complicated problem in sdk17.0.2 interactive command uart rx/tx output buffer

[yu1998]

so Im tring to use interactive command to output my personal content

NRF_CLI_CMD_REGISTER(devices_ccc, NULL, "List available devices.", cmd_devices_display_ccc);


static void cmd_devices_display_ccc(nrf_cli_t const * p_cli, size_t argc, char ** argv)
{
    if (argc >= 2)
    {
        if (nrf_cli_help_requested(p_cli))
        {
            nrf_cli_help_print(p_cli, NULL, 0);
            return;
        }
        else
        {
            nrf_cli_fprintf(p_cli,
                            NRF_CLI_ERROR,
                            "%s:%s%s\n",
                            argv[0],
                            " bad parameter ",
                            argv[1]);
            return;
        }
    }

    // Print connectable devices from scan data.
    scanned_device_t * p_device_list = scan_device_info_get();
    device_list_print_ccc(p_cli, p_device_list);
}

static void device_list_print_ccc(nrf_cli_t const * p_cli, scanned_device_t * p_device)
{


  

    for (uint8_t i = 0; i < DEVICE_TO_FIND_MAX; i++)
    {
        if (p_device[i].is_not_empty)
        {
          //  nrf_cli_fprintf(p_cli, NRF_CLI_NORMAL, "Devicekkk");

            char buffer[ADDR_STRING_LEN];
          //  char buffer_data[ p_device[i].format.datalen_int];
            int_addr_to_hex_str(buffer, BLE_GAP_ADDR_LEN, p_device[i].addr);
           // int_to_hex_str(buffer_data,p_device[i].format.datalen_int, p_device[i].dev_name,p_device[i].format.fulldata);
            if(p_device[i].cnt_type == T_APPLE){
         //    nrf_cli_fprintf(p_cli, NRF_CLI_NORMAL, ",%d,%s,%s,%02x%x%x%x%02x%02x%02x%02x%02x%02x%02x%02x%02x%02x%02x%02x\n"
           //   , p_device[i].cnt_type, buffer,  p_device[i].dev_name ,p_device[i].uuid[0],p_device[i].uuid[1],p_device[i].uuid[2]
             // ,p_device[i].uuid[3],p_device[i].uuid[4],p_device[i].uuid[5],p_device[i].uuid[6],p_device[i].uuid[7],p_device[i].uuid[8]
              //,p_device[i].uuid[9],p_device[i].uuid[10],p_device[i].uuid[11],p_device[i].uuid[12],p_device[i].uuid[13],p_device[i].uuid[14]
              //,p_device[i].uuid[15]);
              nrf_cli_fprintf(p_cli, NRF_CLI_NORMAL, "%d,%s,%s,%.2x%.2x%.2x%.2x%.2x%.2x%.2x%.2x%.2x%.2x%.2x%.2x%.2x%.2x%.2x%.2x \n"
              , p_device[i].cnt_type, buffer,  p_device[i].dev_name ,p_device[i].uuid[0],p_device[i].uuid[1],p_device[i].uuid[2]
              ,p_device[i].uuid[3],p_device[i].uuid[4],p_device[i].uuid[5],p_device[i].uuid[6],p_device[i].uuid[7],p_device[i].uuid[8]
              ,p_device[i].uuid[9],p_device[i].uuid[10],p_device[i].uuid[11],p_device[i].uuid[12],p_device[i].uuid[13],p_device[i].uuid[14]
              ,p_device[i].uuid[15]);
              for(int t=0;t<p_device[i].format.datalen_int;t++){
              
             //   nrf_cli_fprintf(p_cli, NRF_CLI_NORMAL,"%.2x",p_device[i].format.fulldata[t]);
               // nrf_cli_fprintf(p_cli, NRF_CLI_NORMAL,"\n");
                                     
              }
            }else{
              nrf_cli_fprintf(p_cli, NRF_CLI_NORMAL, "%d,%s, %s\n" , p_device[i].cnt_type, buffer,p_device[i].dev_name );

              for(int t=0;t<p_device[i].format.datalen_int;t++){
              
               // nrf_cli_fprintf(p_cli, NRF_CLI_NORMAL,"%.2x",p_device[i].format.fulldata[t]);
                //nrf_cli_fprintf(p_cli, NRF_CLI_NORMAL,"\n");
                                     
