基于STC12C5A60S2的ADXL345程序

1、基于stc12c5a60s2的adxl345z程序（12t单片机未测试）头文件i2c.h#ifndef _i2c_h_#define _i2c_h_#include /-重定义关键词-/#ifndef uchar#define uchar unsigned char#endif#ifndef uint #define uint unsigned int#endif/-定义使用的io口-/sbit i2c_scl = p02;sbit i2c_sda = p01;/-声明全局变量-/void i2c_delay10us();void i2c_start();void i2c_stop();uch

2、ar i2c_sendbyte(uchar dat, uchar ack);/ uchar i2c_readbyte();uchar i2c_readbyte(uchar ack);void i2c_ack(void);void i2c_nack(void);#endif源文件i2c.c#include i2c.hvoid i2c_delay10us()/12.000mhzunsigned char i;i = 12;while (-i);void i2c_start()i2c_sda = 1;i2c_delay10us();i2c_scl = 1;i2c_delay10us();/建立时间是

3、i2c_sda保持时间4.7usi2c_sda = 0;i2c_delay10us();/保持时间是4usi2c_scl = 0;i2c_delay10us();void i2c_stop()i2c_sda = 0;i2c_delay10us();i2c_scl = 1;i2c_delay10us();/建立时间大于4.7usi2c_sda = 1;i2c_delay10us();uchar i2c_sendbyte(uchar dat, uchar ack)uchar a = 0,b = 0;/最大255，一个机器周期为1us，最大延时255us。for(a=0; a 7; /起始信号之后i

4、2c_scl=0，所以可以直接改变i2c_sda信号dat = dat 4.7usi2c_scl = 0;i2c_delay10us();/时间大于4usi2c_sda = 1;i2c_delay10us();i2c_scl = 1;while(i2c_sda & (ack = 1)/等待应答，也就是等待从设备把i2c_sda拉低b+;if(b 200) /如果超过200us没有应答发送失败，或者为非应答，表示接收结束i2c_scl = 0;i2c_delay10us();return 0;i2c_scl = 0;i2c_delay10us(); return 1;uchar i2c_read

5、byte(unsigned char ack)uchar a = 0,dat = 0;i2c_sda = 1;/起始和发送一个字节之后i2c_scl都是0i2c_delay10us();for(a=0; a8; a+)/接收8个字节i2c_scl = 1;i2c_delay10us();dat = 1;dat |= i2c_sda;i2c_delay10us();i2c_scl = 0;i2c_delay10us();if(!ack)i2c_nack();elsei2c_ack();return dat;void i2c_ack(void)i2c_scl=0;i2c_sda=0;i2c_del

6、ay10us();i2c_scl=1;i2c_delay10us();i2c_scl=0;/不产生ack应答 void i2c_nack(void)i2c_scl=0;i2c_sda=1;i2c_delay10us();i2c_scl=1;i2c_delay10us();i2c_scl=0;头文件adxl345z.h#ifndef _adxl345z_h#define _adxl345z_h#include #include i2c.h#ifndef u8#define u8 unsigned char#endif#ifndef u16 #define u16 unsigned int#end

7、if#define device_id0x00 /器件id,0xe5#define thresh_tap0x1d /敲击阀值#define ofsx0x1e#define ofsy0x1f#define ofsz0x20#define dur0x21#define latent0x22#define window 0x23 #define thresh_ack0x24#define thresh_inact0x25 #define time_inact0x26#define act_inact_ctl0x27 #define thresh_ff0x28#define time_ff0x29 #

8、define tap_axes0x2a #define act_tap_status 0x2b #define bw_rate0x2c #define power_ctl0x2d #define int_enable0x2e#define int_map0x2f#define int_source 0x30#define data_format 0x31#define data_x00x32#define data_x10x33#define data_y00x34#define data_y10x35#define data_z00x36#define data_z10x37#define

9、fifo_ctl0x38#define fifo_status0x39/用户配置，跟硬件电路有关,vdd-io接高电平则为此地址，接地请查看数据手册#define adxl_read 0x3b#define adxl_write 0x3au8 adxl345_init(void); /初始化adxl345void adxl345_wr_reg(u8 addr,u8 val);/写adxl345寄存器u8 adxl345_rd_reg(u8 addr);/读adxl345寄存器void adxl345_rd_xyz(short *x,short *y,short *z);/读取一次值void a

10、dxl345_rd_avval(short *x,short *y,short *z);/读取平均值void adxl345_auto_adjust(char *xval,char *yval,char *zval);/自动校准void adxl345_read_average(short *x,short *y,short *z,u8 times);/连续读取times次,取平均short adxl345_get_angle(float x,float y,float z,u8 dir);void adxl_show_num(u16 x,u16 y,short num,u8 mode);#e

