The function is defined inside of a function body which generates a
warning. Circuit Python treats these warnings as errors, and so
refuses to build with debugging enabled:
../../lib/tinyusb/src/device/usbd_control.c: In function 'usbd_control_xfer_cb':
../../lib/tinyusb/src/device/usbd_control.c:195:19: error: nested extern declaration of 'usbd_driver_print_control_complete_name' [-Werror=nested-externs]
195 | extern void usbd_driver_print_control_complete_name(bool (*control_complete) (uint8_t, tusb_control_request_t const *));
| ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
cc1: all warnings being treated as errors
make: *** [../../py/mkrules.mk:55:
build-simmel/lib/tinyusb/src/device/usbd_control.o] Error 1
Move the declaration to the top of the function to silence this warning.
Signed-off-by: Sean Cross <sean@xobs.io>
setup packet can complete together with previous status (in & out).
Always make sure to prepare valid buffer for holding setup packet when
queuing control status.
Changes:
- checking if tx buffer empty interrupt is masked
- process more than one packet in isr
- mask tx buffer empty just after all bytes were written
- use of transmit_fifo_packet instead of transmit_packet
Busy flag was set to true after call to dcd_edpt_xfer().
In some cased it was possible that transfer finished before function
ended.
In this case busy flag could be set to false before it was set to
true.
Then setting it to true after dcd_edpt_xfer() made edpoint busy forever.
This change marks endpoint as busy before transfer is started to
avoid race condition.
For IN endpoints output FIFO is filled in interrupt, therefor before
endpoint is enabled, DIEPTSIZ is set with correct size of packet.
Then endpoint is enabled and FIFO empty interrupt is enabled.
This works fine except for the ZLP. Enabling FIFO empty interrupt
results in interrupt handler being called all the time because
there is nothing to put in the FIFO.
Eventually it ends when IN token is received and empty
packed is transmitted out.
This change does not enable FIFO empty interrupt for ZLP reducing
CPU load.
hathach