Overview
========
The lpspi_edma example shows how to use LPSPI driver in edma way:

In this example , one lpspi instance used as LPSPI master and another lpspi instance used as LPSPI slave .

1. LPSPI master send/received data to/from LPSPI slave in edma . (LPSPI Slave using edma to receive/send the data)



Toolchain supported
===================
- IAR embedded Workbench 7.60.1
- Keil MDK 5.17
- GCC ARM Embedded 2015-4.9-q3
- Kinetis Development Studio IDE 3.0.0
- Atollic TrueSTUDIO 5.4.0

Hardware requirements
=====================
- Mini USB cable
- FRDM-KL28Z board
- Personal Computer

Board settings
==============
To make the example work, connections needed to be as follows:
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
       MASTER           connect to      SLAVE
Pin Name   Board Location     Pin Name  Board Location
SOUT       J2 pin 8             SIN       J20 pin 7
SIN        J2 pin 10            SOUT      J20 pin 6
SCK        J2 pin 12            SCK       J20 pin 5
PCS0       J2 pin 6             PCS0      J20 pin 4
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~

Prepare the Demo
================
1. Connect a mini USB cable between the PC host and the OpenSDA USB port on the board.
2. Open a serial terminal on PC for OpenSDA serial device with these settings:
    - 115200 baud rate
    - 8 data bits
    - No parity
    - One stop bit
    - No flow control
3. Download the program to the target board.
4. Either press the reset button on your board or launch the debugger in your IDE to begin running
   the demo.

Running the demo
================
When the example runs successfully, you can see the similar information from the terminal as below.


LPSPI edma example start.
This example use one lpspi instance as master and another as slave on one board.
Both master and slave use edma way.
Please make sure you make the correct line connection. Basically, the connection is:
LPSPI_master -- LPSPI_slave
   CLK      --    CLK
   PCS      --    PCS
   SOUT     --    SIN
   SIN      --    SOUT

This is LPSPI slave edma transfer completed callback.
It's a successful transfer.

LPSPI transfer all data matched!

End of example.

Customization options
=====================


