N3_stm32/N3Drive/USER/adc.c

#include "adc.h"

u16 uAD_Buff_A[ADC_CHANNEL];        //ADC采集缓存A
u16 uAD_Buff_B[ADC_CHANNEL];        //ADC采集缓存B

void ADC_GPIO_Config(u32 RCC_APBnPeriphn, GPIO_TypeDef *GPIOx,u16 PIN)
{
	RCC_AHB1PeriphClockCmd(RCC_APBnPeriphn, ENABLE);
	
	GPIO_InitTypeDef  GPIO_InitStructure;
  GPIO_InitStructure.GPIO_Pin  = PIN;
  GPIO_InitStructure.GPIO_Mode = GPIO_Mode_AN;//模拟输入
  GPIO_InitStructure.GPIO_PuPd = GPIO_PuPd_NOPULL ;//不带上下拉
  GPIO_Init(GPIOx, &GPIO_InitStructure);//初始化
}

void ADC_Mode_Config(u32 RCC_APBnPeriphn, u32 ADC_ExternalTrigConv, ADC_TypeDef* ADCn, u8 ADC_Channel[], u8 Channel_num)
{
  RCC_APB2PeriphClockCmd(RCC_APBnPeriphn, ENABLE); //使能ADC3时钟
	RCC_APB2PeriphResetCmd(RCC_APBnPeriphn, ENABLE);	  //ADC3复位		
	RCC_APB2PeriphResetCmd(RCC_APBnPeriphn, DISABLE);	//复位结束	 
	
	ADC_CommonInitTypeDef ADC_CommonInitStructure;
  ADC_CommonInitStructure.ADC_Mode             = ADC_Mode_Independent;//独立模式
  ADC_CommonInitStructure.ADC_TwoSamplingDelay = ADC_TwoSamplingDelay_5Cycles;//两个采样阶段之间的延迟5个时钟
  ADC_CommonInitStructure.ADC_DMAAccessMode    = ADC_DMAAccessMode_Disabled; //DMA失能
  ADC_CommonInitStructure.ADC_Prescaler        = ADC_Prescaler_Div4;//预分频4分频。ADCCLK=PCLK2/4=84/4=21Mhz,ADC时钟最好不要超过36Mhz 
  ADC_CommonInit(&ADC_CommonInitStructure);//初始化
	
	ADC_InitTypeDef  ADC_InitStructure;
  ADC_InitStructure.ADC_Resolution   				 = ADC_Resolution_12b;//12位模式
  ADC_InitStructure.ADC_ScanConvMode         = ENABLE;//扫描模式	 ENABLE
  ADC_InitStructure.ADC_ContinuousConvMode   = DISABLE;//关闭连续转换
  //ADC_InitStructure.ADC_ExternalTrigConvEdge = ADC_ExternalTrigConvEdge_None;//禁止触发检测
	ADC_InitStructure.ADC_ExternalTrigConvEdge = ADC_ExternalTrigConvEdge_Rising; //上升沿触发
	ADC_InitStructure.ADC_ExternalTrigConv     = ADC_ExternalTrigConv;  //定时器5事件触发ADC
  ADC_InitStructure.ADC_DataAlign            = ADC_DataAlign_Right;//右对齐	
  ADC_InitStructure.ADC_NbrOfConversion      = Channel_num;//1个转换在规则序列中 也就是只转换规则序列1 
  ADC_Init(ADCn, &ADC_InitStructure);//ADC初始化
	
	for(int i=0; i<Channel_num; i++)
	{
		ADC_RegularChannelConfig(ADC3, ADC_Channel[i] , i+1 , ADC_SampleTime_144Cycles);
	}
	
	ADC_DMARequestAfterLastTransferCmd(ADC3, ENABLE); //连续使能DMA
	
  ADC_DMACmd(ADCn, ENABLE);													//使能ADC_DMA
	
  ADC_Cmd(ADCn, ENABLE);														//开启AD转换器
}

void ADC_DMA_Config(u32 RCC_AHB_DMA,u32 DMA_Channel,ADC_TypeDef* ADCn,DMA_Stream_TypeDef *DMA_Stream)
{
  //时钟
  RCC_AHB1PeriphClockCmd(RCC_AHB_DMA, ENABLE);
  
