CC3120MOD: SPI is working but no WiFi is transmitted

Marvin Gnad

Intellectual 455 points

Part Number: CC3120MOD
Other Parts Discussed in Thread: CC3120,

Hi,

I posted before here: e2e.ti.com/.../690896

The SPI Communication is now working as far as i can see it right with my logic analyzer.

I use the provided functions to set the SSID, password, security type, IP, country code and wlan Mode to AP

But i can not see the SSID with my mobile phone so there must still be a problem.

TI does not release any protocol information for the simplelink devices. But it would be much easier for debugging. Is it possible to get these information?

Is there anything special i have to do?

Maybe i set the sl_start and sl_stop at the wrong positions?

The first i do is sl_start then the complete configuration. After that sl_stop directly followed by sl_start. I check the return value of sl_start at its correctly ROLE_AP

Marvin

over 7 years ago

0 Kevin Allen18 over 7 years ago

TI__Mastermind 45606 points

Hi Marvin,

Have you created sl_Task before calling sl_start? I'd suggest comparing your WiFi related setup to an example in the CC3120 plugin (www.ti.com/.../SIMPLELINK-WIFI-CC3120-SDK-PLUGIN)

Is your CC3120MOD on a custom board? Does your RF section meet the requirements mentioned in the HW design checklist?

http://processors.wiki.ti.com/index.php/CC3120_%26_CC3220_Hardware_Design_Review

Hope this helps,
Kevin

0 Marvin Gnad over 7 years ago in reply to Kevin Allen18

Intellectual 455 points

Hi Kevin,

yes i called the sl_Task before sl_start. Would the spi even work without sl_Task?

I used the example from the thread i posted and adapted it to my platform.

Maybe the antenna Design is wrong. But even directly near the device i cant find the AP.

I could "decode" the SPI communication if i had the protocol and the knowledge how it works.

Marvin

0 Marvin Gnad over 7 years ago in reply to Kevin Allen18

Intellectual 455 points

If i open the wiki page it just says "There is currently no text in this page."

0 Kevin Allen18 over 7 years ago in reply to Marvin Gnad

TI__Mastermind 45606 points

Marvin,

Try the link again. There was a closed parenthesis on the end that was being added to the link.

Can you see your device as an AP on devices other than your phone? Are you able to connect to an AP when the device is a station?

If you skip some of your configuration, like "setting the SSID, password, security type, IP, country code", does the default SSID mysimplelink-XXXXXX show up as an AP?

Best,
Kevin

0 Marvin Gnad over 7 years ago in reply to Kevin Allen18

Intellectual 455 points

Hi Kevin,

my device was a pre production printed "X CC3120 ..." on the device.

But the configuration was corrected i readed everything with sl_WlanGet back and it was configured correctly.

I even used a handheld spectrum analyzer to check if the device is sending something. Even this was true.

In the end I used another PCB and it worked. I never thought that the device was corrupt because the settings are working and even the antenna sends something out.

This thread can be closed now.

Marvin

0 Kevin Allen18 over 7 years ago in reply to Marvin Gnad

TI__Mastermind 45606 points

Hi Marvin,

OK, happy you got something working at least. The PCB you are now using does not have a pre-production device on it I assume?

Thanks,
Kevin

0 Marvin Gnad over 7 years ago in reply to Kevin Allen18

Intellectual 455 points

Hi Kevin,

no the PCB has a normal production device BUT i used another PCB with a pre-production and it is working on that too.

Marvin

Wi-Fi

Wi-Fi forum

CC3120MOD: SPI is working but no WiFi is transmitted