8-bit MicrocontrollersのトピックNewbie - definition watch and delay

Newbie - definition watch and delay

RichT — Tue, 20 Jun 2006 04:24:42 GMT

I've just got myself a demo9s08qg8 board and it looks just dandy, I'm having a couple of problems though and wondered if someone could help?

I've got some definitions set up such as;

#define SW1 PTAD_PTAD2

so I can refer to SW1 which works fine, but how can I watch this while debugging? Seems it won't let me add user definitions to the data watch window?

Also, I just set up a simple delay function for roughly 500mS. Is there a trace time function in CW or some way of setting the delay exactly?

sorry for the dumb questions

Thanks

Rich

Re: Newbie - definition watch and delay

RaghuSorab — Tue, 20 Jun 2006 19:33:15 GMT

Hello Rich,

If its a 500 ms Delay, you can just find the exact time by analyzing the instructions you use and flow of the program ( ex How many times a particular instruction is executed ).

Reciprocal of the bus frequency is the time for one Cycle.

If an instruction uses 3 cycles, time taken for execution is (3 * time for one Cycle ).

I dont know much about the IDE method to calculate.

Raghu Sorab

Re: Newbie - definition watch and delay

RichT — Tue, 20 Jun 2006 20:00:53 GMT

Raghu

Thanks, thats much as I thought, though I would have thought something as 'sophisticated' as CW would have trace time functions etc built in. (MPLAB has a nice stopwatch function which does similar too)

Does anyone know how to set up a watch for SW1 after using #define SW1 PTAD_PTAD2? I don't want to have to scroll through the data window looking for the port pin, I just want to add SW1 to the data2 window etc. It would be fine doing it the hard way for just one or two pins, but not lots. I just get an error

Thanks

Rich

Re: Newbie - definition watch and delay

alex_spotw — Tue, 20 Jun 2006 23:42:25 GMT

Hi:

For the 500ms delay, I would suggest using the Timer to generate precise delays, instead of counting instruction cycles, which is very tedious and inprecise.

Use Processor Expert to create a TimerInt bean fixed at 500ms or variable according to yout needs.

Regards,

Alex

Re: Newbie - definition watch and delay

RichT — Wed, 21 Jun 2006 00:57:33 GMT

Alex

>Use Processor Expert to create a TimerInt bean fixed at 500ms

hhhm. I'll have to have a read up on these. Thanks

Any ideas on the watch window?

Rich