SGPIO deadline check #1510
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SGPIO deadline check #1510
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martinling
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Counter-intuitively, this actually saves us two cycles because we unroll the first iteration of the loop that spins on the interrupt flag, saving a branch in the case that the flag is clear the first time.
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Checks whether the M0 core missed its deadline: i.e. if the next SGPIO interrupt already occurred by the time it finished processing the last one.
If so, the M0 returns to the idle mode with an error code in the M0 state. This should cause the host tools to time out, at which point the error can be checked with
hackrf_debug -S.