LPC Microcontrollers中的主题 USB stops working when DMA transfering data from AHB SRAM https://community.nxp.com/t5/LPC-Microcontrollers/USB-stops-working-when-DMA-transfering-data-from-AHB-SRAM/m-p/553977#M14667 <HTML><HEAD></HEAD><BODY><STRONG>Content originally posted in LPCWare by jpplus on Tue Dec 09 19:33:39 MST 2014</STRONG><BR /><BR /><SPAN>I narrow down a USB stop working issue when transfering data from AHB SRAM address(0x2000 0000).</SPAN><BR /><SPAN>Basically, when the DMA transfer buffer from address of AHB SRAM, then USB stops working, but if I put the DMA destination buffer to local SRAM, then it can work.</SPAN><BR /><BR /><SPAN>to me, it is kind of AHB bus competetion between USB and DMA AHB SRAM.</SPAN><BR /><BR /><SPAN>Any solution for that?</SPAN><BR /><BR /><SPAN>My hardware is 4337.</SPAN></BODY></HTML> Wed, 15 Jun 2016 18:37:31 GMT lpcware 2016-06-15T18:37:31Z USB stops working when DMA transfering data from AHB SRAM https://community.nxp.com/t5/LPC-Microcontrollers/USB-stops-working-when-DMA-transfering-data-from-AHB-SRAM/m-p/553977#M14667 <HTML><HEAD></HEAD><BODY><STRONG>Content originally posted in LPCWare by jpplus on Tue Dec 09 19:33:39 MST 2014</STRONG><BR /><BR /><SPAN>I narrow down a USB stop working issue when transfering data from AHB SRAM address(0x2000 0000).</SPAN><BR /><SPAN>Basically, when the DMA transfer buffer from address of AHB SRAM, then USB stops working, but if I put the DMA destination buffer to local SRAM, then it can work.</SPAN><BR /><BR /><SPAN>to me, it is kind of AHB bus competetion between USB and DMA AHB SRAM.</SPAN><BR /><BR /><SPAN>Any solution for that?</SPAN><BR /><BR /><SPAN>My hardware is 4337.</SPAN></BODY></HTML> Wed, 15 Jun 2016 18:37:31 GMT https://community.nxp.com/t5/LPC-Microcontrollers/USB-stops-working-when-DMA-transfering-data-from-AHB-SRAM/m-p/553977#M14667 lpcware 2016-06-15T18:37:31Z