LPC MicrocontrollersのトピックLPCXpresso51U68 Bootloader?

LPCXpresso51U68 Bootloader?

oscarniño — Mon, 03 Jun 2019 22:51:24 GMT

Is there any example about LPC51U68 bootloader?

Thanks

Best Regards

Re: LPCXpresso51U68 Bootloader?

ZhangJennie — Tue, 04 Jun 2019 01:00:53 GMT

Hi Oscar Niño ,

LPC51U68's ROM have bootloader support update frimware through USB, UART, SPI, I2C, etc. Isn't that enough?

If you want to develop secondary bootloader, we don't have exact demo code for this chip. But you may refer to SBL on LPC11U68. As I know, there is an AN12037 about SBL based on USB on lpc11Uxx.

https://www.nxp.com/docs/en/application-note/AN12037_LPC11U6x.zip

Have a great day,
Jun Zhang

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Re: LPCXpresso51U68 Bootloader?

oscarniño — Tue, 04 Jun 2019 01:30:44 GMT

Hi ZhangJennie

That's the question where can I found the examples? I have check SDK for LPCXpeesso51U68 and I couldn't found them, what's their names? Thank you.

Best Regards

Re: LPCXpresso51U68 Bootloader?

ZhangJennie — Tue, 04 Jun 2019 02:11:08 GMT

Oscar,

What sample code do you mean? LPCXpeesso51U68 SDK doesn't include boot demo.

ROM boot code is burned when it is out of factory. and the source code is not open to public.

The secondary bootloader source code is open to user. it is included in AN12037, you can download it from the link I posted above.

Have a great day,
Jun Zhang

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Re: LPCXpresso51U68 Bootloader?

oscarniño — Tue, 04 Jun 2019 02:52:28 GMT

Hi ZhangJennie

Maybe I'm confused, I think bootloader that you are talking about is for LPCXpresso51U68 board, but whats happend when microcontroller is used in my own board? Because this MCU is for remplace and Atmel MCU from a finished project and the only thing that is missing is the bootloader. Maybe I'm not getting it clear. Could you please give me an extended explanation?

Best Regards

Re: LPCXpresso51U68 Bootloader?

ZhangJennie — Tue, 04 Jun 2019 03:46:55 GMT

Oscar

I talked two types of bootloaders. both of them work for chip. the boot code is stored on chip ROM/Flash. For sure you can verify them on our LPCXpresso51U68 demo board.

Have a great day,
Jun Zhang

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Re: LPCXpresso51U68 Bootloader?

oscarniño — Tue, 04 Jun 2019 15:14:32 GMT

Hi ZhangJennie

Ok, so If I understood well, every chip(not just in evaluation board) has bootloader by factory. If it is correct how can I implement it? Is there an application note about it? Or where can I find information about it? For example: how to use I2C BL, how to use UART BL, etc. Thanks a lot.

Best Regards

Re: LPCXpresso51U68 Bootloader?

PabloBaena — Tue, 04 Jun 2019 15:30:50 GMT

Hi Oscar,

You can refer to following link for the official bootloader's site, check "Documentation" section on top tabs.

MCU Bootloader | NXP

Regards.

Re: LPCXpresso51U68 Bootloader?

ZhangJennie — Wed, 05 Jun 2019 04:14:49 GMT

Yes, every chip has bootloader by factory. in order to use on chip bootloader, the chip must be in ISP mode. you can read reference manual chapter 3 boot process.

FlashMagic is a good tool bootloader GUI. You can refer help manual of Flash Magic - Welcome

Have a great day,
Jun Zhang

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