AT89S8253's port bits in C

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Sergei Sergeievich
11/25/08 15:32
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#160299 - AT89S8253's port bits in C

Hi all!

A very basic thing, but I can't find it anywhere.
Namely, how to programatically access-set value and set the direction of Atmel's AT89S8253 port bits in C. I've tried DDR1=0x... and PORTP1=...; PORT1=... but it doesn't work. I can't find it anywhere on the web.
I've heard that 8051s don't have any port direction settings.

I'd appreciate any help concerning this issue.

Thanks ahead.

BR,
ssergeievich

List of 8 messages in thread

Topic Author Date
AT89S8253's port bits in C       Sergei Sergeievich       11/25/08 15:32
   What Compiler?       Neil Kurzman       11/25/08 17:18
      8051s don't have any port direction settings.       Andy Neil       11/26/08 01:36
   RE: I can't find it anywhere       Andy Neil       11/26/08 02:25
   Using 8051 port as output.       David Prentice       11/26/08 03:09
      Such a #define lies to the user       Per Westermark       11/26/08 04:55
         Point Taken       David Prentice       11/26/08 05:53
            8051 cannot perform as a SOURCE       Andy Neil       11/26/08 06:11

Back to Subject List

Topic	Author	Date
*AT89S8253's port bits in C*	Sergei Sergeievich	11/25/08 15:32
What Compiler?	Neil Kurzman	11/25/08 17:18
8051s don't have any port direction settings.	Andy Neil	11/26/08 01:36
RE: I can't find it anywhere	Andy Neil	11/26/08 02:25
Using 8051 port as output.	David Prentice	11/26/08 03:09
Such a #define lies to the user	Per Westermark	11/26/08 04:55
Point Taken	David Prentice	11/26/08 05:53
8051 cannot perform as a SOURCE	Andy Neil	11/26/08 06:11