snip.scan app halt after first scan

NiUs_2890976 · ‎Feb 28, 2019

Hello!

I ported WICED SDK 6.1 code to the Cortex-A9.

Hardware:

my own (ARM Cortex-A9 + Murata 1DX module with BCM4343W)
bus SDIO

I made the changes based on this article:

Bluetooth works fine.

but:

I'm trying to run a snip scan.

The initialization is fine, successfull firmware download 4343WA1.bin and 4343WA1.clm_blob.

It prints a list of access points, but only once.

The function wiced_scan_result_handler() receives the argument result_ptr = NULL.

I added an argument NULL check.

...
  if (result_ptr == NULL || *result_ptr == NULL)
  {
     PRINT("[%s] LINE = %d result_ptr 0x%X", __FUNCTION__, __LINE__, result_ptr);
     wwd_print_stats(WICED_FALSE); //TEST
     return;
  }
...

After that it hangs on:

wiced_rtos_get_semaphore(&scan_data.semaphore, WICED_WAIT_FOREVER);

in function application_start()

Log in attached.

I added debug messages like this article.

What could be my problem?

Thanks.

NiUs_2890976 · ‎Mar 05, 2019

I found a solution to my problem.

In the folder apps/wwd/scan there is a scanning application and in my case it works fine. I compared it with apps/snip/scan to find any differences. The scan_results_handler() function from wwd checks result_ptr for NULL as follows.

     ...
    if (result_ptr == NULL)
    {
        / * finished * /
        result_buff [result_buff_write_pos] .channel = 0xff;
        host_rtos_set_semaphore (& num_scan_results_semaphore, WICED_FALSE);
        return;
    }
     ...

And in the main thread app_main() in the loop there is a check.

            ...
            / * TODO: change 0xff to a defined flag * /
            if (record-> channel == (uint8_t) 0xff)
            {
                / * Scan completed * /
                break;
            }
            ...

Which is missing from apps/snip/scan app. With this the scan works fine.

Judging by the "TODO ..." comment this code is a workaround. Maybe there is a way to do it right.

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snip.scan app halt after first scan

snip.scan app halt after first scan

Re: snip.scan app halt after first scan