2016-06-15T16:49:31Z Re: USB Mass Storage Host Enumeration https://community.nxp.com/t5/LPC-Microcontrollers/USB-Mass-Storage-Host-Enumeration/m-p/524572#M7208 <HTML><HEAD></HEAD><BODY><STRONG>Content originally posted in LPCWare by ksufinger on Mon Nov 30 14:10:27 MST 2015</STRONG><BR /><SPAN>Try calling USB_ResetInterface(0) after the USB host has been initialized, and before your main loop begins.</SPAN></BODY></HTML> Wed, 15 Jun 2016 16:49:32 GMT https://community.nxp.com/t5/LPC-Microcontrollers/USB-Mass-Storage-Host-Enumeration/m-p/524572#M7208 lpcware 2016-06-15T16:49:32Z