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()
{
//ST2úéúé?éy??oí???μ??
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±?÷?D??????
{
NVIC_InitTypeDef NVIC_InitStructure; //?????D???á11
TIM_TimeBaseInitTypeDef TIM_TimeBaseStructure;
RCC_APB2PeriphClockCmd(RCC_APB2Periph_GPIOA, ENABLE);
RCC_APB1PeriphClockCmd(RCC_APB1Periph_TIM3, ENABLE);
NVIC_PriorityGroupConfig(NVIC_PriorityGroup_0); //?????ú2?ê±?ó
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±?÷3μ??D??3?ê??ˉ
TIM_TimeBaseStructure.TIM_Period=100; //ó???ò?DDó?????o?￡?μ￥???úê±?óD?o???è??é????ê?72MHz￡???10000?a??êy?éò?éè???D??ê±??
TIM_TimeBaseStructure.TIM_Prescaler=72; //?aDDò2?éò???￡?μ?ê??aá?êy?Y·?????3t￡??1ê?é?ò?DD??°ù??°ùμ???±è??o?
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·?¨??è?á??a???D??
{
TIM_ClearITPendingBit(TIM3, TIM_IT_Update); // ??3y±ê??￡?±￡???e??òa?ó
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)
{
}
}
时间： 2024-10-11 03:52:58