topic LPC1768 USB Host in LPC Microcontrollers https://community.nxp.com/t5/LPC-Microcontrollers/LPC1768-USB-Host/m-p/699876#M28182 <HTML><HEAD></HEAD><BODY><P style="color: #51626f; background-color: #ffffff; border: 0px; font-size: 14px;">Good Morning!</P><P style="color: #51626f; background-color: #ffffff; border: 0px; font-size: 14px;">&nbsp;</P><P style="color: #51626f; background-color: #ffffff; border: 0px; font-size: 14px;">I am using LPC1768FBD100 chip, and using USB host for my project. I am using two timers (1ms and 250us). The priority of USB is higher than timers. I am trying read information from USB inside timer&nbsp;(1ms specifically) but it is not working. Is important to know that I am using file system to read/write USB information. Is important to know too that I am opening the file out of the timer and only reading the content of file inside timer. In this process, when function&nbsp; FSUSB_DiskReadSectors is called the process is waiting for USB forever. If I open and read information from USB out of timer, everthing is working fine.</P><P style="color: #51626f; background-color: #ffffff; border: 0px; font-size: 14px;">&nbsp;</P><P style="color: #51626f; background-color: #ffffff; border: 0px; font-size: 14px;">Someone has this problem?</P><P style="color: #51626f; background-color: #ffffff; border: 0px; font-size: 14px;">&nbsp;</P><P style="color: #51626f; background-color: #ffffff; border: 0px; font-size: 14px;">Regards!&nbsp;</P></BODY></HTML> Fri, 06 Oct 2017 14:52:20 GMT alvarolopes 2017-10-06T14:52:20Z LPC1768 USB Host https://community.nxp.com/t5/LPC-Microcontrollers/LPC1768-USB-Host/m-p/699876#M28182 <HTML><HEAD></HEAD><BODY><P style="color: #51626f; background-color: #ffffff; border: 0px; font-size: 14px;">Good Morning!</P><P style="color: #51626f; background-color: #ffffff; border: 0px; font-size: 14px;">&nbsp;</P><P style="color: #51626f; background-color: #ffffff; border: 0px; font-size: 14px;">I am using LPC1768FBD100 chip, and using USB host for my project. I am using two timers (1ms and 250us). The priority of USB is higher than timers. I am trying read information from USB inside timer&nbsp;(1ms specifically) but it is not working. Is important to know that I am using file system to read/write USB information. Is important to know too that I am opening the file out of the timer and only reading the content of file inside timer. In this process, when function&nbsp; FSUSB_DiskReadSectors is called the process is waiting for USB forever. If I open and read information from USB out of timer, everthing is working fine.</P><P style="color: #51626f; background-color: #ffffff; border: 0px; font-size: 14px;">&nbsp;</P><P style="color: #51626f; background-color: #ffffff; border: 0px; font-size: 14px;">Someone has this problem?</P><P style="color: #51626f; background-color: #ffffff; border: 0px; font-size: 14px;">&nbsp;</P><P style="color: #51626f; background-color: #ffffff; border: 0px; font-size: 14px;">Regards!&nbsp;</P></BODY></HTML> Fri, 06 Oct 2017 14:52:20 GMT https://community.nxp.com/t5/LPC-Microcontrollers/LPC1768-USB-Host/m-p/699876#M28182 alvarolopes 2017-10-06T14:52:20Z Re: LPC1768 USB Host https://community.nxp.com/t5/LPC-Microcontrollers/LPC1768-USB-Host/m-p/699877#M28183 <HTML><HEAD></HEAD><BODY><P>Hi Alvaro,</P><P></P><P>I'm not sure you are going to be able to finish the reading in less than 1 ms, you could do some tests on how much time does it take to finish the reading. Also, I would recommend that you use the f_read function instead of FSUSB_DiskReadSectors. </P><P></P><P>Hope it helps!</P><P></P><P>Best Regards,<BR />Carlos Mendoza<BR />Technical Support Engineer</P></BODY></HTML> Thu, 19 Oct 2017 21:26:11 GMT https://community.nxp.com/t5/LPC-Microcontrollers/LPC1768-USB-Host/m-p/699877#M28183 Carlos_Mendoza 2017-10-19T21:26:11Z