I've just found the first (of many) error(s) in the official library LPC804-EX-CODE-MCUXPRESSO.zip. I fixed it and I decided to create a fork on BitBucket in order to publish my fixes. You're welcomed to visit the repo at:
https://fjrg76@bitbucket.org/fjrg76/lpc8xx.git
You can also clone it directly:
git clone https://fjrg76@bitbucket.org/fjrg76/lpc8xx.git
If you find some error please let me know it.
Happy codding!