ADXL313倾角测量程序

/****************************************************************** ADXL313测试 程序 ******************************************************************/ #include <C8051F040.h> #include <stdio.h> #include <Intrins.h> #include <math.h> #define uchar unsigned char #define uint unsigned int #define slave_address 0xa6 //ADXL313地址 sbit SDA = P0^2; sbit SCL = P0^3; sfr16 RCAP2 = 0xca; sfr16 TMR2 = 0xcc; sbit LED = P0^7; int buf[5]; unsigned char code cucBit[] = {0x80,0x40,0x20,0x10,0x08,0x04,0x02,0x01}; void Delay_4ms(void); void delay_5us(void); //延时函数 void SYSCLK_Init(void); void PORT_Init(void); void UART0_Init(void); void senddata(unsigned char cjdata); void Delay_40ms(void); void I2C_Start(void); void I2C_Stop(void); void I2C_SenAck(void); void I2C_SenNotAck(void); unsigned char I2C_RecvAck(void); void I2C_Write(unsigned char oneData); unsigned char I2C_Read(void); void ADXL313_single_write(unsigned char reg_address,unsigned char reg_data); unsigned char ADXL313_single_read(unsigned char reg_address); void ADXL313_lianxu_read(void); void ADXL313_Init(void); void main() { int out_X,out_Y,out_Z; unsigned char out_ID=0; WDTCN=0xde; WDTCN=0xad; //关闭看门狗 SYSCLK_Init(); PORT_Init(); UART0_Init(); ADXL313_Init(); while(1) { out_ID = ADXL313_single_read(0x00); //读取ID，默认值为0xAD // delay_5us(); ADXL313_lianxu_read(); _nop_(); out_X = ( buf[1]<<8 ) + buf[0] ; out_Y = ( buf[3]<<8 ) + buf[2] ; out_Z = ( buf[5]<<8 ) + buf[4] ; // senddata(out_ID); senddata(0xa5); senddata(buf[1]); senddata(buf[0]); senddata(buf[3]); senddata(buf[2]); senddata(buf[5]); senddata(buf[4]); senddata(0xaa); //senddata(0xf); } } //延时函数 void delay_5us(void) //12M { _nop_();_nop_();_nop_();_nop_();_nop_();_nop_(); _nop_();_nop_();_nop_();_nop_();_nop_();_nop_(); } void SYSCLK_Init(void) { int j = 0; char SFRPAGE_SAVE = SFRPAGE; SFRPAGE = CONFIG_PAGE; OSCXCN = 0x67; //选择晶体振荡方式，12MHz晶振(0110 0111) for (j = 0; j <13000; j++); // 延时1ms,// at 24 MHz, 1 ms = 24000 SYSCLKs,DJNZ = 2 SYSCLKs while (!(OSCXCN & 0x80)); //晶体振荡器有效标志是否为1 CLKSEL = 0x01; //选择外部振荡器作为系统时钟，不分频 SFRPAGE = SFRPAGE_SAVE; } void PORT_Init(void) { char SFRPAGE_SAVE = SFRPAGE; SFRPAGE = CONFIG_PAGE; XBR0 = 0x04; //P0.0，P0.1连接到UART0，(0000 0100) XBR1 = 0x00; XBR2 = 0x40; //使能交叉开关和弱上拉 P0MDOUT = 0xf0; // SDA,SCL,RX0漏极开路，TX0推挽输出，（0000 1101） SFRPAGE = SFRPAGE_SAVE; } //---------------------------------------串口初始化、数据传输---------------------------------------- void UART0_Init(void) { char SFRPAGE_SAVE; SFRPAGE_SAVE = SFRPAGE; SFRPAGE = TMR2_PAGE; TMR2CN = 0x00; // 定时器2，16位自动重载方式 TMR2CF = 0x08; // 系统时钟，不分频 RCAP2 = -((long)12000000/57600/16); //设置波特率57600 TMR2 = RCAP2; TR2= 1; // 使能定时器2 SFRPAGE = UART0_PAGE; SCON0 = 0x50; //方式1，使能RX SSTA0 = 0x15; // 禁止分频，RX，TX选择T2波特率 // ES0 = 1; // IP |= 0x10; //优先中断 SFRPAGE = SFRPAGE_SAVE; } void senddata(unsigned char cjdata) { char SFRPAGE_SAVE = SFRPAGE; SFRPAGE = UART0_PAGE; SBUF0=cjdata; while(TI0==0); TI0=0; SFRPAGE = SFRPAGE_SAVE; } //****************************************************************************** void I2C_Start(void) { char