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Dear friends,

quoted from LPC1768 user mannual:
"The reserved Cortex-M3 exception vector location 7 (offset 0x 001C in the vector table)
should contain the 2's complement of the check-sum of table entries 0 through 6. This
causes the checksum of the first 8 table entries to be 0. The boot loader code checksums
the first 8 locations in sector 0 of the flash. If the result is 0, then execution control is
transferred to the user code."

How flash magic calculates the checksum of these entries nad its two's complement? I do the calculation, but mine is different than what flash magic offers.

I would say it is a connection problem. check them again.
Or probably you are using a wrong com port. check to see if you choose the same com port as your microcontroller is connected to the computer

Dear friends, Hello.

I am a software developer of ARM-LPC MCUs and I have written many C-based applications for embedded systems. In my new project I need to come out of C a little and start developing a custom application with C# (or any other language) that does a part of Flash Magic job.

I need to read a hex file and put it in the flash memory of an LPC1768 microcontroller. I mean I need a custom program to be able to "flash program" the LPC1768 using ISP.

I would really appreciate if you helped me figure out where to start.
With warm regards