Overview
========
The GPIO Example project is a demonstration program that uses the KSDK software to manipulate the general-purpose
outputs. The example use LEDs and buttons to demonstrates GPIO API for port and pin manipulation (init, set,
clear, and toggle).



Toolchain supported
===================
- IAR embedded Workbench  8.50.1
- Keil MDK  5.30

Hardware requirements
=====================
- Micro USB cable
- LPCXpresso54018 board
- Personal Computer

Board settings
==============
No special settings are required.

Prepare the Demo
================
1.  Connect a micro USB cable between the host PC and the LPC-Link USB port (J8) on the target board.
2.  Open a serial terminal with the following settings:
    - 115200 baud rate
    - 8 data bits
    - No parity
    - One stop bit
    - No flow control
3.  Download the program to the target board.

Running the demo
================
This demo is an external flash plain load demo, ROM will copy image in external flash to SRAMX to run:
1. Build the demo to generate a bin file.
   Note: If need to generate bin file using MCUXpresso IDE, below steps need to be followed:
         Set in example Properties->C/C++ Build->Settings->Build steps->Post-build steps->Edit
         enbable arm-none-eabi-objcopy -v -O binary "&{BuildArtifactFileName}" "&{BuildArtifactFileBaseName}.bin" 
         
         This plainload example linked the vector table to 0x00000000, but program to external flash 0x10000000.

2. Program the bin file to external on board flash via SEGGER J-FLASH Lite(V6.22 or higher):

   a. Open SEGGER J-FLASH Lite, select device LPC54018.

   b. Click the 'Erase Chip' to erase the extrenal flash.(if can not success, press SW4 button and reset the board, and try to erase again)

   c. Select the bin data file, set the '.bin/Erase Start' address to 0x10000000, then click 'Program Device'
Note: Please use above way to program the binary file built by armgcc tool chain to external flash. 
      For IAR, KEIL, MCUXpresso IDE, you can use the IDE tool to program the external flash.  
Launch the debugger in your IDE to begin running the demo.

The following lines are printed to the serial terminal when the demo program is executed.
 
 GPIO Driver example

 The LED is taking turns to shine.

 Standard port read: ffbff7ff

 Masked port read: bfbff7ff

 Port state: bfbff7ff
 
Then press the SW2, the LED3 will start to shine.

Press corresponding switches to generate events
This example project does not call for any special hardware configurations.
Although not required, the recommendation is to leave the development board's jumper settings
and configurations in default state when running this example.
Customization options
=====================