11、ndif源文件adxl345z.c#include adxl345z.h#include oled.h#include u8 adxl345_init(void) u8 temp=adxl345_rd_reg(device_id);if(temp=0xe5)/读取器件id adxl345_wr_reg(data_format,0x2b);/低电平中断输出,13位全分辨率,输出数据右对齐,16g量程 adxl345_wr_reg(bw_rate,0x0a);/数据输出速度为100hzadxl345_wr_reg(power_ctl,0x28); /链接使能,测量模式adxl345_wr_reg(

12、int_enable,0x00);/不使用中断 adxl345_wr_reg(ofsx,0x00);adxl345_wr_reg(ofsy,0x00);adxl345_wr_reg(ofsz,0x00);return 0;else return 1;void adxl345_wr_reg(u8 addr,u8 val)i2c_start();i2c_sendbyte(adxl_write,1);/发送写器件指令，等待应答i2c_sendbyte(addr,1);/发送寄存器地址i2c_sendbyte(val,1);/发送要写入的值i2c_stop();u8 adxl345_rd_reg(u8

13、 addr)u8 temp;i2c_start(); i2c_sendbyte(adxl_write,1);/发送写器件指令，等待应答i2c_sendbyte(addr,1);/发送寄存器地址i2c_start();/重新开始起始信号，无需发送结束信号i2c_sendbyte(adxl_read,1);/发送写器件指令，等待应答temp=i2c_readbyte(0);/读取寄存器内容i2c_stop();return temp;/读取3个轴的数据/x,y,z:读取到的数据void adxl345_rd_xyz(short *x,short *y,short *z)u8 buf6;u8 i;i

14、2c_start(); i2c_sendbyte(adxl_write,1);/发送写器件指令i2c_sendbyte(data_x0,1); i2c_start(); /重新启动i2c_sendbyte(adxl_read,1);/发送读器件指令for(i=0;i6;i+) if(i=5) bufi=i2c_readbyte(0);/读取一个字节,不继续再读,发送nack else bufi=i2c_readbyte(1); i2c_stop();/产生一个停止条件*x=(short)(u16)buf18)+buf0); *y=(short)(u16)buf38)+buf2); *z=(sh

15、ort)(u16)buf58)+buf4); void adxl345_read_average(short *x,short *y,short *z,u8 times)u8 i;short tx,ty,tz;*x=0;*y=0;*z=0;if(times)/读取次数不为0for(i=0;itimes;i+)/连续读取times次adxl345_rd_xyz(&tx,&ty,&tz);*x+=tx;*y+=ty;*z+=tz;delay_ms(1);*x/=times;*y/=times;*z/=times;/得到角度/x,y,z:x,y,z方向的重力加速度分量(不需要单位,直接数值即可)/d

16、ir:要获得的角度.0,与z轴的角度;1,与x轴的角度;2,与y轴的角度./返回值:角度值.单位0.1.short adxl345_get_angle(float x,float y,float z,u8 dir)float temp; float res=0;switch(dir)case 0:/与自然z轴的角度 temp=sqrt(x*x+y*y)/z; res=atan(temp); break;case 1:/与自然x轴的角度 temp=x/sqrt(y*y+z*z); res=atan(temp); break; case 2:/与自然y轴的角度 temp=y/sqrt(x*x+z*

17、z); res=atan(temp); break; return res*1800/3.14;/读取adxl的平均值/x,y,z:读取10次后取平均值void adxl345_rd_avval(short *x,short *y,short *z)short tx=0,ty=0,tz=0; u8 i; for(i=0;i10;i+)adxl345_rd_xyz(x,y,z);delay_ms(10);tx+=(short)*x;ty+=(short)*y;tz+=(short)*z; *x=tx/10;*y=ty/10;*z=tz/10; /自动校准/xval,yval,zval:x,y,z

18、轴的校准值void adxl345_auto_adjust(char *xval,char *yval,char *zval)short tx,ty,tz;u8 i;short offx=0,offy=0,offz=0;adxl345_wr_reg(power_ctl,0x00); /先进入休眠模式.delay_ms(100);adxl345_wr_reg(data_format,0x2b);/低电平中断输出,13位全分辨率,输出数据右对齐,16g量程 adxl345_wr_reg(bw_rate,0x0a);/数据输出速度为100hzadxl345_wr_reg(power_ctl,0x28

