The LPC/LPC are based on a 16/32 bit ARM7TDMI-S™ CPU with real- time emulation and embedded trace support, together with / kilobytes. Please note: From FreeRTOS V the demo presented on this page has switched from using the old (and discontinued) Keil DKARM compiler to instead use. p = (int*)0x;. *p = 0xbadc0de;. invalidate_dcache_all();//by set/way. a = *((int*)0x);. I think a!=0xbadc0de,because.

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What value should I keep in place of xxxxx to generate a one milli second delay. I donot want to use the timer functionality. It will be ok using the NOP instruction, but please guide me what should be done to generate the one milli second delay in place of second for arrm7. In fact, for delays on the order of millisecondsit is probably a bad idea to busy-loop at all!


Configure a timer, read out the timer value and poll it until x ms have passed. This is trivial, and will not be affected by changes of compiler optimizations, changes of flash caching etc. I really got aware of this probem with -O3 optimization as it may unroll loops.

If you REALLY don’t want to use timer, use the method supplied above to write assembly code and then use an ouptut to measure code duration with a scope. Lpcc2129 code looks like typical student code. Lpc219 site uses cookies to store information on your computer. By continuing to use our site, you consent to our cookies.

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I wonder if it is really Keil code. Important information This site uses cookies to store information on your computer.

NXP (founded by Philips) LPC2129

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I want to lpc22129 a delay function this way: Thank you dudes in advance for the reply. Andrew Neil Oh no, not this old chestnut again! The answer is simple.

You should not do a counted software delay.

ARM7 and LPC tutorial

And where does it come from? C And who supplies it?

I also say it, and I suspect there is more I wonder if it is really Keil code Andrew Neil Yes, there is certainly Keil code that does it – Lcp2129 think most of their “Blinky” examples do!