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MX2 Advance Gpo Fan Startup
Posted: Fri Aug 15, 2003 3:33 pm
by nickp
Hi,
I just started to use my MX2 agpo digital fan buss for my cpu and have a question. It works fine except that the fan does not start until lcd program starts running. Also the lcd backlight does not power up until usb is up and running. This leaves the system with no fan for a while and if the system was to hang on startup the cpu would cook. I have the agpo setup to start and stop at 100% with an min of 30 pwm. Do I have a setup problem? Any help would be great
Thanks,
Nick
Posted: Fri Aug 15, 2003 3:44 pm
by Miles
There is actually two steps to produce the wanted outcome...
1) You must solder the jumper pad next to where the unmodified power is applied (just above and to the right of the white connector).
2)To remember GPO status on start up you must enter the following raw commands in LCDC. You must include the two pound signs before every command to denote decimal. The last command may be from 0-255 as this is your PWM fan control. You can enter these raw commands in the text section of LCDC.
[##254][##195][##GPO#][##255]
Once LCDC starts up it will set the GPO's to default values...
Posted: Fri Aug 15, 2003 4:00 pm
by nickp
Henry,
Thanks for the quick response. I am wondering why my Dad's last rev Mx2 backlight comes on as soon as power is applied. It does not wait until the usb port has been configured. Has a change been made between the two revisions?
Thanks,
Nick
Posted: Fri Aug 15, 2003 4:01 pm
by nickp
Miles,
Sorry for the wrong name.
Nick
Posted: Fri Aug 15, 2003 4:03 pm
by Miles
Your Dad probably has revision 1.0 to where you have rev 1.4...
Posted: Fri Aug 15, 2003 4:06 pm
by nickp
Miles,
I belive you are correct about the version numbers. Is this difference in power up known and expected?
Thanks,
Nick
Posted: Fri Aug 15, 2003 4:15 pm
by Miles
yes..!
Posted: Fri Aug 15, 2003 4:17 pm
by nickp
Thank you, I will try the two steps you outlined.
Posted: Fri Aug 15, 2003 4:18 pm
by Miles
Let me know how you make out...!
Posted: Fri Aug 15, 2003 6:48 pm
by nickp
Made some progress. Joining the jumpers now turns on the display as soon as power is applied. I have tried to put the gpo string, [##254][##195][##GPO1][##255], into an on-start event, a screen, and in the bootup screen. The fan still only starts once LCDC is running not at MX2 power up.
Posted: Sat Aug 16, 2003 2:07 am
by Mat-Moo
[##gp01] should be a number 1,2,3 depending on which gpo you want, e.g. (LCDC v1.05.26+ only) [##254,195,1,255] would set GPO 1 to max speed on boot. Pre 1.05.26=[##254][##195][##1][##255]
Posted: Mon Aug 18, 2003 9:01 am
by Miles
Thanks Mat for clarifying that for me !!!
Posted: Sun Aug 24, 2003 6:47 am
by nickp
Hey folks,
After trying many different software setups I gave up. Still unable to get the fans started until LCDC software starts. Maybe someone else can find a solution.
Nick
Posted: Sun Aug 24, 2003 11:25 am
by Cliff Watson
nickp wrote:Hey folks,
After trying many different software setups I gave up. Still unable to get the fans started until LCDC software starts. Maybe someone else can find a solution.
Nick
Nick,
I've not been able to find a solution either.
My case fan does the same thing when booting from a power off condition. I would never trust this fan control for CPU cooling.
When power is applied to boot the computer the case fan tries to start and runs for about 1 second and then shuts down until LCDC is loaded and operational. At that time to fan speed goes to the % set in LCDC.
Posted: Mon Aug 25, 2003 9:27 am
by Miles
Assuming you have made the correct solder jump and the fan you want powered up is fan #1, you must load the following string in LCDC: [##254][##195][##1][##255]. You must enter the configure /test section and complete the appropriate infromation. Once that is completed, go to "test display" and in the text column enter the string and send. Let me know how you make out...I tried it at the office once again and it works as expected...