DFU mode without using boot pins and reset

[Anusha1]

Hi, I am using the LPC4367 board, I have uploaded the LPCopen3.02 dfu composite code into the target, once I plug into target USB it is showing as per the attached image in the device manager.

When I open LPCscrypt and give boot_lpcscrypt.cmd, I am getting the following error

Invalid DFU suffix signature
A valid DFU suffix will be required in a future dfu-util release!!!

Cannot open DFU device 1fc9:0089
No DFU capable USB device available

Can anyone help what is the solution?

Thanks in Advance

[ZhangJennie]

According to the readme file of this demo, to test DFU download feature of the example. Use the dfu-util.exe available in MCUXpresso IDE install folder.

Can you please try to test it with dfu-util.exe?

[Anusha1]

Hi, I tried to download and got this error, Is there somewhere I am going wrong? 

kindly give me some suggestions

Thanks in Advance

[Anusha1]

Hi, thank you for the response, we tried dfu-util.exe as u suggested and we got the following error.

[ZhangJennie]

Please let me know what application (or project name) do you work with this part? We will check it further.

[Anusha1]

Hi ZhangJennie,

We are developing a projector with a computing system, By default, the MCU and Host connected with the USB interface in the PCB.

Our Requirement needs to update the firmware in the field if any update needs to be done online. 

So we are trying to update the firmware using LPC open, usbd_rom_dfu_compsite example but we got an error as mentioned in the above post.

Please help us to resolve this issue.

[ZhangJennie]

I reproduced your issue with this demo code on my side.

I checked it internally with other team, it is confirmed there is problem. 

I have reported it. If any feedback, will let you know.

[Anusha1]

Hi,

Did you get any feedback regarding the LPCopen dfu_composite example error?

any updates please let me know, Is there any example for dfu other than the LPCopen, we are waiting for your reply, the dfu code has been pending in our development  

kindly someone replies as soon as possible

Thanks in Advance

[Anusha1]

Hi ZhangJennie 

Thanks for your response, Is there any user code to enter ISP mode for LPC4367 without making P2.7 low or any reset.

Or Is there any example to update firmware online in the field without any hardware changes or any reset?

[bernhardfink]

Did you check my recently provided example?

LPC1857 jump to USB/DFU bootloader from the application

Can't say for sure if the LPC4367 is supported, but if not this would solvable.

Regards,
Bernhard.

[Anusha1]

Hi ZhangJennie 

Any updates regarding that example code?

[ZhangJennie]

We have AN12037

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

it's not for your part but you can refer it to develop your code.

Have a nice day,

Jun Zhang