电赛总结（二）——AD芯片总结之音频处理芯片ADC8009

一、特性参数

1、专门用来用音频处理的AD芯片

2、内部固定好8K的采样速率

3、8位AD芯片

二、内部结构图

三、芯片管脚图

四、管脚功能说明

管脚名称	功能
IN0~IN7	数据输入端
ABC	数据输入端口选择
ST	ST 为转换启动信号。当ST 上跳沿时，所有内部寄存器清零；下跳沿时，开始进行A/D 转换；在转换期间，ST 应保持低电平。
EOC	EOC 为转换结束信号。当EOC 为高电平时，表明转换结束；否则，表明正在进行A/D 转换
OE	OE为输出允许信号，用于控制三条输出锁存器向单片机输出转换得到的数据。OE＝1，输出转换得到的数据；OE＝0，输出数据线呈高阻状态。D7－D0 为数字量输出线。
D7－D0	数字量输出线
CLK	时钟输入信号线。因ADC0809的内部没有时钟电路，所需时钟信号必须由外界提供，通常使用频率为500KHZ
VREF（＋）	参考电压输入正极
VREF（－）	参考电压输入负极

五、STM32F103ZE驱动程序

#include "stm32f10x.h"

#define CLK GPIO_Pin_0
//#define B     GPIO_Pin_1
//#define C        GPIO_Pin_2
#define ALE GPIO_Pin_4
//#define IN0 GPIO_Pin_4
#define ST    GPIO_Pin_5
#define OE    GPIO_Pin_6
//#define A     GPIO_Pin_7

#define D0     GPIO_Pin_0
#define D1     GPIO_Pin_1
#define D2     GPIO_Pin_2
#define D3     GPIO_Pin_3
#define D4    GPIO_Pin_4
#define D5     GPIO_Pin_5
#define D6     GPIO_Pin_6
#define D7     GPIO_Pin_7
#define EOC GPIO_Pin_8

double val=0;

void delay(u32 kk)
{
  while(kk--);
}

/*
const unsigned short CLK= GPIO_Pin_0;
const unsigned short B=GPIO_Pin_1;
const unsigned short C=GPIO_Pin_2;
const unsigned short ALE=GPIO_Pin_3;
const unsigned short IN0=GPIO_Pin_4;
const unsigned short ST=GPIO_Pin_5;
const unsigned short OE=GPIO_Pin_6;
const unsigned short A=GPIO_Pin_7;

const unsigned short D0=GPIO_Pin_0;
const unsigned short D1=GPIO_Pin_1;
const unsigned short D2=GPIO_Pin_2;
const unsigned short D3=GPIO_Pin_3;
const unsigned short D4=GPIO_Pin_4;
const unsigned short D5=GPIO_Pin_5;
const unsigned short D6=GPIO_Pin_6;
const unsigned short D7=GPIO_Pin_7;
const unsigned short EOC=GPIO_Pin_8;
*/

void ad_init()
{

    GPIO_InitTypeDef GPIO_InitStructure;
    RCC_APB2PeriphClockCmd(RCC_APB2Periph_GPIOA, ENABLE);

    GPIO_InitStructure.GPIO_Pin = GPIO_Pin_0|GPIO_Pin_1|GPIO_Pin_2|GPIO_Pin_3|GPIO_Pin_4|GPIO_Pin_5|GPIO_Pin_6|GPIO_Pin_7|GPIO_Pin_8;
    GPIO_InitStructure.GPIO_Mode =  GPIO_Mode_Out_PP;
    GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz;
     GPIO_Init(GPIOA, &GPIO_InitStructure);

    RCC_APB2PeriphClockCmd(RCC_APB2Periph_GPIOB, ENABLE);
    GPIO_InitStructure.GPIO_Pin = GPIO_Pin_0|GPIO_Pin_1|GPIO_Pin_2|GPIO_Pin_3|GPIO_Pin_4|GPIO_Pin_5|GPIO_Pin_6|GPIO_Pin_7|GPIO_Pin_8;
    GPIO_InitStructure.GPIO_Mode = GPIO_Mode_IN_FLOATING;
    GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz;
    GPIO_Init(GPIOB, &GPIO_InitStructure);

    GPIO_ResetBits(GPIOA, ALE);
//    GPIO_ResetBits(GPIOA, A);
//    GPIO_ResetBits(GPIOA, B);
//    GPIO_ResetBits(GPIOA, C);
     //delay(10);

    GPIO_SetBits(GPIOA, ALE);
    //CLK
}

void adc0809_input()
{
    //ST²úÉúÉÏÉýÑغÍϽµÑØ
    GPIO_ResetBits(GPIOA, ST);
    delay(10);
    GPIO_SetBits(GPIOA,ST);
    delay(10);
    GPIO_ResetBits(GPIOA, ST);
    delay(10);
    while(GPIO_ReadInputDataBit(GPIOB, EOC)==0);

    GPIO_SetBits(GPIOA,OE);
    val=GPIO_ReadInputDataBit(GPIOB, D0)*0x0001+
         GPIO_ReadInputDataBit(GPIOB, D1)*0x0002+
       GPIO_ReadInputDataBit(GPIOB, D2)*0x0004+
       GPIO_ReadInputDataBit(GPIOB, D3)*0x0008+
       GPIO_ReadInputDataBit(GPIOB, D4)*0x0010+
       GPIO_ReadInputDataBit(GPIOB, D5)*0x0020+
       GPIO_ReadInputDataBit(GPIOB, D6)*0x0040+
       GPIO_ReadInputDataBit(GPIOB, D7)*0x0080;

    GPIO_ResetBits(GPIOA,OE);