              }
            }
            
        }
       // printf("uuidcountfromcli_m: %d \n",uuid_lsb);
    }
   // int a=uuid_lsb;
}

same as the device command which out put the device  message

but i want to find the function which  put all the  character into a buffer before it output to the uart

also want to know when did the code call the Uart I only found

1. it called nrf_cli_fprintf

void nrf_cli_fprintf(nrf_cli_t const *      p_cli,
                     nrf_cli_vt100_color_t  color,
                     char const *           p_fmt,
                                            ...)
{
    ASSERT(p_fmt);
    ASSERT(p_cli);
    ASSERT(p_cli->p_ctx && p_cli->p_iface && p_cli->p_name);

    va_list args = {0};
    va_start(args, p_fmt);

#if NRF_MODULE_ENABLED(NRF_CLI_VT100_COLORS)
    if ((p_cli->p_ctx->internal.flag.use_colors) &&
        (color != p_cli->p_ctx->vt100_ctx.col.col))
    {
        nrf_cli_vt100_colors_t col;

        vt100_colors_store(p_cli, &col);
        vt100_color_set(p_cli, color);

        nrf_fprintf_fmt(p_cli->p_fprintf_ctx, p_fmt, &args);

        vt100_colors_restore(p_cli, &col);
    }
    else
#endif // NRF_MODULE_ENABLED(NRF_CLI_VT100_COLORS)
    {
        nrf_fprintf_fmt(p_cli->p_fprintf_ctx, p_fmt, &args);
    }

    va_end(args);
}

2.it called void nrf_fprintf_fmt

void nrf_fprintf_fmt(nrf_fprintf_ctx_t * const p_ctx,
                    char const *               p_fmt,
                    va_list *                  p_args)
{
    ASSERT(p_ctx != NULL);

    ASSERT(p_ctx->fwrite != NULL);
    ASSERT(p_ctx->p_io_buffer != NULL);
    ASSERT(p_ctx->io_buffer_size > 0);

    if (p_fmt == NULL)
    {
        return;
    }

    char c;
    int32_t v;
    uint32_t NumDigits;
    uint32_t FormatFlags;
    uint32_t FieldWidth;

    do
    {
        c = *p_fmt;
        p_fmt++;

        if (c == 0u)
        {
            break;
        }
        if (c == '%')
        {
            //
            // Filter out flags
            //
            FormatFlags = 0u;
            v = 1;

            do
            {
                c = *p_fmt;
                switch (c)
                {
                    case '-':
                        FormatFlags |= NRF_CLI_FORMAT_FLAG_LEFT_JUSTIFY;
                        p_fmt++;
                        break;
                    case '0':
                        FormatFlags |= NRF_CLI_FORMAT_FLAG_PAD_ZERO;
                        p_fmt++;
                        break;
                    case '+':
                        FormatFlags |= NRF_CLI_FORMAT_FLAG_PRINT_SIGN;
                        p_fmt++;
                        break;
                    default:
                        v = 0;
                        break;
                }
            } while (v);

            //
            // filter out field width
            //
            FieldWidth = 0u;
            do
            {
                if (c == '*')
                {
                    /*lint -save -e64 -e56*/
                    FieldWidth += va_arg(*p_args, unsigned);
                    /*lint -restore*/
                    p_fmt++;
                    break;
                }
                c = *p_fmt;
                if ((c < '0') || (c > '9'))
                {
                    break;
                }
                p_fmt++;
                FieldWidth = (FieldWidth * 10u) + (c - '0');
            } while (1);

