/******************** (C) COPYRIGHT 2008 STMicroelectronics ********************
* File Name          : main.c
* Author             : MCD Application Team
* Version            : V2.0.1
* Date               : 06/13/2008
* Description        : Main program body
********************************************************************************
* 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.
*******************************************************************************/

/* Includes ------------------------------------------------------------------*/
#include "stm32f10x_lib.h"

/* Private typedef -----------------------------------------------------------*/
/* Private define ------------------------------------------------------------*/
#define ADC1_DR_Address    ((u32)0x4001244C)   //ADC_DR

/* Private macro -------------------------------------------------------------*/
/* Private variables ---------------------------------------------------------*/
ADC_InitTypeDef ADC_InitStructure;
DMA_InitTypeDef DMA_InitStructure;
vu16 ADCConvertedValue;
ErrorStatus HSEStartUpStatus;
/* Private function prototypes -----------------------------------------------*/
void RCC_Configuration(void);   //
void GPIO_Configuration(void);
void NVIC_Configuration(void);
/* Private functions ---------------------------------------------------------*/

/*******************************************************************************
* Function Name : main
* Description    : Main program
* Input          : None
* Output         : None
* Return         : None
*******************************************************************************/
int main(void)
{

/* System clocks configuration ---------------------------------------------*/
RCC_Configuration();    //系统时钟配置

/* NVIC configuration ------------------------------------------------------*/
NVIC_Configuration();    //中断向量配置

/* GPIO configuration ------------------------------------------------------*/
GPIO_Configuration();    //GPIO配置

/* DMA1 channel1 configuration ----------------------------------------------*/
DMA_DeInit(DMA1_Channel1);
DMA_InitStructure.DMA_PeripheralBaseAddr = ADC1_DR_Address; //ADC_DR    外设地址
DMA_InitStructure.DMA_MemoryBaseAddr = (u32)&ADCConvertedValue; //内存基地址
DMA_InitStructure.DMA_DIR = DMA_DIR_PeripheralSRC;    //外设作为数据传输的来源
DMA_InitStructure.DMA_BufferSize = 1;         //缓存大小为1
DMA_InitStructure.DMA_PeripheralInc = DMA_PeripheralInc_Disable;//内存
DMA_InitStructure.DMA_MemoryInc = DMA_MemoryInc_Disable;    //外设寄存器不变
DMA_InitStructure.DMA_PeripheralDataSize = DMA_PeripheralDataSize_HalfWord; //外设数据宽度为16位
DMA_InitStructure.DMA_MemoryDataSize = DMA_MemoryDataSize_HalfWord; //内存数据宽度为16位
DMA_InitStructure.DMA_Mode = DMA_Mode_Circular;       //工作循环缓存模式
DMA_InitStructure.DMA_Priority = DMA_Priority_High;     //高优先级
DMA_InitStructure.DMA_M2M = DMA_M2M_Disable;       //没有内存到内存传输
DMA_Init(DMA1_Channel1, &DMA_InitStructure);       //初始化DMA通道1
/* Enable DMA1 channel1 */
DMA_Cmd(DMA1_Channel1, ENABLE);          //使能DMA通道1
/* ADC1 configuration ------------------------------------------------------*/
ADC_InitStructure.ADC_Mode = ADC_Mode_Independent;   //独立模式
ADC_InitStructure.ADC_ScanConvMode = ENABLE;    // 多通道模式
ADC_InitStructure.ADC_ContinuousConvMode = ENABLE; //连续模式
ADC_InitStructure.ADC_ExternalTrigConv = ADC_ExternalTrigConv_None; //由软件启动转换AD
ADC_InitStructure.ADC_DataAlign = ADC_DataAlign_Right;       //AD数据右对齐
ADC_InitStructure.ADC_NbrOfChannel = 1;            //adc通道数
ADC_Init(ADC1, &ADC_InitStructure);          //初始化ADC

/* ADC1 regular channel14 configuration */
ADC_RegularChannelConfig(ADC1, ADC_Channel_14, 1, ADC_SampleTime_55Cycles5); //ADC1 通道 14    采样时间

/* Enable ADC1 DMA */
ADC_DMACmd(ADC1, ENABLE);              //使能ADC1的DMA请求
/* Enable ADC1 */                 //使能ADC1外设
ADC_Cmd(ADC1, ENABLE);