  //DMA设置
	DMA_InitTypeDef  DMA_InitStructure;
  DMA_InitStructure.DMA_Channel            = DMA_Channel; 									  //选择通道号
  DMA_InitStructure.DMA_PeripheralBaseAddr = (uint32_t)&(ADCn->DR);					  //外围设备地址,ADC_DR_DATA规则数据寄存器
  DMA_InitStructure.DMA_Memory0BaseAddr    = (uint32_t)(u16 *)uAD_Buff_A; 		//DMA存储器地址,自己设置的缓存地址
  DMA_InitStructure.DMA_DIR                = DMA_DIR_PeripheralToMemory; 			//传输方向,外设->存储器
  DMA_InitStructure.DMA_BufferSize         = ADC_CHANNEL; 			              //DMA缓存大小,数据传输量32*6 ADC_BUFFSIZE * ADC_CHANNEL
  DMA_InitStructure.DMA_PeripheralInc      = DMA_PeripheralInc_Disable; 			//外设是否为增量模式
  DMA_InitStructure.DMA_MemoryInc          = DMA_MemoryInc_Enable; 						//存储器是否为增量模式
  DMA_InitStructure.DMA_PeripheralDataSize = DMA_PeripheralDataSize_HalfWord; //外设数据长度半个字(16位)
  DMA_InitStructure.DMA_MemoryDataSize     = DMA_MemoryDataSize_HalfWord; 		//存储器数据长度半字(16位)
  DMA_InitStructure.DMA_Mode               = DMA_Mode_Circular; 							//DMA模式,普通模式、循环模式,还有双缓冲模式,需要特殊设置
  DMA_InitStructure.DMA_Priority           = DMA_Priority_Low; 							  //DMA优先级,高优先级
  DMA_InitStructure.DMA_FIFOMode           = DMA_FIFOMode_Disable; 						//不使用FIFO
  DMA_InitStructure.DMA_FIFOThreshold      = DMA_FIFOThreshold_HalfFull; 			//FIFO阈值
  DMA_InitStructure.DMA_MemoryBurst        = DMA_MemoryBurst_Single; 					//存储器突发,单次传输
  DMA_InitStructure.DMA_PeripheralBurst    = DMA_PeripheralBurst_Single; 			//外设突发,单次传输
  DMA_Init(DMA_Stream, &DMA_InitStructure); //初始化DMA2_Stream0,对应为ADC3
	
  //双缓冲模式设置
  DMA_DoubleBufferModeConfig(DMA_Stream,(uint32_t)(u16 *)(uAD_Buff_B),DMA_Memory_0);    //DMA_Memory_0首先被传输
  DMA_DoubleBufferModeCmd(DMA_Stream,ENABLE);
  
  //设置DMA中断
  DMA_ClearITPendingBit(DMA_Stream, DMA_IT_TC); //清除中断标志   
  DMA_ITConfig(DMA_Stream, DMA_IT_TC, ENABLE); //传输完成中断                                       
  DMA_Cmd(DMA_Stream, ENABLE); //使能DMA
}

void ADC_TIM_Config(TIM_TypeDef* TIMx,u16 psc, u16 per,
										void(*ClockCMD)(uint32_t, FunctionalState),u32 RCC_APBnPeriphn,		//APB时钟使能设置								
										void(*TIM_OCInit)(TIM_TypeDef*, TIM_OCInitTypeDef*), 							 //OC通道设置
										void(*TIM_OCPreloadConfig)(TIM_TypeDef*, uint16_t))
{
	(*ClockCMD)(RCC_APBnPeriphn,ENABLE);
	//时基初始化
	TIM_TimeBaseInitTypeDef  TIM_TimeBaseStructure;
	TIM_TimeBaseStructure.TIM_Prescaler     = psc;  							//定时器分频
	TIM_TimeBaseStructure.TIM_CounterMode   = TIM_CounterMode_Up; //向上计数模式
	TIM_TimeBaseStructure.TIM_Period        = per;   							//自动重装载值
	TIM_TimeBaseStructure.TIM_ClockDivision = TIM_CKD_DIV1; 
	TIM_TimeBaseStructure.TIM_RepetitionCounter = 0;
	TIM_TimeBaseInit(TIMx,&TIM_TimeBaseStructure);//初始化定时器
	//输出比较初始化
	TIM_OCInitTypeDef  TIM_OCInitStructure;
	TIM_OCInitStructure.TIM_Pulse       = 10;
	TIM_OCInitStructure.TIM_OCMode      = TIM_OCMode_PWM1; //选择定时器模式:TIM脉冲宽度调制模式2
 	TIM_OCInitStructure.TIM_OutputState = TIM_OutputState_Enable; //比较输出使能
	TIM_OCInitStructure.TIM_OCPolarity  = TIM_OCPolarity_Low; //输出极性:TIM输出比较极性低
	
	(*TIM_OCInit)(TIMx,&TIM_OCInitStructure);
	
	(*TIM_OCPreloadConfig)(TIMx,TIM_OCPreload_Enable);
	
	TIM_CtrlPWMOutputs(TIMx, ENABLE);
	
	//TIM_ARRPreloadConfig(TIMx, ENABLE);//允许重载
	
	TIM_SelectOutputTrigger(TIMx, TIM_TRGOSource_OC1);//触发源
	
	//TIM_ITConfig(TIMx,TIM_IT_Update,ENABLE);
	
	TIM_Cmd(TIMx, ENABLE);
	
	//TIM_UpdateDisableConfig(TIMx, DISABLE);
}

void ADC_NVIC_Config(u8 NVIC_IRQChannel, u8 pre, u8 sub)
{
	NVIC_InitTypeDef NVIC_InitStructure;
	
	NVIC_InitStructure.NVIC_IRQChannel                   = NVIC_IRQChannel; //DMA2_Stream0中断
  NVIC_InitStructure.NVIC_IRQChannelPreemptionPriority = pre;  						//抢占优先级1
  NVIC_InitStructure.NVIC_IRQChannelSubPriority        = sub;        			//子优先级1
  NVIC_InitStructure.NVIC_IRQChannelCmd = ENABLE;           							//IRQ通道使能
	
  NVIC_Init(&NVIC_InitStructure);    //根据指定的参数初始化NVIC寄存器  
}