I have found an issue with the telnet demos with MQX 4.0.
TWR-K60N512 + TWR-SER
Compiler: IAR V6.40
Libraries compiled with debug enabled, with ttyd: as serial port (using the serial port on the TWR-SER)
The secure telnet demo (C:\Freescale\Freescale_MQX_4_0\demo\security_telnet\iar) does not work.
It prints out about 8 characters at a rate of about 2 characters per second, then stops.
The telnet-to-serial demo is also slow, but not as severe as the secure telnet demo.
I tested these programs with MQX 3.8 and it works as expected.
So there is an issue with MQX 4.0.
I also tested the hvac demo with MQX 4.0 and it seems to work OK.