Hello,
how can I measure the processor load of my code?
I’m working on a seq based on clockbox
so I tried to display the number of clock counters
that need to be processed each tick
but the numbers vary too fast to see any result…
Is there a simulator for the 18F series?
With the µVision IDE at school you can run your program in simulation
to see the runtime of each procedure,
I find such a feature very useful to find bottlenecks in C code…
Hi,
I’m normaly using my scope to measure the performance. A free IO pin is set to 1 when the function starts, and to 0 when it is finished - it gives a good feeling about the processor load. In addition, the scope can display the minimum and maximum pulsewidth.
However, w/o a scope it gets difficult. You could use the integrated simulator of MPLAB, but it requires that you call the function which should be profiled with a correctly initialized memory. Since it is difficult to combine MIOS with the application in order to simulate it completely, you have to add some debugging code, located at 0x0000 (reset vector), which inits the memory and jumps to USER_Tick (not to Tick()) - this ensures, that also the stack pointers are initialized correctly
This debugging code must be removed when you want to upload the application again.
Best Regards, Thorsten.
Ok I will try the scope method
my seq works but the timing is not so stable at the moment…
hi mess…
I thought that might happen when I saw the code… I have picked up a few tips about realtime operation along the way, so just let me know if you want some advice … but I think you’re probably OK without my help 
Hi Stryd,
In the meanwhile most of my code is rewritten, so I will PM you a new version this evening.
My main goal at the moment is to implement the CS and some basic features without optimising any code…
(this should be done in a few days)
When the CS is done it’s optimisation time
I’ve done some simple realtime stuff in the past with a 8051 based school project
see this link (it’s a pong game with a propellor display):
http://users.skynet.be/sky92755/pongwerkt.mov (20MB),
note that the image doesn’t look stable because of my crappy camera
I found it easier to modify the asm output from the Keil compiler than the gcc compiler…
Maybe I should work on my pic18 assembler knowledge a bit, it’s a lot more complicated
then 8051 asm
Any help is REALLY welcome, I’m looking forward to completing this project as soon as possible