/********************************************************************

********************************************************************/
#include "gd32f30x.h"
#include "bsp_battery.h"
//#include "bsp_boost.h"
//#define EN_HEAT_A_PORT	GPIOE
//#define EN_HEAT_A_PIN	  GPIO_PIN_5
//#define EN_HEAT_B_PORT	GPIOE
//#define EN_HEAT_B_PIN	  GPIO_PIN_6

//voltage factor:R1 = 110K,R2 = 10K
#define V_FACTOR	((110 + 10) / 10.0f / 1000.0f)
#define VREF		3298

extern void delay_us(uint32_t us);
static void BspBattery_gpio_config(void)
{
	rcu_periph_clock_enable(RCU_GPIOE);
	rcu_periph_clock_enable(RCU_GPIOC);
  /* config the GPIO as analog mode	 */
	gpio_init(GPIOC, GPIO_MODE_AIN, GPIO_OSPEED_MAX, GPIO_PIN_4);
}

static void BspBattery_adc_config(void)
{
	/* enable ADC clock */
	rcu_periph_clock_enable(RCU_ADC1);
	/* config ADC clock */
	rcu_adc_clock_config(RCU_CKADC_CKAPB2_DIV6);

	/* ADC mode config */
	adc_mode_config(ADC_MODE_FREE);
	/* ADC data alignment config */
	adc_data_alignment_config(ADC1, ADC_DATAALIGN_RIGHT);
	/* ADC channel length config */
	adc_channel_length_config(ADC1, ADC_REGULAR_CHANNEL, 1U);
	
	/* ADC trigger config */
	adc_external_trigger_source_config(ADC1, ADC_REGULAR_CHANNEL, ADC0_1_2_EXTTRIG_REGULAR_NONE);
	/* ADC external trigger config */
	adc_external_trigger_config(ADC1, ADC_REGULAR_CHANNEL, ENABLE);

	/* enable ADC interface */
	adc_enable(ADC1);
  delay_us(1000);
	/* ADC calibration and reset calibration */
	adc_calibration_enable(ADC1);
}

void BspBattery_Init(void)
{
	BspBattery_gpio_config();
	BspBattery_adc_config();
}

//return battery voltage
float BspBattery_GetVbat(void)
{
	return BspBoost_GetVbat()/1000;
}

//return NTC AD
float BspBattery_GetNtc(void)
{
	volatile int timeout;
	
	adc_regular_channel_config(ADC1, 0U, ADC_CHANNEL_14, ADC_SAMPLETIME_13POINT5);
	adc_software_trigger_enable(ADC1, ADC_REGULAR_CHANNEL);
	/* wait the end of conversion flag */
	
	timeout = 1000;
	while(!adc_flag_get(ADC1, ADC_FLAG_EOC) && timeout > 0)
	{
		timeout--;
	}

/* clear the end of conversion flag */
	adc_flag_clear(ADC1, ADC_FLAG_EOC);
	/* return regular channel sample value */
	return (adc_regular_data_read(ADC1));
}