/// \classmethod \constructor(channel)
/// Create an ADC object associated with the given channel.
/// This allows you to then read analog values on that pin.
STATIC mp_obj_t adc_make_new(mp_obj_t type_in, mp_uint_t n_args, mp_uint_t n_kw, const mp_obj_t *args) {
// check number of arguments
mp_arg_check_num(n_args, n_kw, 1, 1, false);
// the first argument is the channel number
int32_t idx = mp_obj_get_int(args[0]) - 1;
const pin_obj_t *pin;
uint channel;
switch (idx) {
case 0:
channel = ADC_CH_0;
pin = &pin_GP2;
break;
case 1:
channel = ADC_CH_1;
pin = &pin_GP3;
break;
case 2:
channel = ADC_CH_2;
pin = &pin_GP4;
break;
case 3:
channel = ADC_CH_3;
pin = &pin_GP5;
break;
default:
nlr_raise(mp_obj_new_exception_msg(&mp_type_ValueError, mpexception_value_invalid_arguments));
break;
}
// disable the callback before re-configuring
pyb_adc_obj_t *self = &pyb_adc_obj[idx];
self->base.type = &pyb_adc_type;
self->channel = channel;
self->idx = idx;
// configure the pin in analog mode
pin_config ((pin_obj_t *)pin, PIN_MODE_0, GPIO_DIR_MODE_IN, PYBPIN_ANALOG_TYPE, PIN_STRENGTH_2MA);
// initialize it
pybadc_init (self);
// register it with the sleep module
pybsleep_add ((const mp_obj_t)self, (WakeUpCB_t)pybadc_init);
return self;
}
/// \classmethod \constructor(pin)
/// Create an ADC object associated with the given pin.
/// This allows you to then read analog values on that pin.
STATIC mp_obj_t adc_make_new(mp_obj_t type_in, mp_uint_t n_args, mp_uint_t n_kw, const mp_obj_t *args) {
// check number of arguments
mp_arg_check_num(n_args, n_kw, 1, 1, false);
// the argument passed is the pin
const pin_obj_t *pin = (pin_obj_t *)pin_find(args[0]);
for (int32_t idx = 0; idx < PYB_ADC_NUM_CHANNELS; idx++) {
if (pin == pyb_adc_obj[idx].pin) {
pyb_adc_obj_t *self = &pyb_adc_obj[idx];
self->base.type = &pyb_adc_type;
pybadc_init (self);
// register it with the sleep module
pybsleep_add ((const mp_obj_t)self, (WakeUpCB_t)pybadc_init);
return self;
}
}
nlr_raise(mp_obj_new_exception_msg(&mp_type_ValueError, mpexception_value_invalid_arguments));
}
/// \method enable()
/// Enable the adc channel
STATIC mp_obj_t adc_enable(mp_obj_t self_in) {
pyb_adc_obj_t *self = self_in;
pybadc_init(self);
return mp_const_none;
}
