RE: SPI communication between Arduino and nrf51dk

Manu — Sun, 13 Nov 2016 02:22:21 GMT

@awneil: Hi, i added the spi slave example to nus-uart but it is not working. I am not getting any error but spi section is not working though it works independently without nus(checked using spi-master). I added these two functions to nus-uart, and called spi_slave_init() in main() -

       static void spi_slave_init	(void)	
      {   
               nrf_drv_spis_config_t spis_config = NRF_DRV_SPIS_DEFAULT_CONFIG(SPIS_INSTANCE);
               spis_config.csn_pin               = SPIS_CS_PIN;
               memset(m_rx_buf, 0, m_length);
               APP_ERROR_CHECK(nrf_drv_spis_init(&spis, &spis_config, spis_event_handler));
               spis_xfer_done = false;
               APP_ERROR_CHECK(nrf_drv_spis_buffers_set(&spis, m_tx_buf, m_length, m_rx_buf,     m_length));

            while (!spis_xfer_done)
           {
              __WFE();
            } 
	
           }
           void spis_event_handler(nrf_drv_spis_event_t event)
          {
	       if (event.evt_type == NRF_DRV_SPIS_XFER_DONE)
                       {
                          spis_xfer_done = true;
                          NRF_LOG_PRINTF(" Transfer completed. Received: %s\n",m_rx_buf);
			
	              if(SPI_BUFFER_SIZE <= 20)
			{
					ble_nus_string_send(&m_nus, &m_rx_buf[0], SPI_BUFFER_SIZE);
			}					
			LEDS_INVERT(BSP_LED_3_MASK);
}

}

RE: SPI communication between Arduino and nrf51dk

awneil — Sat, 12 Nov 2016 12:58:51 GMT

You need to learn to break problems down into their constituent parts.

In this case, two parts should be immediately apparent:

SPI;
NUS-UART.

It should be easy enough to find examples of each - so get each one working separately, and then bring the two together.