Re: [issue] Arrow key can't be read on tty terminal in release build

[Haojian Zhuang <haojian.zhuang@linaro.org>]

On 7 February 2018 at 23:52, Ard Biesheuvel <ard.biesheuvel@linaro.org> wrote:
>
>> On 7 Feb 2018, at 15:50, Haojian Zhuang <haojian.zhuang@linaro.org> wrote:
>>
>> Hi all,
>>
>> I have an issue on tty terminal. I setup PL011 serial console as the
>> tty terminal on HiKey platform. When it's built in debug mode, arrow
>> key works well. When it's built in release mode, arrow key can't work.
>>
>> For example, DOWN key is gotten in terminal with "~[B" value in debug
>> build. DOWN key is gotten in terminal with "~" value in release build.
>> These values are fetched by GetOneKeyFromSerial().
>>
>> But I can't find any difference on PL011 serial driver between debug
>> and release mode.
>>
>> Do you have any idea on this?
>>
>>
>
> You need to set the FIFO depth to 16 iirc

I think you mean the initialization code in PL011UartInitializePort ().

  HardwareFifoDepth = (PL011_UARTPID2_VER (MmioRead32 (UartBase + UARTPID2)) \
                       > PL011_VER_R1P4) \
                      ? 32 : 16 ;

I tried to hardcode the value with both 32 and 16. The issue still exists.

Best Regards
Haojian