always idle interrupt

[Jython]

the idle flag is not cleared , so does it relate to code optimizations?
how to make it O0

On Tue, Apr 16, 2019 at 3:08 PM Jython <googcheng at gmail.com> wrote:

> HI, ALL!
>   the stm32 usart2 code is here
> https://gist.github.com/goog/3da34a64eff11902579df333cfd1d863
> why it always enter the idle interrupt and printk log outputs
> i almost could not find the error point, someone of you would help me?
>
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