/******************************************************************************
 * Copyright (C) 2014-2015 HangZhou SiZhu Co.,LTD.
 *
 *-----------------------------------------------------------------------------
 * File: 			    DMA.c
 * Description:		initialize DMA config code
 * Author:			  Lishoujian (867693272@qq.com)
 * Date:			    Jan 8, 2015
 *****************************************************************************/

/* ----------------------- Platform includes --------------------------------*/
#include "dma.h"
#include "stm32f10x_rcc.h"


uint16 SendBuff[1000];
 
/******************************************
 * func:    DMA_Configuration
 * desc:    Initialize DMA
 * input:   none
 * output:  none
 * return:  none
 *****************************************/
 		 
void DMA_Configuration(void)
{
	DMA_InitTypeDef DMA_InitStructure;
	ADC_InitTypeDef  ADC_InitStructure; 
	GPIO_InitTypeDef GPIO_InitStructure;	 
	
 	RCC_AHBPeriphClockCmd(RCC_AHBPeriph_DMA1, ENABLE);	//Enable DMA
	
	DMA_InitStructure.DMA_PeripheralBaseAddr = (u32)&ADC1->DR;  //DMA peripheral base address
	DMA_InitStructure.DMA_MemoryBaseAddr = (u32)SendBuff;  //DMA memory base address
	DMA_InitStructure.DMA_DIR = DMA_DIR_PeripheralSRC;  
	DMA_InitStructure.DMA_BufferSize = DMA_bufsize;  //DMA  send buffer size
	DMA_InitStructure.DMA_PeripheralInc = DMA_PeripheralInc_Disable;  
	DMA_InitStructure.DMA_MemoryInc = DMA_MemoryInc_Enable;  
	DMA_InitStructure.DMA_PeripheralDataSize = DMA_PeripheralDataSize_HalfWord;  
	DMA_InitStructure.DMA_MemoryDataSize = DMA_MemoryDataSize_HalfWord;
	DMA_InitStructure.DMA_Mode = DMA_Mode_Circular;  
	DMA_InitStructure.DMA_Priority = DMA_Priority_VeryHigh;  
	DMA_InitStructure.DMA_M2M = DMA_M2M_Disable;  
	DMA_Init(DMA1_Channel1, &DMA_InitStructure);  

	RCC_APB2PeriphClockCmd(RCC_APB2Periph_GPIOB | RCC_APB2Periph_GPIOE |RCC_APB2Periph_ADC1, ENABLE);//enbale adc channel clock 

	RCC_ADCCLKConfig(RCC_PCLK2_Div4);//72M /6 = 12M ;adc max sample frequence <= 14MHZ
    
	GPIO_InitStructure.GPIO_Pin  = GPIO_Pin_1;//
	GPIO_InitStructure.GPIO_Mode = GPIO_Mode_AIN;
	GPIO_Init(GPIOB, &GPIO_InitStructure);	

  GPIO_InitStructure.GPIO_Pin =GPIO_Pin_9;   //power
  GPIO_InitStructure.GPIO_Mode = GPIO_Mode_Out_PP; 		 //ÍÆÍìÊä³ö
  GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz;		 //IO¿ÚËÙ¶ÈΪ50MHz
  GPIO_Init(GPIOE, &GPIO_InitStructure);		
  GPIO_SetBits(GPIOE,GPIO_Pin_9);
 
 
	ADC_DeInit(ADC1);//reset adc1

	ADC_InitStructure.ADC_Mode                =  ADC_Mode_Independent;	//ADC1 work mode:independent
	ADC_InitStructure.ADC_ScanConvMode        =  DISABLE;	//single channel mode
	ADC_InitStructure.ADC_ContinuousConvMode  =  ENABLE;	//
	ADC_InitStructure.ADC_ExternalTrigConv    =  ADC_ExternalTrigConv_None;	//triggered by software
	ADC_InitStructure.ADC_DataAlign           =  ADC_DataAlign_Right;	//ADC data align right
	ADC_InitStructure.ADC_NbrOfChannel        =  1;
	ADC_Init(ADC1, &ADC_InitStructure);//init adc1 register
  
	ADC_DMACmd(ADC1, ENABLE);
	
	ADC_Cmd(ADC1, ENABLE);//enbale adc1
	
	ADC_ResetCalibration(ADC1);//reset & calibrate adc1
	 
	while(ADC_GetResetCalibrationStatus(ADC1));//waiting for ending
	
	ADC_StartCalibration(ADC1);//open calibrating adc1
 
	while(ADC_GetCalibrationStatus(ADC1));//waiting for ending
	
	ADC_RegularChannelConfig(ADC1, 9, 1, ADC_SampleTime_1Cycles5 );		
}