19.8.3.3.2 Workflow

  1. Select slave. 
    spi_select_slave(&spi_master_instance, &slave, true);
  2. Write buffer to SPI slave. 
    spi_transceive_buffer_job(&spi_master_instance, wr_buffer,rd_buffer,BUF_LENGTH);
  3. Wait for the transfer to be complete. 
    while (!transrev_complete_spi_master) {
}
transrev_complete_spi_master = false;
  4. Deselect slave. 
    spi_select_slave(&spi_master_instance, &slave, false);
  5. Infinite loop. 
    while (true) {
    /* Infinite loop */
    if (!port_pin_get_input_level(BUTTON_0_PIN)) {
        spi_select_slave(&spi_master_instance, &slave, true);
        spi_transceive_buffer_job(&spi_master_instance, wr_buffer,rd_buffer,BUF_LENGTH);
        while (!transrev_complete_spi_master) {
        }
        transrev_complete_spi_master = false;
        spi_select_slave(&spi_master_instance, &slave, false);
    }
}