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STM32 模擬IIC協(xié)議驅(qū)動TEA5767

作者： 時間：2016-12-02 來源：網(wǎng)絡(luò) 收藏
IIC驅(qū)動程序參考自《ALIENTEK MINISTM32 實驗16 IIC實驗》，做了簡單的修改就輕易驅(qū)動TEA5767。至于TEA5767內(nèi)部寄存器的配置就不說了?？闯绦颍?wbr />
文件：I2C_Driver.h
#ifndef __I2C_Driver_H
#define __I2C_Driver_H
#define uchar unsigned char
#define uint unsigned short int
#define ulint unsigned int
#define delay_nus 2
//IO方向設(shè)置
#define SDA_IN() {GPIOB->CRH&=0XFFFF0FFF;GPIOB->CRH|=8<<12;}//
#define SDA_OUT() {GPIOB->CRH&=0XFFFF0FFF;GPIOB->CRH|=3<<12;}
//IO操作函數(shù)
#define IIC_SCL PBout(10) //SCL
#define IIC_SDA PBout(11) //SDA
#define READ_SDA PBin(11) //輸入SDA
//IIC所有操作函數(shù)
void IIC_Init(void); //初始化IIC的IO口
void IIC_Start(void); //發(fā)送IIC開始信號
void IIC_Stop(void); //發(fā)送IIC停止信號
void IIC_Send_Byte(uchar txd); //IIC發(fā)送一個字節(jié)
uchar IIC_Read_Byte(unsigned char ack);//IIC讀取一個字節(jié)
uchar IIC_Wait_Ack(void); //IIC等待ACK信號
void IIC_Ack(void); //IIC發(fā)送ACK信號
void IIC_NAck(void); //IIC不發(fā)送ACK信號
void IIC_Write_One_Byte(uchar daddr,uchar addr,uchar data);
uchar IIC_Read_One_Byte(uchar daddr,uchar addr);
void Write_TEA5767(void);
void Read_TEA5767(void);
void TEA5767(void);
void Radio_Set_Frequency(void);
void Radio_Manual_Search(void);
void Radio_Search (void);
void Radio_Power_Display(void);
void Radio_Frequency_Display(void);
#endif
文件：I2C_Driver.c
#include "I2C_Driver.h"
#include "GUI.h"
#include "enhance.h"
uchar ack_cnt=0;
void delay_us(uint t)
{
t=72*t;
while(t-->0);
}
//初始化IIC
void IIC_Init(void)
{
RCC->APB2ENR|=1<<3;//先使能外設(shè)IO PORTB時鐘
GPIOB->CRH&=0XFFFF00FF;//PB10/11 推挽輸出
GPIOB->CRH|=0X00003300;
GPIOB->ODR|=3<<10; //PB10/11 輸出高
}
//產(chǎn)生IIC起始信號
void IIC_Start(void)
{
SDA_OUT(); //sda線輸出
IIC_SDA=1;
IIC_SCL=1;
delay_us(delay_nus);
IIC_SDA=0;//START:when CLK is high,DATA change form high to low
delay_us(delay_nus);
IIC_SCL=0;//鉗住I2C總線，準備發(fā)送或接收數(shù)據(jù)
}
//產(chǎn)生IIC停止信號
void IIC_Stop(void)
{
SDA_OUT();//sda線輸出
IIC_SCL=0;
IIC_SDA=0;//STOP:when CLK is high DATA change form low to high
delay_us(delay_nus);
IIC_SCL=1;
IIC_SDA=1;//發(fā)送I2C總線結(jié)束信號
delay_us(delay_nus);
}
//等待應(yīng)答信號到來
//返回值：1，接收應(yīng)答失敗
// 0，接收應(yīng)答成功
uchar IIC_Wait_Ack(void)
{
uchar ucErrTime=0;
