to set a pin value

but pinsel0 is not the same as PINSEL0_bit - is it?!

Even disregarding the uppercase/lowercase difference, they are not the same - are they?

If the compiler tells you that something is "not defined" then that is the case!

To be more specific, the compiler could be verbose and say, "no valid definition exists at this point".

So, if you think you have a definition, you must check that it is both valid and that it is visible at the point where you're trying to use it.

Note that this is standard 'C' stuff - nothing specifically to do with Keil, or ARM, or embedded...

but pinsel0 is not the same as PINSEL0_bit - is it?!

Even disregarding the uppercase/lowercase difference, they are not the same - are they?

If the compiler tells you that something is "not defined" then that is the case!

To be more specific, the compiler could be verbose and say, "no valid definition exists at this point".

So, if you think you have a definition, you must check that it is both valid and that it is visible at the point where you're trying to use it.

Note that this is standard 'C' stuff - nothing specifically to do with Keil, or ARM, or embedded...

how to set a single pin in a port to high and low

Your code cannot do anything until it builds successfully!

To find out how to use the specific features of a specific chip, you need to refer to the Documentation for that chip; ie, the Datasheet, User Manual, and any application notes, examples, etc , provided by the manufacturer.

Note that Keil also supply a large selection of examples: http://www.keil.com/download/

For general programming books, see: http://www.keil.com/books/

The discussion is somehow moved to the below thread:
http://www.keil.com/forum/docs/thread16563.asp

The "somehow" is because you started asking new questions and supplying new information in that thread!

D'oh!

Hi Andy,

Sorry for that.

this is the first time i am asking thread

that why

i donot know how to stop it

come to our point

to set port pin P0_22 to 1 or 0

i am using lpc2129 controller and realviewarm software

please help me

OK, to bring it all together, here is the information that you need:

First, you need to be competent with the 'C' programming language. If you don't already know 'C', it may well be easier to start by learning it on a PC.

There are books about programming here: http://www.keil.com/books/

Next, you need to study the Documentation for your particular chip; that is, its Datasheet and/or User Manual and other supporting documentation (application notes, tutorials, examples, etc) from the manufacturer.

You also need to study the Documentation for your board, and tools.

You cannot program the chip before you understand how it works, and how the tools work!

You might also want to look at the Hitex "Insider's Guidde": www.hitex.com/index.php

Check this link:
" href= "http://ics.nxp.com/support/documents/microcontrollers/zip/code.bundle.lpc213x.lpc214x.realview.zip"> ics.nxp.com/.../code.bundle.lpc213x.lpc214x.realview.zip

Search for a directory named "GPIO" in the Sample Code Bundle, then study it!

But note that samples serve to illustrate things - you will need a basic foundation before you can understand the illustrations!