Damien George
34e43c7ee9
stmhal: Improve efficiency of SysTick IRQ and HAL_Delay.
...
SysTick IRQ now increases millisecond counter directly (ie without
calling HAL_IncTick). Provide our own version of HAL_Delay that does a
wfi while waiting. This more than halves power consumption when running
a loop containing a pyb.delay call. It used to be like this, but new
version of HAL library regressed this feature.
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