            //
            // Filter out precision (number of digits to display)
            //
            NumDigits = 0u;
            c = *p_fmt;
            if (c == '.')
            {
                p_fmt++;
                do
                {
                    c = *p_fmt;
                    if ((c < '0') || (c > '9'))
                    {
                        break;
                    }
                    p_fmt++;
                    NumDigits = NumDigits * 10u + (c - '0');
                } while (1);
            }
            //
            // Filter out length modifier
            //
            c = *p_fmt;
            do
            {
                if ((c == 'l') || (c == 'h'))
                {
                    p_fmt++;
                    c = *p_fmt;
                }
                else
                {
                    break;
                }
            } while (1);
            //
            // Handle specifiers
            //
            /*lint -save -e64*/
            switch (c)
            {
                case 'c':
                {
                    char c0;
                    v = va_arg(*p_args, int32_t);
                    c0 = (char)v;
                    buffer_add(p_ctx, c0);
                    break;
                }
                case 'd':
                case 'i':
                    v = va_arg(*p_args, int32_t);
                    int_print(p_ctx,
                              v,
                              10u,
                              NumDigits,
                              FieldWidth,
                              FormatFlags);
                    break;
                case 'u':
                    v = va_arg(*p_args, int32_t);
                    unsigned_print(p_ctx,
                                   (uint32_t)v,
                                   10u,
                                   NumDigits,
                                   FieldWidth,
                                   FormatFlags);
                    break;
                case 'x':
                case 'X':
                    v = va_arg(*p_args, int32_t);
                    unsigned_print(p_ctx,
                                   (uint32_t)v,
                                   16u,
                                   NumDigits,
                                   FieldWidth,
                                   FormatFlags);
                    break;
                case 's':
                {
                    char const * p_s = va_arg(*p_args, const char *);
                    string_print(p_ctx, p_s, FieldWidth, FormatFlags);
                    break;
                }
                case 'p':
                    v = va_arg(*p_args, int32_t);
                    buffer_add(p_ctx, '0');
                    buffer_add(p_ctx, 'x');
                    unsigned_print(p_ctx, (uint32_t)v, 16u, 8u, 8u, 0);
                    break;
                case '%':
                    buffer_add(p_ctx, '%');
                    break;
#if NRF_MODULE_ENABLED(NRF_FPRINTF_DOUBLE)
                case 'f':
                {
                    double dbl = va_arg(*p_args, double);
                    float_print(p_ctx,
                                dbl,
                                NumDigits,
                                FieldWidth,
                                FormatFlags,
                                false);
                    break;
                }
                case 'F':
                {
                    double dbl = va_arg(*p_args, double);
                    float_print(p_ctx,
                                dbl,
                                NumDigits,
                                FieldWidth,
                                FormatFlags,
                                true);
                    break;
                }
#endif
                default:
                    break;
            }
            /*lint -restore*/
            p_fmt++;
        }
        else
        {
            buffer_add(p_ctx, c);
        }
    } while (*p_fmt != '\0');

    if (p_ctx->auto_flush)
    {
        nrf_fprintf_buffer_flush(p_ctx);
    }
}

3.after the buffer it flush

void nrf_fprintf_buffer_flush(nrf_fprintf_ctx_t * const p_ctx)
{
    ASSERT(p_ctx != NULL);

    if (p_ctx->io_buffer_cnt == 0)
    {
        return;
    }

    p_ctx->fwrite(p_ctx->p_user_ctx,
                  p_ctx->p_io_buffer,
                  p_ctx->io_buffer_cnt);
    p_ctx->io_buffer_cnt = 0;
}

but i did not find anything which it called the Uart  when it output the string  

anyone knows?

the reason why om doing this is because i  want to set the uart rx by myself to connect other device 

i found  out p_io_buffer is the buffer which send the message but there are no function later on how did it send?

and i found out after the write command it bump into the function under but how? when did this fuction been called

void nrf_cli_print_stream(void const * p_user_ctx, char const * p_data, size_t data_len)
{
    cli_write((nrf_cli_t const *)p_user_ctx,
              p_data,
              data_len,
              NULL);
}

[awneil]

yu1998 said:

i want to find the function which  put all the  character into a buffer before it output to the uart

also want to know when did the code call the Uart I only found

I find the easiest way to find such things is by stepping in the debugger.

You should be able to set a breakpoint on writing to the buffer.

Easier to do when BLE is not running - otherwise you'll need Monitor Mode Debugging:

devzone.nordicsemi.com/.../193088

[yu1998]

nah my ble is running  but what i want is make the uart rx output in specific devices in my company which i need the buffer and uart rx function

[Vidar Berg]

the reason why om doing this is because i  want to set the uart rx by myself to connect other device 

Do you have to use the same pins/UARTE for this, or would it be an option to use the second UARTE instance with another RX pin? You can use the UART driver to set it up.

 

[yu1998]

   honestly i need to rewrite some specific protocol to connect to the device i know in some sort of  timing  the uart will send the message which is  unreadable to the target and make it readerable i was wondering which function are those  Vidar Berg

[Vidar Berg]

It sounds like something you can use the UART driver for. It's not clear to me why you need to use this with this interactive example, and why you are trying to use the same UART HW for CLI and this custom protocol you have.