/**
  ******************************************************************************
  * @file    stm32f10x_adc.c
  * @author  MCD Application Team
  * @version V3.1.2
  * @date    09/28/2009
  * @brief   This file provides all the ADC firmware functions.
  ******************************************************************************
  * @copy
  *
  * THE PRESENT FIRMWARE WHICH IS FOR GUIDANCE ONLY AIMS AT PROVIDING CUSTOMERS
  * WITH CODING INFORMATION REGARDING THEIR PRODUCTS IN ORDER FOR THEM TO SAVE
  * TIME. AS A RESULT, STMICROELECTRONICS SHALL NOT BE HELD LIABLE FOR ANY
  * DIRECT, INDIRECT OR CONSEQUENTIAL DAMAGES WITH RESPECT TO ANY CLAIMS ARISING
  * FROM THE CONTENT OF SUCH FIRMWARE AND/OR THE USE MADE BY CUSTOMERS OF THE
  * CODING INFORMATION CONTAINED HEREIN IN CONNECTION WITH THEIR PRODUCTS.
  *
  * <h2><center>&copy; COPYRIGHT 2009 STMicroelectronics</center></h2>
  */ 

/* Includes ------------------------------------------------------------------*/
#include "stm32f10x_adc.h"
#include "stm32f10x_rcc.h"

/** @addtogroup STM32F10x_StdPeriph_Driver
  * @{
  */

/** @defgroup ADC 
  * @brief ADC driver modules
  * @{
  */

/** @defgroup ADC_Private_TypesDefinitions
  * @{
  */

/**
  * @}
  */

/** @defgroup ADC_Private_Defines
  * @{
  */

/* ADC DISCNUM mask */
#define CR1_DISCNUM_Reset           ((uint32_t)0xFFFF1FFF)

/* ADC DISCEN mask */
#define CR1_DISCEN_Set              ((uint32_t)0x00000800)
#define CR1_DISCEN_Reset            ((uint32_t)0xFFFFF7FF)

/* ADC JAUTO mask */
#define CR1_JAUTO_Set               ((uint32_t)0x00000400)
#define CR1_JAUTO_Reset             ((uint32_t)0xFFFFFBFF)

/* ADC JDISCEN mask */
#define CR1_JDISCEN_Set             ((uint32_t)0x00001000)
#define CR1_JDISCEN_Reset           ((uint32_t)0xFFFFEFFF)

/* ADC AWDCH mask */
#define CR1_AWDCH_Reset             ((uint32_t)0xFFFFFFE0)

/* ADC Analog watchdog enable mode mask */
#define CR1_AWDMode_Reset           ((uint32_t)0xFF3FFDFF)

/* CR1 register Mask */
#define CR1_CLEAR_Mask              ((uint32_t)0xFFF0FEFF)

/* ADC ADON mask */
#define CR2_ADON_Set                ((uint32_t)0x00000001)
#define CR2_ADON_Reset              ((uint32_t)0xFFFFFFFE)

/* ADC DMA mask */
#define CR2_DMA_Set                 ((uint32_t)0x00000100)
#define CR2_DMA_Reset               ((uint32_t)0xFFFFFEFF)

/* ADC RSTCAL mask */
#define CR2_RSTCAL_Set              ((uint32_t)0x00000008)

/* ADC CAL mask */
#define CR2_CAL_Set                 ((uint32_t)0x00000004)

/* ADC SWSTART mask */
#define CR2_SWSTART_Set             ((uint32_t)0x00400000)

/* ADC EXTTRIG mask */
#define CR2_EXTTRIG_Set             ((uint32_t)0x00100000)
#define CR2_EXTTRIG_Reset           ((uint32_t)0xFFEFFFFF)

/* ADC Software start mask */
#define CR2_EXTTRIG_SWSTART_Set     ((uint32_t)0x00500000)
#define CR2_EXTTRIG_SWSTART_Reset   ((uint32_t)0xFFAFFFFF)

/* ADC JEXTSEL mask */
#define CR2_JEXTSEL_Reset           ((uint32_t)0xFFFF8FFF)

/* ADC JEXTTRIG mask */
#define CR2_JEXTTRIG_Set            ((uint32_t)0x00008000)
#define CR2_JEXTTRIG_Reset          ((uint32_t)0xFFFF7FFF)

/* ADC JSWSTART mask */
#define CR2_JSWSTART_Set            ((uint32_t)0x00200000)

/* ADC injected software start mask */
#define CR2_JEXTTRIG_JSWSTART_Set   ((uint32_t)0x00208000)
#define CR2_JEXTTRIG_JSWSTART_Reset ((uint32_t)0xFFDF7FFF)

