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stm32: Change from systick to soft-timer for BT scheduling, and improve BTstack run loop #7284

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Merged
merged 4 commits into from
Jun 23, 2021
Merged

stm32: Change from systick to soft-timer for BT scheduling, and improve BTstack run loop #7284

merged 4 commits into from
Jun 23, 2021

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@dpgeorge dpgeorge commented May 19, 2021 •
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In this PR:

  • Add soft_timer_reinsert() helper function.
  • Change from systick to soft-timer for BT scheduling. Instead of using systick the BT subsystem is now scheduled using a soft timer. This means it is scheduled only when it is enabled.
  • Provide an efficient, custom BTstack runloop. It reschedules the BT HCI poll soft timer so that it is called exactly when the next timer expires.

TODO:

  • more testing with combinations of NimBLE, BTstack, sync/non-sync BLE events, and WB55 boards

@dpgeorge dpgeorge force-pushed the stm32-btstack-runloop branch 2 times, most recently from a012613 to 05a78eb Compare May 20, 2021 02:29
@dpgeorge dpgeorge force-pushed the stm32-btstack-runloop branch 2 times, most recently from d874890 to 1ca851b Compare June 22, 2021 02:38
dpgeorge added 4 commits June 23, 2021 13:14
@dpgeorge
stm32/softtimer: Add soft_timer_reinsert() helper function.
60f1f76 
And call mp_pairheap_init_node() in soft_timer_static_init() so that
reinsert can be called after static_init.

Signed-off-by: Damien George <damien@micropython.org>
@dpgeorge
stm32/mpbthciport: Change from systick to soft-timer for BT scheduling.
74c2c31 
Instead of using systick the BT subsystem is now scheduled using a soft
timer.  This means it is scheduled only when it is enabled.

Signed-off-by: Damien George <damien@micropython.org>
@dpgeorge
stm32: Provide a custom BTstack runloop that integrates with soft timer.
38bc5a9 
It reschedules the BT HCI poll soft timer so that it is called exactly when
the next timer expires.

Signed-off-by: Damien George <damien@micropython.org>
@dpgeorge
extmod/btstack: Add missing call to mp_bluetooth_hci_uart_deinit.
0fc0f75 
Signed-off-by: Damien George <damien@micropython.org>
@dpgeorge dpgeorge force-pushed the stm32-btstack-runloop branch from 1ca851b to 0fc0f75 Compare June 23, 2021 03:32
@dpgeorge dpgeorge merged commit 0fc0f75 into micropython:master Jun 23, 2021
@dpgeorge dpgeorge deleted the stm32-btstack-runloop branch June 23, 2021 04:00
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