GY-26电子指南针资料

// GY-26 IIC测试程序 // 使用单片机STC89C51 // 晶振：11.0592M // 显示：LCD1602 // 编译环境 Keil uVision2 // 程序中把模块当24c04进行通信 #include <REG51.H> #include <math.h> //Keil library #include <stdio.h> //Keil library #include <INTRINS.H> #define uchar unsigned char #define uint unsigned int #define DataPort P0 //LCD1602数据端口 #define WriteDeviceAddress 0xE0 //定义器件在IIC总线中的地址 #define ReadDviceAddress 0xE1 //器件在IIC总线中地址+1 typedef unsigned char BYTE; typedef unsigned short WORD; BYTE BUF[8]; //数据缓存区 BYTE code res[6] _at_ 0x23; sbit SCL=P1^0; //iic时钟引脚定义 sbit SDA=P1^1; //iic数据引脚定义 sbit LCM_RS=P2^0; //LCD1602命令端口 sbit LCM_RW=P2^1; //LCD1602命令端口 sbit LCM_EN=P2^2; //LCD1602命令端口 sbit KEY_1 =P2^6; //按键1 sbit KEY_2 =P2^5; //按键2 sbit KEY_3 =P2^4; //按键3 sbit KEY_4 =P2^3; //按键4 uchar templ,temph,cnt; uchar ge,shi,bai,qian; uint dis_data,dis_data1; void delay(unsigned int k); void InitLcd(); void WriteDataLCM(uchar dataW); void WriteCommandLCM(uchar CMD,uchar Attribc); void DisplayOneChar(uchar X,uchar Y,uchar DData); uchar HEX_TO_ASCII(uchar HEX_data); void conversion(uint temp_data); //------------------------------------ void Delay5us(); void Delay5ms(); void AT24C04_Start(); void AT24C04_Stop(); void AT24C04_SendACK(bit ack); bit AT24C04_RecvACK(); void AT24C04_SendByte(BYTE dat); BYTE AT24C04_RecvByte(); void AT24C04_ReadPage(); void AT24C04_WritePage(); void read_cmp(void); //----------------------------------- void cal_on(); void cal_off(); void recovery_factory(); void CMP_OFFS(); void IIC_ADDR_Change(); void delay_10ms(); //********************************************************* uchar HEX_TO_ASCII(uchar HEX_data) {uchar ASCII_data; switch(HEX_data){ case 0x00:ASCII_data=0x30;break; case 0x01:ASCII_data=0x31;break; case 0x02:ASCII_data=0x32;break; case 0x03:ASCII_data=0x33;break; case 0x04:ASCII_data=0x34;break; case 0x05:ASCII_data=0x35;break; case 0x06:ASCII_data=0x36;break; case 0x07:ASCII_data=0x37;break; case 0x08:ASCII_data=0x38;break; case 0x09:ASCII_data=0x39;break; case 0x0a:ASCII_data=0x41;break; case 0x0b:ASCII_data=0x42;break; case 0x0c:ASCII_data=0x43;break; case 0x0d:ASCII_data=0x44;break; case 0x0e:ASCII_data=0x45;break; case 0x0f:ASCII_data=0x46;break; } return(ASCII_data); } //********************************************************* void conversion(uint temp_data) { uchar ge_data,shi_data,bai_data ,qian_data; qian_data=temp_data/1000 ; temp_data=temp_data%1000; //取余运算 bai_data=temp_data/100 ; temp_data=temp_data%100; //取余运算 shi_data=temp_data/10 ; temp_data=temp_data%10; //取余运算 ge_data=temp_data; qian= qian_data; bai = bai_data; shi = shi_data; ge = ge_data ; } //********************************************************* void main() { unsigned int i; delay(500); InitLcd(); EA=0; cnt=0; while(1) //循环 { read_cmp(); //读出数据 //---------显示角度 dis_data=0; dis_data=BUF[1]; dis_data<<=8; dis_data|=BUF[2]; conversion(dis_data); ge=HEX_TO_ASCII(ge); shi=HEX_TO_ASCII(shi); bai=HEX_TO_ASCII(bai); qian=HEX_TO_ASCII(qian); DisplayOneChar(0,0,qian); DisplayOneChar(1,0,bai); DisplayOneChar(2,0,shi); DisplayOneChar(3,0,'.'); DisplayOneChar(4,0,ge); //---------显示温度 dis_data=0; dis_data=BUF[5]; dis_data<<=8; dis_data|=BUF[6]; if(dis_data>4095){ //如果bit-12为1，即符号位为负 DisplayOneChar(0,1,'-'); //显示负号 dis_data&=0xefff; //清符号位 } else DisplayOneChar(0,1,' ');//如果bit-12为0,空格,清空 conversion(dis_data); ge=HEX_TO_ASCII(ge); shi=HEX_TO_ASCII(shi); bai=HEX_TO_ASCII(bai); qian=HEX_TO_ASCII(qian); DisplayOneChar(1,1,qian); DisplayOneChar(2,1,bai); DisplayOneChar(3,1,shi); DisplayOneChar(4,1,'.'); DisplayOneChar(5,1,ge); DisplayOneChar(6,1,0XDF); //温度单位 DisplayOneChar(7,1,'C'); //温度单位 //-------显示磁偏量 dis_data1=0; dis_data1=BUF[3]; dis_data1<<=8; dis_data1|=BUF[4]; conversion(dis_data1); ge=HEX_TO_ASCII(ge); shi=HEX_TO_ASCII(shi); bai=HEX_TO_ASCII(bai); qian=HEX_TO_ASCII(qian); DisplayOneChar(7,0,qian); DisplayOneChar(8,0,bai); DisplayOneChar(9,0,shi); DisplayOneChar(10,0,'.'); DisplayOneChar(11,0,ge); //-------显示校准等级 conversion(BUF[7]); ge=HEX_TO_ASCII(ge); shi=HEX_TO_ASCII(shi); bai=HEX_TO_ASCII(bai); qian=HEX_TO_ASCII(qian); DisplayOneChar(10,1,bai); DisplayOneChar(11,1,shi); DisplayOneChar(12,1,ge); //----------按键检测 if(KEY_1==0){ delay_10ms(); if(KEY_1==0){ cal_on(); while(KEY_1==0)delay_10ms(); } } if(KEY_2==0){ delay_10ms(); if(KEY_2==0){ cal_off(); while(KEY_2==0)delay_10ms(); } } if(KEY_3==0){ delay_10ms(); if(KEY_3==0){ recovery_factory(); while(KEY_3==0)delay_10ms(); } } if(KEY_4==0){ delay_10ms(); if(KEY_4==0){ // CMP_OFFS(); IIC_ADDR_Change(); while(KEY_4==0)delay_10ms(); } } for (i=0;i<4000;i++); } } /*******************************/ void delay(unsigned int k) { unsigned int i,j; for(i=0;i<k;i++) { for(j=0;j<121;j++) {;}} } /*******************************/ void WaitForEnable(void) { DataPort=0xff; LCM_RS=0;LCM_RW=1;_nop_(); LCM_EN=1;_nop_();_nop_(); while(DataPort&0x80); LCM_EN=0; } /*******************************/ void WriteCommandLCM(uchar CMD,uchar Attribc) { if(Attribc)WaitForEnable(); LCM_RS=0;LCM_RW=0;_nop_(); DataPort=CMD;_nop_(); LCM_EN=1;_nop_();_nop_();LCM_EN=0; } /*******************************/ void WriteDataLCM(uchar dataW) { WaitForEnable(); LCM_RS=1;LCM_RW=0;_nop_(); DataPort=dataW;_nop_(); LCM_EN=1;_nop_();_nop_();LCM_EN=0; } /***********************************/ void InitLcd() { WriteCommandLCM(0x38,1); WriteCommandLCM(0x08,1); WriteCommandLCM(0x01,1); WriteCommandLCM(0x06,1); WriteCommandLCM(0x0c,1); } /***********************************/ void DisplayOneChar(uchar X,uchar Y,uchar DData) { Y&=1; X&=15; if(Y)X|=0x40; X|=0x80; WriteCommandLCM(X,0); WriteDataLCM(DData); } /***********************************/ /* void DisplayListChar(uchar X,uchar Y,uchar code *DData) { uchar ListLength=0; Y&=0x1; X&=0xF; while(X<=15) { DisplayOneChar(X,Y,DData[ListLength]); ListLength++; X++; } } */ /***********************************/ //********************************************************* void read_cmp(void) { uchar i; AT24C04_Start(); //起始信号 AT24C04_SendByte(WriteDeviceAddress); //发送设备地址+写信号 AT24C04_SendByte(0x00); //0表示命令 AT24C04_SendByte(0x31); //发送一次测量角度 AT24C04_Stop(); //停止信号 Delay5ms(); Delay5ms(); Delay5ms(); Delay5ms(); Delay5ms(); Delay5ms(); Delay5ms(); Delay5ms(); //延时，实际应用中可以执行其他程序 Delay5ms(); Delay5ms(); Delay5ms(); AT24C04_Start(); //起始信号 AT24C04_SendByte(WriteDeviceAddress); //发送设备地址+写信号 AT24C04_SendByte(0x00);