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CAN.listen: block until a message comes in or timeout is reached

This commit is contained in:
Jeff Epler 2020-09-21 16:06:17 -05:00
parent 9e8f1820c8
commit 493679da3b
1 changed files with 7 additions and 9 deletions
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16
shared-bindings/_canio/Listener.c
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@ -100,20 +100,18 @@ STATIC mp_obj_t canio_listener_iter(mp_obj_t self_in) {
STATIC MP_DEFINE_CONST_FUN_OBJ_1(canio_listener_iter_obj, canio_listener_iter);
//| def __next__(self):
//| """Returns the next waiting message, if one is available
//| """Reads a message, after waiting up to self.timeout seconds
//|
//| If the object is deinitialized, raises ValueError.
//|
//| If no message is waiting raises StopIteration"""
//| If no message is received in time, raises StopIteration. Otherwise,
//| a Message is returned."""
//| ...
//|
STATIC mp_obj_t canio_listener_next(mp_obj_t self_in) {
canio_listener_obj_t *self = MP_OBJ_TO_PTR(self_in);
common_hal_canio_listener_check_for_deinit(self);
if (common_hal_canio_listener_in_waiting(self)) {
return canio_listener_read(self_in);
}
mp_obj_t result = canio_listener_read(self_in);
if (result == mp_const_none) {
return MP_OBJ_STOP_ITERATION;
}
return result;
}
STATIC MP_DEFINE_CONST_FUN_OBJ_1(canio_listener_next_obj, canio_listener_next);