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I am still hoping someone can educate me on what I get when purchasing the C51 development package. After reviewing the online manuals, it appears that the libraries supplied are rather limited. For instance, I see no reference to a library that will support the standard time.h functions. Is this correct? It appears that the ARM development toolset has time.h libraries but not C51. I would appreciate someone informing me of whether these additional libraries may be obtained directly from Keil or do I need to contact a third-paty?
Thanks Jim
Did you read the reply to your previous post?
http://www.keil.com/forum/64352/
As noted there, the 8051 really is a very old, limited, simple microcontroller. The limitations of the Keil C51 toolchain are driven directly by these fundamental limitations of the underlying architecture. So, if you're thinking of using stuff from time.h, the 8051 is probably not a good choice.
Keil C51 is very much focussed on the type of small-microcontroller, constrained-resource projects which are (were) ideal for the 8051 - as opposed to "Hosted" systems, where time.h et al really come into play.
As already noted, probably best to use Keil's sa1es contacts to discuss your requirements in detail...
"What kind of development in 2019 really focuses on the 8051"
Indeed! Especially as this sounds like a new development - so not constrained by historical issues ...
As noted in the other thread:
"Compilers from Keil are conforming freestanding implementations of the C Programming Language"
http://www.keil.com/product/isoansi.asp
where it also says:
"A conforming freestanding implementation shall accept any strictly conforming program that does not use complex types and in which the use of the features specified in the library clause is confined to the contents of the standard headers: <float.h>, <iso646.h>, <limits.h>, <stdarg.h>, <stdbool.h>, <stddef.h>, and <stdint.h>. A conforming implementation may have extensions (including additional library functions), provided they do not alter the behavior of any strictly conforming program."