#ifndef _MRBC_ADC_H
#define _MRBC_ADC_H

#include "mrbc_api.h"
#include "mrubyc.h"

typedef struct ADC_HANDLE {
  uint8_t ch_num;
} ADC_HANDLE;

void c_adc_new(mrb_vm *vm, mrb_value *v, int argc){
  v[0] = mrbc_instance_new(vm, v[0].cls, sizeof(ADC_HANDLE));
  ADC_HANDLE *handle = (ADC_HANDLE *)v[0].instance->data;
  if(argc>0){
    uint8_t dpin = GET_INT_ARG(1);
    handle->ch_num = mrbcAnalogInit(dpin);
  }
}

void c_adc_read_raw(mrb_vm *vm, mrb_value *v, int argc){
  ADC_HANDLE *handle = (ADC_HANDLE *)v[0].instance->data;
  SET_INT_RETURN( mrbcAnalogRead( handle->ch_num ) );
}

#if MRBC_USE_FLOAT
void c_adc_read_voltage(mrb_vm *vm, mrb_value *v, int argc){
  ADC_HANDLE *handle = (ADC_HANDLE *)v[0].instance->data;
  float adc_p = MRBC_ADC_REF * mrbcAnalogRead( handle->ch_num ) / MRBC_ADC_RANGE;
  SET_FLOAT_RETURN(adc_p);
}
#endif

void mrbc_init_class_adc(void){
  mrb_class *adc = mrbc_define_class(0, "ADC",  mrbc_class_object);
  mrbc_define_method(0, adc, "new", c_adc_new);
  mrbc_define_method(0, adc, "read_raw", c_adc_read_raw);
#if MRBC_USE_FLOAT
  mrbc_define_method(0, adc, "read_voltage", c_adc_read_voltage);
  mrbc_define_method(0, adc, "read", c_adc_read_voltage);
#else
  mrbc_define_method(0, adc, "read", c_adc_read_raw);
#endif
}

#endif