IAP_CopyRamToFlash undocumented error code

[manderson107]

Greetings,

I am working with an LPC54608.  I am calling IAP_CopyRamToFlash to reprogram flash.  Every page successfully writes except for page 0 of the flash.  I get an error code 10221.  102 kStatusGroup_IAP does not have a code 21 documented in the header files or the user manual for the processor.

Can someone help me understand this error code from the ROM IAP function?

Thanks.

[xiangjun_rong]

Hi,

I suppose that you call the IAP_CopyRamToFlash() in application code, furthermore you allocate the application in the flash memory from 0x0000_0000, especially the interrupt and Reset vectors are located at 0x0000_0000, the page 0 is at the address 0x0000_0000, if you erase page0, the application code is destroyed, interrupt/Reset vectors are destroyed, you application code can not run in the case. that is why I suppose you can not erase page 0.

Hope it can help you

BR

XiangJun Rong

[manderson107]

Thanks for your prompt response.

Actually.  The error code documentation in UM10912 5.6.15 led me astray.  21 = 0x15 which is a user code checksum error.  Our executable that we were writing into the flash did not have checksum applied.  Calling the checksum command on the final binary solved our problem.

checksum -p LPC54608 -d our.bin

https://community.nxp.com/t5/LPC-Microcontrollers/LPC546xx-iap-write-returns-undocumented-error-code...