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In one of my project I am talking with MX909 Driver IC with C51 ucontroller. To initialize MX909 if I write module in Assembly language it's working fine. Once I replaced with C same module it's not working.
The only difference I can make for both assembly and C languages is NOP and _nop_() instruction. Is both instructions will take same number of machine cycles?
Thanks, Suresh Kumar Kavula
"The authoritative masquerade very clearly exposed!"
Not really.
All it has shown is that, in one particular case, the for loop just happened to turn out as a simple DJNZ loop.
In general, you can't assume that.
eg, in the example shown, the oprimiser has happened to assign the loop counter to R7 - unrelated changes in the source code could change that, which may or may not affect the loop timing!
One more time: There is absolutely no guarantee whatsoever etc, etc,...
True. But it's a long walk over very thin ice from that to Erik's "nothing could be further from the truth". It's this kind of excessive generalization and his reaction when they're pointed out to him, that so irritates people about Erik.