hi
thanks

I'm using all 16 match interrupts of 4 timers to generate 16 square wave signals.. I'm getting square waves from timer2 and timer3 i.e 8 waves are good....but timer0 and timer2 are not working when timer2 and 3 active...

what can be done

Arun
________________________________
From: rtstofer
To: l...
Sent: Monday, 1 April 2013 12:23 AM
Subject: [lpc2000] Re: square wave generation

--- In l..., arun wrote:
>
> what I'm trying to say is, the smaller version of the program works... it is only the complete program thats not working
>
> Â
> Arun

So, cut the code back to the part that works and then add the new stuff in very small pieces until you see what makes it fail.

Even if half of the code worked, it's still too much to deal with in a forum like this. Most of the problems that get resolved here start out around 20 to 30 lines.

Add diagnostic outputs: LEDs or printf(). Try to make it easy to see what is happening. Printf() won't be helpful inside timing loops or interrupt handlers but toggling an IO pin works well when viewed with a scope. By definition, only one function (or interrupt handler) is running at any given time. Assign each a unique number and put it out on some IO pins when the function starts. You can look at it with a logic analyzer if one is available. When you enter an ISR, you want to save the function number that was running, output the new function number and then, just before returning, restore the previous number. This will give you a perfect trace of the code execution. Make sure you store the previous function number in a variable that is local to the ISR. That way if the function is invoked recursively, the trace won't be lost. Or create a stack like structure and just stack the function numbers.

Richard

An Engineer's Guide to the LPC2100 Series

--- In l..., arun wrote:
>
> what I'm trying to say is, the smaller version of the program works... it is only the complete program thats not working
>
>
> Arun

So, cut the code back to the part that works and then add the new stuff in very small pieces until you see what makes it fail.

Even if half of the code worked, it's still too much to deal with in a forum like this. Most of the problems that get resolved here start out around 20 to 30 lines.

Add diagnostic outputs: LEDs or printf(). Try to make it easy to see what is happening. Printf() won't be helpful inside timing loops or interrupt handlers but toggling an IO pin works well when viewed with a scope. By definition, only one function (or interrupt handler) is running at any given time. Assign each a unique number and put it out on some IO pins when the function starts. You can look at it with a logic analyzer if one is available. When you enter an ISR, you want to save the function number that was running, output the new function number and then, just before returning, restore the previous number. This will give you a perfect trace of the code execution. Make sure you store the previous function number in a variable that is local to the ISR. That way if the function is invoked recursively, the trace won't be lost. Or create a stack like structure and just stack the function numbers.

Richard

what I'm trying to say is, the smaller version of the program works... it is only the complete program thats not working

Arun
________________________________
From: arun
To: "l..."
Sent: Sunday, 31 March 2013 11:51 AM
Subject: [lpc2000] Re: square wave generation

ok..

but

the program with 8 square wave output (which is about half the size of this program) works....
though this is just an extension of the same program which uses 4 timers instead of 2 does not work...

Arun

ok..

but

the program with 8 square wave output (which is about half the size of this program) works....
though this is just an extension of the same program which uses 4 timers instead of 2 does not work...

Arun

--- In l..., arun wrote:
>
> Some one please help..
>
> Arun
You posted a file containing 773 lines of code (including blank lines and comments). NOBODY is going to try to wade through that much code!

If you posted something like 20 lines of code, maybe someone would dig through it. For example, why bother with code for all the motors when none of the motors work? Why have several interrupt handlers when none of them work?

Nowhere in all of that code is there any comment about what is supposed to happen. There are quite a few low level comments but nothing describing the 'big picture'.

I'm not sure anybody wants to put that much time into understanding your project. Cut it down to the bare minimum. Twenty or thirty lines MAX. BTW, programs are usually written that way as well. First you get a little thing to work, then you get a bigger thing to work.

Richard

Some one please help..

Arun
________________________________
From: arun
To: "l..."
Sent: Saturday, 30 March 2013 12:42 AM
Subject: Re: [lpc2000] Re: square wave generation

Hi

I included all the PINSEL's and tried but still no output.

Arun

________________________________
From: Kevin
To: l...
Sent: Monday, 18 March 2013 6:56 PM
Subject: [lpc2000] Re: square wave generation

I took a quick look at the code you uploaded and I think you forgot to do some PINSEL's.
And never trust a simulator.

--
Kevin

--- In l..., "arun" wrote:
>
> Hi,
>
>
> I am using LPC2368 to generate 16 square waves of independent frequency. The program works well in simulation but there are no square waves generated in hardware. UART0 is used to get values which determines frequency of each wave. Please help. I'll upload the program file named 4timers.c
>

Hi

I included all the PINSEL's and tried but still no output.

Arun
________________________________
From: Kevin
To: l...
Sent: Monday, 18 March 2013 6:56 PM
Subject: [lpc2000] Re: square wave generation

I took a quick look at the code you uploaded and I think you forgot to do some PINSEL's.
And never trust a simulator.

--
Kevin

--- In l..., "arun" wrote:
>
> Hi,
>
>
> I am using LPC2368 to generate 16 square waves of independent frequency. The program works well in simulation but there are no square waves generated in hardware. UART0 is used to get values which determines frequency of each wave. Please help. I'll upload the program file named 4timers.c
>

This code can generate signals of different duty cycle....
But i need different frequencies, and i need 16 such outputs...
Thanks anyway...

Arun
________________________________
From: Dan Abc
To: "l..."
Sent: Thursday, 21 March 2013 6:20 AM
Subject: Re: [lpc2000] square wave generation

email list test

________________________________
From: Dimitriy irtos
To: l...
Sent: Wednesday, March 20, 2013 2:07:25 PM
Subject: Re: [lpc2000] square wave generation

Please look at this
linkand
reply Do you need this example working on LPC?!

I can compile it with gcc for you for LPC2368 and give a project.

2013/3/18 arun

> **
> Hi,
>
> I am using LPC2368 to generate 16 square waves of independent frequency.
> The program works well in simulation but there are no square waves
> generated in hardware. UART0 is used to get values which determines
> frequency of each wave. Please help. I'll upload the program file named
> 4timers.c
>
> --
CMake build environment project
for micro-controllers (use
it or
addyou
favorite MCU )

Thanks for the response...
I can access the chip only after few days..
I'll test and then post about the output..

Arun
________________________________
From: Kevin
To: l...
Sent: Monday, 18 March 2013 6:56 PM
Subject: [lpc2000] Re: square wave generation

I took a quick look at the code you uploaded and I think you forgot to do some PINSEL's.
And never trust a simulator.

--
Kevin

--- In l..., "arun" wrote:
>
> Hi,
>
>
> I am using LPC2368 to generate 16 square waves of independent frequency. The program works well in simulation but there are no square waves generated in hardware. UART0 is used to get values which determines frequency of each wave. Please help. I'll upload the program file named 4timers.c
>

email list test

________________________________
From: Dimitriy irtos
To: l...
Sent: Wednesday, March 20, 2013 2:07:25 PM
Subject: Re: [lpc2000] square wave generation

Please look at this
linkand
reply Do you need this example working on LPC?!

I can compile it with gcc for you for LPC2368 and give a project.

2013/3/18 arun

> **
> Hi,
>
> I am using LPC2368 to generate 16 square waves of independent frequency.
> The program works well in simulation but there are no square waves
> generated in hardware. UART0 is used to get values which determines
> frequency of each wave. Please help. I'll upload the program file named
> 4timers.c
>
> --
CMake build environment project
for micro-controllers (use
it or
addyou
favorite MCU )