Home |
Search |
Today's Posts |
|
Electronics Repair (sci.electronics.repair) Discussion of repairing electronic equipment. Topics include requests for assistance, where to obtain servicing information and parts, techniques for diagnosis and repair, and annecdotes about success, failures and problems. |
Reply |
|
LinkBack | Thread Tools | Display Modes |
#1
Posted to sci.electronics.repair,alt.internet.wireless,comp.os.linux.hardware,sci.electronics.design,sci.electronics.misc
|
|||
|
|||
Finding GPIO pins on motherboard
Yo,
I've just started working with Linksys routers and loading open source Linux on them for an enhanced feature set and I've found problem lies with the limited amount of flash memory that these units have. To increase the router's available flash, you have to hack the mother board by finding the GPIO pins and running wires from them to an SD slot. The instructions for this procedure for the WRT54G with a BROADCOM BCM47are he http://wiki.openwrt.org/OpenWrtDocs/...g/Hardware/MMC My problem is that I have a newer WRT350N router with a BROADCOM 4705 cpu. What would be a generalized procedure for finding the GPIO pins for this motherboard? Thanx, Ed |
#3
Posted to sci.electronics.repair,alt.internet.wireless,comp.os.linux.hardware,sci.electronics.design,sci.electronics.misc
|
|||
|
|||
Finding GPIO pins on motherboard
On 12 jul, 21:13, wrote:
Yo, I've just started working with Linksys routers and loading open source Linux on them for an enhanced feature set and I've found problem lies with the limited amount of flash memory that these units have. To increase the router's available flash, you have to hack the mother board by finding the GPIO pins and running wires from them to an SD slot. The instructions for this procedure for the WRT54G with a BROADCOM BCM47are hehttp://wiki.openwrt.org/OpenWrtDocs/...g/Hardware/MMC My problem is that I have a newer WRT350N router with a BROADCOM 4705 cpu. What would be a generalized procedure for finding the GPIO pins for this motherboard? Thanx, Ed I did it on a WAP54G V31 (the link to my site is on the above link), and for the SDcard you need 4 basic signals, DI DO Clock and CE. The obvious was to use the LEDs (2 are on a GPIO port) and switches. Problem was there were only 2, SES and reset switch. In this version Linksys polls the reset and SES switches!! The polling routines (that are non-GPL anyways) need to be removed.. so the GPIOs can be used. Maybe that model of yours has more switches. To find which GPIO is connected to what, you need to make a serial port connection, or a telnet connection by uploading new firmware, then run gpio from that. There is a gpio.c test routine C source you can download: http://downloads.openwrt.org/people/nbd/tmp/gpio.c a gpio test routine that you Here you can read more about using it: http://forum.openwrt.org/viewtopic.php?id=7839 Download the Linksys sources for your box from http://www-au.linksys.com/servlet/Sa...2FVis itorWra and make sure you can compile it, and have a backup of the firmware. The best is if you can make a backup of the whole FLASH via JTAG, but I dunno if there is JTAG soft for your box, I had to modify some to make it work on my processor, see my site. Without the JTAG debrick I would have had to throw my box in the trash.... It stopped working after downloading _others_ firmware from the web. This because mine had only 2 MB FLASH,. Be warned. More he http://panteltje.com/panteltje/wap54g/index.html |
Reply |
Thread Tools | Search this Thread |
Display Modes | |
|
|
Similar Threads | ||||
Thread | Forum | |||
Roll Pins | UK diy | |||
Why would pins 3 & 100 on a DDR DIMM fry? | Electronics Repair | |||
finding the radio power pins | Electronics Repair | |||
acrow pins. | UK diy | |||
Finding dowel pins in ground surface? | Metalworking |