/* ADC TSPD mask */
#define CR2_TSVREFE_Set             ((uint32_t)0x00800000)
#define CR2_TSVREFE_Reset           ((uint32_t)0xFF7FFFFF)

/* CR2 register Mask */
#define CR2_CLEAR_Mask              ((uint32_t)0xFFF1F7FD)

/* ADC SQx mask */
#define SQR3_SQ_Set                 ((uint32_t)0x0000001F)
#define SQR2_SQ_Set                 ((uint32_t)0x0000001F)
#define SQR1_SQ_Set                 ((uint32_t)0x0000001F)

/* SQR1 register Mask */
#define SQR1_CLEAR_Mask             ((uint32_t)0xFF0FFFFF)

/* ADC JSQx mask */
#define JSQR_JSQ_Set                ((uint32_t)0x0000001F)

/* ADC JL mask */
#define JSQR_JL_Set                 ((uint32_t)0x00300000)
#define JSQR_JL_Reset               ((uint32_t)0xFFCFFFFF)

/* ADC SMPx mask */
#define SMPR1_SMP_Set               ((uint32_t)0x00000007)
#define SMPR2_SMP_Set               ((uint32_t)0x00000007)

/* ADC JDRx registers offset */
#define JDR_Offset                  ((uint8_t)0x28)

/* ADC1 DR register base address */
#define DR_ADDRESS                  ((uint32_t)0x4001244C)

/**
  * @}
  */

/** @defgroup ADC_Private_Macros
  * @{
  */

/**
  * @}
  */

/** @defgroup ADC_Private_Variables
  * @{
  */

/**
  * @}
  */

/** @defgroup ADC_Private_FunctionPrototypes
  * @{
  */

/**
  * @}
  */

/** @defgroup ADC_Private_Functions
  * @{
  */

/**
  * @brief  Deinitializes the ADCx peripheral registers to their default reset values.
  * @param  ADCx: where x can be 1, 2 or 3 to select the ADC peripheral.
  * @retval None
  */
void ADC_DeInit(ADC_TypeDef* ADCx)
{
  /* Check the parameters */
  assert_param(IS_ADC_ALL_PERIPH(ADCx));
  
  if (ADCx == ADC1)
  {
    /* Enable ADC1 reset state */
    RCC_APB2PeriphResetCmd(RCC_APB2Periph_ADC1, ENABLE);
    /* Release ADC1 from reset state */
    RCC_APB2PeriphResetCmd(RCC_APB2Periph_ADC1, DISABLE);
  }
  else if (ADCx == ADC2)
  {
    /* Enable ADC2 reset state */
    RCC_APB2PeriphResetCmd(RCC_APB2Periph_ADC2, ENABLE);
    /* Release ADC2 from reset state */
    RCC_APB2PeriphResetCmd(RCC_APB2Periph_ADC2, DISABLE);
  }
  else
  {
    if (ADCx == ADC3)
    {
      /* Enable ADC3 reset state */
      RCC_APB2PeriphResetCmd(RCC_APB2Periph_ADC3, ENABLE);
      /* Release ADC3 from reset state */
      RCC_APB2PeriphResetCmd(RCC_APB2Periph_ADC3, DISABLE);
    }
  }
}

/**
  * @brief  Initializes the ADCx peripheral according to the specified parameters
  *   in the ADC_InitStruct.
  * @param  ADCx: where x can be 1, 2 or 3 to select the ADC peripheral.
  * @param  ADC_InitStruct: pointer to an ADC_InitTypeDef structure that contains
  *   the configuration information for the specified ADC peripheral.
  * @retval None
  */
void ADC_Init(ADC_TypeDef* ADCx, ADC_InitTypeDef* ADC_InitStruct)
{
  uint32_t tmpreg1 = 0;
  uint8_t tmpreg2 = 0;
  /* Check the parameters */
  assert_param(IS_ADC_ALL_PERIPH(ADCx));
  assert_param(IS_ADC_MODE(ADC_InitStruct->ADC_Mode));
  assert_param(IS_FUNCTIONAL_STATE(ADC_InitStruct->ADC_ScanConvMode));
  assert_param(IS_FUNCTIONAL_STATE(ADC_InitStruct->ADC_ContinuousConvMode));
  assert_param(IS_ADC_EXT_TRIG(ADC_InitStruct->ADC_ExternalTrigConv));   
  assert_param(IS_ADC_DATA_ALIGN(ADC_InitStruct->ADC_DataAlign)); 
  assert_param(IS_ADC_REGULAR_LENGTH(ADC_InitStruct->ADC_NbrOfChannel));

