[ell-i-developers] Re: How to make serial working?
- From: jigsaw <jigsaw@xxxxxxxxx>
- To: "ell-i-developers@xxxxxxxxxxxxx" <ell-i-developers@xxxxxxxxxxxxx>
- Date: Mon, 2 Jun 2014 09:24:27 +0300
It turns out that stty is not the issue...at least on my old laptop
with Debian installed with kernel 3.2.0-4-amd64.
The only trick that makes all serial working is running minicom with
-o, like this:
minicom -D /dev/ttyUSB0 -o
This command gets no data from serial, but after it is closed, all
other terminals, including gdb remote, can send and receive without
any problem. I dunno why but I'm happy with it...
On Sun, Jun 1, 2014 at 11:18 PM, jigsaw <jigsaw@xxxxxxxxx> wrote:
> Finally get cu working with such stty options:
>
> q5xiao@kifissia:~$ stty -F /dev/ttyUSB0 -a
> speed 0 baud; rows 0; columns 0; line = 0;
> intr = <undef>; quit = <undef>; erase = <undef>; kill = <undef>; eof =
> <undef>; eol = <undef>; eol2 = <undef>; swtch = <undef>; start =
> <undef>;
> stop = <undef>; susp = <undef>; rprnt = <undef>; werase = <undef>;
> lnext = <undef>; flush = <undef>; min = 0; time = 0;
> -parenb -parodd cs8 -hupcl -cstopb -cread -clocal -crtscts
> -ignbrk -brkint -ignpar -parmrk -inpck -istrip -inlcr -igncr -icrnl
> -ixon -ixoff -iuclc -ixany -imaxbel -iutf8
> -opost -olcuc -ocrnl -onlcr -onocr -onlret -ofill -ofdel nl0 cr0 tab0
> bs0 vt0 ff0
> -isig -icanon -iexten -echo -echoe -echok -echonl -noflsh -xcase
> -tostop -echoprt -echoctl -echoke
> q5xiao@kifissia:~$
>
> Seems that not only -crtscts but also -clocal are required.
>
> On Sun, Jun 1, 2014 at 10:15 PM, jigsaw <jigsaw@xxxxxxxxx> wrote:
>> @Teemu I'd like use cu as well. But your solution doesn't seem to work. Do
>> you mean start cu first, then call stty from a 2nd shell, then cu will
>> receive from serial? BTW, it should be "stty -crtscts -F /dev/ttyUSB0", I
>> guess?
>>
>>
>> On Sun, Jun 1, 2014 at 10:03 PM, Teemu Hakala <temmi@xxxxxx> wrote:
>>>
>>> Damn, I totally forgot about that we mangled the rts/cts handshaking.
>>>
>>> I’m traditionally using cu for rs-232 work, setting the line parameters
>>> from another shell
>>> since the tty devices reset their parameters on fclose().
>>>
>>> (shell 1)% cu -l /dev/ttyBLAH
>>> /* serial line traffic goes in here */
>>>
>>> (shell 2)% stty -crtscts /dev/ttyBLAH
>>>
>>> - t
>>>
>>>
>>> On 1.6.2014, at 21:13, Jose Granados Vergara <jose.granados@xxxxxx> wrote:
>>>
>>> I've been using HTerm and Parallax Serial Terminal with Ellduino without
>>> problems.
>>>
>>> -Jose
>>> ________________________________
>>> De: ell-i-developers-bounce@xxxxxxxxxxxxx
>>> [ell-i-developers-bounce@xxxxxxxxxxxxx] en nombre de jigsaw
>>> [jigsaw@xxxxxxxxx]
>>> Enviado: domingo, 01 de junio de 2014 06:59 p.m.
>>> Para: ell-i-developers@xxxxxxxxxxxxx
>>> CC: Teemu Hakala
>>> Asunto: [ell-i-developers] Re: How to make serial working?
>>>
>>> @Pekka OK this is what Ivan and I were trying to figure our during
>>> hackthon. We noticed that only Arduino IDE was able to talk over serial.
>>>
>>> @Jose Thanks for the sample code. I was using same code but wrong GPIO
>>> pin. So how do you get the serial working? By hacking Arduino IDE in the
>>> same way as Pekka said, or you made another customized terminal?
>>>
>>>
>>> On Sun, Jun 1, 2014 at 6:01 PM, Pekka Nikander <pekka.nikander@xxxxxx>
>>> wrote:
>>>>
>>>> The current Ell-i board (Ellduino) Serial requires that you don't pull
>>>> DTR or RTS up(?), IIRC. They are used for reseting the board. If you use
>>>> a
>>>> standard terminal program, that will pull the handshake signals so that the
>>>> board goes to the reset state.
>>>>
>>>> This is one of the things that will be fixed in the next boards.
>>>>
>>>> The issue should be documented here:
>>>>
>>>> https://github.com/Ell-i/Hackathon/wiki/Ellduino-serial-programming-interface
>>>> but as of today, it is not.
>>>>
>>>> Here is how we fix this for the Arduino IDE:
>>>>
>>>>
>>>> https://github.com/Ell-i/Arduino/commit/8748a243f22216370c478d937abc60f03697de4e
>>>>
>>>> --Pekka
>>>>
>>>>
>>>> On 2014–06–01, at 17:00 , Qinglai Xiao <jigsaw@xxxxxxxxx> wrote:
>>>>
>>>> > Hi Teemu,
>>>> >
>>>> > Thanks. Im working with the ell-i board, so the stm32f4 story doesn't
>>>> > really help.
>>>> > Im working at home, so I don't have logic analyser. I can manage to
>>>> > make serial working in a hard way by debugging it with mbed. However it
>>>> > could save a lot of time if someone shares the experience of ell-i +
>>>> > serial. 发件人: Teemu Hakala
>>>> > 发送时间: 2014/6/1 16:47
>>>> > 收件人: ell-i-developers@xxxxxxxxxxxxx
>>>> > 主题: [ell-i-developers] Re: How to make serial working?
>>>> > Hi
>>>> >
>>>> > I relayed this question to #ELL-i IRC channel on the Freenode network
>>>> > and was given a good link to things the software synth winner used as
>>>> > a starting point with the F4 Discovery:
>>>> >
>>>> > http://vedder.se/2012/07/play-mp3-on-the-stm32f4-discovery/
>>>> >
>>>> > Then there’s the usual "is everything properly connected" mantra. Are
>>>> > you working on it at home or with Ivan, ie. do you have access to a
>>>> > logic analyzer?
>>>> >
>>>> > - t
>>>> >
>>>> > On 1.6.2014, at 16:25, jigsaw <jigsaw@xxxxxxxxx> wrote:
>>>> >
>>>> >> Hi,
>>>> >>
>>>> >> I first tried to load elli/Runtime/stm32/tests/test_Serial_write_uint8
>>>> >> to ell-i, but nothing is received in minicom or screen. Then I tried to
>>>> >> manually initialize RCC and USART ( I tried both USART1 and USART2), but
>>>> >> still failed.
>>>> >>
>>>> >>
>>>> >> I'm now trying to port the debugger to ell-i, but without working
>>>> >> serial I can't make it.
>>>> >>
>>>> >> Could anyone give a hand? Has anyone got serial working on ell-i with
>>>> >> minicom or any other common terminal?
>>>> >>
>>>> >> thx &
>>>> >> rgds,
>>>> >> -Qinglai
>>>> >
>>>
>>>
>>
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