RE: How to communicate with LSM9DS1 and SPI with nrf52840

Edvin — Mon, 14 May 2018 13:10:56 GMT

Hello,

If you look at the definition of NRF_DRV_SPI_DEFAULT_CONFIG (found on line 214 in nrf_drv_spi.h), you will see what it defines. You can use this default config for initializing the SPI, and change the settings that you want to use, like it is done in the spi example in the SDK.

If you are still having trouble getting the two chips to work together, try out the different modes

    bsp_board_init(BSP_INIT_LEDS);

    APP_ERROR_CHECK(NRF_LOG_INIT(NULL));
    NRF_LOG_DEFAULT_BACKENDS_INIT();

    nrf_drv_spi_config_t spi_config = NRF_DRV_SPI_DEFAULT_CONFIG;
    spi_config.ss_pin   = SPI_SS_PIN;
    spi_config.miso_pin = SPI_MISO_PIN;
    spi_config.mosi_pin = SPI_MOSI_PIN;
    spi_config.sck_pin  = SPI_SCK_PIN;
    spi_config.mode     = NRF_DRV_SPI_MODE_0;   //also test modes 1, 2 and 3
    APP_ERROR_CHECK(nrf_drv_spi_init(&spi, &spi_config, spi_event_handler, NULL));

    NRF_LOG_INFO("SPI example started.");

Best regards,

Edvin