#include "Alimentation.h"

#include "stm32f1xx_ll_adc.h"
#include "stm32f1xx_ll_bus.h"
#include "stm32f1xx_ll_rcc.h"
#include "stm32f1xx_ll_gpio.h"
#include <math.h>

void ALIMENTATION_Init(void){
  RCC -> CFGR |= (0x1<<15);
  RCC-> CFGR &= ~ (0x1<<14);
  LL_APB2_GRP1_EnableClock(LL_APB2_GRP1_PERIPH_ADC2);
  LL_APB1_GRP1_EnableClock(LL_APB2_GRP1_PERIPH_GPIOC);
  
  LL_GPIO_InitTypeDef pc2;
  LL_ADC_InitTypeDef adc;
  LL_ADC_REG_InitTypeDef adcReg;
  
  LL_GPIO_StructInit(&pc2);
  pc2.Pin = LL_GPIO_PIN_0;
  pc2.Mode = LL_GPIO_MODE_ANALOG;
  LL_GPIO_Init(GPIOC, &pc2);


  adc.DataAlignment = LL_ADC_DATA_ALIGN_RIGHT;
  adc.SequencersScanMode = LL_ADC_SEQ_SCAN_DISABLE;
  LL_ADC_Init(ADC2, &adc);

  adcReg.TriggerSource = LL_ADC_REG_TRIG_SOFTWARE ;
  adcReg.SequencerLength = LL_ADC_REG_SEQ_SCAN_DISABLE;
  adcReg.SequencerDiscont = LL_ADC_REG_SEQ_DISCONT_DISABLE;
  adcReg.ContinuousMode = LL_ADC_REG_CONV_SINGLE;
  adcReg.DMATransfer = LL_ADC_REG_DMA_TRANSFER_NONE;    

  LL_ADC_REG_Init(ADC2, &adcReg);
  LL_ADC_Enable(ADC2);
}

float ALIMENTATION_GetBatteryLevel(void){		
  float u2;
  float battery_level;
  LL_ADC_REG_SetSequencerRanks(ADC2, LL_ADC_REG_RANK_1, LL_ADC_CHANNEL_12);
  LL_ADC_REG_StartConversionSWStart(ADC2);	
  while (LL_ADC_IsActiveFlag_EOS(ADC2) != 1);
  battery_level = LL_ADC_REG_ReadConversionData12(ADC2);
  u2 = (battery_level*3.3)/4095.0;
  float level = u2*13.0;	
  return level;
}
  
int ALIMENTATION_IsLevelEnough(void){
  if (ALIMENTATION_GetBatteryLevel()<(0.8*12)){
    return 0;
  }else{
    return 1;
  }
}