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lpc1343 mass storage problem

enore grattoni

I had this problem with lpc1343
if I work with ULINK2 there is no any problem.
If I try to update through USB mass storage bootloader, program is not working.
I analyse the condition and I arrive to this.

Interrupt vector 7 (reserved in assembler file) is the check sum of first 0-6 interrupt vector.
I didnt find this in bin and hex file so this made hex file and bin file not correct for bootloader.

I program a board and after I copy file firmware.bin (after a programming with ULINK2) and this file was correct and useful for programming of LPC1343.

Keil version is 4.23.

Any tips?

Regards

Grattoni Enore