SDA_IN(); //SDA設(shè)置為輸入
IIC_SDA=1;delay_us(delay_nus);
IIC_SCL=1;delay_us(delay_nus);
while(READ_SDA)
{
ucErrTime++;
if(ucErrTime>250)
{
IIC_Stop();
return 1;
}
}
IIC_SCL=0;//時鐘輸出0
ack_cnt++;
return 0;
}
//產(chǎn)生ACK應(yīng)答
void IIC_Ack(void)
{
IIC_SCL=0;
SDA_OUT();
IIC_SDA=0;
delay_us(delay_nus);
IIC_SCL=1;
delay_us(delay_nus);
IIC_SCL=0;
}
//不產(chǎn)生ACK應(yīng)答
void IIC_NAck(void)
{
IIC_SCL=0;
SDA_OUT();
IIC_SDA=1;
delay_us(delay_nus);
IIC_SCL=1;
delay_us(delay_nus);
IIC_SCL=0;
}
//IIC發(fā)送一個字節(jié)
//返回從機有無應(yīng)答
//1，有應(yīng)答
//0，無應(yīng)答
void IIC_Send_Byte(uchar txd)
{
uchar t;
SDA_OUT();
IIC_SCL=0;//拉低時鐘開始數(shù)據(jù)傳輸
for(t=0;t<8;t++)
{
IIC_SDA=(txd&0x80)>>7;
txd<<=1;
delay_us(delay_nus); //對TEA5767這三個延時都是必須的
IIC_SCL=1;
delay_us(delay_nus);
IIC_SCL=0;
delay_us(delay_nus);
}
}
//讀1個字節(jié)，ack=1時，發(fā)送ACK，ack=0，發(fā)送nACK
uchar IIC_Read_Byte(unsigned char ack) //
{
unsigned char i,receive=0;
SDA_IN();//SDA設(shè)置為輸入
for(i=0;i<8;i++ )
{
delay_us(2);
IIC_SCL=1;
receive<<=1;
delay_us(2);
if(READ_SDA)receive++;
IIC_SCL=0;
}
if (!ack)
IIC_NAck();//發(fā)送nACK
else
IIC_Ack(); //發(fā)送ACK
return receive;
}
///////////////TEA5767/////////////////////
#define W_TEA5767 0xc0
#define R_TEA5767 0xc1
unsigned char Radio_Read_Buf[5]="12345";
unsigned char Radio_Write_Buf[5]={0x2a,0xb6,0x40,0x17,0x40}; //要寫入TEA5767的數(shù)據(jù)
#define Max_frequency 108000
#define Min_frequency 87500
#define Mute_On 1
#define Mute_Off 0
unsigned long Frequency_Write=93600;
unsigned long Frequency_Read=0;
unsigned long pll=0;
unsigned char Search_Mode_Flag=0,Radio_On_Flag=0;//Search_Over=0;
static unsigned char Radio_Search_Flag=0;
unsigned char Radio_Mute=Mute_Off;
void Write_TEA5767(void)
{
uchar i=0;
delay_us(0);
IIC_Start();
IIC_Send_Byte(W_TEA5767);
if(!IIC_Wait_Ack())
{
for(i=0;i<5;i++)
{
IIC_Send_Byte(Radio_Write_Buf[i]);
if(IIC_Wait_Ack())
{
GUI_DispStringAt("Write buffer Failed !",10,100);
break;
}
}
}
else
{
GUI_DispStringAt("Failed !",10,80);
}
IIC_Stop();
}
void Read_TEA5767(void)
{
uchar i=0;
IIC_Start();
IIC_Send_Byte(0xc1);
if (!IIC_Wait_Ack()) //chip addr of read data
{
for (i=0;i<5;i++)
Radio_Read_Buf[i] =(i==4)? IIC_Read_Byte(0):IIC_Read_Byte(1); //the last byte with ACK.
