SPI PDC Example

Purpose

This example uses Serial Peripheral Interface (SPI) of one EK board in slave mode to communicate with another EK board's SPI in master mode by PDC function.

Requirements

This package can be used with two SAM evaluation kits boards. Please connect the SPI pins from one board to another.

Descriptions

This example shows control of the SPI, and how to configure and transfer data with SPI. By default, example runs in SPI slave mode, waiting SPI slave & UART inputs.

This example has been tested with the following board:

• sam3n4c_sam3n_ek
• sam3s4c_sam3s_ek
• sam3sd8c_sam3s_ek2
• sam4s16c_sam4s_ek
• sam4sd32c_sam4s_ek2
• sam4n16c_sam4n_xplained_pro
• sam4c16c_sam4c_ek
• samg53n19_samg_xplained_pro
• sam4cp16b_sam4cp16bmb
• samg55j19_samg_xplained_pro

The code can be roughly broken down as follows:

• 't' will start SPI transfer test.
  1. Configure SPI as master, and set up SPI clock.
  2. Send 64-byte data and receive data from slave at same time, after that compare the result.
• Setup SPI clock for master.

Usage

1. Compile the application.
2. Connect the UART port of the evaluation board to the computer and open it in a terminal.
   • Settings: 115200 bauds, 8 bits, 1 stop bit, no parity, no flow control.
3. Download the program into the evaluation board and run it.
4. Upon startup, the application will output the following line on the terminal:

   -- Spi Pdc Example  --
   -- xxxxxx-xx
   -- Compiled: xxx xx xxxx xx:xx:xx --

5. The following traces detail operations on the SPI PDC example, displaying success or error messages depending on the results of the commands.