nrf52840 qspi cant act as spi pin?

[pipixia_8_8]

hi ,

i want to use the pin p0.19， p0.20， p0.21， p0.20 as the spi‘s pin scl，cs,mosi,miso.

and i test in  the project nRF5_SDK_16.0.0_98a08e2\examples\peripheral\spi

my device is pca10056,i just modify the pin like this:

int main(void)
{
    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   = 20/*SPI_SS_PIN*/;
    spi_config.miso_pin = 22/*SPI_MISO_PIN*/;
    spi_config.mosi_pin = 21/*SPI_MOSI_PIN*/;
    spi_config.sck_pin  = 19/*SPI_SCK_PIN*/;
    APP_ERROR_CHECK(nrf_drv_spi_init(&spi, &spi_config, spi_event_handler, NULL));

    NRF_LOG_INFO("SPI example started.");

    while (1)
    {
        // Reset rx buffer and transfer done flag
        memset(m_rx_buf, 0, m_length);
        spi_xfer_done = false;

        APP_ERROR_CHECK(nrf_drv_spi_transfer(&spi, m_tx_buf, m_length, m_rx_buf, m_length));

        while (!spi_xfer_done)
        {
            __WFE();
        }

        NRF_LOG_FLUSH();

        bsp_board_led_invert(BSP_BOARD_LED_0);
        nrf_delay_ms(200);
    }
}

and i cut off the point of connect between u3 and nrf52840's qspi pin in pca10056.and i also cant measure the ware of spi .as the  description of nrf52840 ,p0.19 p0.20 p0.21 p0.22 is high speed gpio .so i dont know why the qspi‘s  io cant be spi pin.and i try to modify the the spi 's pin to other high speed pin,and it can work.so if the pin of qspi cant be spi's pin?

[pipixia_8_8]

and i try to use it as as gpio ，and it also cant work ,my code like this 

and the ware like this ,the channel 0 is p0.30,and the channel 1,2,3 is p0.19,p0.20,p0.21

so if there is some config should execute before use the qspi'pin as gpio?

[pipixia_8_8]

[Jared]

Hi,

From the nRF52840 DK Hardware description:"To use the GPIOs for a purpose other than the onboard external memory and have them available on the P24 connector, six solder bridges (SB10–SB15) must be cut and six solder bridges (SB20–SB25) must be shorted". 

So, you have to cut six solder bridges and also solder six others for it to work.

regards

Jared 

[pipixia_8_8]

hi Jared,

thank for your reply,i cut and short the bridges as the description,the pins work well.thank for your reply.