DNS makes MQX tasks hang on M52259DEMO

[jhmrd]

I am trying to use DNS on the M52259DEMO board. I have been able to get the gateway and DNS IP addresses set via DHCP, as shown by the ipconfig command. I defined RTCSCFG_ENABLE_UDP and RTCSCFG_ENABLE_DNS as 1 in user_config.h, then rebuilt all of MQX. I also had to move the #if RTCSCFG_ENABLE_DNS after some #includes in a few source files to get rid of some link errors.

Now I can ping IP addresses out on the internet as long as I enter the explicit dotted quad IP address I want to ping. But as some as I try to ping a domain name, I get no response, and the serial shell and telnet stop responding. 

Any ideas?

Thanks

[PetrM · Accepted solution]

Hello,

please get latest release, where you can try to use lwdns feature now.

You just need to define RTCSCFG_ENABLE_LWDNS 1 in your user_config.h.

It works over either UDP or TCP.

Regards,

PetrM

[jhmrd]

You are correct. DNS works without a bunch of code changes in the MQX 3.1 release.