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- From: nanders@plains.NoDak.edu (Noel Anderson)
- Subject: Re: Multiple Master 68HC11
- Sender: usenet@ns1.nodak.edu (News login)
- Message-ID: <C188E6.A3w@ns1.nodak.edu>
- Date: Thu, 21 Jan 1993 23:10:54 GMT
- Distribution: usa
- References: <1856@tekgen.bv.tek.com>
- Nntp-Posting-Host: plains.nodak.edu
- Organization: North Dakota Higher Education Computing Network
- Lines: 21
-
- In article <1856@tekgen.bv.tek.com> johnh@countach.pen.tek.com (John A. Hammond) writes:
-
- >Anybody in netland ever setup several (6 or so) 68HC11s in a multiple
- >master configuration? If so, how did you handle bus contention in hw and
- >sw?
-
- You don't mention if the "bus" is the SCI, the SPI, or the processor
- address/data/control signals. The SCI can be used in a multiple processor
- environment. The physical level can use EIA-485 signals and in software
- each HC11 can listen to what it is sending to detect contention and
- then back off a la ethernet.
-
- The latest issue of _Embedded Systems Programming_ deals with multi-micro-
- controllers. I haven't had time to read the issue in depth, but it might
- give you some ideas.
-
-
- --
- Noel W. Anderson nanders@plains.nodak.edu (Internet)
- Asst Prof, Computer Engineering "I speak for myself, not NDSU"
- EE Dept, North Dakota State University nanders@plains (BITNET)
-