IIC_Stop();
// GUI_DispStringAt("Read TEA5767 Completed !",10,100);
}
else IIC_Stop();
pll=(Radio_Read_Buf[0]&0x3f)*256+Radio_Read_Buf[1]+1; ////!!!!! +1
if(Radio_Write_Buf[2]&0x10)
{
Frequency_Read=pll*8192-225000;
}
else
{
Frequency_Read=pll*8192+225000;
}
}
void Radio_Set_Frequency(void)
{
if(Radio_Write_Buf[2]&0x10)
{
pll=(((Frequency_Write*1000)+225000)*4)/32768;
}
else
{
pll=(((Frequency_Write*1000)-225000)*4)/32768;//本例為低邊帶接收方式
}
Radio_Write_Buf[0] = pll/256;
Radio_Write_Buf[1] = pll%256;
Radio_Write_Buf[0]&= 0x3F;//不靜音不搜索
if(Radio_Mute==Mute_On)
Radio_Write_Buf[0]|=0x80;//
else
Radio_Write_Buf[0]&=0x7f;//
Radio_Write_Buf[2] = 0x00;
Radio_Write_Buf[3] = 0x12;
Radio_Write_Buf[4] = 0x00;
Write_TEA5767();
}
void Radio_Manual_Search(void)
{
if(Search_Mode_Flag)
{
Frequency_Write+=100; //步進100KHZ
if(Frequency_Write>Max_frequency)
{
Frequency_Write=Min_frequency;
}
}
else
{
Frequency_Write-=100;
if(Frequency_Write
{
Frequency_Write=Max_frequency;
}
}
Radio_Set_Frequency();
}
void Radio_Search (void)
{
switch(Radio_Search_Flag)
{
case 0:
{
Radio_Mute=Mute_On; //靜音打開
Radio_Manual_Search();
Radio_Search_Flag=1;
}
case 1:
{
unsigned char Radio_If;
// _delay_ms(100);
Read_TEA5767();
Radio_If=Radio_Read_Buf[2]&0x7f;
if((Radio_Read_Buf[3]>>4)>4) //ADC大于4停止
{
if((Radio_If>0x30)&&(Radio_If<0x3a)) //比較IF
{
Radio_On_Flag=0; //關(guān)閉搜索
Radio_Write_Buf[0]&=0x7f; //靜音關(guān)閉
Write_TEA5767();
}
Radio_Search_Flag=0;
}
else //ADC小于4繼續(xù)
{
Radio_Search_Flag=0;
}
Radio_Frequency_Display();
Radio_Power_Display();
}
}
}
void Radio_Power_Display(void)
{
unsigned char Temp;
Temp = (Radio_Read_Buf[3]>>4);//RF信號強度ADC
GUI_GotoXY(140,0);
GUI_DispString("RF:");
GUI_DispDec(Temp,2);
Temp = (Radio_Read_Buf[2]&0x7f);//中頻計數(shù)結(jié)果，正確調(diào)諧時在【0x31,0x3e】之間
GUI_GotoXY(200,0);
GUI_DispString("IF:");
GUI_DispHex(Temp,2);
if((Temp>=0x31)&&(Temp<=0x3e))
GUI_DispStringAt("Good",200,20);
else
GUI_DispStringAt("Bad ",200,20);
}
void Radio_Frequency_Display(void)
{
char Display_Bit[9]="000.0MHz ";
Frequency_Read=Frequency_Read/1000;
Display_Bit[0] = Frequency_Read / 100000;
if ( Display_Bit[0] == 0 )
{
Display_Bit[0] = 0;
}
else
{
Display_Bit[0] += 0x30;
}
Display_Bit[1] = (Frequency_Read/ 10000)%10 +0x30;
Display_Bit[2] = (Frequency_Read/ 1000)%10 +0x30;
Display_Bit[4] = (Frequency_Read / 100)%10 +0x30;
GUI_DispStringAt(Display_Bit,140,20);
}
void TEA5767(void)
{
static uchar i=0;
if(!i)
{
IIC_Init();
delay_us(0);
IIC_Stop();
i++;
Frequency_Write= 93600;
Radio_Set_Frequency();
}
Read_TEA5767();
Radio_Frequency_Display();
Radio_Power_Display();
GUI_GotoXY(10,0);
GUI_DispString("W:");
TFT_DispHexStringAt(6*2+10,0 ,Radio_Write_Buf,5);
GUI_GotoXY(10,20);
GUI_DispString("R:");
TFT_DispHexStringAt(6*2+10,20,Radio_Read_Buf ,5);
// GUI_DispDecAt(ack_cnt,10,40,3);
}
////////////////////////////////////////////

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