Hi everybody,I develop firmware updating module (via IAP) on LPC2478.
Flash memory is divided into 2 sectors - main (0x0-0x60000) and updater
(0x60000-0x80000). Firstly, new firmware binary is placed into RAM, then
I call the IAP fuctions in loop. After that, I validate the firmware
using ISP, and validator says that everything is correct. But after
restart the device hangs...
Here is my code update function:void UpdateFirmware(){ DWORD irq_buf;
DWORD i=0,j=0; volatile DWORD p=0; BYTE r[BUFFER_SIZE];
irq_buf=VICIntEnable; VICIntEnClr=0xFFFFFFFF;
IAP_PrepareSec(0,18); IAP_EraseSec(0,18);
for(i=0;i<0x600;i++) { memcpy(r,BIG_BUFFER,0x100)
IAP_PrepareSec(0,18); IAP_CopyRAMToFlash(i*0x100,r,0x100); }
VICIntEnable=irq_buf; return; }
Any ideas? Let me mention again, that verification AFTER IAP passes
correctly


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On 18.01.2012 13:57, kunilov wrote:
> ... After that, I validate the firmware
> using ISP, and validator says that everything is correct. But after
> restart the device hangs...

Do you have a correct checksum in the binary. Your flashing tool may calculate
that for you but your update code not, so...

--

Timo
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--- In l..., tike64@... wrote:
>
> On 18.01.2012 13:57, kunilov wrote:
> > ... After that, I validate the firmware
> > using ISP, and validator says that everything is correct. But after
> > restart the device hangs...
>
> Do you have a correct checksum in the binary. Your flashing tool may calculate
> that for you but your update code not, so...
>
> --
>
> Timo
>

Hello, tike64

Thanks a lot for your responce!

How can I check the checksum in the binary? Is it described anywhere? I use hex2bin utility to generate binary from hex file. Has it some options to calculate this checksum?

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On 19.01.2012 08:50, kunilov wrote:
> How can I check the checksum in the binary? Is it described anywhere? I use
> hex2bin utility to generate binary from hex file. Has it some options to
> calculate this checksum?

It is explained in Users' Manual chapter Flash memory programming firmware,
30.5.1.1. in my version.

I don't know about hex2bin utility - sounds like so generic that probably it
doesn't know anything about LPC2K.

For example, IIRC, openocd complains about wrong checksum but kindly writes a
correct one.

--

Timo
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Millions of thanks, tike64! It works!

There is a checksum on address 0x14. It is complement to zero of interrupt vectors sum. You must set it manually in binary file. Interrupt vector table is situated at first 32 bytes.

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