19、); /链接使能,测量模式adxl345_wr_reg(int_enable,0x00);/不使用中断 adxl345_wr_reg(ofsx,0x00);adxl345_wr_reg(ofsy,0x00);adxl345_wr_reg(ofsz,0x00);delay_ms(12);for(i=0;i10;i+)adxl345_rd_avval(&tx,&ty,&tz);offx+=tx;offy+=ty;offz+=tz; offx/=10;offy/=10;offz/=10;*xval=-offx/4;*yval=-offy/4;*zval=-(offz-256)/4; adxl345_

20、wr_reg(ofsx,*xval);adxl345_wr_reg(ofsy,*yval);adxl345_wr_reg(ofsz,*zval); /mode：0，显示加速度；1，显示角度void adxl_show_num(u16 x,u16 y,short num,u8 mode)if(mode=0)/显示加速度值if(num0)oled_showchar(x,y,-);/显示负号num=-num;/转为正数else oled_showchar(x,y, );/去掉负号oled_shownum(x+8,y,num,4,16);/显示值 else /显示角度值if(num0)oled_sho

21、wchar(x,y,-);/显示负号num=-num;/转为正数else oled_showchar(x,y, );/去掉负号 oled_shownum(x+8,y,num/10,2,16);/显示整数部分 oled_showchar(x+24,y,.);/显示小数点oled_shownum(x+32,y,num%10,1,16); /显示小数部分 头文件oled.h#ifndef _oled_h#define _oled_h#include #define u8 unsigned char #define u32 unsigned int #define oled_cmd 0/写命令#def

22、ine oled_data 1/写数据#define oled_mode 0 /0:4线串行模式 1:并行8080模式/-oled端口定义- sbit oled_cs=p00; /片选sbit oled_rst =p15;/复位sbit oled_dc =p22;/数据/命令控制sbit oled_scl=p20;/时钟 d0（sclk)sbit oled_sdin=p21;/d1（mosi） 数据/信号控制函数#define oled_cs_clr() oled_cs=0#define oled_cs_set() oled_cs=1#define oled_rst_clr() oled_rs

23、t=0#define oled_rst_set() oled_rst=1#define oled_dc_clr() oled_dc=0#define oled_dc_set() oled_dc=1#define oled_sclk_clr() oled_scl=0#define oled_sclk_set() oled_scl=1#define oled_sdin_clr() oled_sdin=0#define oled_sdin_set() oled_sdin=1;/#define size 16#define xlevell0x02#define xlevelh0x10#define m

24、ax_column128#define max_row64#definebrightness0xff #define x_width 128#define y_width 64 void delay_ms(unsigned int ms); /oled控制用函数void oled_wr_byte(u8 dat,u8 cmd); void oled_display_on(void);void oled_display_off(void); void oled_init(void);void oled_clear(void);void oled_drawpoint(u8 x,u8 y,u8 t);

25、void oled_fill(u8 x1,u8 y1,u8 x2,u8 y2,u8 dot);void oled_showchar(u8 x,u8 y,u8 chr);void oled_shownum(u8 x,u8 y,u32 num,u8 len,u8 size2);void oled_showstring(u8 x,u8 y, u8 *p); void oled_set_pos(unsigned char x, unsigned char y);void oled_showchinese(u8 x,u8 y,u8 no);void oled_drawbmp(unsigned char

26、x0, unsigned char y0,unsigned char x1, unsigned char y1,unsigned char bmp);#endif 源文件oled.c#include oled.h#include oledfont.h void delay_ms(unsigned int ms) unsigned int a;while(ms)a=1800;while(a-);ms-;return;#if oled_mode=1/向ssd1106写入一个字节。/dat:要写入的数据/命令/cmd:数据/命令标志 0,表示命令;1,表示数据;void oled_wr_byte(u

27、8 dat,u8 cmd)dataout(dat); if(cmd) oled_dc_set();else oled_dc_clr(); oled_cs_clr();oled_wr_clr(); oled_wr_set();oled_cs_set(); oled_dc_set(); #else/向ssd1306写入一个字节。/dat:要写入的数据/命令/cmd:数据/命令标志 0,表示命令;1,表示数据;void oled_wr_byte(u8 dat,u8 cmd)u8 i; if(cmd) oled_dc_set();else oled_dc_clr(); oled_cs_clr();fo

28、r(i=0;i8;i+) oled_sclk_clr();if(dat&0x80) oled_sdin_set();else oled_sdin_clr();oled_sclk_set();dat4)|0x10,oled_cmd);oled_wr_byte(x&0x0f)|0x01,oled_cmd); /开启oled显示 void oled_display_on(void)oled_wr_byte(0x8d,oled_cmd); /set dcdc命令oled_wr_byte(0x14,oled_cmd); /dcdc onoled_wr_byte(0xaf,oled_cmd); /disp