    //val=val*2*0.98;
}

void timer_init()         //¶¨Ê±Æ÷ÖжÏÅäÖÃ
{

    NVIC_InitTypeDef NVIC_InitStructure;      //ÅäÖÃÖжϽṹ
    TIM_TimeBaseInitTypeDef TIM_TimeBaseStructure;

    RCC_APB2PeriphClockCmd(RCC_APB2Periph_GPIOA, ENABLE);
    RCC_APB1PeriphClockCmd(RCC_APB1Periph_TIM3, ENABLE);

      NVIC_PriorityGroupConfig(NVIC_PriorityGroup_0);                     //ÅäÖÃÄÚ²¿Ê±ÖÓ
    NVIC_InitStructure.NVIC_IRQChannel=TIM3_IRQn;
    NVIC_InitStructure.NVIC_IRQChannelPreemptionPriority=0;
    NVIC_InitStructure.NVIC_IRQChannelSubPriority=0;
    NVIC_InitStructure.NVIC_IRQChannelCmd=ENABLE;
    NVIC_Init(&NVIC_InitStructure);//¶¨Ê±Æ÷3µÄÖжϳõʼ»¯

      TIM_TimeBaseStructure.TIM_Period=100;      //ÓëÏÂÒ»ÐÐÓï¾äÅäºÏ£¬µ¥Æ¬»úʱÖÓÐźÅĬÈÏÇé¿öÏÂÊÇ72MHz£¬¸Ä10000Õâ¸öÊý¿ÉÒÔÉèÖÃÖжÏʱ¼ä
    TIM_TimeBaseStructure.TIM_Prescaler=72;    //ÕâÐÐÒ²¿ÉÒԸģ¬µ«ÊÇΪÁËÊý¾Ý·ÖÅäÇå³þ£¬»¹ÊÇÉÏÒ»ÐÐÕû°ÙÕû°ÙµØ¸Ä±È½ÏºÃ
    TIM_TimeBaseStructure.TIM_ClockDivision=TIM_CKD_DIV1;
    TIM_TimeBaseStructure.TIM_CounterMode=TIM_CounterMode_Up;
    TIM_TimeBaseInit(TIM3, &TIM_TimeBaseStructure);
    TIM_ITConfig(TIM3,TIM_IT_Update|TIM_IT_Trigger,ENABLE);
    TIM_Cmd(TIM3, ENABLE);
}

int i=1;
void TIM3_IRQHandler()
{
  if(TIM_GetITStatus(TIM3,TIM_IT_Update)!=RESET) //È·¶¨½øÈëÁËÕâ¸öÖжÏ
  {
    TIM_ClearITPendingBit(TIM3, TIM_IT_Update);            //    Çå³ý±êÖ¾£¬±£ÏÕÆð¼ûÒª¼Ó
    adc0809_input();
        if(i==1)
        {
            GPIO_SetBits(GPIOA, GPIO_Pin_8);
        i=0;
        }

        else
        {
            i=1;
        GPIO_ResetBits(GPIOA, GPIO_Pin_8);
        }
  }
}

void ADC0809_Clock()
{
   TIM_TimeBaseInitTypeDef TIM_TimeBaseStructure;
   TIM_OCInitTypeDef TIM_OCInitStructure;
     GPIO_InitTypeDef GPIO_InitStructure;

  RCC_APB1PeriphClockCmd(RCC_APB1Periph_TIM2, ENABLE);
  RCC_APB2PeriphClockCmd(RCC_APB2Periph_GPIOA|RCC_APB2Periph_AFIO, ENABLE);

    GPIO_InitStructure.GPIO_Pin = GPIO_Pin_0;
    GPIO_InitStructure.GPIO_Mode =  GPIO_Mode_AF_PP;
    GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz;
     GPIO_Init(GPIOA, &GPIO_InitStructure);

      //PWM--->100Hz
  TIM_TimeBaseStructure.TIM_Period=10;
  TIM_TimeBaseStructure.TIM_Prescaler=12;
  TIM_TimeBaseStructure.TIM_ClockDivision=TIM_CKD_DIV1;
  TIM_TimeBaseStructure.TIM_CounterMode=TIM_CounterMode_Up;
  TIM_TimeBaseInit(TIM2, &TIM_TimeBaseStructure);
//  //PA6--->50%                                             //?????
  TIM_OCInitStructure.TIM_OCMode=TIM_OCMode_PWM1;
  TIM_OCInitStructure.TIM_OutputState = TIM_OutputState_Enable;
  TIM_OCInitStructure.TIM_Pulse=5;                    //pulse????period??????
    TIM_OCInitStructure.TIM_OutputState=TIM_OutputState_Enable;
  TIM_OCInitStructure.TIM_OCPolarity=TIM_OCPolarity_High;
  TIM_OC1Init(TIM2, &TIM_OCInitStructure);
    //  //PA7--->40%
//  TIM_OCInitStructure.TIM_Pulse=40;
//  TIM_OC2Init(TIM3, &TIM_OCInitStructure);
//  //PB0--->60%
//  TIM_OCInitStructure.TIM_Pulse=60;
//  TIM_OC3Init(TIM3, &TIM_OCInitStructure);
//  //PB1--->80%
//  TIM_OCInitStructure.TIM_Pulse=80;
//  TIM_OC4Init(TIM3, &TIM_OCInitStructure);

     TIM_Cmd(TIM2, ENABLE);
}

int main()
{      

      ad_init();
      GPIO_SetBits(GPIOA, GPIO_Pin_3);
    ADC0809_Clock();
      timer_init();   

    while(1)
        {

        }
}