topic Re: LPC1768 doesn't start at power-up in LPC Microcontrollers

LPC1768 doesn't start at power-up

Lena — Tue, 06 Apr 2021 10:11:05 GMT

I'm using a MCUXpresso to write software for a LPCXpresso1769 board. I've inserted code to blink the RGB led at startup in a distinct pattern.

I can compile and download the code to the board using the IDE, and I see the LED blink its pattern. However, I can't seem to get the board to run its code after power-up, without the help of the MCUXpresso IDE - it just sits there with the RGB LEDs colors lit up constantly.

How would I have to treat the board so that it runs the code I flashed onto it after power-on? I'm supplying power through the attached NP-Link board's micro-USB port.

Best regards,

Lena

Re: LPC1768 doesn't start at power-up

converse — Tue, 06 Apr 2021 11:19:38 GMT

Are you using the semihosting C library? If so, you need a debugger connected.

Try switching the C library to a NoHost version:

https://community.nxp.com/t5/LPCXpresso-IDE-FAQs/Switching-the-selected-C-library/m-p/473669

Re: LPC1768 doesn't start at power-up

Lena — Tue, 06 Apr 2021 11:45:15 GMT

I set up the project again, and now it works. Strange, now we'll never find out what I did wrong ....