spi problem

RE: spi problem

Hung Bui — Fri, 24 Jul 2015 09:20:01 GMT

@jerly: Your chip is the latest one (XLR3). So what was the issue when you test with the SPI library from SDK v8.0 ?

RE: spi problem

jerly — Thu, 23 Jul 2015 15:13:32 GMT

Hung.thank you for answer.i want to write and read data from external flash(W25Q64).i have test it with DK.the chip revision is N51422 QFACA1 1442AB

RE: spi problem

Hung Bui — Thu, 23 Jul 2015 12:20:28 GMT

@jerly: No, it's from SDK v5.2 not SDKv6.0. As I mentioned it's too old.

Please let me now what's the issue you had with SDK v8.0 ? Also which chip revision are you using ? Please read the laser mark on top of the chip to find the chip revision.

RE: spi problem

jerly — Thu, 23 Jul 2015 01:20:28 GMT

Hi Hung Bui: yes. it is from sdk6.0.but i have used spi from sdk8.0,and the code run away when CS was pulled up.so i revised sdk6.0

RE: spi problem

Hung Bui — Tue, 21 Jul 2015 15:22:38 GMT

@jerly: Are you sure you are testing with SDK 8.0 and the code is from the file spi_master.c in \components\drivers_nrf\spi_master ? I can't find the same code in my SDK 8.0.

The code looks like it's from SDK v5.2.0 which is very old and should not be used with S110 v8.0 I attached the spi_master.c in SDK 8.0 in my answer for your reference.

RE: spi problem

jerly — Tue, 21 Jul 2015 14:51:45 GMT

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;

}

RE: spi problem

Hung Bui — Tue, 21 Jul 2015 09:08:49 GMT

@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