LPC MicrocontrollersのトピックWhy USBHost_Mass_Storage is so slow on LPC1788,LPC1850 https://community.nxp.com/t5/LPC-Microcontrollers/Why-USBHost-Mass-Storage-is-so-slow-on-LPC1788-LPC1850/m-p/522862#M5498 <HTML><HEAD></HEAD><BODY><STRONG>Content originally posted in LPCWare by whoms on Sat Apr 28 17:51:11 MST 2012</STRONG><BR /><SPAN>I've tested nxpUSBLib 0.94 on LPC1788,LPC1850. USB flash disk is directly sector wrote using USBHost_Mass_Storage .</SPAN><BR /><SPAN>The speed is only 150KB/s. And I've verified the LPC1850's USB0 host is set at High Speed mode.</SPAN><BR /><SPAN>LPC1788 is running at 108MHz,USB CLK=48MHz</SPAN><BR /><SPAN>LPC1850 is running at 167MHz,USB CLK=480MHz</SPAN><BR /><BR /><SPAN>Can anybody give an explanation ? How to improve the USB flash disk writing speed to about 1MB/s on LPC185x or LPC435x ?</SPAN></BODY></HTML> Wed, 15 Jun 2016 16:42:41 GMT lpcware 2016-06-15T16:42:41Z Why USBHost_Mass_Storage is so slow on LPC1788,LPC1850 https://community.nxp.com/t5/LPC-Microcontrollers/Why-USBHost-Mass-Storage-is-so-slow-on-LPC1788-LPC1850/m-p/522862#M5498 <HTML><HEAD></HEAD><BODY><STRONG>Content originally posted in LPCWare by whoms on Sat Apr 28 17:51:11 MST 2012</STRONG><BR /><SPAN>I've tested nxpUSBLib 0.94 on LPC1788,LPC1850. USB flash disk is directly sector wrote using USBHost_Mass_Storage .</SPAN><BR /><SPAN>The speed is only 150KB/s. And I've verified the LPC1850's USB0 host is set at High Speed mode.</SPAN><BR /><SPAN>LPC1788 is running at 108MHz,USB CLK=48MHz</SPAN><BR /><SPAN>LPC1850 is running at 167MHz,USB CLK=480MHz</SPAN><BR /><BR /><SPAN>Can anybody give an explanation ? How to improve the USB flash disk writing speed to about 1MB/s on LPC185x or LPC435x ?</SPAN></BODY></HTML> Wed, 15 Jun 2016 16:42:41 GMT https://community.nxp.com/t5/LPC-Microcontrollers/Why-USBHost-Mass-Storage-is-so-slow-on-LPC1788-LPC1850/m-p/522862#M5498 lpcware 2016-06-15T16:42:41Z