We are Using MQX RTOS for our custom board based on MK60DN512ZLVQ10 series of Kinetis ARM Cortex-M MCUs. We have developed our application based on MQX 3.7 RTOS for our custom board and its working fine But we need to migrate from MQX3.7 to MQX 188.8.131.52. We have ported from MQX3.7 to MQX 184.108.40.206 and our application to MQX 220.127.116.11. But we are facing issue with _io_doprint function.
The printf function is working fine as we are able to see data over the serial terminal.
Is there any implementation difference between the function is version 3.7 and 18.104.22.168.
Can you please help us with the same?