Hi Sebastien Boivin,
I don't know what the board you are using, if it is the official board, we already have the according LED blink code.
Take LPCXpresso 1347 board as an example, the code can be download from this link:
LPCOpen Software for LPC13XX|NXP
Then the LED blink code is the periph_systick project.
Please check it on your side.
If you want to debug the code, please comment __WFI() in while(1):
About the LCD display library for lpc1347, because this chip don't have the LCD controller, then we don't have the library you need.
Maybe you need to write it by yourself, or refer to the 1602A recommended code.
Have a great day,
Kerry
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