2 SPI devices nordic nRF52382

Question

Hi All, 
 
 I am using nRF52382 and sdk 15.0. I have two SPI devices using separate pins. They work just fine separately, when I try to enable two instances I get compilation errors 
 
 Device 1 setup (separate): 
 #define SPI_INSTANCE 1 /**< SPI instance index. */
static const nrf_drv_spi_t spi = NRF_DRV_SPI_INSTANCE(SPI_INSTANCE); /**< SPI instance. */

nrf_drv_spi_config_t spi_config = NRF_DRV_SPI_DEFAULT_CONFIG;
spi_config.ss_pin = 11;
spi_config.miso_pin = 17;
spi_config.mosi_pin = 12;
spi_config.sck_pin = 13;
spi_config.frequency = NRF_DRV_SPI_FREQ_8M; 
spi_config.mode = NRF_DRV_SPI_MODE_1; //MODE 0 for flash 1 for DAC 
spi_config.bit_order = NRF_DRV_SPI_BIT_ORDER_MSB_FIRST;

APP_ERROR_CHECK(nrf_drv_spi_init(&spi, &spi_config, spi_event_handler, NULL)); 
 
 Device 2 setup (separate): 
 #define SPI_INSTANCE 1 /**< SPI instance index. */
static const nrf_drv_spi_t spi = NRF_DRV_SPI_INSTANCE(SPI_INSTANCE); /**< SPI instance. */

nrf_drv_spi_config_t spi_config = NRF_DRV_SPI_DEFAULT_CONFIG;
spi_config.ss_pin = 29;//
spi_config.miso_pin = 30;//
spi_config.mosi_pin = 27;//
spi_config.sck_pin = 25;//
spi_config.frequency = NRF_DRV_SPI_FREQ_8M; 
spi_config.mode = NRF_DRV_SPI_MODE_0; //MODE 0 for flash 1 for DAC 
spi_config.bit_order = NRF_DRV_SPI_BIT_ORDER_MSB_FIRST;

APP_ERROR_CHECK(nrf_drv_spi_init(&spi, &spi_config, spi_event_handler, NULL)); 
 
 Can anyone please guide me how should I enable both devices to work simultaneously?

Yasser · Accepted Answer

I am trying to use instances 1 and 2 as you suggested.
In the main file:

#define SPI_INSTANCE  1 /**< SPI instance index. */
static const nrf_drv_spi_t spi = NRF_DRV_SPI_INSTANCE(SPI_INSTANCE);  /**< SPI instance. */

    nrf_drv_spi_config_t spi_config = NRF_DRV_SPI_DEFAULT_CONFIG;
    spi_config.ss_pin   = 11;//29;//
    spi_config.miso_pin = 17;//30;//
    spi_config.mosi_pin = 12;//27;//
    spi_config.sck_pin  = 13;//25;//
    spi_config.frequency    = NRF_DRV_SPI_FREQ_8M;                     
    spi_config.mode         = NRF_DRV_SPI_MODE_1;    //MODE 0 for flash 1 for DAC                  
    spi_config.bit_order    = NRF_DRV_SPI_BIT_ORDER_MSB_FIRST;
    
    APP_ERROR_CHECK(nrf_drv_spi_init(&spi, &spi_config, spi_event_handler, NULL));

#define SPI_INSTANCE2  2 /**< SPI instance index. */
static const nrf_drv_spi_t spi2 = NRF_DRV_SPI_INSTANCE(SPI_INSTANCE2);  /**< SPI instance. */

    nrf_drv_spi_config_t spi_config2 = NRF_DRV_SPI_DEFAULT_CONFIG;
    spi_config2.ss_pin   = 29;//30 for sd 16 for afe
    spi_config2.miso_pin = 30;//7
    spi_config2.mosi_pin = 27;//15
    spi_config2.sck_pin  = 25;//12
    spi_config2.frequency    = NRF_DRV_SPI_FREQ_8M;                     
    spi_config2.mode         = NRF_DRV_SPI_MODE_0;                      
    spi_config2.bit_order    = NRF_DRV_SPI_BIT_ORDER_MSB_FIRST;
    
    APP_ERROR_CHECK(nrf_drv_spi_init(&spi2, &spi_config2, spi_event_handler, NULL));

In sdk_config.h

// <e> SPI1_ENABLED - Enable SPI1 instance
//==========================================================
#ifndef SPI1_ENABLED
#define SPI1_ENABLED 1
#endif
// <q> SPI1_USE_EASY_DMA  - Use EasyDMA
 

#ifndef SPI1_USE_EASY_DMA
#define SPI1_USE_EASY_DMA 1
#endif

// </e>

// <e> SPI2_ENABLED - Enable SPI2 instance
//==========================================================
#ifndef SPI2_ENABLED
#define SPI2_ENABLED 1
#endif
// <q> SPI2_USE_EASY_DMA  - Use EasyDMA
 

#ifndef SPI2_USE_EASY_DMA
#define SPI2_USE_EASY_DMA 1
#endif


// <q> NRFX_SPI1_ENABLED  - Enable SPI1 instance
 

#ifndef NRFX_SPI1_ENABLED
#define NRFX_SPI1_ENABLED 1
#endif

// <q> NRFX_SPI2_ENABLED  - Enable SPI2 instance
 

#ifndef NRFX_SPI2_ENABLED
#define NRFX_SPI2_ENABLED 1
#endif

Still, I am getting build errors. Can you please check.

hmolesworth · Answer

Change the second instance to (eg) 2; the instance selects the SPI peripheral 0, 1 or 2 and you are using 2 of these. You might have to also change the sdk_config.h to ensure that the SPI2 is enabled otherwise there will be build errors. Search for " _ENABLED 1 " to locate the settings which enabled all peripherals and in particular SPI 1 (ie. instance 1) then find SPI2 and enable likewise.

2 SPI devices nordic nRF52382

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