flexcomm_spi_dma_b2b_transfer_slave
Overview
The spi_dma_b2b_transfer_slave example shows how to use driver API to transfer in DMA way.
In this example, one spi instance as master and another spi instance on the other board as slave. Master sends a piece of data to slave, and receive a piece of data from slave. This example checks if the data received from master is correct. This example needs to work with spi_dma_b2b_transfer_master example.
Note: This example will run in slave mode, please prepare another board for master, and the slave board should be started first.
Project Infomation
Program Flow:
Main routine: 1.Initialize the hardware. Configure pin settings, clock settings by using BOARD_InitHardware();
2.Send information to terminal by using debug console.
3.Initialize the SPI with configuration.
4.Set up DMA configuration for slave SPI. Initialize DMA and DMA channel setting(create handle and set callback) for both SPI RX and TX, set prioritory for TX channel and RX channel.
5.Start SPI master transfer in DMA way. Initialize buffers and start SPI transfer in DMA way.
6.Check if data from master is all right. Waiting for transmission complete, print received data and log information to terminal.
7.De-initialize the SPI and DMA.