STATIC mp_obj_t pin_obj_init_helper(pin_obj_t *self, mp_uint_t n_args, const mp_obj_t *pos_args, mp_map_t *kw_args) {
// parse args
mp_arg_val_t args[pin_INIT_NUM_ARGS];
mp_arg_parse_all(n_args, pos_args, kw_args, pin_INIT_NUM_ARGS, pin_init_args, args);
// get the io mode
uint mode = args[0].u_int;
pin_validate_mode(mode);
// get the pull type
uint pull;
if (args[1].u_obj == mp_const_none) {
pull = PIN_TYPE_STD;
} else {
pull = mp_obj_get_int(args[1].u_obj);
pin_validate_pull (pull);
}
// get the value
int value = -1;
if (args[2].u_obj != MP_OBJ_NULL) {
if (mp_obj_is_true(args[2].u_obj)) {
value = 1;
} else {
value = 0;
}
}
// get the strenght
uint strength = args[3].u_int;
pin_validate_drive(strength);
// get the alternate function
int af = args[4].u_int;
if (mode != GPIO_DIR_MODE_ALT && mode != GPIO_DIR_MODE_ALT_OD) {
if (af == -1) {
af = 0;
} else {
goto invalid_args;
}
} else if (af < -1 || af > 15) {
goto invalid_args;
}
// check for a valid af and then free it from any other pins
if (af > PIN_MODE_0) {
uint8_t fn, unit, type;
pin_validate_af (self, af, &fn, &unit, &type);
pin_free_af_from_pins(fn, unit, type);
}
pin_config (self, af, mode, pull, value, strength);
return mp_const_none;
invalid_args:
nlr_raise(mp_obj_new_exception_msg(&mp_type_ValueError, mpexception_value_invalid_arguments));
}
STATIC mp_obj_t pin_drive(mp_uint_t n_args, const mp_obj_t *args) {
pin_obj_t *self = args[0];
if (n_args == 1) {
return mp_obj_new_int(self->strength);
} else {
uint32_t strength = mp_obj_get_int(args[1]);
pin_validate_drive (strength);
self->strength = strength;
pin_obj_configure(self);
return mp_const_none;
}
}