RE: nrf52:SPI master with softDevice can not work

AllenSun — Mon, 30 Jan 2023 02:50:14 GMT

Hello, what's the meaning of "With the softDevice, the SPI frequency can only be set once."? I notice you just set the SPI frequence once in your code.

RE: nrf52:SPI master with softDevice can not work

wpb3dm — Mon, 31 Oct 2016 07:59:25 GMT

OK，I have find the problems. With the softDevice, the SPI frequency can only be set once.

RE: nrf52:SPI master with softDevice can not work

wpb3dm — Sun, 30 Oct 2016 08:22:45 GMT

//the code my added is the following:

//my add start -----------------------------

#define SPI_MASTER_0_ENABLE 
#define SD_CS  	30 
#define SD_MISO	28
#define SD_MOSI	27
#define SD_SCK	29

static nrf_drv_spi_t	m_spi_master = NRF_DRV_SPI_INSTANCE(0);
static volatile bool spi_xfer_done = true;  

/**
 * @brief SPI user event handler.
 * @param event
 */
void spi_event_handler(nrf_drv_spi_evt_t const * p_event)
{
	printf("p_event->type=%d\r\n",p_event->type);

    spi_xfer_done = true;
}

/**
 * @brief spi_master_init.
 * @param spi_master_instance,spi_speed
 */
static uint32_t spi_master_init(nrf_drv_spi_t * spi_master_instance)
{
    uint32_t err_code = NRF_SUCCESS;

	nrf_drv_spi_config_t spi_config =
			{
				.ss_pin = SD_CS,
				.irq_priority = APP_IRQ_PRIORITY_LOW,
				.orc = 0xFF,
				.frequency = NRF_DRV_SPI_FREQ_4M, 
				.mode = NRF_DRV_SPI_MODE_3,
				.bit_order = NRF_DRV_SPI_BIT_ORDER_MSB_FIRST,
				.sck_pin = SD_SCK,
				.mosi_pin = SD_MOSI,
				.miso_pin = SD_MISO
			};

	err_code = nrf_drv_spi_init(spi_master_instance, &spi_config, spi_event_handler);		

    return err_code;
    
}

//SPI Write one byte data
uint8_t SPI1_WriteOneByte(uint8_t TxData)
{
    uint8_t spi_txbuf = TxData;
	
	spi_xfer_done = false;		
    uint32_t err_code = nrf_drv_spi_transfer(&m_spi_master, &spi_txbuf, 1, NULL, 0);

	//wait for the data to transfer complete.
	while(!spi_xfer_done)
	{
		__WFE();
	}
	
	printf("\r\n SPI1_WriteOneByte transfer complete\r\n"); 	
		
	return true;

}
//my add end -----------------------------


/**@brief Application main function.
 */
int main(void)
{
    uint32_t err_code;
    bool erase_bonds;

    // Initialize.
    APP_TIMER_INIT(APP_TIMER_PRESCALER, APP_TIMER_OP_QUEUE_SIZE, false);
    uart_init();

    buttons_leds_init(&erase_bonds);
    ble_stack_init();
    gap_params_init();
    services_init();
    advertising_init();
    conn_params_init();

    printf("\r\nUART Start!\r\n");
    err_code = ble_advertising_start(BLE_ADV_MODE_FAST);
    APP_ERROR_CHECK(err_code);

	//my add start -----------------------------
	uint8_t i;
	spi_master_init(&m_spi_master);		
	nrf_delay_ms(500);	
 	for(i=0;i<10;i++)
		SPI1_WriteOneByte(0XFF);
    //my add end -----------------------------
	
    // Enter main loop.
    for (;;)
    {
        power_manage();
    }
}


/** 
 * @}
 */

RE: nrf52:SPI master with softDevice can not work

wpb3dm — Sun, 30 Oct 2016 08:04:29 GMT

Yes,I'm sure. It can not enter into void spi_event_handler(nrf_drv_spi_evt_t const * p_event). The programme stop in while (!spi_xfer_done) { __WFE(); }

RE: nrf52:SPI master with softDevice can not work

Jørgen Holmefjord — Tue, 25 Oct 2016 13:38:13 GMT

I tried adding your code to the ble_app_uart example and printed a string to UART in spi_event_handler. This seems to work fine for me. Are you sure that you do not receive any SPI events?