SPI issue with softdevice enabled on nRF52840

RE: SPI issue with softdevice enabled on nRF52840

Vishnu Pradeep — Fri, 24 May 2019 04:31:48 GMT

Hi all,

The problem was with CS pin. CONFIG_NFCT_PINS_AS_GPIOS was not defined in one project and defined in other.

Thanks

RE: SPI issue with softdevice enabled on nRF52840

Vishnu Pradeep — Wed, 22 May 2019 12:01:53 GMT

Thanks.

where is it defined? I couldn't find the function nrf_memset.

RE: SPI issue with softdevice enabled on nRF52840

Rajat — Tue, 21 May 2019 09:03:07 GMT

Also , for me memset was creating few issues when i used spi , you should try using nrf_memset function.

Maybe that helps

RE: SPI issue with softdevice enabled on nRF52840

Rajat — Tue, 21 May 2019 06:00:48 GMT

devzone.nordicsemi.com/.../mcp_5F00_can.c

you can take refernce from this file , it won't compile on your end ,because it needs other header files and stuff , But it can help you with few things i hope

Thanks

RE: SPI issue with softdevice enabled on nRF52840

Vishnu Pradeep — Tue, 21 May 2019 05:55:42 GMT

I am using NRF_LOG RTT not UART. Even if I disable NRF_LOG the issue exists

RE: SPI issue with softdevice enabled on nRF52840

Rajat — Tue, 21 May 2019 05:53:58 GMT

Yes , its possible
But i also think that NRF_LOG by default is on UART pins(8,6) which are same for your spi slave
Maybe try interfacing first on the separate pins or not use NRF_LOG

RE: SPI issue with softdevice enabled on nRF52840

Vishnu Pradeep — Tue, 21 May 2019 05:46:09 GMT

Does this happen if there is any issue with hardware?

RE: SPI issue with softdevice enabled on nRF52840

Rajat — Tue, 21 May 2019 05:14:36 GMT

My project is actually huge , so i will send you the can files and sdk_config file

RE: SPI issue with softdevice enabled on nRF52840

Vishnu Pradeep — Tue, 21 May 2019 04:29:32 GMT

Thanks, Actually the drivers are working fine and I could build my application successfully. But I have to run spi example code after chip erase to get my application to work!!.
Anyway I can cross check with your code if anything is wrong with the sdk config file or any other settings. Please share.

RE: SPI issue with softdevice enabled on nRF52840

Rajat — Tue, 21 May 2019 03:39:56 GMT

i have used spi peripheral for CAN bus protocol , would you like to get some reference from that?. It works on my side for CAN bus

RE: SPI issue with softdevice enabled on nRF52840

Vishnu Pradeep — Mon, 20 May 2019 13:16:40 GMT

devzone.nordicsemi.com/.../spi_5F00_nand.rar

this is the nand flash library we are using. This gives the same issue

RE: SPI issue with softdevice enabled on nRF52840

Rajat — Mon, 20 May 2019 11:37:29 GMT

Can you send the code that you are using , previous one has a lot of errors in it , its not compiling on my end

Thanks

RE: SPI issue with softdevice enabled on nRF52840

Vishnu Pradeep — Mon, 20 May 2019 11:36:10 GMT

Thanks,

1. Yes it is going high and low. only SPI MOSI/MISO is not giving anything. CS and SCK is working.
2. I tried this, but same problem.

RE: SPI issue with softdevice enabled on nRF52840

Rajat — Mon, 20 May 2019 11:19:51 GMT

1. Is your CS pin going high and low as demanded by the Chip ?
2. Can you try defining the spi_config.ss_pin = CS_PIN_NUMBER(10 i guess) , instead of NULL.

RE: SPI issue with softdevice enabled on nRF52840

Vishnu Pradeep — Mon, 20 May 2019 10:44:33 GMT

Code is not getting stuck. its just not reading the ID of the device, or I am not seeing any kind of transfer from nrf528400 SPI. My application check for device ID 3 times and if it fails it enters to an infinite loop.

RE: SPI issue with softdevice enabled on nRF52840

Kenneth — Mon, 20 May 2019 09:11:24 GMT

Have you tried to add some debug output (e.g. UART) to see if the code may be stuck somewhere? Have you tried calling nrf_drv_spi_transfer() several times with a delay of 100ms, to for instance check if it just needs a dummy read before it responds as expected?

RE: SPI issue with softdevice enabled on nRF52840

Vishnu Pradeep — Fri, 17 May 2019 13:00:13 GMT

DSO shows no data transmission from nrf52840 after running the code fresh. Again if I run the spi example code and rerun our application it shows data transmission!!

RE: SPI issue with softdevice enabled on nRF52840

Kenneth — Wed, 08 May 2019 12:44:46 GMT

I think the next step is a logic analyzer trace to compare working and failing.

RE: SPI issue with softdevice enabled on nRF52840

Vishnu Pradeep — Wed, 08 May 2019 12:42:03 GMT

I added delay of 200ms before flash initialization. It didn't work. But if I run the above code and then go back to my application and dump it, it works.

RE: SPI issue with softdevice enabled on nRF52840

Kenneth — Wed, 08 May 2019 12:38:29 GMT

Maybe a logic analyzer trace of the serial interface can give an idea if some pins may be floating causing issues? Also a short delay (e.g. 100ms) in the beginning of main() before writing to the external flash may be something to also try.

RE: SPI issue with softdevice enabled on nRF52840

Vishnu Pradeep — Wed, 08 May 2019 12:05:30 GMT

int main(void)
{
   // bsp_board_init(BSP_INIT_LEDS);

    APP_ERROR_CHECK(NRF_LOG_INIT(NULL));
    NRF_LOG_DEFAULT_BACKENDS_INIT();



    nrf_gpio_cfg_output(10);
    nrf_gpio_cfg_output(25);

   nrf_gpio_pin_set(10);

    nrf_drv_spi_config_t spi_config = NRF_DRV_SPI_DEFAULT_CONFIG;
    spi_config.ss_pin   =NULL ;
    spi_config.miso_pin =7;
    spi_config.mosi_pin =9;
    spi_config.sck_pin=8;
    APP_ERROR_CHECK(nrf_drv_spi_init(&spi, &spi_config, spi_event_handler, NULL));


    NRF_LOG_INFO("SPI example started.");

  // Reset rx buffer and transfer done flag
        memset(rx_buf, 0, 200);
        memset(tx_buf, 0, 200);
        tx_buf[0]=0x9F;
        tx_buf[1]=0x00;
        spi_xfer_done = false;
        
         nrf_gpio_pin_clear(10);


        APP_ERROR_CHECK(nrf_drv_spi_transfer(&spi, tx_buf, 2, rx_buf, 4));
        //APP_ERROR_CHECK(nrf_drv_spi_transfer(&spi, m_tx_buf, 2, m_rx_buf, m_length));

        while (!spi_xfer_done)
        {
            __WFE();
        } 
        nrf_gpio_pin_set(10);
    if(m_rx_buf[2]==0x98 && m_rx_buf[3] == 0xBD){
    NRF_LOG_INFO("Flash detected.");
    }
    else{
    NRF_LOG_INFO("Flash not detected.");
    }
       
        while(1);
    
}

This is the code I used to check data. It reads ID properly.

RE: SPI issue with softdevice enabled on nRF52840

Rajat — Wed, 08 May 2019 05:44:42 GMT

A piece of code will make it easier for the viewers to understand what can be done to solve the issue

Thanks

Rajat 🙂