Subject:
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Re: Digit outputs....
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Newsgroups:
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lugnet.robotics.handyboard
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Date:
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Thu, 20 Feb 1997 06:00:51 GMT
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Original-From:
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Mike Degon <DEGON@CADETMAIL.USCGAnospam.EDU>
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Viewed:
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1773 times
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Rather than trying to figure out the hex for the bits, I use the IC binaray
number format, "0b". I set the bits using a binary mask, for example, to
set the MOSI pin high, I use:
bit_set(0x1008, 0b00001000)
then to set the MOSI pin low, I use:
bit_clear(0x1008, 0b00001000)
The location of the 1's in the mask indicate the bits to be set or cleared.
There is a pretty good explanation of this in the HandyBoard Manual.
Hope it helps,
Mike Degon
> I've tried to program the digital outputs from the SPI
> header J6 on the HB with no success. I pump the values
> into the HB as per instruction form the FAQ note and measure
> the 4 outputs. No high/low, just some sort of oscillation.
>
> What could be my mistake.... I do a poke(0x1009, 0x3c) to
> make them outputs (as per instruction) then, poke(0x1008, 0x??)
> Give examples of what you might stick here.
> It states in the FAQ notes that.....
>
> bit J6 pin
> --- ------
> 5 SS
> 4 SCK
> 3 MOSI
> 2 MISO
>
> Any help with this would be greatly appreciated. Thank you.
>
> ----------------------------------------------------------
> Adam B. Cox check out my web page
> Computer Engineer http://www.zenox.com/~adam
> Zenox Communications Corp. vmail: 416-241-7000 (x224)
> ----------------------------------------------------------
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