Issue with cyw43 firmware loading impacting USB

[peterharperuk]

See micropython/micropython#8904

A few impacts on the sdk?

1. Need to pull in a driver update
2. Need to set CYW43_EVENT_POLL_HOOK in polling adapter
3. While looking at the firmware load time I noticed the big delay in cyw43_spi_reset. I'm not sure why this is needed at all, but getting rid of the sleeps stops firmware loading working. However it looks like 5ms is enough, so 10ms to be safe?

[peterharperuk]

Need to set CYW43_EVENT_POLL_HOOK in polling adapter

Looking at the code - I guess this isn't relevant as an IRQ is used to call tud_task?

[kilograham]

oh, i had assumed you had meant that it needed to be set to empty to compile