Robert Nevett

Protect QSPY TX Buffer During QSPY RX

I've noticed that the QSPY TX buffer can end up in a bad state. This would manifest as the QS_priv_.head and QS_priv_.tail counters becoming permanently out of sync and QSPY TX data would always be outputting data from the past. This problem was correlated with QS_RX messages coming into the system just before a QTimeEvt fired. When tracing the problem, I noticed that the following functions were being pre-empted when our 1kHz tick fired and triggered a QTimeEvt, thus waking an AO: QS_rxReportAck_...