topic Re: LPC1830 Hang-up after Reset with RESET_CTRL0 register in LPC Microcontrollers

LPC1830 Hang-up after Reset with RESET_CTRL0 register

kensu — Tue, 09 Jan 2018 02:57:56 GMT

I reset LPC1830 with RESET_CTRL0 register, I use CORE_RST or MASTER_RST to reset.

But sometimes LPC1830 will hang up after Reset.

Before I reset LPC1830, I will reset another IC by I2C interface.

It's hard to debug why LPC1830 hang up after reset, but I did some experiment.

If I add some delay before LPC1830 SW reset. It will not hang up.

Or I use __DSB() before LPC1830 SW reset. I will not hang up.

It seems that LPC1830 is unstable before reset if I didn't call __DSB() or add some delay.

I search some forum "NVIC_SystemReset(void" is suggest method, but it will cause LPC1830 hang up.

Does the __DSB() be suggested function before SW reset?

Thanks

Ken

Re: LPC1830 Hang-up after Reset with RESET_CTRL0 register

jeremyzhou — Wed, 10 Jan 2018 06:31:00 GMT

Hi Ken Su,

Thank you for your interest in NXP Semiconductor products and 

for the opportunity to serve you.

I was wondering if you can introduce the testing process in details and the probability percent of hang-up after reset during the testing.

Whether you can share the demo code, as I want to replicate the phenomenon on my site.

I'm looking forward to your reply.

TIC
 
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