Subject:
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bootstrap mode in assembling the HB
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Newsgroups:
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lugnet.robotics.handyboard
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Date:
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Wed, 9 Sep 1998 10:43:39 GMT
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Original-From:
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Steve Treagust <stevet@camtech.STOPSPAMnet.au>
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Viewed:
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1199 times
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hi
At present I am up to section 4.4, "serial line and stop switch".
I have installed all the components as per the section but when testing by applying power
and holding down the stop switch, the HB will not go into bootstrap mode. I have not
connected the interface board yet.
Every thing else has tested ok up to this section, including getting 2MHz clock measured
via an O/scope.
On closer inspection of the electronic catalogs, I notice there are a number of
configurations avaliable for resistor packs, ie RP4.
The two main rpacks seem to be all resistors commoned on one leg and brought out on a pin,
or separate resistors moulded inside a rpack.
I have installed the commoned pin type.
Looking at the circuit diagram it appears the separate resistors is the configuration I
require. Is this correct?
thanks in advance
steve t
adelaide
south australia
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Message has 1 Reply:
 | | Re: bootstrap mode in assembling the HB
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| yes, RP4 is four isolated resistors, and this being part of the serial line circuit, definitely explains your problem if you are using the common-terminal style. you can just install four 1K resistors if you don't have the correct r-pack handy. fred (...) (26 years ago, 9-Sep-98, to lugnet.robotics.handyboard)
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Message is in Reply To:
| | Bootstrap download mode
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| Hi I have been trying to get the HB into bootstrap mode without much success. Following the instructions in the manual, I held down the STOP button while turning on the HB. The red and green LEDs were supposed to turn on for a short period of time (...) (26 years ago, 5-Sep-98, to lugnet.robotics.handyboard)
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