lpspi_polling_b2b_transfer_master#
Overview#
The lpspi_polling_b2b_transfer example shows how to use LPSPI driver in polling way.
In this example, we need two boards, one board used as LPSPI master and another board used as LPSPI slave. The file ‘lpspi_polling_b2b_transfer_master.c’ includes the LPSPI master code.
The LPSPI master send/received data to/from LPSPI slave using polling (The LPSPI slave is using interrupt to receive/send the data).
Running the demo#
When the demo runs successfully, you will see output in the terminal like this:
LPSPI board to board polling example.
This example use one board as master and another as slave.
Master uses polling way and slave uses interrupt 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
GND -- GND
Make sure the slave example is running, then press any key to continue.
Master transmit:
1 2 3 4 5 6 7 8 9 A B C D E F 10
11 12 13 14 15 16 17 18 19 1A 1B 1C 1D 1E 1F 20
21 22 23 24 25 26 27 28 29 2A 2B 2C 2D 2E 2F 30
31 32 33 34 35 36 37 38 39 3A 3B 3C 3D 3E 3F 40
LPSPI transfer all data matched!
Master received:
1 2 3 4 5 6 7 8 9 A B C D E F 10
11 12 13 14 15 16 17 18 19 1A 1B 1C 1D 1E 1F 20
21 22 23 24 25 26 27 28 29 2A 2B 2C 2D 2E 2F 30
31 32 33 34 35 36 37 38 39 3A 3B 3C 3D 3E 3F 40
Press any key to run again.