I am using kinetis kl25z controller and CW10.3 IDE for my project.
In events.c file, I have called a function(uart_tx) that sends the data over UART. uart_tx() is getting blocked for uart transmission interrupt.
I guess the problem was due to disabling of nested interrupts. Your information regarding how to enable nested interrupts in CW10.3
for kl25z will be helpful for me