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stmhal/can: Allow to get existing CAN obj if constructed without args.

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Initialisation of CAN objects should now behave as other peripheral
objects.

Fixes issue #2001.
This commit is contained in:
Henrik Sölver 2016-05-06 19:11:49 +02:00 committed by Damien George
parent 87106d025b
commit c4587e2426
2 changed files with 40 additions and 22 deletions
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61
stmhal/can.c
View file

@ -343,44 +343,61 @@ STATIC mp_obj_t pyb_can_make_new(const mp_obj_type_t *type, mp_uint_t n_args, mp
// check arguments
mp_arg_check_num(n_args, n_kw, 1, MP_OBJ_FUN_ARGS_MAX, true);
// create object
pyb_can_obj_t *o = m_new_obj(pyb_can_obj_t);
o->base.type = &pyb_can_type;
o->is_enabled = false;
// work out port
o->can_id = 0;
mp_uint_t can_idx;
if (MP_OBJ_IS_STR(args[0])) {
const char *port = mp_obj_str_get_str(args[0]);
if (0) {
#ifdef MICROPY_HW_CAN1_NAME
} else if (strcmp(port, MICROPY_HW_CAN1_NAME) == 0) {
o->can_id = PYB_CAN_1;
can_idx = PYB_CAN_1;
#endif
#ifdef MICROPY_HW_CAN2_NAME
} else if (strcmp(port, MICROPY_HW_CAN2_NAME) == 0) {
o->can_id = PYB_CAN_2;
can_idx = PYB_CAN_2;
#endif
} else {
nlr_raise(mp_obj_new_exception_msg_varg(&mp_type_ValueError, "CAN port %s does not exist", port));
nlr_raise(mp_obj_new_exception_msg_varg(&mp_type_ValueError, "CAN(%s) does not exist", port));
}
} else {
o->can_id = mp_obj_get_int(args[0]);
can_idx = mp_obj_get_int(args[0]);
}
o->rxcallback0 = mp_const_none;
o->rxcallback1 = mp_const_none;
MP_STATE_PORT(pyb_can_obj_all)[o->can_id - 1] = o;
o->rx_state0 = RX_STATE_FIFO_EMPTY;
o->rx_state1 = RX_STATE_FIFO_EMPTY;
if (n_args > 1 || n_kw > 0) {
// start the peripheral
mp_map_t kw_args;
mp_map_init_fixed_table(&kw_args, n_kw, args + n_args);
pyb_can_init_helper(o, n_args - 1, args + 1, &kw_args);
if (can_idx < 1 || can_idx > MP_ARRAY_SIZE(MP_STATE_PORT(pyb_can_obj_all))) {
nlr_raise(mp_obj_new_exception_msg_varg(&mp_type_ValueError, "CAN(%d) does not exist", can_idx));
}
return o;
pyb_can_obj_t *self;
if (MP_STATE_PORT(pyb_can_obj_all)[can_idx - 1] == NULL) {
self = m_new_obj(pyb_can_obj_t);
self->base.type = &pyb_can_type;
self->can_id = can_idx;
self->is_enabled = false;
MP_STATE_PORT(pyb_can_obj_all)[can_idx - 1] = self;
} else {
self = MP_STATE_PORT(pyb_can_obj_all)[can_idx - 1];
}
if (!self->is_enabled || n_args > 1) {
if (self->is_enabled) {
// The caller is requesting a reconfiguration of the hardware
// this can only be done if the hardware is in init mode
pyb_can_deinit(self);
}
self->rxcallback0 = mp_const_none;
self->rxcallback1 = mp_const_none;
self->rx_state0 = RX_STATE_FIFO_EMPTY;
self->rx_state1 = RX_STATE_FIFO_EMPTY;
if (n_args > 1 || n_kw > 0) {
// start the peripheral
mp_map_t kw_args;
mp_map_init_fixed_table(&kw_args, n_kw, args + n_args);
pyb_can_init_helper(self, n_args - 1, args + 1, &kw_args);
}
}
return self;
}
STATIC mp_obj_t pyb_can_init(mp_uint_t n_args, const mp_obj_t *args, mp_map_t *kw_args) {

1
tests/pyb/can.py
View file

@ -8,6 +8,7 @@ for bus in (-1, 0, 1, 2, 3, "YA", "YB", "YC"):
print("CAN", bus)
except ValueError:
print("ValueError", bus)
CAN(1).deinit()
CAN.initfilterbanks(14)
can = CAN(1)