Hi, Ytai. Thanks, The code is finally working now. Now I'm trying to add a
calculation function by using the uart input. I dont know this is the
correct way to do it or not. It can works sometimes but not efficient and
sometimes not working.
my code is as following
public void loop() throws ConnectionLostException, InterruptedException {
double value1;
double result;
String line;
try {
line = reader_.readLine();
if (line != null) {
setText(line);
value1 = Double.parseDouble(line);
result = (value1 + 1) * 360 / 8192 ;
String angle = Double.toString(result);
angle_.setText(angle);
}
} catch (IOException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
}
On Fri, Jan 10, 2014 at 10:18 AM, Ytai Ben-Tsvi <[email protected]> wrote:
> Your convertStreamToString() function hangs in a loop until the stream is
> closed, and keeps appending new lines to the string until it does. Then,
> the IOIO disconnects and readLine() finally returns null and your function
> exits and you get a really long string.
> What you probably want is along the lines of:
>
> class Looper {
> ...
> private BufferedReader reader_;
> ...
> void setup() {
> ...
> reader_ = new BufferedReader(new
> InputStreamReader(uart.getInputStream()));
> ...
> }
>
> void loop() {
> String line = reader_.readLine();
> if (line != null) {
> setText(line);
> }
> }
>
>
>
> On Thu, Jan 9, 2014 at 3:04 AM, Synn Yong Tan <[email protected]> wrote:
>
>> Hi, Ytai. The following is my code. Another problem is the strings only
>> display after the IOIO's power supply is disconnected.
>>
>> package ioio.examples.simple;
>>
>>
>> import java.io.BufferedReader;
>>
>> import java.io.IOException;
>> import java.io.InputStream;
>> import java.io.InputStreamReader;
>> import ioio.lib.api.Uart;
>> import ioio.lib.api.IOIO;
>> import ioio.lib.api.exception.ConnectionLostException;
>> import ioio.lib.util.BaseIOIOLooper;
>> import ioio.lib.util.IOIOLooper;
>> import ioio.lib.util.android.IOIOActivity;
>> import android.os.Bundle;
>> import android.widget.TextView;
>>
>> public class IOIOSimpleApp extends IOIOActivity {
>> private TextView textView_;
>> @Override
>> public void onCreate(Bundle savedInstanceState) {
>> super.onCreate(savedInstanceState);
>> setContentView(R.layout.main);
>>
>> textView_ = (TextView)findViewById(R.id.TextView);
>> }
>>
>> class Looper extends BaseIOIOLooper {
>> private Uart input_;
>> @Override
>> public void setup() throws ConnectionLostException {
>> input_ = ioio_.openUart(6, 7, 19200, Uart.Parity.NONE,
>> Uart.StopBits.ONE);
>> }
>>
>> @Override
>> public void loop() throws ConnectionLostException, InterruptedException
>> {
>> InputStream in = input_.getInputStream();
>> String reading = convertStreamToString(in);
>> setText(reading);
>> }
>> }
>>
>> @Override
>> protected IOIOLooper createIOIOLooper() {
>> return new Looper();
>> }
>>
>> private String convertStreamToString(InputStream reading){
>> BufferedReader rd=new BufferedReader(new
>> InputStreamReader(reading),4096);
>> String line;
>> StringBuilder sb=new StringBuilder();
>> try {
>> while ((line = rd.readLine()) != null) {
>> sb.append(line);
>> }
>> rd.close();
>> }catch (IOException e) {
>> e.printStackTrace();
>> }
>> String contentOfMyInputStream = sb.toString();
>> return contentOfMyInputStream;
>> }
>> private void setText (final String str) {
>> runOnUiThread(new Runnable() {
>> @Override
>> public void run() {
>> textView_.setText(str);
>> }
>> });
>> }
>> }
>>
>>
>> On Thu, Jan 9, 2014 at 5:55 PM, Ytai Ben-Tsvi <[email protected]> wrote:
>>
>>> setText() on a TextView replaced any previous text it displays. Try to
>>> run IOIOSimpleApp and see. If you still can't solve your problem, please
>>> share your code.
>>> On Jan 9, 2014 1:50 AM, "Synn Yong Tan" <[email protected]> wrote:
>>>
>>>> Hi, Ytai..
