三軸角度檢測(傾角傳感器MMA7455(加速度傳感器))

1、#include <reg52.h>#include <intrins.h> /要用到_nop_();函數(shù)#define uchar unsigned char#define uint  unsigned int/*/*               單片機引腳定義            

2、0;          */*/sbit sda=P10;              /I2C 數(shù)據(jù)傳送位sbit scl=P11;              /I2C 時鐘傳送位char x,y,z,num9=0,0,0;/*/* 

3、60;                   數(shù)據(jù)部分                            */*/#define IIC_READ&

4、#160; 0x1D      /定義讀指令#define IIC_WRITE 0x1D      /定義寫指令#define LCD_data  P0             /數(shù)據(jù)口sbit inter_0=P32;sbit LCD_RS  =  P27;       

5、60;    /寄存器選擇輸入 sbit LCD_RW  =  P26;            /液晶讀/寫控制sbit LCD_EN  =  P25;            /液晶使能控制sbit LCD_PSB =  P24;     

6、       /串/并方式控制void delay_1ms(uint x)  uint i,j; for(j=0;j<x;j+)   for(i=0;i<110;i+);   /*/*                     &

7、#160;                                           */*寫指令數(shù)據(jù)到LCD     

8、                                             */*RS=L，RW=L，E=高脈沖，D0-D7=指令碼。 

9、                            */*                      &#

10、160;                                          */*/void write_cmd(uchar cmd)   &#

11、160;                          LCD_RS = 0;    LCD_RW = 0;    LCD_EN = 0;    P0 = cmd; delay_1ms(5);    LCD_EN =

12、 1; delay_1ms(5);    LCD_EN = 0;  /*/*                                      

13、0;                          */*寫顯示數(shù)據(jù)到LCD                      

14、60;                           */*RS=H，RW=L，E=高脈沖，D0-D7=數(shù)據(jù)。                  

15、0;            */*                                      

16、                           */*/void write_dat(uchar dat)                   

17、           LCD_RS = 1;    LCD_RW = 0;    LCD_EN = 0;    P0 = dat; delay_1ms(5);    LCD_EN = 1; delay_1ms(5);    LCD_EN = 0;  /*/*    &#

18、160;                                                  *

19、/* 設(shè)定顯示位置                                          */*       

20、;                                                */*/void lcd_pos

21、(uchar X,uchar Y)                             uchar  pos;   if (X=0)     X=0x80;   else if (X=1)   &

22、#160; X=0x90;   else if (X=2)     X=0x88;   else if (X=3)     X=0x98;   pos = X+Y ;     write_cmd(pos);     /顯示地址/*/*            &

23、#160;                                                 &

24、#160;  */*  LCD初始化設(shè)定                                             

25、     */*                                             &#

26、160;                   */*/void lcd_init()     LCD_PSB = 1;         /并口方式      write_cmd(0x30);     

27、 /基本指令操作    delay_1ms(5);    write_cmd(0x0C);      /顯示開，關(guān)光標    delay_1ms(5);    write_cmd(0x01);      /清除LCD的顯示內(nèi)容    delay_1ms(5);    uchar set_key_sign;&#

28、160;  /是否在設(shè)置狀態(tài)標志uchar delaysign;   /視覺停留標志uchar xposivalue;   /x正方向滿格顯示g值uchar xnegavalue;   /x反方向滿格顯示g值uchar yposivalue;   /y正方向滿格顯示g值uchar ynegavalue;   /y反方向滿格顯示g值/11111111 11111110 11111100 - 10000000 00000000&#

29、160;led_mai：i為亮燈數(shù)量uchar led_ma9=0xff,0xfe,0xfc,0xf8,0xf0,0xe0,0xc0,0x80,0x00; uchar xposiupstate;   /x正方向上8個LED顯示狀態(tài)uchar xposidownstate;  /x正方向下8個LED顯示狀態(tài)uchar xnegaupstate;   /x反方向上8個LED顯示狀態(tài)uchar xnegadownstate;  /x反方向下8個LED顯示狀態(tài)uchar yupstate;&#

30、160;   /y方向上8個LED顯示狀態(tài)uchar ydownstate;   /y方向下8個LED顯示狀態(tài)uchar xposilightnum;  /x正方向亮燈數(shù)量（116）uchar xnegalightnum;  /x反方向亮燈數(shù)量（116）uchar yposilightnum;  /y正方向亮燈數(shù)量（18）uchar ynegalightnum;  /x正方向亮燈數(shù)量（18）uchar  ack_sign;  

31、 /I2C 應(yīng)答標志/*/*                  各延時程序                    */*/void iic_delay()      &#

32、160; /5us延時 _nop_(); _nop_(); _nop_(); _nop_();void delay_50us(uint t)    uchar j; for(;t>0;t-) for(j=19;j>0;j-);void delay_50ms(uchar t)    uint j; for(;t>0;t-) for(j=6245;j>0;j-);/*/*     

33、60;         I2C通信部分              */*/void iic_start()               /函數(shù)功能：I2C通信開始 sda=1;    iic_delay();&

34、#160;scl=1;    iic_delay(); sda=0; iic_delay(); void iic_stop()                /函數(shù)功能：I2C通信停止 sda=0; iic_delay(); scl=1; iic_delay(); sda=1; iic_delay(); void ii

35、c_ack()                 /函數(shù)功能：I2C通信查應(yīng)答位     sda=1; scl=1; iic_delay(); ack_sign=sda; scl=0;    void iic_write_byte(uchar wdata)/函數(shù)功能：向I2C從機寫入一個字節(jié)  

36、60;  uchar i,temp,temp1;  temp1=wdata;     for(i=0;i<8;i+)              scl = 0;    iic_delay();    temp=temp1;    temp=temp&0x80; &#

37、160;  if(temp=0x80)     sda=1;        else     sda=0;     iic_delay();     scl=1;     iic_delay();    

38、60;scl=0;     iic_delay();     temp1=temp1<<1;    char iic_read_byte(void)    /函數(shù)功能：從I2C從機中讀出一個字節(jié)     uchar x;  char data_data;     for (x=0;x<8;x+)  &

39、#160;    data_data=data_data<<1;  sda=1;  iic_delay();  scl=0;  iic_delay();  scl=1;  iic_delay();  if(sda=1)     data_data|=0x01;   /else    /  

40、; data_data&=0xfe;  return data_data;void iic_write(uchar byte_add,uchar wdata)/函數(shù)功能：按地址寫入一字節(jié)數(shù)據(jù)     uchar t;  t=(IIC_WRITE<<1);  iic_start();  iic_write_byte(t);  iic_ack();  iic_write_byte(byte_add);  iic_ack();  iic_write_byte(wdata);  iic_ack();  iic_stop();char iic_read(uchar byte_add)            /函數(shù)功能：按地址讀出一字節(jié)數(shù)據(jù)