Why your binary will not run on LPC1347 - the missing checksum

So, you've compiled your code and now you have a binary. You've dropped that binary into your LPC1347 / EzSBC2 board, and it won't run. In fact, you get the Mass Storage Controller bootloader popping up.

This is because the bootloader that runs from ROM checks to see if a valid user program is present in flash.

The way it does it is as follows (from LPC1315/16/17/45/46/47 User manual):

21.7 Criterion for Valid User Code
The reserved ARM Cortex-M3 exception vector location 7 (offset 0x0000 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 bootloader 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

If the aforementioned checksum is not valid, your code won't run. When you compile in EmBlocks, it does not put in that checksum.

An easy fix to the problem is a command line tool called LPCRC that will calculate and correct the checksum in your binary. I found it in the tools/ section of the Microbuilder LPC11U/LPC13U Code Base, which is an excellent resource for programming your LPC1347.