Hi there,
The alix.2/3 manual mentions that port J11/J16 can be used for an alternate flash rom via an LPC adapter. The alix.1 manual describes the same on port J16.
The PC Engines adapter LPC.1A is mentioned in this context, but I can't find any documentation about it, not even on their website.
Ron, which adapter do you use? Would the one that comes with the programmable LPC dongle by the Artek Group work?
(http://www.artecgroup.com/products/hardware-products/programmable-lpc-dongle... and http://www.opencores.org/projects.cgi/web/usb_dongle_fpga/overview)
Thanks, Ward.
On Wed, 5 Dec 2007 17:17:19 -0500 Ward Vandewege ward@gnu.org wrote:
The PC Engines adapter LPC.1A is mentioned in this context, but I can't find any documentation about it, not even on their website.
You can order it directly from PC Engines. You just have to ask for it by email.
Later, João Matos
On Wed, Dec 05, 2007 at 05:17:19PM -0500, Ward Vandewege wrote:
The alix.2/3 manual mentions that port J11/J16 can be used for an alternate flash rom via an LPC adapter. The alix.1 manual describes the same on port J16.
The PC Engines adapter LPC.1A is mentioned in this context, but I can't find any documentation about it, not even on their website.
It's on the website but not linked, so you have to guess the filename.
Ron, which adapter do you use? Would the one that comes with the programmable LPC dongle by the Artec Group work?
Yes, Artec's LPC dongle works with the alix1c.
I'm using the previous product revision 441103 but there's no reason the current revision 441104 should not work equally well or better. (Allow longer cabling.)
It needs a cable with pins connected the right way, but no other components are needed.
I hacked the proper cable up by cutting up an old floppy cable and pressing a 10-pin header onto one end. This is my wiring diagram:
alix1c J16 LCLK0 1 2 GND LAD0 3 4 GND LAD1 5 6 GND LAD2 7 8 GND LAD3 9 10 GND LFRAME# 11 12 GND PCIRST# 13 14 NC CSEXT 15 16 VCC5 GND 17 18 VCC3 SERIRQ 19 20 LDRQ#
441103 J3 PCIRST 1 2 LAD0 LAD1 3 4 LAD2 LAD3 5 6 LFRAME# R330GND 7 8 PCICLK1 GND 9 10 VCC3 in
441103-alix1c: 1-13 2-3 3-5 4-7 5-9 6-11 8-1 9-2/4/6/8/10/12/17 10-nc -15/18
441103 pin 9 connects to any one of the alix1c pins, not all of them.
The last one, -15/18 means that pins 15 and 18 on the alix1c end should be connected together, but not to any pin on the dongle end, in order to pull CSEXT to 3.3V and tell alix to boot from LPC flash.
(Too bad CSEXT isn't active low, then it would just have been a jumper on the header on the board. Oh well. :)
The alix1c docs don't say if CSEXT is 5V or 3V so I played it safe and tried 3V first, which works.
My cable length is ca. 10cm. The LPC dongle docs say that cables should be kept to just a few cm but 10cm works fine for me.
Note that the above cable can supply power to the LPC dongle. Pay attention to JMP4 on the dongle or the alix power supply will be connected to the USB host power supply that the dongle is connected to. May or may not be a big deal depending on the power supply designs.
//Peter
On Thu, Dec 06, 2007 at 06:24:25AM +0100, Peter Stuge wrote:
GND 9 10 VCC3 in441103-alix1c: 1-13 2-3 3-5 4-7 5-9 6-11 8-1 9-2/4/6/8/10/12/17 10-nc -15/18
Note that the above cable can supply power to the LPC dongle.
Note that it can not. Sorry. I am too tired.
I left 10 not connected specifically to avoid the problem, since I think I'll usually be powering the LPC dongle from USB.
The dongle needs 200ms or so to boot, so it has to be powered up before the target board. I like pulling the power when trying a newly flashed LB so dongle has to get power from somewhere else.
//Peter
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Peter Stuge -
Triton -
Ward Vandewege