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Hi everyone,
I'm trying to implement a fat file system on sd card I followed the instructions for Altera SPI Core on this page http://www.nioswiki.com/operatingsystems/uclinux/mmcsd didn't work... was I suppose to use SPI (3 wire) IP? thanks, AsafLink Copied
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Yep.
Using the fast (nonSPI) SD-Card interface interface requires joining the SD-Card Organization and paying money for the license. So you need to stick with the slow SPI interface, unless you want to do so. There are commercial SD-Card IP-Cores available that enable the use of this interface. -Michael- Mark as New
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thanks but I'm into the free stuff :)
maybe I configured somthing wrong in the IP...- Mark as New
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Hi,
--- Quote Start --- Hi everyone, http://www.nioswiki.com/operatingsystems/uclinux/mmcsd didn't work... --- Quote End --- What claims does your kernel say? Kazu- Mark as New
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well, I'm still stuck
I thought I'd see something like this --- Quote Start --- Freeing unused kernel memory: 676k freed (0x1f6000 - 0x29e000) mmc0: new SD card on SPI mmcblk0: mmc0:0000 TWTTI 124672KiB mmcblk0: p1 p2 --- Quote End --- on boot, as ashown in nioswiki so I thought of a few possible problems 1. pin assignments 2. IP core not configured as should 3. driver not loaded now I'm down to either it's an IP problem or driver problem so just to make sure again it is Altera's SPI (3 wire interface) IP, right? not someone else's similar IP? and if so could someone show me the right configuration? Thanks again, Asaf- Mark as New
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I just recently went through getting the SD card working on my DE2-70 board and was able to finally mount my 4 GB SD card with a standard vfat file system. Here's what I did, let us know if this helps you get yours working...
1) I started my project by using the DE2_70_NET project found on Terasic's DE2-70 CD freely available on their site. I'd start with that if you happen to be using that board. In any case, it might be a good reference. I had to remove the GPIO pins they used for SD card access as it's not compatible with the uClinux MMC/SD/SDIO over SPI driver. Then I added a new component "SPI (3 wire serial)" to my SOPC builder design called mmc_spi (I think the name matters as uClinux drivers look for it) at base address 0x09606000 (address probably doesn't matter as long as there's no conflict). 2) I had to change the assignment of pins in the top level design (DE2_70_NET.v), removing references to SD_* components which no longer exist, and adding the following lines starting at 549 (seemed like a good place)... Line 549: // the_mmc_spi (SD Card Slot) Line 550: .SCLK_from_the_mmc_spi(oSD_CLK), Line 551: .MOSI_from_the_mmc_spi(SD_CMD), Line 552: .MISO_to_the_mmc_spi(SD_DAT), Line 553: .SS_n_from_the_mmc_spi(SD_DAT3), Then I compiled the design. 3) Changes to the Kernel config: (Anything not explicitly shown as added was kept as is, if it was added by default I left it alone and didn't remove it) -- forgive underscores here, I can't get this forum to properly indent with whitespace --> Device Drivers ___ * --> SPI Support _________* Altera SPI Controller --> Device Drivers ____* --> mmc/SD/SDIO Support _________* mmc/SD/SDIO over SPI --> File Systems ___--> Native Language Support _______* Codepage 437 (US, Canada) _______* NLS ISO 8859-1 (Latin 1... 4) Recompiled the kernel. 5) Booted the design. If things went well, you should see something like this as your kernel boots (without a card installed)... mmc_spi spi2.0: ASSUMING SPI bus stays unshared! mmc_spi spi2.0: ASSUMING 3.2-3.4 V slot power mmc_spi spi2.0: SD/MMC host mmc0, no DMA, no WP, no poweroff <No further mmc_sip messages at bootup> With my 4 GB SD card inserted it'll look like this... mmc_spi spi2.0: ASSUMING SPI bus stays unshared! mmc_spi spi2.0: ASSUMING 3.2-3.4 V slot power mmc_spi spi2.0: SD/MMC host mmc0, no DMA, no WP, no poweroff <A few other lines of booting messages> mmc0: host does not support reading read-only switch. assuming write-enable. mmc0: new SDHC card on SPI mmcblk0: mmc0:0000 SD04G 3.69 GiB mmcblk0:Command: mount -t proc proc /proc -o noexec,nosuid,nodev p1 Then at the command prompt provided mount is in your kernel's app config somewhere (I think it is by default?) just type the following... /> mount -t vfat /dev/mmcblk0p1 /mnt /> ls -l /mnt drwxrwxrwx 3 root root 4096 Oct 17 2009 FPGADev drwxrwxrwx 2 root root 4096 Nov 29 16:04 NewFolder -rwxr-xr-x 1 root root 20 Nov 2 2009 newerfile.txt /> Hopefully that'll show you what's on your SD card! I hope this helps you out. Good Luck!- Mark as New
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Hi,
--- Quote Start --- so I thought of a few possible problems 1. pin assignments 2. IP core not configured as should 3. driver not loaded --- Quote End --- The kernel messages
mmc0: new SD card on SPI
mmcblk0: mmc0:0000 TWTTI 124672KiB
mmcblk0: p1 p2
show that your SD card has 124672Kbyte volume and 2 partitions. If it is right, please consider well why your kernel knows such thing. Without several communications between your kernel and SD, it can't display those information. And did you execute the 'mount' command? For example, please type
root> mount -t vfat /dev/mmcblk0p1 /mnt
to mount your SD's partition 1 for /mnt. (Opps, before to do this, please check the major number of /dev/mmcblk0p1 with 'ls /dev/mmcblk0p1 -l'. The number must be 179.:D) ...And, what is the claim? Kazu
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hi eltoddo,
thanks for the help but 1. my design is written in vhdl so, not *_top.v 2. I did the rest of the steps but with or without the sd card I get no mmc_spi message at boot any idea why?- Mark as New
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btw, I'm using Terasic's DE0 dev board if it helps...