/* Enable ADC1 reset calibaration register */  
ADC_ResetCalibration(ADC1);           //    重置ADC1校准
/* Check the end of ADC1 reset calibration register */
while(ADC_GetResetCalibrationStatus(ADC1));         //获取校准新状态

/* Start ADC1 calibaration */
ADC_StartCalibration(ADC1);         //启动ADC1
/* Check the end of ADC1 calibration */
while(ADC_GetCalibrationStatus(ADC1));      //获取指定ADC1校准程序
/* Start ADC1 Software Conversion */
ADC_SoftwareStartConvCmd(ADC1, ENABLE);    //使能ADC1软件启动功能

while (1)
{
}
}

/*******************************************************************************
* Function Name : RCC_Configuration
* Description    : Configures the different system clocks.
* Input          : None
* Output         : None
* Return         : None
*******************************************************************************/
void RCC_Configuration(void)
{
/* RCC system reset(for debug purpose) */
RCC_DeInit();

/* Enable HSE */
RCC_HSEConfig(RCC_HSE_ON);

/* Wait till HSE is ready */
HSEStartUpStatus = RCC_WaitForHSEStartUp();

if(HSEStartUpStatus == SUCCESS)
{
    /* Enable Prefetch Buffer */
    FLASH_PrefetchBufferCmd(FLASH_PrefetchBuffer_Enable);

    /* Flash 2 wait state */
    FLASH_SetLatency(FLASH_Latency_2);
    /* HCLK = SYSCLK */
    RCC_HCLKConfig(RCC_SYSCLK_Div1);
    /* PCLK2 = HCLK */
    RCC_PCLK2Config(RCC_HCLK_Div1);

    /* PCLK1 = HCLK/2 */
    RCC_PCLK1Config(RCC_HCLK_Div2);

    /* ADCCLK = PCLK2/4 */
    RCC_ADCCLKConfig(RCC_PCLK2_Div4);
    /* PLLCLK = 8MHz * 7 = 56 MHz */
    RCC_PLLConfig(RCC_PLLSource_HSE_Div1, RCC_PLLMul_7);   //56MHZ

    /* Enable PLL */
    RCC_PLLCmd(ENABLE);

    /* Wait till PLL is ready */
    while(RCC_GetFlagStatus(RCC_FLAG_PLLRDY) == RESET)
    {
    }

    /* Select PLL as system clock source */
    RCC_SYSCLKConfig(RCC_SYSCLKSource_PLLCLK);

    /* Wait till PLL is used as system clock source */
    while(RCC_GetSYSCLKSource() != 0x08)
    {
    }
}

/* Enable peripheral clocks --------------------------------------------------*/
/* Enable DMA1 clock */
RCC_AHBPeriphClockCmd(RCC_AHBPeriph_DMA1, ENABLE);   //使能DMA时钟

/* Enable ADC1 and GPIOC clock */
RCC_APB2PeriphClockCmd(RCC_APB2Periph_ADC1 | RCC_APB2Periph_GPIOC, ENABLE); //使能ADC1   GPIOC通道
}

/*******************************************************************************
* Function Name : GPIO_Configuration
* Description    : Configures the different GPIO ports.
* Input          : None
* Output         : None
* Return         : None
*******************************************************************************/
void GPIO_Configuration(void)
{
GPIO_InitTypeDef GPIO_InitStructure;

/* Configure PC.04 (ADC Channel14) as analog input -------------------------*/
GPIO_InitStructure.GPIO_Pin = GPIO_Pin_4;
GPIO_InitStructure.GPIO_Mode = GPIO_Mode_AIN;
GPIO_Init(GPIOC, &GPIO_InitStructure);
}

/*******************************************************************************
* Function Name : NVIC_Configuration
* Description    : Configures Vector Table base location.
* Input          : None
* Output         : None
* Return         : None
*******************************************************************************/
void NVIC_Configuration(void)
{
#ifdef VECT_TAB_RAM
/* Set the Vector Table base location at 0x20000000 */
NVIC_SetVectorTable(NVIC_VectTab_RAM, 0x0);
#else /* VECT_TAB_FLASH */
/* Set the Vector Table base location at 0x08000000 */
NVIC_SetVectorTable(NVIC_VectTab_FLASH, 0x0);  
#endif
}