spislv SPI slave example

A simple example for the device functioning as an SPI slave. This example can be used to validate communication with another device operating as an SPI master. This example contains a hardcoded buffer, which is: {0x01, 0x02, 0x03, 0x04, 0x05, 0x06, 0x07, 0x08, 0x09, 0x0A, 0x0B, 0x0C, 0x0D, 0x0E, 0x0F}. Whenever data is received, this example will send the same number of bytes received, consuming the hardcoded buffer in a circular manner. and the following command is sent:

spi exch -x 4 deadbeef

The expected response in device running spislv_test app is:

Queued for sending to master: 01 02 03 04

This test requires the device to be configured in SPI slave mode.(your specific spi slave hardware settings might require additional settings).

Specific configuration options for this example include: Configs inside <> are the options that you need to find, It are arch de- pendent and might be different for your board.

• <Enable SPI Peripheral Support> – Enables SPI peripheral support in System Type->Peripheral Support.

• <Configure SPI> – Configures SPI peripheral in System Type->SPI configuration. Set here the right pins to be used for SPI communication.

• CONFIG_SPI – In the SPI driver support, enable SPI Slave support.

• CONFIG_SPI_SLAVE – Enables SPI Slave support.

• SPI_SLAVE_DRIVER – Enables SPI Slave character driver.

• <Configure SPI> – Return to this option and enable SPI Slave mode.