#include "gd32f30x.h"
#include "systick.h"

#define TempADC      ADC1
#define RCU_TempADC  RCU_ADC1

float temperature;
float vref_value;
/*!
    \brief      configure the different system clocks
    \param[in]  none
    \param[out] none
    \retval     none
*/
void temp_adc_rcu_config(void)
{
    /* enable ADC clock */
    rcu_periph_clock_enable(RCU_TempADC);
    /* config ADC clock */
    rcu_adc_clock_config(RCU_CKADC_CKAPB2_DIV4);
}
/*!
    \brief      configure the ADC peripheral
    \param[in]  none
    \param[out] none
    \retval     none
*/
void temp_adc_config(void)
{
    /* ADC SCAN function enable */
    adc_special_function_config(TempADC, ADC_SCAN_MODE, ENABLE);
    adc_special_function_config(TempADC, ADC_CONTINUOUS_MODE, DISABLE); 
    /* ADC trigger config */
    adc_external_trigger_source_config(TempADC, ADC_INSERTED_CHANNEL, ADC0_1_2_EXTTRIG_INSERTED_NONE);
    /* ADC mode config */
    adc_mode_config(ADC_MODE_FREE);
    /* ADC data alignment config */
    adc_data_alignment_config(TempADC, ADC_DATAALIGN_RIGHT);  
    /* ADC channel length config */
    adc_channel_length_config(TempADC, ADC_INSERTED_CHANNEL, 2);

  
    /* ADC temperature sensor channel config */
    adc_inserted_channel_config(TempADC, 0, ADC_CHANNEL_16, ADC_SAMPLETIME_239POINT5);
    /* ADC internal reference voltage channel config */
    adc_inserted_channel_config(TempADC, 1, ADC_CHANNEL_17, ADC_SAMPLETIME_239POINT5);

    adc_external_trigger_config(TempADC, ADC_INSERTED_CHANNEL, ENABLE);
  
    /* ADC temperature and Vrefint enable */
    adc_tempsensor_vrefint_enable();
 
    
    /* enable ADC interface */
    adc_enable(TempADC);
    delay_1ms(1);
    /* ADC calibration and reset calibration */
    adc_calibration_enable(TempADC);
}
void temperature_adc_config()
{
    /* system clocks configuration */
    temp_adc_rcu_config();
    /* ADC configuration */
    temp_adc_config();
}

void get_adc_temperature()
{
 /* ADC software trigger enable */
	adc_software_trigger_enable(TempADC, ADC_INSERTED_CHANNEL);
	/* delay a time in milliseconds */
//	delay_1ms(2000);

	/* value convert */
	temperature = (1.43 - ADC_IDATA0(TempADC)*3.3/4096) * 1000 / 4.3 + 25;
	vref_value = (ADC_IDATA1(TempADC) * 3.3 / 4096);

	/* value print */
//	printf(" the temperature data is %2.0f degrees Celsius\r\n", temperature);
//	printf(" the reference voltage data is %5.3fV \r\n", vref_value);
//	printf(" \r\n");
}