spi problem

[jerly]

Hi:

I use spi0(0x40003000) to wirte data to external flash(W25Q64) with SD8.0(sdk8.0.if I write data without sd, it is OK), and when program run to rx_data[number_of_txd_bytes]=(uint8_t)spi_base->RXD in spi_master.c.and program can't continue running normally. and if the SD make the mistake? or other reasons?

[Hung Bui]

@jerly: I can't find this code rx_data[number_of_txd_bytes]=(uint8_t)spi_base->RXD in our spi_master.c in SDK v8.0. I dont think reading spi_base->RXD would cause any trouble. Could you attach your code ?

spi_master.c

[jerly]

Hi Hung Bui: following the code: bool spi_master_tx_rx(uint32_t *spi_base_address, uint32_t transfer_size, const uint8_t *tx_data, uint8_t *rx_data) { uint32_t counter = 0; uint16_t number_of_txd_bytes = 0; /*lint -e{826} //Are too small pointer conversion */ NRF_SPI_Type *spi_base = (NRF_SPI_Type *)spi_base_address;

while(number_of_txd_bytes < transfer_size)
{
    spi_base->TXD = (uint32_t)(tx_data[number_of_txd_bytes]);

    /* Wait for the transaction complete or timeout (about 10ms - 20 ms) */
    while ((spi_base->EVENTS_READY == 0U) && (counter < TIMEOUT_COUNTER))
    {
        counter++;
    }

    if (counter == TIMEOUT_COUNTER)
    {
        /* timed out, disable slave (slave select active low) and return with error */
        return false;
    }
    else
    {   /* clear the event to be ready to receive next messages */
        spi_base->EVENTS_READY = 0U;
    }


    rx_data[number_of_txd_bytes] = (uint8_t)spi_base->RXD;


    number_of_txd_bytes++;
};

/* disable slave (slave select active low) */

return true;

}