SFRPAGE_SAVE = SFRPAGE; SFRPAGE = CONFIG_PAGE; SDA = 1; _nop_(); SCL = 1; delay_5us(); SDA = 0; delay_5us(); SCL = 0; _nop_();_nop_(); SFRPAGE = SFRPAGE_SAVE; } void I2C_Stop(void) { char SFRPAGE_SAVE = SFRPAGE; SFRPAGE = CONFIG_PAGE; SDA = 0; _nop_(); SCL = 1; delay_5us(); SDA = 1; delay_5us(); SFRPAGE = SFRPAGE_SAVE; } void I2C_SenAck(void) { char SFRPAGE_SAVE = SFRPAGE; SFRPAGE = CONFIG_PAGE; SDA = 0; SCL = 0; delay_5us(); SCL = 1; delay_5us(); SCL = 0; SFRPAGE = SFRPAGE_SAVE; } void I2C_SenNotAck(void) { char SFRPAGE_SAVE = SFRPAGE; SFRPAGE = CONFIG_PAGE; SDA = 1; SCL = 0; delay_5us(); SCL = 1; delay_5us(); SCL = 0; SFRPAGE = SFRPAGE_SAVE; } unsigned char I2C_RecvAck(void) { unsigned char ucErrTime = 255; //故障接收方无ACK，超时值 char SFRPAGE_SAVE = SFRPAGE; SFRPAGE = CONFIG_PAGE; SCL = 0; SDA = 1; delay_5us(); SCL = 1; delay_5us(); while(SDA) { ucErrTime--; if(ucErrTime == 0) { I2C_Stop(); return 0; } } SCL = 0; return 1; } void I2C_Write(unsigned char oneData) //写一字节数据 { unsigned char i,temp; char SFRPAGE_SAVE = SFRPAGE; SFRPAGE = CONFIG_PAGE; temp = oneData; for(i=0;i<8;i++) { SCL = 0; delay_5us(); if ((temp&cucBit[i])!=0) SDA = 1; else SDA = 0; delay_5us(); SCL = 1; delay_5us(); } SCL = 0; _nop_();_nop_(); SDA = 1; _nop_();_nop_(); SFRPAGE = SFRPAGE_SAVE; } unsigned char I2C_Read(void) { unsigned char temp = 0; unsigned char i; char SFRPAGE_SAVE = SFRPAGE; SFRPAGE = CONFIG_PAGE; SCL = 0; delay_5us(); SDA = 1; delay_5us(); for(i=0;i<8;i++) { SCL = 1; delay_5us(); temp = (temp<<1)|SDA; SCL = 0; delay_5us(); } return temp; } void ADXL313_single_write(unsigned char reg_address,unsigned char reg_data) { I2C_Start(); I2C_Write(slave_address); I2C_RecvAck(); I2C_Write(reg_address); I2C_RecvAck(); I2C_Write(reg_data); I2C_RecvAck(); I2C_Stop(); } unsigned char ADXL313_single_read(unsigned char reg_address) { unsigned char reg_data; I2C_Start(); I2C_Write(slave_address); I2C_RecvAck(); I2C_Write(reg_address); I2C_RecvAck(); I2C_Start(); I2C_Write(slave_address + 1); I2C_RecvAck(); reg_data = I2C_Read(); I2C_SenNotAck(); I2C_Stop(); return reg_data; } void ADXL313_lianxu_read(void) { unsigned char i; I2C_Start(); I2C_Write(slave_address); I2C_RecvAck(); I2C_Write(0x32); I2C_RecvAck(); I2C_Start(); I2C_Write(slave_address + 1); I2C_RecvAck(); for(i=0;i<6;i++) { buf[i] = I2C_Read(); if (i==5) I2C_SenNotAck(); else I2C_SenAck(); } I2C_Stop(); } /* void ADXL313_lianxu_read(void) { buf[0]=ADXL313_single_read(0x32); buf[1]=ADXL313_single_read(0x33); buf[2]=ADXL313_single_read(0x34); buf[3]=ADXL313_single_read(0x35); buf[4]=ADXL313_single_read(0x36); buf[5]=ADXL313_single_read(0x37); } */ void ADXL313_Init(void) { ADXL313_single_write( 0x31,0x01 ); //全分辨率，数据右对齐，测量范围+-4G ADXL313_single_write( 0x2c,0x08 ); //100Hz数据传输率 ADXL313_single_write( 0x2d,0x08 ); //开启测量模式，关闭Sleep ADXL313_single_write( 0x2e,0x00 ); //关闭所有中断 ADXL313_single_write( 0x1e,0x00 ); //x轴偏移量 ADXL313_single_write( 0x1f,0x00 ); //y轴偏移量 ADXL313_single_write( 0x20,0x00 ); //z轴偏移量 } void Delay_40ms(void) { long i,j; for (i=0;i<4000;i++) for (j=0;i<1000;i++); }