ColdFire/68K Microcontrollers and Processors中的主题 COLD FIRE

COLD FIRE

rao — Tue, 11 Apr 2006 13:45:13 GMT

Hai all,

Can anybody sedn an example code which explains the usage of general purpose timer module in mcf5282.

Please include initialization of various memories like SDRAM ,IPSBAR etc..

Thanks in advonce.

Re: COLD FIRE

mpeters — Tue, 11 Apr 2006 22:46:14 GMT

Rao,

Sample code that shows all of the initialization of the processor, memories, etc., can be downloaded from the MCF5282 product summary page. It is located in the "Software" section, and the link is entitled "MCF5282SC". Here is the link to the MCF5282 product summary page:
http://www.freescale.com/webapp/sps/site/prod_summary.jsp?code=MCF5282&nodeId=0162468rH3YTLC00M95448

We don't have any code specifically for the GPT on the MCF5282, however attached is some code that was written for the GPT on the MCF5213. The MCF5282 and MCF5213 use the same GPT module, so this is a good reference and the code should be helpful to you.

Regards,
mpeters

Message Edited by mpeters on 04-11-2006 10:55 AM

Re: COLD FIRE

rao — Wed, 12 Apr 2006 10:09:05 GMT

Thank you Mr Mpeters.

Re: COLD FIRE

rwehrli — Tue, 15 May 2007 03:47:19 GMT

mpeters,

Do you also happen to have PIT timer sample code? I've been able to configure the timer, but haven't been able to get it to produce an interrupt on the M5211DEMO board using CW 6.4.

In my mcf5xxx_vectors.s I have at the top:

.extern IRQ_PIT0

...nothing else changed until...

vector055: .long IRQ_PIT0

In main.c I have:

void IRQ_PIT0( void )
{
printf( "IRQ_PIT0\r\n" );
}

And, interestingly, if I don't make a call to it in main, IRQ_PIT0 is never linked as a defined symbol, as shown in the produced map file.

So, I put a call to it at the top of main, found it my linker map, but still no interrupt.

MCF_PIT0_PCSR = 0x023B;
MCF_PIT0_PMR = 0x0040;

...is my current PIT0 configuration. Perhaps I've got things improperly configured?

Is there some other method of configuring interrupt handlers that I haven't yet figured out? I've only had about 3 hours with this board.

Take Care.

Rob!

Re: COLD FIRE

mccPaul — Tue, 15 May 2007 16:22:55 GMT

Look at the code I posted in this thread http://forums.freescale.com/freescale/board/message?board.id=CFCOMM&message.id=2192 and here http://forums.freescale.com/freescale/board/message?board.id=CFCOMM&message.id=2100 for examples and discussion that may be useful.

This is specifically aimed at the mcf5282, but the timers are very similar, if not identical between the Coldfire parts, just check the manual if you aren't using the 5282.

Paul.