Wire.requestFrom() differences AVR / SAMD

[extrapixel]

Repeated calls to beginTransmission()/ write() / endTransmission() / requestFrom() behaves differently on AVR and SAM. I think they should either:

• behave the same
  or
• be documented properly

On UNO:
Wire.requestFrom(XxXX, n);
if the received data is shorter than 'n' or not all data is read via Wire.read(), the Wire.available() buffer is empty in the next iteration.

on ZERO
Wire.requestFrom(XxXX, n);
if the received data is shorter than 'n' or not all data is read via Wire.read(), the Wire.available() buffer is not empty, but padded with '0' characters up to 32 bytes and these stay in the buffer even in the next iteration

(same for IDE 1.6.6 and 1.6.8 hourly 2015/12/21 04:13 )

[sandeepmistry]

@extrapixel thanks for reporting, since the issue is related to the Zero, I've moved it to the SAMD core repo:

arduino/ArduinoCore-samd#91