topic Re: Cannot enter debug mode after entered power down mode in LPC Microcontrollers

Cannot enter debug mode after entered power down mode

leechen — Thu, 21 Jun 2018 06:50:40 GMT

As soon as I entered power down mode without any method of waking the board up, I cannot enter the debug more anymore. How can I solve this?

my code as follow:

int main(void)
{
SystemCoreClockUpdate();
Board_Init();
SysTick_Config(SystemCoreClock / TICKRATE_HZ);
ProcessPowerState(PMU_MCU_POWER_DOWN);

}

Re: Cannot enter debug mode after entered power down mode

victorjimenez — Fri, 22 Jun 2018 14:44:34 GMT

Hello Lee Chen,

Please refer the following community post: Regaining debug access to target MCU

You need to recover the debug access to the MCU. That community post explains how to do this.

Hope it helps!

Victor.

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Re: Cannot enter debug mode after entered power down mode

shaheenshamshad — Tue, 28 Aug 2018 09:30:36 GMT

Hello Victor,

I tried the given solutions in the above link but none worked for me.

I am using LPC54618 MCU and LPCXpresso IDE.

Is there some other way to come out of this problem?

regards,

Re: Cannot enter debug mode after entered power down mode

victorjimenez — Tue, 28 Aug 2018 14:30:11 GMT

Hello Lee Chen,

Did you put your MCU in ISP mode following the steps mentioned in the community post I put before? Once you are in ISP mode you should be able to launch the debug session without any problem.

Also, I recommend you to use MCUXpresso IDE since in our newest IDE instead of LPCXpresso.

Link to MCUXpresso IDE

Regards,

Victor.

Re: Cannot enter debug mode after entered power down mode

shaheenshamshad — Wed, 29 Aug 2018 05:52:48 GMT

Hello Victor,

Yes it worked.

LPC54618 has three ISP pins so I connect it to GND and followed the instruction mentioned in this https://community.nxp.com/thread/389112 .

Thank you.

regards,