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lpspi_edma_transfer

lpspi_edma_transfer#

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)

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.

Supported Boards#

IMX943-EVK
Hardware requirements

  • Mini/micro USB cable

  • IMX943-EVK board

  • Personal Computer

Board settings

LPSPI:

       MASTER(LPSPI3)      connect to    SLAVE(LPSPI8)
Pin Name   Board Location     Pin Name    Board Location
SOUT       J47-8                SIN       J43-10
SIN        J47-10               SOUT      J43-8
SCK        J47-12               SCK       J43-12
PCS0       J47-6                PCS0      J43-6
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.
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