raspberrypi: Make port_idle_until_interrupt work #7201
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This needs thorough testing before it's merged, as we tried and reverted this once before (adafruit#5341 and adafruit#5356). I think that besides checking for tinyusb having "something to do", the fact that `port_interrupt_after_ticks` and `port_disable_tick` weren't implemented that was causing a secondary problem. I've tested this on a pico w over reboot-cycles and ctrl-c-cycles, with and without drive automounting, with and without serial repl open, and on a power-only connection. I didn't notice the problem reported in adafruit#5356 after merely implementing port_idle_until_interrupt; but I did notice that sleeps in general would take over-long until "something" (like writing to the USB drive) happened; I think "something" was probably calling port_enable_tick(). When this problem was happening, sleeps would take a lot longer; for instance, `sleep(.001)` would take about 1/20s and `sleep(.1)` would take about 1/7s.
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@Neradoc @microdev1 @urish if any of you have time & interest in testing out this branch it would be helpful! |
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What kind of help do you need w/testing? |
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Just general testing, as the earlier occasion when we tried to enable WFI for light sleeping problems cropped up that the original submitter didn't find right away. I tried to test a number of scenarios that would "cover" normal usage but one always misses something... |
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This looks fine to me. I'm happy to test in |
tannewt
approved these changes
Nov 15, 2022
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This needs thorough testing before it's merged, as we tried and reverted this once before (#5341 and #5356).
I think that besides checking for tinyusb having "something to do", the fact that
port_interrupt_after_ticksandport_disable_tickweren't implemented that was causing a secondary problem.I've tested this on a pico w over reboot-cycles and ctrl-c-cycles, with and without drive automounting, with and without serial repl open, and on a power-only connection.
I didn't notice the problem reported in #5356 after merely implementing port_idle_until_interrupt; but I did notice that sleeps in general would take over-long until "something" (like writing to the USB drive) happened; I think "something" was probably calling port_enable_tick(). When this problem was happening, sleeps would take a lot longer; for instance,
sleep(.001)would take about 1/20s andsleep(.1)would take about 1/7s.Closes: #5331