topic read/write USB/SD without filesystem in MQX Software Solutions https://community.nxp.com/t5/MQX-Software-Solutions/read-write-USB-SD-without-filesystem/m-p/1064799#M18488 <HTML><HEAD></HEAD><BODY><P>Is it possible to access read/write&nbsp; to a Usb Mass storage device directly without a filesystem? I think the overhead of a file system is too big. </P><P>I'd like to be able to simple access the entire device with MQX.</P></BODY></HTML> Sat, 06 Jun 2020 22:03:53 GMT davidzhu 2020-06-06T22:03:53Z read/write USB/SD without filesystem https://community.nxp.com/t5/MQX-Software-Solutions/read-write-USB-SD-without-filesystem/m-p/1064799#M18488 <HTML><HEAD></HEAD><BODY><P>Is it possible to access read/write&nbsp; to a Usb Mass storage device directly without a filesystem? I think the overhead of a file system is too big. </P><P>I'd like to be able to simple access the entire device with MQX.</P></BODY></HTML> Sat, 06 Jun 2020 22:03:53 GMT https://community.nxp.com/t5/MQX-Software-Solutions/read-write-USB-SD-without-filesystem/m-p/1064799#M18488 davidzhu 2020-06-06T22:03:53Z Re: read/write USB/SD without filesystem https://community.nxp.com/t5/MQX-Software-Solutions/read-write-USB-SD-without-filesystem/m-p/1064800#M18489 <HTML><HEAD></HEAD><BODY><P>Hi:</P><P></P><P>The USB doesn't have the implementation to have a R/W directly without a file system and the conclusion is that it is better for you use SD and explore using the IO driver and using the examples provided in the document MQXIOUG.pdf.</P><P></P><P>We already have an ESDHC driver.This driver defines common interface for communication with various types of cards including SD, SDHC, SDIO etc. The driver is currently used as an alternative to SPI low level communication for SDCARD wrapper under the MFS stack. You can find the example of using the driver in section 16.11 of MQXIOUG.pdf document.</P><P></P><P>Regard</P><P>Daniel</P></BODY></HTML> Wed, 24 Jun 2020 02:47:01 GMT https://community.nxp.com/t5/MQX-Software-Solutions/read-write-USB-SD-without-filesystem/m-p/1064800#M18489 danielchen 2020-06-24T02:47:01Z