Show pagesourceOld revisionsBacklinksBack to top × Table of Contents MMC/SD card over GPIO howto GPIO Pinouts GPIO Solder Points Configuration using UCI CLI Install packages Configure GPIOs Mount the MMC/SD card via fstab MMC/SD card over GPIO howto This is a short guide to get an MMC/SD card working with OpenWrt Kamikaze 8.09 and an 2.6 Kernel. The driver can be configured using either UCI CLI or the LuCI WebUI. GPIO Pinouts Description GPIO ------------------------------------ PIN 1, CS - Chip Select GPIO 7 PIN 2, DI - Data In GPIO 1 PIN 3, VSS - Ground GND PIN 4, VDD - 3.3 Volts 3.3 Volts PIN 5, CLK - Clock GPIO 3 PIN 7, DO - Data Out GPIO 4 GPIO Solder Points Images from PCB. Configuration using UCI CLI Install packages Required packages: kmod-mmc-over-gpio kmod-fs-ext4/kmod-fs-vfat/…. (we use the EXT3 file system here) cfdisk/fdisk (we use cfdisk here) e2fsprogs (for formating SD card to EXT3) opkg update opkg install kmod-mmc-over-gpio kmod-fs-ext4 cfdisk e2fsprogs kmod-nls-base kmod-nls-cp437 kmod-nls-iso8859-1 Nice to have packages: blkid opkg install blkid Configure GPIOs uci set mmc_over_gpio.@mmc_over_gpio[0].enabled=1 uci set mmc_over_gpio.@mmc_over_gpio[0].DI_pin=1 uci set mmc_over_gpio.@mmc_over_gpio[0].DO_pin=4 uci set mmc_over_gpio.@mmc_over_gpio[0].CLK_pin=3 uci set mmc_over_gpio.@mmc_over_gpio[0].CS_pin=7 uci commit mmc_over_gpio /etc/init.d/mmc_over_gpio enable /etc/init.d/mmc_over_gpio start If you ger an error saying “can't create /config/gpiommc/ directory” then first reboot the device. Mount the MMC/SD card via fstab To get partition mounted automatically you have to edit and change START=20 to START=98 in the /etc/init.d/fstab init script. uci add fstab mount uci set fstab.@mount[0].enabled=1 uci set fstab.@mount[0].fstype=ext3 uci set fstab.@mount[0].device=/dev/mmcblk0p1 uci set fstab.@mount[0].target=/mnt/mmc uci set fstab.@mount[0].options=rw,sync,noatime uci commit fstab /etc/init.d/fstab restart This website uses cookies. By using the website, you agree with storing cookies on your computer. Also you acknowledge that you have read and understand our Privacy Policy. If you do not agree leave the website.OKMore information about cookies Last modified: 2019/08/26 12:34by vgaetera