  /*---------------------------- ADCx CR1 Configuration -----------------*/
  /* Get the ADCx CR1 value */
  tmpreg1 = ADCx->CR1;
  /* Clear DUALMOD and SCAN bits */
  tmpreg1 &= CR1_CLEAR_Mask;
  /* Configure ADCx: Dual mode and scan conversion mode */
  /* Set DUALMOD bits according to ADC_Mode value */
  /* Set SCAN bit according to ADC_ScanConvMode value */
  tmpreg1 |= (uint32_t)(ADC_InitStruct->ADC_Mode | ((uint32_t)ADC_InitStruct->ADC_ScanConvMode << 8));
  /* Write to ADCx CR1 */
  ADCx->CR1 = tmpreg1;

  /*---------------------------- ADCx CR2 Configuration -----------------*/
  /* Get the ADCx CR2 value */
  tmpreg1 = ADCx->CR2;
  /* Clear CONT, ALIGN and EXTSEL bits */
  tmpreg1 &= CR2_CLEAR_Mask;
  /* Configure ADCx: external trigger event and continuous conversion mode */
  /* Set ALIGN bit according to ADC_DataAlign value */
  /* Set EXTSEL bits according to ADC_ExternalTrigConv value */
  /* Set CONT bit according to ADC_ContinuousConvMode value */
  tmpreg1 |= (uint32_t)(ADC_InitStruct->ADC_DataAlign | ADC_InitStruct->ADC_ExternalTrigConv |
            ((uint32_t)ADC_InitStruct->ADC_ContinuousConvMode << 1));
  /* Write to ADCx CR2 */
  ADCx->CR2 = tmpreg1;

  /*---------------------------- ADCx SQR1 Configuration -----------------*/
  /* Get the ADCx SQR1 value */
  tmpreg1 = ADCx->SQR1;
  /* Clear L bits */
  tmpreg1 &= SQR1_CLEAR_Mask;
  /* Configure ADCx: regular channel sequence length */
  /* Set L bits according to ADC_NbrOfChannel value */
  tmpreg2 |= (uint8_t) (ADC_InitStruct->ADC_NbrOfChannel - (uint8_t)1);
  tmpreg1 |= (uint32_t)tmpreg2 << 20;
  /* Write to ADCx SQR1 */
  ADCx->SQR1 = tmpreg1;
}

/**
  * @brief  Fills each ADC_InitStruct member with its default value.
  * @param  ADC_InitStruct : pointer to an ADC_InitTypeDef structure which will be initialized.
  * @retval None
  */
void ADC_StructInit(ADC_InitTypeDef* ADC_InitStruct)
{
  /* Reset ADC init structure parameters values */
  /* Initialize the ADC_Mode member */
  ADC_InitStruct->ADC_Mode = ADC_Mode_Independent;
  /* initialize the ADC_ScanConvMode member */
  ADC_InitStruct->ADC_ScanConvMode = DISABLE;
  /* Initialize the ADC_ContinuousConvMode member */
  ADC_InitStruct->ADC_ContinuousConvMode = DISABLE;
  /* Initialize the ADC_ExternalTrigConv member */
  ADC_InitStruct->ADC_ExternalTrigConv = ADC_ExternalTrigConv_T1_CC1;
  /* Initialize the ADC_DataAlign member */
  ADC_InitStruct->ADC_DataAlign = ADC_DataAlign_Right;
  /* Initialize the ADC_NbrOfChannel member */
  ADC_InitStruct->ADC_NbrOfChannel = 1;
}

/**
  * @brief  Enables or disables the specified ADC peripheral.
  * @param  ADCx: where x can be 1, 2 or 3 to select the ADC peripheral.
  * @param  NewState: new state of the ADCx peripheral.
  *   This parameter can be: ENABLE or DISABLE.
  * @retval None
  */
void ADC_Cmd(ADC_TypeDef* ADCx, FunctionalState NewState)
{
  /* Check the parameters */
  assert_param(IS_ADC_ALL_PERIPH(ADCx));
  assert_param(IS_FUNCTIONAL_STATE(NewState));
  if (NewState != DISABLE)
  {
    /* Set the ADON bit to wake up the ADC from power down mode */
    ADCx->CR2 |= CR2_ADON_Set;
  }
  else
  {
    /* Disable the selected ADC peripheral */
    ADCx->CR2 &= CR2_ADON_Reset;
  }
}

/**
  * @brief  Enables or disables the specified ADC DMA request.
  * @param  ADCx: where x can be 1 or 3 to select the ADC peripheral.
  *   Note: ADC2 hasn't a DMA capability.
  * @param  NewState: new state of the selected ADC DMA transfer.
  *   This parameter can be: ENABLE or DISABLE.
  * @retval None
  */
void ADC_DMACmd(ADC_TypeDef* ADCx, FunctionalState NewState)
{
  /* Check the parameters */
  assert_param(IS_ADC_DMA_PERIPH(ADCx));
  assert_param(IS_FUNCTIONAL_STATE(NewState));