29、lay on/关闭oled显示 void oled_display_off(void)oled_wr_byte(0x8d,oled_cmd); /set dcdc命令oled_wr_byte(0x10,oled_cmd); /dcdc offoled_wr_byte(0xae,oled_cmd); /display off /清屏函数,清完屏,整个屏幕是黑色的!和没点亮一样! void oled_clear(void) u8 i,n; for(i=0;i8;i+) oled_wr_byte (0xb0+i,oled_cmd); /设置页地址（07）oled_wr_byte (0x00,oled

30、_cmd); /设置显示位置列低地址oled_wr_byte (0x10,oled_cmd); /设置显示位置列高地址 for(n=0;nmax_column-1)x=0;y=y+2;if(size =16)oled_set_pos(x,y);for(i=0;i8;i+)oled_wr_byte(f8x16c*16+i,oled_data);oled_set_pos(x,y+1);for(i=0;i8;i+)oled_wr_byte(f8x16c*16+i+8,oled_data);else oled_set_pos(x,y+1);for(i=0;i6;i+)oled_wr_byte(f6x8

31、ci,oled_data);/mn函数u32 oled_pow(u8 m,u8 n)u32 result=1; while(n-)result*=m; return result; /显示2个数字/x,y :起点坐标 /len :数字的位数/size:字体大小/mode:模式0,填充模式;1,叠加模式/num:数值(04294967295); void oled_shownum(u8 x,u8 y,u32 num,u8 len,u8 size2) u8 t,temp;u8 enshow=0; for(t=0;tlen;t+)temp=(num/oled_pow(10,len-t-1)%10;i

32、f(enshow=0&t120)x=0;y+=2;j+;/显示汉字void oled_showchinese(u8 x,u8 y,u8 no) u8 t,adder=0;oled_set_pos(x,y); for(t=0;t16;t+)oled_wr_byte(hzk2*not,oled_data);adder+=1; oled_set_pos(x,y+1); for(t=0;t16;t+)oled_wr_byte(hzk2*no+1t,oled_data);adder+=1; /*功能描述：显示显示bmp图片12864起始点坐标(x,y),x的范围0127，y为页的范围07*/void o

33、led_drawbmp(unsigned char x0, unsigned char y0,unsigned char x1, unsigned char y1,unsigned char bmp) unsigned int j=0; unsigned char x,y; if(y1%8=0) y=y1/8; else y=y1/8+1;for(y=y0;yy1;y+)oled_set_pos(x0,y); for(x=x0;xx1;x+) oled_wr_byte(bmpj+,oled_data); /初始化ssd1306 void oled_init(void) oled_rst_set

34、();delay_ms(100);oled_rst_clr();delay_ms(100);oled_rst_set(); oled_wr_byte(0xae,oled_cmd);/-turn off oled paneloled_wr_byte(0x00,oled_cmd);/-set low column addressoled_wr_byte(0x10,oled_cmd);/-set high column addressoled_wr_byte(0x40,oled_cmd);/-set start line address set mapping ram display start l

35、ine (0x000x3f)oled_wr_byte(0x81,oled_cmd);/-set contrast control registeroled_wr_byte(0xcf,oled_cmd); / set seg output current brightnessoled_wr_byte(0xa1,oled_cmd);/-set seg/column mapping 0xa0左右反置 0xa1正常oled_wr_byte(0xc8,oled_cmd);/set com/row scan direction 0xc0上下反置 0xc8正常oled_wr_byte(0xa6,oled_c

36、md);/-set normal displayoled_wr_byte(0xa8,oled_cmd);/-set multiplex ratio(1 to 64)oled_wr_byte(0x3f,oled_cmd);/-1/64 dutyoled_wr_byte(0xd3,oled_cmd);/-set display offsetshift mapping ram counter (0x000x3f)oled_wr_byte(0x00,oled_cmd);/-not offsetoled_wr_byte(0xd5,oled_cmd);/-set display clock divide

37、ratio/oscillator frequencyoled_wr_byte(0x80,oled_cmd);/-set divide ratio, set clock as 100 frames/secoled_wr_byte(0xd9,oled_cmd);/-set pre-charge periodoled_wr_byte(0xf1,oled_cmd);/set pre-charge as 15 clocks & discharge as 1 clockoled_wr_byte(0xda,oled_cmd);/-set com pins hardware configurationoled_wr_byte(0x12,oled_cmd);oled_wr_byte(0xdb,oled