Fix bootloader not replying to SAM-BA commands if USB Reset happens #638
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Steps to reproduce: a) power up the board cold from a separate power supply, b) plug in board to PC with USB cable, run bossac to say to hello to the Arduino; all good so far; c) now unplug and replug the USB cable, while keeping the board powered, d) notice that USB re-enumeration takes place OK, the device is still detected just fine by the PC; e) however, if you now run bossac, it just hangs and gets no reply; This is because the `read_job` flag does not get reset back to `false` when a USB Reset event occurs.
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Steps to reproduce:
a) power up the board cold from a separate power supply,
b) plug in board to PC with USB cable, run bossac to say to hello to the Arduino; all good so far;
c) now unplug and replug the USB cable, while keeping the board powered,
d) notice that USB re-enumeration takes place OK, the device is still detected just fine by the PC;
e) however, if you now run bossac, it just hangs and gets no reply;
This is because the
read_jobflag does not get reset back tofalsewhen a USB Reset event occurs.