Re: Using Visual C/C++ to do 8051 development
From: Chris Hills (chris_at_phaedsys.org)
Date: 02/08/04
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Date: Sun, 8 Feb 2004 13:53:11 +0000
In article <pan.2004.02.08.12.59.11.558572@albert.amresearch.com>,
Albert Lee Mitchell <albmit@albert.amresearch.com> writes
>On Sun, 08 Feb 2004 10:53:58 +0000, Chris Hills wrote:
>
>> -----------snip--------------
>> With 8051's most good ICEs use EXACTLY the same silicon as the target.
>> There is also often no way to test conclusively without one. At least
>> this is what I am told by people developing very high integrity and
>> safety critical devices.
>
> Please name a few, I'm unaware of one that doesn't have drivers and
>receivers nor can I imagine a quasi-bidirectional I/O port pulling up a
>18" tether at 25 MIPS without a driver.
Most 31/32 types use the actual part as a bond out is not required. Also
for all hooks parts the same silicon that is actually on the target.
Further to this one satellite manufacturer I know personally is using an
ICE and they measured ALL the interfaces and timings with and without an
ICE to see what effect the ICE had before they stated work.
Their actual figures proved that the ICE had a smaller effect than
changes in production and batch of the silicon. They use the simulator
for the VHDL as a *SIMULATION* but all that testing is validated by
using an ICE on the finished board.
Their comment was: "When you need to test reality a simulation is just
not good enough."
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\/\/\/\/\ Chris Hills Staffs England /\/\/\/\/\
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