Master LinkUSB problem.

[strike56]

Hi.

In first, thank you very much for this library!

On master DS9490R all work fine, without problem. But today I change my master to LinkUSB... And unfortunately all arduino devices disappeared from network (real 1wire devices still present without problem).

Where may be problem??

[orgua]

Some masters are not timing-conform. most ow-sensors / devices do not rely on this strict timing defined by maxim. so they seem to work better. i have already eased these rules, but need feedback from you. i don't own a linkUSB. is it possible to get a capture of the data line with the real sensors talking?

[strike56]

Unfortunately I can't capture real sensors talking. But I make some debuging response. I change function "recvBit" (add debug points)

============================

bool OneWireHub::recvBit(void) { Serial.println("===="); Serial.println(od_mode); noInterrupts(); // Wait for bus to rise HIGH, signaling end of last timeslot timeOW_t retries = ONEWIRE_TIME_SLOT_MAX[od_mode]; Serial.println(retries); while (!(DIRECT_READ(pin_baseReg, pin_bitMask)) && (--retries)); Serial.println(retries); if (!retries) { _error = Error::RESET_IN_PROGRESS; interrupts(); return true; }; retries = ONEWIRE_TIME_MSG_HIGH_TIMEOUT; Serial.println(retries); while ((DIRECT_READ(pin_baseReg, pin_bitMask)) && (--retries)); Serial.println(retries); if (!retries) { _error = Error::AWAIT_TIMESLOT_TIMEOUT_HIGH; interrupts(); return true; }; retries = ONEWIRE_TIME_READ_MIN[od_mode]; Serial.println(retries); while (!(DIRECT_READ(pin_baseReg, pin_bitMask)) && (--retries)); Serial.println(retries); return (retries > 0); };

============================

And here is responses

From DS9490R (example):

0 166 166 18461 18384 24 24

And from LinkUSB (always)

0 166 166 18461 0

[orgua]

did you make any progress with your problem?

[orgua]

seems to be related to #23 try to 10x the value ONEWIRE_TIME_MSG_HIGH_TIMEOUT in OneWireHub_config.h

[strike56]

Ooooo YEEESS !!! I set this value to 150000_us. And now all work fine on LinkUSB too... Thank you very match! :-)

[orgua]

Nice to know! If you ever have the chance to capture the communication with a logic analyser please let me know.

For documentation - I won't increase this value by default, because:

• yes, this behaviour is allowed for OW, but rather unusual
• this will very much increase the time the controller spends in hub.poll(), often without reason. and leaves less time to do other things
• i made a note in the readme under section "help"