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ok, here's an update
it appears that there's a BIG difference between [*] and <M> (my bad;) ) so the good news are that it worked only when I selected my options as [*] the bad new are... well... when I usemount -t vfat /dev/mmcblk0 /mnt
I get Invalid argument error any ideas?
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ok, now it's officialy closed!
I just needed to format my sd card using mkfs.vfat command or through windows :S anyway, thanks for all your help and support! :D- Mark as New
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I have the same problem,don't know how to handle it.
just display the message above ,no other messages,who can give me helps? : mmc_spi spi2.0: ASSUMING SPI bus stays unshared! mmc_spi spi2.0: ASSUMING 3.2-3.4 V slot power mmc_spi spi2.0: SD/MMC host mmc0, no DMA, no WP, no poweroff- Mark as New
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... This output seems OK. What is the problem ?
-Michael- Mark as New
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mmc_spi spi2.0: ASSUMING SPI bus stays unshared!
mmc_spi spi2.0: ASSUMING 3.2-3.4 V slot power mmc_spi spi2.0: SD/MMC host mmc0, no DMA, no WP, no poweroff ... but when I try to moun it /> mount -t vfat /dev/mmcblk0p1 /mnt mount: mounting /dev/mmcblk0p1 on /mnt failed: No such device or address I have insert 4GB SDcard,but cannot found the message above and cannot mount it. ———————————————————————————————— mmc0: host does not support reading read-only switch. assuming write-enable. mmc0: new SDHC card on SPI mmcblk0: mmc0:0000 SD04G 3.69 GiB mmcblk0:Command: mount -t proc proc /proc -o noexec,nosuid,nodev p1 ——————————————————————————————————- Mark as New
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(using the drivers as modules), to allow for Linux and Windows formatted cards, which uses different partition tables)I do this:
modprobe mmc_block modprobe mmc_spi# sd card formatted by Windows (no parition table) mount -t vfat /dev/mmcblk0 /mnt/sdcard# sd card formatted by Linux (first parition) mount -t vfat /dev/mmcblk0p1 /mnt/sdcard- Mark as New
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I want know why after I use nios2-terminal command, I cann't see the display messages above,is the hardware problem or pin assign problem?
"mmc0: host does not support reading read-only switch. assuming write-enable. mmc0: new SDHC card on SPI mmcblk0: mmc0:0000 SD04G 3.69 GiB mmcblk0:Command: mount -t proc proc /proc -o noexec,nosuid,nodev " DO you means that I should download the zImage and mmc_block.o and mmc_spi.o at first ?and modprobe mmc_block and mmc_spi ? I make zImage with mmc_block.o and mmc_spi.o. "nios2-linux/uClinux-dist/linux-2.6.x/drivers/mmc/host/mmc_spi.o" "nios2-linux/uClinux-dist/linux-2.6.x/drivers/mmc/card/mmc_block.o"- Mark as New
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Sorry. Most of your messagge does not make sense to me. Please rephrase.
I suppose the "Read only switch" is not supported by the hardware. -Michael- Mark as New
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again:
At first, after command nios2-download and nios2-terminal,just display " mmc_spi spi2.0: ASSUMING SPI bus stays unshared! mmc_spi spi2.0: ASSUMING 3.2-3.4 V slot power mmc_spi spi2.0: SD/MMC host mmc0, no DMA, no WP, no poweroff ... " no other message as "mmc0: host does not support reading read-only switch. assuming write-enable. mmc0: new SDHC card on SPI mmcblk0: mmc0:0000 SD04G 3.69 GiB mmcblk0:Command: mount -t proc proc /proc -o noexec,nosuid,nodev " follow your suggestion ,I have donwnload zImage , mmc_block.o and mmc_spi.o,and modporbe it ,but display errors like :modprobe : chdir <2.6.30>no such file or directory.- Mark as New
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I see this:
========================================================== Command: mkdir /mnt/sdcard Command: /etc/mount_sdcard Shell invoked to run file: /etc/mount_sdcard Command: modprobe mmc_block Command: modprobe mmc_spi mmc_spi spi2.0: ASSUMING SPI bus stays unshared! mmc_spi spi2.0: ASSUMING 3.2-3.4 V slot power mmc_spi spi2.0: SD/MMC host mmc0, no DMA, no WP, no poweroff Command: mount -t vfat /dev/mmcblk0 /mnt/sdcard mmc0: host does not support reading read-only switch. assuming write-enable. mmc0: new SD card on SPI mmcblk0: mmc0:0000 121 MiB mmcblk0: Command: mount -t vfat /dev/mmcblk0p1 /mnt/sdcard mount: mounting /dev/mmcblk0p1 on /mnt/sdcard failed: No such device or address Execution Finished, Exiting ============================================================= Thus mmcblk0 is mounted, while mounting /dev/mmcblk0p1 fails, as this is a Windows-formatted SD-Card without a partition table. -Michael- Mark as New
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why I cannt see the message at the process of uclinux startup?
like " Command: mount -t vfat /dev/mmcblk0 /mnt/sdcard mmc0: host does not support reading read-only switch. assuming write-enable. mmc0: new SD card on SPI mmcblk0: mmc0:0000 121 MiB mmcblk0: Command: mount -t vfat /dev/mmcblk0p1 /mnt/sdcard mount: mounting /dev/mmcblk0p1 on /mnt/sdcard failed: No such device or address Execution Finished, Exiting " and when I typed "mount -t vfat /dev/mmcblk0 /mnt/sdcard " also display "No such device or address "- Mark as New
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we know than :(
-Michael- Subscribe to RSS Feed
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