Hardware requirements
Mini USB cable
Two FRDM-MCXC242 boards
Personal Computer
Board settings
SPI board to board: Transfers data through SPI interface. SPI0 pins of the master board are connected to the SPI1 pins of the slave board.
MASTER BOARD CONNECTS TO SLAVE BOARD
Pin Name Board Location Pin Name Board Location
MOSI J2 pin 8 MOSI J2 pin 18
MISO J2 pin 10 MISO J2 pin 20
SCK J2 pin 12 SCK J1 pin 11
PCS0 J2 pin 6 PCS0 J1 pin 9
GND J2 pin 14 GND J2 pin 14
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Prepare the Demo
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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. Reset the SoC and run the project.
Running the demo
===============
When the demo runs successfully, the log would be seen on the OpenSDA terminal like:
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SPI CMSIS interrupt transfer start.
This example use one spi instance as master and another as slave on one board.
Master and slave are both use interrupt way.
Please make sure you make the correct line connection. Basically, the connection is:
SPI_master -- SPI_slave
CLK -- CLK
PCS -- PCS
MOSI -- MOSI
MISO -- MISO
Master transmit:
0 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
SPI transfer all data matched!
Master received:
0 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
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