PN7462AU Secondary bootloader UART

[mravi]

Hi ,

I was working with PN7462AU OTA referring the document "AN10995
LPC1100 secondary bootloader" application note.I tried porting the secondary bootloader code. I am able to jumb from seconday bootloader to application image area when both images are flashed to corresponding location manually. I have followed the 'interrupt redirection method' specified in the document.

Now I am working on image reception via UART in secondary bootloader side. Since interrupt redirection is there , I need to write this code without using interrupts. I am not able to find any sample code for uart sending and reception without interrupts .

Can anyone help me in this ? 

[m_sedlak]

Hi,

Where did you find out the "vector table offsets" for setting the "redirecting" code? You took EIRQ# from table 28 (UM10858) and used this as offset (meaning, timer0/1/2/3 = 0x00 offset, CLIF = 0x08 offset, etc)? 

Thanks for reply.

Best Regards,

Milan

[sachin_singh]

Hi Midhun V R & Kan_Li,

I am glade to see your Q & A for the secondary boot-loader for the PN7462AU.

From last couple of weeks I am trying to figure out the boot-loader code for PN7462AU.

I am looking for the firmware upgrade using USB.

I need the secondary USB based boot-loader for further firmware upgrades.

So, I would like to request to you that can you guide me for the USB based secondary boot-loader.

Your support is highly appreciative.

Looking forward for your kind support.

Regards

[Kan_Li]

Hi Sachin,

There is an app note on that topic, though it is for LPC, but should also be helpful. Please kindly refer to https://www.nxp.com/docs/en/application-note/AN11732.zip (LPC11U3x/2x USB Secondary Bootloader) for details.

Hope that helps,

Have a great day,
Kan

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[Kan_Li]

From my point of view, polling for the ISR status register in an infinite loop can take place of the ISR, but that is not an efficient way. You may refer to HIF_IRQHandler() for details on the implementation.

Have a great day,
Kan

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[mravi]

I tried this before and it worked . Thanks

Is there any way I could read the flash contents in command line ? GUI flasher tool in IDE dont have flash read back option. Basically I need to know the image I am writing is loading at correct location

[amarayya]

is it possible me to get the example code and testing steps of the same.

[Kan_Li]

I think the memory viewer can be used for that purpose during debug.

Have a great day,
Kan

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