Mixed EFSL with USB
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#1171275
Hi everybody, I want to upload files and directory on an SD-CARD controlled by EFSL. I want to use the USB port for make the transfert. But I haven't any idea about the solution to use.I don't know how to use the usart to upload file into the SD-CARD. If anyone have an idea ... Thanks PS: sorry for my english ...
Guest
#1171276
coubi wrote: > Hi everybody, > I want to upload files and directory on an SD-CARD controlled by EFSL. I > want to use the USB port for make the transfert. But I haven't any idea > about the solution to use.I don't know how to use the usart to upload > file into the SD-CARD. If anyone have an idea ... > Thanks > PS: sorry for my english ... An "old school" solution would be to use the USB as a "virtual" com-port and transfer the files by a simple file-transfer-protocol i.e. X/Y/ZMODEM. Another not so modern solution would be to transfer the files-content with a self-written PC-software to the controller. This software could use something like ZMODEM inside but would not need a virtual COM-port but some kind of self-written USB-driver. A modern solution would be to implement a USB mass-storage device in the controller's firmware and use the OS's drivers. Keil has an storage-example for LPC214x (keil.com), Atmel has one for AT91SAM7 (needs registration, at91.com/atmel.com). Once the mass-storage code is working it should be relativly easy to interface read/writes to the efsl-routines. Martin Thomas
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#1171277
Hi Martin, I think, that I'll do two of this solutions because in a first case I want to acces in SD-CARD with a little bit of security and in second way with OS's Mass storage driver. I will use the source of Atmel for the mass storage. Thanks PS : I will correct the EFSL library for correct file name if you want this... For USB mass storage device, the SD-drive appeared to Windows O/S more like raw disc sectors. Filesystem used is Windows own Filesystems. EFSL is only needed when ARM7 read/write to the SD-Drive. (ARM7 alters the storage content and not just a simple mass storage where windows O/S is the only one altering the storage content). That works fine if both Windows O/S and ARM7 access the drive exclusively. I do NOT have any idea of how to handle both ARM7 and Windows O/S read/write the SD-Drive simultaneously (Lots of mobile phone, camera and etc only allow you to operate exclusively). if someone knows how to do it, please teach me. Thanks in advance! Regards Hi. I read this post and question is have some real code to make easy USB mass storage disc?? or MMC/SD card reader for GCC (WinARM)???? On Keil is example (memory) and memory is on RAM (4096). the example is only demonstration. Ifter inicialize copy binary image from flash to ram and then work with ram image. Have some idea how after write operation save data from ram to flash?? I want this only for demostration. regards Dzairo ReplyPlease log in before posting. |