>>>> I did use the IOIOsimpleApp as my example. and it able to display. The
>>>> problem now is the string keep on display until the whole screen is
>>>> occupied.
>>>> What i want is just display the latest string only by replacing the
>>>> previous input stream.
>>>> How should i do this or any example for me to refer ?
>>>>
>>>>
>>>> On Thu, Jan 9, 2014 at 4:46 PM, Ytai Ben-Tsvi <[email protected]> wrote:
>>>>
>>>>> See IOIOSimpleApp as an example: from your thread that reads the
>>>>> encoder, you can pass the string you want to display to the main task
>>>>> using
>>>>> runOnUiThread, and it will then get displayed on a TextView that you can
>>>>> assign for it.
>>>>>
>>>>>
>>>>> On Wed, Jan 8, 2014 at 11:30 PM, Synn Yong Tan <[email protected]>wrote:
>>>>>
>>>>>> Hi, there,
>>>>>> my apps is working now. But there is a problem, how should i do so
>>>>>> that my apps only display the latest string as the encoder continuous
>>>>>> send
>>>>>> string to my phone.
>>>>>>
>>>>>>
>>>>>> On Friday, January 3, 2014 1:31:47 PM UTC+8, Ytai wrote:
>>>>>>
>>>>>>> Either your battery is finished or there's a short circuit somewhere.
>>>>>>> In general a 9V battery isn't a great idea for the IOIO, since it
>>>>>>> will typically not be able to source enough current to maintain
>>>>>>> charging of
>>>>>>> the Android. LiPo packs are a great choice for battery powered
>>>>>>> applications.
>>>>>>>
>>>>>>>
>>>>>>> On Thu, Jan 2, 2014 at 7:09 AM, Synn Yong Tan <[email protected]>wrote:
>>>>>>>
>>>>>>>> Hi,
>>>>>>>> I used a 9v battery as the power supply of my IOIO OTG. The problem
>>>>>>>> comes when i connect my IOIO board with UART to RS232 converter on the
>>>>>>>> 5v
>>>>>>>> pin and gnd, there is no power supply for the IOIO board. What is the
>>>>>>>> problem that caused this ? OR what are the potential reasons caused
>>>>>>>> this ?
>>>>>>>>
>>>>>>>>
>>>>>>>> On Thu, Dec 19, 2013 at 9:44 PM, Synn Yong Tan <[email protected]>wrote:
>>>>>>>>
>>>>>>>>> I see. Then i have to try it out 1st because i just tried the led
>>>>>>>>> part without connecting the encoder.
>>>>>>>>> Thanks for your help, Ytai.
>>>>>>>>> This is a very good discussion groups for all IOIO-users.
>>>>>>>>>
>>>>>>>>>
>>>>>>>>> On Thu, Dec 19, 2013 at 12:11 AM, Ytai Ben-Tsvi
>>>>>>>>> <[email protected]>wrote:
>>>>>>>>>
>>>>>>>>>> Yes. But what I meant is that your UART didn't get any readings
>>>>>>>>>> (that's why your program got stuck), so there's probably something
>>>>>>>>>> else
>>>>>>>>>> going wrong there.
>>>>>>>>>>
>>>>>>>>>>
>>>>>>>>>> On Wed, Dec 18, 2013 at 5:21 AM, Synn Yong Tan
>>>>>>>>>> <[email protected]>wrote:
>>>>>>>>>>
>>>>>>>>>>> The code is working until i added the UART part into it. So
>>>>>>>>>>> means, i just have to separate them into two thread instead of one
>>>>>>>>>>> single
>>>>>>>>>>> thread ?
>>>>>>>>>>>
>>>>>>>>>>>
>>>>>>>>>>> On Wed, Dec 18, 2013 at 9:12 AM, Ytai Ben-Tsvi <[email protected]
>>>>>>>>>>> > wrote:
>>>>>>>>>>>
>>>>>>>>>>>> A separate thread might make sense in this case, since it will
>>>>>>>>>>>> allow you to keep the code simple (as opposed to having to
>>>>>>>>>>>> assemble strings
>>>>>>>>>>>> out of fragmented readings).
