topic Re: LPC1768 wake up from DeepSleep when bootloader is present in LPC Microcontrollers

LPC1768 wake up from DeepSleep when bootloader is present

laurianussss — Tue, 18 Mar 2025 06:44:54 GMT

I have a cusotm board with LPC1768 and I need to use deep sleep mode. Everything works OK as default but when I install a bootloader and the main program where I need to use deep sleep has an offset, when I wake up the MCU it clear ctach teh IRQ and wake up as current increased it remains stucked somewhere... possible goes on a wrong address. I do nto know how to debug as debuger does not work in deep sleep.

Any idea?

Re: LPC1768 wake up from DeepSleep when bootloader is present

Habib_MS — Tue, 18 Mar 2025 22:27:02 GMT

Hello @laurianussss,
Could you execute the Bootloader application and the low power mode independently? this with the propose of corroborate that both work as expected.

Also, I highly recommend see the 4.8.2 called " Deep Sleep mode" in order to obtain more information about low power mode.

BR
Habib

Re: LPC1768 wake up from DeepSleep when bootloader is present

laurianussss — Wed, 19 Mar 2025 01:27:44 GMT

Yes... aplicatiopn was aorking independently. Anyway I found the problem and solution. Only need it to add Offset address when reainitialize the clock

SCB->VTOR = ADRE_OFFSET & 0x3FFFFF80;

Thank you