Hi all,
I am using LPC2364 processor and implemented UART ISR.Its working fine.I have to disable UART interrupts before go to Powerdown mode and reenable it again after wake up from powerdown mode.For that i am using following code

Disable:
Clear UART bit in PCONP
then UxIER = ox00;
ClrInterruptSource = UxIIR | UXRBR |UxLSR;
Leave VIC Interrupt setting as it is.

ReEnable:

Set UART PCONP bit.
UxIER = 0x07;

Issue: First i disabled.then go to powermode.
Reenable it after wakeup from Powerdown.

After reenabled uart interrupts,i didnt get any UART interrupts.
but Program not hangs anywhere.If i missed any info let me know???
Do i have to follow any steps for enable and disable uart???

Thanks

Start a New Thread

Did you check that global arm interrupts are enabled after wakeup?

On Sun, Jan 31, 2010 at 3:47 AM, wrote:

> Hi all,
> I am using LPC2364 processor and implemented UART ISR.Its working fine.I
> have to disable UART interrupts before go to Powerdown mode and reenable it
> again after wake up from powerdown mode.For that i am using following code
>
> Disable:
> Clear UART bit in PCONP
> then UxIER = ox00;
> ClrInterruptSource = UxIIR | UXRBR |UxLSR;
> Leave VIC Interrupt setting as it is.
>
> ReEnable:
>
> Set UART PCONP bit.
> UxIER = 0x07;
> Issue: First i disabled.then go to powermode.
> Reenable it after wakeup from Powerdown.
>
> After reenabled uart interrupts,i didnt get any UART interrupts.
> but Program not hangs anywhere.If i missed any info let me know???
> Do i have to follow any steps for enable and disable uart???
>
> Thanks
>
>
> Start a New Thread

Yes.Other Interrupts works fine like RTC interrupt.

________________________________
From: scott nichols
To: l...
Sent: Sun, 31 January, 2010 9:24:12 PM
Subject: Re: [lpc2000] LPC23xx UART Issue :Disable Uart Interupts and reenable it again

Did you check that global arm interrupts are enabled after wakeup?
On Sun, Jan 31, 2010 at 3:47 AM, wrote:

>
> >>>
>
>Hi all,
>> I am using LPC2364 processor and implemented UART ISR.Its working fine.I have to disable UART interrupts before go to Powerdown mode and reenable it again after wake up from powerdown mode.For that i am using following code
>
>>Disable:
>> Clear UART bit in PCONP
>> then UxIER = ox00;
>> ClrInterruptSource = UxIIR | UXRBR |UxLSR;
>> Leave VIC Interrupt setting as it is.
>
>>ReEnable:
>
>>Set UART PCONP bit.
>> UxIER = 0x07;
>>Issue: First i disabled.then go to powermode.
>> Reenable it after wakeup from Powerdown.
>
>>After reenabled uart interrupts,i didnt get any UART interrupts.
>>but Program not hangs anywhere.If i missed any info let me know???
>>Do i have to follow any steps for enable and disable uart???
>
>>Thanks

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Do you need to re-start the PLL after power-down mode? Just a guess.

Start a New Thread

Yes.i have restarted PLL after wakeup from Power down mode.

________________________________
From: brian_myers888
To: l...
Sent: Tue, 2 February, 2010 12:01:08 AM
Subject: [lpc2000] Re: LPC23xx UART Issue :Disable Uart Interupts and reenable it again

Do you need to re-start the PLL after power-down mode? Just a guess.

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