Subject:
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Re: download problems
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Newsgroups:
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lugnet.robotics.handyboard
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Date:
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Wed, 3 Jun 1998 13:59:27 GMT
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Original-From:
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Fred G. Martin <[fredm@]AntiSpam[media.mit.edu]>
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Viewed:
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1234 times
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The motor state is insignificant before the board has booted. I.e.,
the fact the motors are on the red direction means nothing; it's just
the random state of the motor output latch when the board turns on
without a program.
The LCD screen should not have a solid black band, however. This
usually indicates a power problem. Check that you have a legitmate
+5v on your board's power ckt.
Also, you should see the following LED behavior:
1. before download: BATT and PWR LEDs fully off
2. during download: PWR LED flashes
3. after download: PWR LED on steady
If (1) is not true, then your board is not in download mode. Download
cannot proceed until the board is powered on with both of these LEDs off.
If (2) is not true, then your board is not receiving data from your
PC. Check your interface board power, serial cable, and telephone cable.
If (3) is not true, then something else indeterminate went wrong.
Fred
In your message you said:
> i am still having trouble with getting the PC to communicate with the
> handyboard. all conections seem to be correct, and the programs are
> configured correctly, but the thing will still not communicate properly.
> mabye there is a fault in the board itself, i am wondering what the screen
> should display in the bootstrap mode, i have a dark black bar in the top line • ,
> and nothing in the bottom. this is also what is on screen when the board is
> "on". is this correct? also, in any mode, the four red lights are on
> indicating a motor direction. should these be on during bootstrap mode?
> during download with "dl", the program downloads with no trouble, "dl" seems
> happy about what happens, but then when "trying to synchronize" does not work • ,
> it returns "failed". this has been as far as i got. to check the board, i
> tried to design a small assembler program that would use an XIRQ ISR to jmp t • o
> a line of code on the zero page to drive port B pins hi, but it would not
> download either. my concern, and opinion, is that i have a malfunctioning
> board. please help. thank you.
>
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Message is in Reply To:
 | | download problems
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| i am still having trouble with getting the PC to communicate with the handyboard. all conections seem to be correct, and the programs are configured correctly, but the thing will still not communicate properly. mabye there is a fault in the board (...) (26 years ago, 3-Jun-98, to lugnet.robotics.handyboard)
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