>>>>>>>>>>>> Having said that, if your original program got stuck, a
>>>>>>>>>>>> separate thread wouldn't fix that (it will get stuck too), so you
>>>>>>>>>>>> might
>>>>>>>>>>>> have another problem.
>>>>>>>>>>>>
>>>>>>>>>>>>
>>>>>>>>>>>> On Tue, Dec 17, 2013 at 9:05 AM, Synn Yong Tan <
>>>>>>>>>>>> [email protected]> wrote:
>>>>>>>>>>>>
>>>>>>>>>>>>> I want to get feedback of an absolute encoder through the
>>>>>>>>>>>>> uart. Means I separate the inputstream and the led to two thread?
>>>>>>>>>>>>> On 18 Dec 2013 00:57, "Ytai Ben-Tsvi" <[email protected]>
>>>>>>>>>>>>> wrote:
>>>>>>>>>>>>>
>>>>>>>>>>>>>> readLine() will block until a new line sequence appears on
>>>>>>>>>>>>>> the input. If you want to do that, you'll have to run it on a
>>>>>>>>>>>>>> separate
>>>>>>>>>>>>>> thread. What are you *really* trying to achieve?
>>>>>>>>>>>>>>
>>>>>>>>>>>>>>
>>>>>>>>>>>>>> On Tue, Dec 17, 2013 at 8:47 AM, Synn Yong Tan <
>>>>>>>>>>>>>> [email protected]> wrote:
>>>>>>>>>>>>>>
>>>>>>>>>>>>>>> ya. the example code works, I also found that the UART
>>>>>>>>>>>>>>> part gt problem after i tried it part by part.
>>>>>>>>>>>>>>> But i have no clue for it. Any clue or guide for me to
>>>>>>>>>>>>>>> correct the code?!
>>>>>>>>>>>>>>> Thanks for your kind help.
>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>> On Wed, Dec 18, 2013 at 12:41 AM, Ytai Ben-Tsvi <
>>>>>>>>>>>>>>> [email protected]> wrote:
>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>> Your code is stuck waiting on the UART. Did you get the
>>>>>>>>>>>>>>>> example code working?
>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>> On Tue, Dec 17, 2013 at 5:15 AM, Synn Yong Tan <
>>>>>>>>>>>>>>>> [email protected]> wrote:
>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>>> yea. my apps actually works for the ori version of IOIO
>>>>>>>>>>>>>>>>> sample app. But after i edited the code as the code i posted
>>>>>>>>>>>>>>>>> above, then
>>>>>>>>>>>>>>>>> the led light cannot turn on.
>>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>>> On Tue, Dec 17, 2013 at 9:07 PM, Matanel <
>>>>>>>>>>>>>>>>> [email protected]> wrote:
>>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>>>> Did you download 3.3v firmware of IOIOLibs??
>>>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>>>> בתאריך יום שני, 16 בדצמבר 2013 14:39:58 UTC+2, מאת Synn
>>>>>>>>>>>>>>>>>> Yong Tan:
>>>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>>>>> Hi,
>>>>>>>>>>>>>>>>>>> This is my 1st try on IOIO. I done everything according
>>>>>>>>>>>>>>>>>>> to the OIOI OTG Beginners Guide. But when i toggled the
>>>>>>>>>>>>>>>>>>> button, the led on
>>>>>>>>>>>>>>>>>>> IOIO board didn't light up.
>>>>>>>>>>>>>>>>>>> Any ideas what caused this problem ? Anyone has the
>>>>>>>>>>>>>>>>>>> solution for this ? Or how to debug it ?
>>>>>>>>>>>>>>>>>>> Secondly is the conversion to dalvik format failed with
>>>>>>>>>>>>>>>>>>> error 1. I can export the project into apk file for the 1st
>>>>>>>>>>>>>>>>>>> time. But the
>>>>>>>>>>>>>>>>>>> second time I try to export the project, this error comes
>>>>>>>>>>>>>>>>>>> out.
>>>>>>>>>>>>>>>>>>> Anyone knows what is the problem caused this error and
>>>>>>>>>>>>>>>>>>> how to solve it ?
>>>>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>>>>> Thanks for your help.
>>>>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>>>> --
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