LPC Microcontrollers中的主题 Re: Flash loader Corruption

Flash loader Corruption

VishnuBoyapati — Thu, 24 Feb 2022 05:17:02 GMT

My flash loader of LPCXpresso55S69 got corrupted and can I know the process to reconfigure the MCU to the default settings.

Re: Flash loader Corruption

Alice_Yang — Thu, 24 Feb 2022 07:05:29 GMT

Hello,

What do you meaning about " flash loader "? Boot ROM?

How do you know it is corrupted? Can't connect to debug?

Does it can enter ISP mode?

Alice

Re: Flash loader Corruption

VishnuBoyapati — Thu, 24 Feb 2022 07:19:16 GMT

No I mistakenly tried to write to the bootloader using Mcubootloader utility. After that the led connected to the isp isn’t working. One pin to this led is from the mcu and I believe it became open after my write. Yes , I am unable to enter the ISP mode. I want to go back to the default configurations and am unable to do so.

Re: Flash loader Corruption

Alice_Yang — Thu, 24 Feb 2022 09:23:37 GMT

Hello ,

If isp also can't enter, mostly there is no method.

While I'm wonder how do you " write to the bootloader using Mcubootloader utility. "?

Alice

Re: Flash loader Corruption

VishnuBoyapati — Fri, 25 Feb 2022 17:45:21 GMT

I don't have any experience using these boards but i went through the schematics and was able to see that vdd_target is high but the led isn't blinking. Therefore, the line connected to the MCU is open because somehow the configurations of MCU are corrupted and i want to check the conf files which i am unable to. Alice, can u please help me figure out what could be wrong?

Re: Flash loader Corruption

Alice_Yang — Mon, 28 Feb 2022 09:18:54 GMT

Hello ,

Please test as below:

- Pressing ISP button on your board, and connect USB with P6, then release ISP button.

- Open Flash Magic tool, refer to the below link to test whether it can work well.

https://community.nxp.com/t5/LPC-Microcontrollers-Knowledge/Flash-Magic-Programing-LPC/ta-p/1152763

Only need check the part of "1.1 UART ISP Mode Demonstration" .

And you'd better take a video or screenshot show me the steps and result, includes when debug.

Alice

Re: Flash loader Corruption

VishnuBoyapati — Mon, 28 Feb 2022 23:50:42 GMT

I am facing auto baud error with all baudrates.

Re: Flash loader Corruption

Alice_Yang — Wed, 02 Mar 2022 09:20:24 GMT

Open Device Manger, check whether the UART port number is right.

After connect , click ISP-> Read Signature, try more times.

Alice

Re: Flash loader Corruption

VishnuBoyapati — Fri, 04 Mar 2022 18:55:13 GMT

Hi Alice,

I am unable to connect. I believe that I am unable to start the ISP bootloader. Is it possible to have discuss it over a short call?

Thanks,

B. Vishnu

Re: Flash loader Corruption

Alice_Yang — Tue, 08 Mar 2022 04:22:15 GMT

Hello B. Vishnu,

Sorry we do not support call.

You can create a private case if need, https://support.nxp.com/s/

While I think the chip broken, if it can't enter isp mode.

Alice