okay, so i tried the old program but with 250 miliseconds and Baudrate of
115200 and have connected a button to a pin and ground. When i push the
button, the signal gets recognized but it flickers on and off. This is also
only ment for Buttons to start/stop a program and maybe some switches for
special stuff, which does not require realtime (for example flood or switch
for toolchanger to let the machine know if the pneumatic piston is in the
correct position)
Am Freitag, 7. Juli 2017 12:53:22 UTC+2 schrieb Schooner:
>
>
> On 06/07/17 22:02, Sag ich Dir nich wrote:
>
> the Code they came up with is:
>
> void setup() {
> for (uint8_t pin = 14; pin < 14 + 32; pin++) {
> pinMode(pin, INPUT_PULLUP);
> }
> Serial.begin(250000);
> }
>
> void loop() {
> static unsigned long iterations;
> static unsigned long lastSecond;
> unsigned long topLoop = millis();
> iterations++;
> uint8_t pin = 14;
> for (uint8_t bytes = 0; bytes < 4; bytes++) {
> uint8_t eightBits = 0;
> for (uint8_t bits = 0; bits < 8; bits++) {
> bitWrite(eightBits, bits, !digitalRead(pin++)); // HIGH als 0, LOW
> als 1
> }
> if (eightBits < 16) {
> Serial.write('0');
> }
> Serial.print(eightBits, HEX);
> }
> Serial.println();
> if (topLoop - lastSecond >= 1000) {
> Serial.print(iterations);
> Serial.println(F(" / second"));
> iterations = 0;
> lastSecond = topLoop;
> }
> }
>
> the Arduino will spit out over 2000 times every second
>
>
> That is fine for a theoretical figure from an arduino which has nothing to
> do except output data,
> data which it has no idea as to whether it will be received or not.
>
> On a computer running an operating system, with a realtime pre-emptive
> scheduling kernel, running an existing realtime application
> (machinekit), where the receipt of the data is important, things are quite
> different
>
> Look at your servo thread speed and work out how many times the realtime
> thread polls a second .
> 1,000,000 / 100,000 ?
> 10 ?
>
> This component is userspace and the kernel priority given to it will not
> get anywhere near the realtime modules.
> Add to that, this is not serial, but UART, serial over USB, USB timing
> being uncertain at best and not guaranteed,
> which is why it is not used for anything in realtime.
>
> I would suggest you increase the baud rate to 115200 and the wait time to
> .25 seconds and try that.
>
> The other option is to check what is sent to see if it has changed from
> the last packet, if not , either don't send it,
> or skip over it at the receiving end.
> That will prevent constantly updating pins which don't need changing,
> saving processor time and preventing pulsing.
>
> Am Donnerstag, 6. Juli 2017 09:56:42 UTC+2 schrieb Schooner:
>>
>>
>> On 05/07/17 22:01, Sag ich Dir nich wrote:
>> > how responsive were your inputs? mine take a couple of seconds,
>> > sometimes dont even get recognized and sometimes are recognized but i
>> > have not pushed the button
>> >
>> It was just an example of how to transfer the data from arduino to HAL,
>> plenty of scope for tuning.
>>
>> The baud rate is probably set at B9600
>> You can increase this up to B115200 with the arduino, just make sure
>> both ends are set the same.
>>
>> Then look at the delay() in the arduino script and usleep() in the
>> component
>> They are both set to quite long periods (1 sec - ie 1000ms and 1000000us
>> respectively)
>>
>> This could be reduced without impacting performance too much, depends
>> what else is going on.
>>
>> Time to start learning what the code does I'm afraid. The arduino IDE
>> is a pretty easy way to get into C / C++.
>>
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