Añadir tarjeta sd a la fonera

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Fuente: http://www.larsen-b.com/Article/262.html

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Fonera SD Card Hack

I read on several websites, that some people managed to wire a SD Card (or a MMC) to a Fonera access point. After a little googling, I discover this can be done easily, so I decided to test.. but I run into one issue so I decided to describe the process here.

Here the finished result:

Let's give it a try:
Solder the SD Card

The first step, is to locate the SW pins (near the antenna).. simply solder some wires like this:

SD Car ----- Fonera
DO (pin 7) SW1
CLK (pin 5) SW2
DI (pin 2) SW5
CS (pin 1) SW6
Gnd (pin 3) Gnd
Vcc (pin 4) Vcc

Here you can see the SD Card pinouts at http://pinouts.ru/Memory/sdcard_pinout.shtml

You can solder the VCC, and Gnd on the serial pins.
Unsolder the Caps

In my first tests, I discovered the SD card is detected, so I checked the signals. And discover the clk isn't really clear.. So I decided to remove the capacitor on the SPI bus. (C142, C143, C144, C145)

Install software and test

Next we need to install the kernel module on OpenWRT. You can find it on the phrozen website (http://phrozen.org/fonera.html) . Simply ipkg install the file and it should be ok. Now, let's try: insert a SD Card, and reboot, you should see something like this in your log.

Jan 1 00:00:49 OpenWrt user.warn kernel: mmc : MMC Driver for Fonera Version 2.5 (050507) -- '2B|!2B' (john@phrozen.org)
Jan 1 00:00:49 OpenWrt user.warn kernel: mmc : Card Found
Jan 1 00:00:49 OpenWrt user.warn kernel: mmc : card in op mode
Jan 1 00:00:49 OpenWrt user.warn kernel: mmc : SIZE : 241, nMUL : 6, COUNT : 1932, NAME : 256MB
Jan 1 00:00:49 OpenWrt user.warn kernel: mmc : Card Initialised
Jan 1 00:00:49 OpenWrt user.warn kernel: mmc : The inserted card has a capacity of 253231104 Bytes
Jan 1 00:00:49 OpenWrt user.warn kernel: mmc : adding disk
Jan 1 00:00:49 OpenWrt user.info kernel: mmc1
Jan 1 00:00:49 OpenWrt user.warn kernel: mmc : Card was Found

So now you can mount it:

mount /dev/mmc0 /mnt

This stuff, is working really well, I managed to have around 150Ko/s (reading) which is far enough for my needs. The only issue right now, is that you need to carefully umount the card before removing it, otherwise the fonera will crash.

Enjoy Fonera ??

Jeje, ahora toca investigar como tranformar una sd en usb, para ponerlo un disco duro Grin

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