Howard,
How does the LVB detect an LCD presence ?
In all the LCD programming I have ever done, it has been just logic levels towards the LCD.
Nothing in return ?
Are you talking to the LCD CPU ?
---------------------------------------------------------------------------- Andrew Rich VK4TEC vk4tec@people.net.au mailto:vk4tec@people.net.au http://www.tech-software.net
-----Original Message----- From: amsat-bb-bounces@amsat.org [mailto:amsat-bb-bounces@amsat.org]On Behalf Of Howard Long Sent: Sunday, 13 January 2008 7:53 PM To: heliox694-iw1dtu@yahoo.com; 'AMSAT' Subject: [SPAM] [amsat-bb] Re: LVB tracker display problem Importance: Low
Hi Fer
I just finish to build an LVB tracker for a friend of mine. All works fine with NOVA but during a satellite pass the display stuck as in the picture:
I am not aware of a similar problem occuring. I wonder if it is possible to temporarily try a different display?
There is a section of code that attempts to detect whether an LCD exists or not, for those who don't use the LCD option. If at any point it takes more than 5ms to get a response from the LCD the software assumes there isn't one there and won't attempt to update the display again, until the tracker is reset.
However, looking at the display, it looks like the LCD may have somehow reset itself. This could make the software think that the LCD has been removed: a special startup sequence is needed to configure these LCDs after a reset.
Again, try a different LCD if possible, then check the power supply to the LCD is nice and stable without any glitches.
Also, if you simply press the reset push button, rather than cycle the power, does the display work correctly then? This initiates the LCD reconfiguration.
73, Howard G6LVB
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